Minescape Pit Limit Dan Reserve

MODUL KURSUS MINESCAPE – PIT LIMIT & RESERVE CALCULATION AUG 2000 ______________________________________________________________________________________________________________________________ TUJUAN : -

Menentukan PIT LIMIT berdasarkan SR Optimum atau SR Rencana, kualitas, dsb., serta melakukan RESERVE CALCULATION dalam limit.

DESKRIPSI :

SR ? SR ? SR ? SR ?

SR kumulatif

DATA : Data yang diperlukan 1. Stratmodel 2. Quality Model 3. Surface Topography Terakhir

<<<-

diperoleh dari (reference ke) model geology diperoleh dari (reference ke) model geology surface topografi lama (original atau progress) dan surface topografi yang di-update dengan situasi terkini

4. Mining Parameters - Mining block size - Targeted SR: Maximum SR dan atau Cummulative SR - Loss and dillution - Walls configuration - Loss and dillution - 2nd priority: Dump Design and Road Design - 3rd priority: Haul distance and others 5. Strategi blending SR dan Quality antar pit Urutan Langkah Pekerjaan A.

Membuat Block Penambangan (Solid) 1. Membuat Side Definitions Side definitions adalah spesifikasi atau perlakuan yang akan diterapkan pada setiap sisi polygon penambangan, berupa informasi sudut kemiringan dan offset. -----------------------------------------------------------------------------------------------Minescape: SURFACE MINING > STRIPS > BLOCKS > SIDES > Create -----------------------------------------------------------------------------------------------Buatlah side definition (rancangan geometry bench), antara lain sebagai-berikut: a.

Side Name : FW (Foot Wall)

> ============================================================================================== Project:train_2 - M I N E S C A P E User:geology Side Name :

FW

Start Batter Angle : 37.5

( sesuai nama yang diketikkan ) ( sudut overall )

End Batter Angle : 37.5 ============================================================================================== Project:train_2 - M I N E S C A P E User:geology Side Name : Start Offset : 0

FW ( umumnya diisi 0 saja )

End Offset : 0 ==============================================================================================

Rearranged by FDJ - BMO

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MODUL KURSUS MINESCAPE – PIT LIMIT & RESERVE CALCULATION AUG 2000 ______________________________________________________________________________________________________________________________ b. Side Name : HW (High Wall) > ============================================================================================== Project:train_2 - M I N E S C A P E User:geology Side Name :

HW

Start Batter Angle : 42.5 End Batter Angle : 42.5 ============================================================================================== Project:train_2 - M I N E S C A P E User:geology Side Name :

HW

Start Offset : 0 End Offset : 0 ==============================================================================================

c. Side Name : EW (End Wall) Jika : - temporary, sudut tak boleh terlalu tegak, agar bisa bebas untuk bergerak lagi - final atau limit, sudut sama dengan highwall ( rekomendasi geoteknik ). > ============================================================================================== Project:train_2 - M I N E S C A P E User:geology Side Name :

EW

Start Batter Angle : 42.5 End Batter Angle : 42.5 ============================================================================================== Project:train_2 - M I N E S C A P E User:geology Side Name :

EW


d. Side Name : IW (Interior Wall) Catatan : Dapat dipakai sudut high-wall/side-wall atau 90 deg. > ============================================================================================== Project:train_2 - M I N E S C A P E User:geology Side Name :

IW

Start Batter Angle : 35 End Batter Angle : 35 ============================================================================================== Project:train_2 - M I N E S C A P E User:geology Side Name :

IW



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MODUL KURSUS MINESCAPE – PIT LIMIT & RESERVE CALCULATION AUG 2000 ______________________________________________________________________________________________________________________________ 2. Membuat Polygon Limit Penambangan Dengan menggunakan Magicad, buatlah polygon pada daerah yang berpotensi untuk ditambang atau pada setiap daerah yang akan di-evaluasi.

2.a.

3.a.

di-copy-kan 2.b.

3.b.

3.b.

3.a.

Komponen penting pembentuk polygon: a. Seam out-crop (gunakan out-crop / sub-crop dari seam terbawah jika merupakan multi seam pit) b. Struktur kontur elevasi terbawah (yang akan diuji batas ekonomisnya). Pembatas daerah tambang (pit area limitations) antara lain : - Batas KP - Sungai besar - Perkampungan penduduk - Pembatas lainnya ( disposal, jalan, dsb. ) 3.

Membuat garis-garis pembatas pada arah strip dan block a. Garis pembatas pada arah strip Buatlah dua garis pembatas pada bagian luar polygon pada arah strip. Start line: Out croop ; Finish line: Highwall b. Garis pembatas pada arah block Buatlah dua garis pembatas pada bagian luar polygon pada arah block. Start line: End wall ; Finish Line: End wall

4. Membuat batter block a. Membuat batter block pada arah STRIP Catatan : - clip polygon element tidak usah diisi dulu. ------------------------------------------------------------------Minescape: SURFACE MINING > STRIPS > LONG TERM > Generate Strips ------------------------------------------------------------------> ============================================================================================== Generate Batter blocks --- Input -----------------------------------------------------------------Line design file: BLOCKS Start line element : 19 End line element: 18 Clip polygon element: --- Side definitions ------------------------------------------------------Start side : FW Finish side : HW Left end side : HW Right end side : HW Interior side : HW --- Output ----------------------------------------------------------------Graphics group name : STRIP_BB Name prefix : S Start number : 01 --- Controls --------------------------------------------------------------Parallel lines : Yes Average width : 50.00 Minimum width : 30.00 Maximum width : 80.00 Strip mode : LEAVE ==============================================================================================

b. Membuat batter block pada arah BLOCK --------------------------------------------------------------------Minescape: SURFACE MINING > STRIPS > LONG TERM > Generate Strips --------------------------------------------------------------------Catatan : - Pada saat batter block di detail ada definisi batter block yang negatif untuk menyesuaikan definisi wall dengan yang ada di sebelahnya - Perhatikan penggunaan polygon sebagai elemen untuk meng-clip > ============================================================================================== Generate Batter blocks


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MODUL KURSUS MINESCAPE – PIT LIMIT & RESERVE CALCULATION AUG 2000 ______________________________________________________________________________________________________________________________ --- Input -----------------------------------------------------------------Line design file: BLOCKS Start line element : 17 End line element: 12 Clip polygon element: 14 --- Side definitions ------------------------------------------------------Start side : HW Finish side : HW Left end side : HW Right end side : FW Interior side : HW --- Output ----------------------------------------------------------------Graphics group name : BLOCK_BB Name prefix : B Start number : 01 --- Controls --------------------------------------------------------------Parallel lines : No Average width : 100.00 Minimum width : 50.00 Maximum width : 150.00 Strip mode : LEAVE ==============================================================================================

Catatan : - pemilihan element bisa dengan cara diketikkan atau dengan memilih di Magicad, dengan memakai kunci fungsi F8 atau Shift-F8, kemudian pindah ke Magicad untuk memilih dengan kursor. - periksa penamaan bench batter block, jika salah agar dilakukan edit. c. Meng-intersect batter block ------------------------------------------------------------Minescape: SURFACE MINING > STRIP > LONG TERM > Intersect ------------------------------------------------------------Catatan: - Untuk kebutuhan proses selanjutnya, gunakan batter blocks arah block sebagai primary list, dan batter blocks arah strip sebagai secondary list. > ============================================================================================== Intersect Batter Blocks --- Input -----------------------------------------------------------------Block names - primary list Block names - secondary list B30 B02 S01 S02 B03 B04 S03 S04 B05 B06 S05 S06 B07 B08 B09 B10 B11 B12 B13 B14 and/or and/or Primary list file: Second. list file: --- Output ----------------------------------------------------------------Graphics group : STRIPBLOCK_BB --- Name construction -----------------------------------------------------Name Type Name Value C SMA 1 123 2 123 ==============================================================================================

5. Menggabungkan Batter Block a. Menggabungkan batter block Catatan : hal ini dilakukan untuk menggabungkan batter block yang berukuran terlalu kecil untuk dipisahkan sebagai batter block tunggal. ----------------------------------------------------------Minescape: SURFACE MINING > STRIP > LONG TERM > Merge ----------------------------------------------------------> ============================================================================================== Merge Batter Blocks --- Input -----------------------------------------------------------------Block names: SMAB30S01A SMAB30S01B SMAB30S02 --- Output ----------------------------------------------------------------New batter block : SMAB30S02 Graphics group : STRIPBLOCK_BB --- Controls -------------------------------------------------------------Distance tolerance: ==============================================================================================

b. Menggabungkan batter block yang berukuran kecil ---------------------------------------------------------------Minescape: SURFACE MINING > STRIP > LONG TERM > Merge Small ---------------------------------------------------------------Rearranged by FDJ - BMO

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MODUL KURSUS MINESCAPE – PIT LIMIT & RESERVE CALCULATION AUG 2000 ______________________________________________________________________________________________________________________________ > 6. Membuat solid block a. Membuat batter block file list ---------------------------------------------------------------Minescape: GENERAL > BLOCKS > BATTER BLOCKS > File List ---------------------------------------------------------------ketikkan nama file > ( ketikkan nama file dan periksa di daftar file jenis data ) b. Membuat solid dari batter block Catatan : - sebelumnya harus terlebih dulu ada surface dari Seam terbawah (total floor) -------------------------------------------------------Minescape: GENERAL > SURFACE > EXPRESSION > Create -------------------------------------------------------> ============================================================================================== Project:train_2 - M I N E S C A P E User:geology Surface Expression Management Schema : Name :

SCH_00_A_2

*) pemilihan skema dengan SET SCHEME

TOTFL_H

*) penamaan surface untuk dipakai selanjutnya

totalfloor ('H') Display Definition :

*) ekspresi untuk menentukan surface terbawah RED

Unit Category : DEPTH Unit : Metres ==============================================================================================

c. Generate Solid : ----------------------------------------------------------Minescape: SURFACE MINING > STRIP > LONG TERM > Project ----------------------------------------------------------> ============================================================================================== Generate Solids from Batter Blocks (1 of 2) --- Schema ----------------------------------------------------------------Schema : SCH_00_A_2 Model type : GRID --- Input Batter Blocks ---------------------------------------------------Block list file: BB_LIST and/or Blocks to project : (dikosongkan kalau sudah ada block list file) ==============================================================================================

> (lanjutan )

============================================================================================== Generate Solids (2 of 2) --- Output ---------------------------------------------------------------Graphics group for solids : SOLIDSS Graphics group for final batter blocks : SOLIDSS_FB --- Solid Construction Operations ----------------------------------------Operation Label Surface Save now LOCATE TOTFL_H No UP TOPO_1000_BOR Yes --- Name construction -----------------------------------------------------Solid Type Value Batter Type Value Names C SOL Block 1 456789 Names --- Controls --------------------------------------------------------------Generate batter blocks of the final projected polygons?: No Perimeter sampling length: 5 Side sampling frequency: 1.000 Batter angles are maximum slopes?: Yes ==============================================================================================

7. Memeriksa solid block dengan cross sections a. Membuat solid file list ............................. ------------------------------------------------------Minescape: GENERAL > BLOCKS > SOLIDS > File List Rearranged by FDJ - BMO

A.7.a

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MODUL KURSUS MINESCAPE – PIT LIMIT & RESERVE CALCULATION AUG 2000 ______________________________________________________________________________________________________________________________ ------------------------------------------------------> ( ketikkan nama file dan periksa di daftar file jenis data ) b. Membuat beberapa line section untuk maksud pemeriksaan Catatan : - buat group baru : - group solid di-on-kan : c. Membuat cross section - Menampilkan surfaces pada cross section ----------------------------------------------------------Minescape: GENERAL > GRAPHICS > SECTIONS > Surface ---------------------------------------------------------->

============================================================================================== Create a Section through Surfaces (1 of 2) --- Input -----------------------------------------------------------------Schema : SCH_00_A_2 Model type : GRID Surfaces : TOPO_1000_BOR Intervals

:

L L_1 K J1 J I1 I H G Section line design file : BLOCKS --- Output ----------------------------------------------------------------Design file : SCT2D_00 Default group : CHECK_SOL Append? : No Graphics title: Suka-suka --- Input/Output ----------------------------------------------------------Section elements Output groups Append? 2D X origin 2D Y origin 1549 0.00 0.00 ==============================================================================================

> ( lanjutan )

============================================================================================== Create a Section through Surfaces (2 of 2) --- Controls --------------------------------------------------------------Number of steps : Step size : 5.00 Top surface limit : Bottom surf. limit: Section plane dip : 90.00 Orientation grids?: Yes Z exaggeration : 1.00 Grid Z interval : 50.00 Grid XY interval : Minimum level : -200.00 Maximum level : 100.00 ==============================================================================================

- Menampilkan solid pada cross section ---------------------------------------------------------Minescape: GENERAL > GRAPHICS > SECTIONS > Blocks ---------------------------------------------------------> ============================================================================================== Create a Section through Solid Blocks (1 of 2) --- Schema ----------------------------------------------------------------Schema : SCH_00_A_2 Model type : GRID --- Input -----------------------------------------------------------------Solids: SOLHB03S05 SOLHB03S04 SOLHB03S03 SOLHB03S02 Section line design file : BLOCKS --- Output ----------------------------------------------------------------Design file : SCT2D_00 Default group : CHECK_SOL Append? : Yes Graphics title: Suka-suka --- Input/Output ----------------------------------------------------------Section elements Output groups Append? 2D X origin 2D Y origin 1549 0.00 0.00 ==============================================================================================

> ( lanjutan )

============================================================================================== Create a Section through Solid Blocks (2 of 2) --- Controls --------------------------------------------------------------Number of steps : Step size : 5.00 Section plane dip : 90.00 Orientation grids?: No Z exaggeration : 1.00 Grid Z interval : 50.00 Grid XY interval : Minimum level : -200.00 Maximum level : 100.00 ==============================================================================================

B. Membuat Table Reserve 1. Men-setup table reserve -----------------------------------------------------------Minescape: GEOLOGY > STRATIGRAPHIC > RESERVE > Setup Rearranged by FDJ - BMO

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MODUL KURSUS MINESCAPE – PIT LIMIT & RESERVE CALCULATION AUG 2000 ______________________________________________________________________________________________________________________________ -----------------------------------------------------------> ============================================================================================== Set up Sampling Controls and Options --- Schema Schema

----------------------------------------------------- (Optional) : SCH_00_A_2 Model type : GRID

--- Definitions ------------------------------------------------ (Optional) Surface representing topography : TOPO_1000_BOR --- Optional Sample Table Columns Volume : Yes Top area : No Top slope : No Top azimuth : No Mass : Yes True thickness : No Block area : Yes

-----------------------------------------Plan area : No Bottom area : No Bottom slope : No Bottom azimuth : No Parting : Yes Vert.thickness : Yes

--- Display Definitions ------------------------ (Design File Output Only) Samples : BLOCK ==============================================================================================

2. Membuat table reserve dari solid ----------------------------------------------------------------------------Minescape: GEOLOGY > STRATIGRAPHIC > RESERVE > SAMPLE > SAMPLE+ > Solid ---------------------------------------------------------------------------->

============================================================================================== Generate Surface Samples from Solids (1 of 3) --- Schema ----------------------------------------------------------------Schema : SCH_00_A_2 Model type : GRID --- Input Solids ----------------------------------------------------------Solid list file : SOL_LIST and/or Solid name Solid recovery Solid name Solid recovery

--- Table Output ----------------------------------------------------------Table file : RES_BDS Solid column : NAMA_BLOCK Block area : BOTTOM (Surface : TOPO_1000_BOR ) --- Design File Output ----------------------------------------- (Optional) Design file : Graphics group : Append? : Graphics title : --- Controls --------------------------------------------------------------Sample type : AREA Sample density : 200.000 Accumulate? : No Use centroid? : Yes ==============================================================================================

> ( lanjutan )

============================================================================================== Generate Surface Samples (2 of 3) --- Schema ----------------------------------------------------------------Schema : SCH_00_A_2 Model type : GRID --- Input Reserve Intervals ------------------------------------ (Optional) Res. int. column: SEAM Burden column : BURDEN Reserve intervals Selection expressions LUU thick('LUU')>=0.1 I thick('LUL')>0.1 H G Surface representing topography : TOPO_1000_BOR --- Input Surface Sets ----------------------------------------- (Optional) Subset column : Subset name Upper surface Lower surface Selection expression

--- Geological Surfaces/Intervals ------------------------------ (Optional) Surfaces : TOPO_1000_BOR Intervals : ==============================================================================================

> ( lanjutan )

============================================================================================== Evaluate Qualities for Samples (3 of 3) --- Models ----------------------------------------------------------------Schema : SCH_00_A_2 Model type : GRID Quality : Q_BLOCK_A --- Input Qualities -------------------------------------------- (Optional) Qualities : RD TSAD ---

Washability


------------------------------------------------ (Optional)

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MODUL KURSUS MINESCAPE – PIT LIMIT & RESERVE CALCULATION AUG 2000 ______________________________________________________________________________________________________________________________ Include washability? : Reserve intervals Input wash table files

Output wash table files

Search radius : ==============================================================================================

Catatan : - Gunakan Solid file list yang telah dibuat pada A.7.a di atas untuk pembuatan table reserve ini - Jawab No untuk pertanyaan Controls: Accumulate ? 3. Memperhitungkan loss and dillution pada table reserve -------------------------------------------------------------------Minescape: GEOLOGY > STRATIGRAPHIC > RESERVE > Mining Reserve ------------------------------------------------------------------->

============================================================================================== Calculate Mining Reserves --- Models ----------------------------------------------------------------Schema : SCH_00_A_2 Model type : GRID Quality : Q_BLOCK_A --- Input -----------------------------------------------------------------Table file : RES_BDS --- Output ----------------------------------------------------------------Table file : RES_MIN --- Loss and Dilution for Reserve Intervals -------------------------------Res. Interval Loss Loss Type Dilution Surface Dil. Default Dil. Type I1L 10.00 PERCENT IUUU 10.00 PERCENT IUUL 10.00 PERCENT IUL 10.00 PERCENT ILU 10.00 PERCENT ILL 10.00 PERCENT --- Controls --------------------------------------------------------------Quality basis to output : INSITU ROM moisture value : Type: Product moisture value : Type: TOTALPERCENT ==============================================================================================

4. Mengakumulasikan table reserve .............................. B.4. --------------------------------------------------------------Minescape: GEOLOGY > STRATIGRAPHIC > RESERVE > Accumulate --------------------------------------------------------------> ============================================================================================== Accumulate Surface Samples --- Input -----------------------------------------------------------------Table file : RES_MIN --- Output ----------------------------------------------------------------Table file : ACC_RES_MIN ==============================================================================================

5. Mengubah format (reformat) table reserve a. Men-setup reformat table reserve -------------------------------------------------------------------Minescape: GEOLOGY > STRATIGRAPHIC > RESERVE > REFORMAT > Setup ------------------------------------------------------------------->

============================================================================================== Set Columns for Reformatted Sample Table (1 of 2) --- Reporting Controls ----------------------------------------------------X,Y centroid? : No Elevation limits? : No Surface limits? : No Total volume? : Yes Total in situ mass? : Yes Total raw recoverable mass?: Yes Total masses for all bases?: No Top slope? : No Top slope direction? : No Bottom slope? : No Bottom slope direction? : No Quality area? : No Interval plan area? : No Interval slope area? : No Interval average thickness?: No Interval true thickness? : No Interval vert. thickness? : No Interval floor slope? : No Interval floor slope dir.? : No Interval volume? : No Interval in situ mass? : No Interval raw recov. mass? : No Interval masses for bases? : No Interval loss? : No Interval dilution? : No Surfaces? : No Surface slopes? : No Surface slope directions? : No Block area? : No ==============================================================================================

> ( lanjutan )

============================================================================================== Set Columns for Reformatted Sample Table (2 of 2)


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MODUL KURSUS MINESCAPE – PIT LIMIT & RESERVE CALCULATION AUG 2000 ______________________________________________________________________________________________________________________________ --- Reporting Controls (Continued) ----------------------------------------Overburden volume? : Yes Overburden area? : No Overburden av. thickness? : No Overburden vert. thickness?: No Parting volume? : Yes Parting area? : No Parting average thickness? : No Underburden volume? : Yes Underburden area? : No Underburden av. thickness? : No Underburden vert.thickness?: No Interburden volume? : Yes Interburden interval name? : No Interburden area? : No Interburden av. thickness? : No Interburden vert.thickness?: No Unassigned volume? : Yes Unassigned area? : No Unassigned av. thickness? : No Unassigned vert. thickness?: No Qualities to output: RD TSAD ==============================================================================================

b. Reformat table reserve ---------------------------------------------------------------------------Minescape: GEOLOGY > STRATIGRAPHIC > RESERVE > REFORMAT > Block Format ---------------------------------------------------------------------------> ============================================================================================== Reformat a Sample Table --- Schema ----------------------------------------------------------------Schema : SCH_00_A_2 Model type : GRID --- Input -----------------------------------------------------------------Table file: ACC_RES_MIN Selection expression : --- Output ----------------------------------------------------------------Table file: RFM_ACC_RES_MIN Reserve run description : --- Naming Components ------------------------------------------ (Optional) Identifier Type Value ==============================================================================================

6. Menambahkan kolom pada table reserve Beberapa kolom perlu ditambahkan pada table reserve yang telah di-reformat dengan maksud untuk menampung informasi tambahan, seperti berikut: - Total Overburden - SR - SR Color - Cumulative Overburden - Cumulative Raw Recoverable Mass - SR Cumulative - SR Cumulative Color a. Menambahkan kolom Total Overburden, SR, dan SR Color Untuk menambahkan tiga kolom di atas, diperlukan MXL yang mengandung formula yang sesuai untuk kolom-kolom tersebut di atas. Adapun formula untuk kolom-kolom di atas sbb: Total Overburden = Total Volume - ( Total Recoverable Mass / RD ) SR = Total Overburden / Total Recoverable Mass SR Color = (SR / SR Maximum) * 75 + 125 SR Color Cumulative = (SR Cum / SR Targeted) * 75 + 125 Note: Coloring pada Minescape adalah Min (White) = 100 dan Max (Red) = 200, sehingga warna SR akan merupakan gradasi dari White (Low SR) hingga Red (High SR). 1. Membuat MXL untuk penambahan kolom TOTAL_OVERBURDEN, SR, dan SR_COLOR Minos: MINESCAPE > Examine MXL Files, dan Minos: Create - total_overburden.mxl Ketikkan pada layar e-macs: TOTAL_VOLUME - (TOTALRAWRECMASS / 1.3) - sr.mxl Ketikkan pada layar e-macs: TOTAL_OVERBURDEN / TOTALRAWRECMASS - sr_color.mxl Ketikkan pada layar e-macs: if sr<=11 then Rearranged by FDJ - BMO

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MODUL KURSUS MINESCAPE – PIT LIMIT & RESERVE CALCULATION AUG 2000 ______________________________________________________________________________________________________________________________ (SR / 10) * 75 + 125 else 200 endif - sr_cum_color.mxl Ketikkan pada layar e-macs: (SR_CUM / 7) * 75 + 125 Note: Pada contoh di atas, diasumsikan bahwa SR Maximum adalah 11 dan SR cumulative yang ditargetkan adalah 7. 2. Membuat kolom TOTAL_OVERBURDEN, SR dan SR_COLOR Buatlah kolom TOTAL_OVERBURDEN, SR dan SR_COLOR secara berurutan dengan menggunakan MXL yang telah dipersiapkan di atas. Gunakan -f untuk memanggil/ mengaplikasikan MXL pada field expression, contoh: Expression: -f total_overburden.mxl -----------------------------------------------------------Minescape: GENERAL > FILES > TABLE > COLUMN > Create -----------------------------------------------------------> ============================================================================================== Add a Column to an Existing Table --- Input -----------------------------------------------------------------Table file : RFM_ACC_RES_MIN --- Column Details --------------------------------------------------------Column : TOTAL_BURDEN Column description : total burden nya Column type : NUMERIC Column length : Column unit category: DECIMAL2 Column units : Stnd Metric Column parent : --- Initialisation --------------------------------------------------------Expression : -f total_burden.mxl ==============================================================================================

b. Menambahkan kolom CUM_OVERBURDEN, CUM_RAWRECMASS, SR_CUM dan SR_CUM_COLOR (di dump ke file ascii) 1. Melakukan unloading data dari table reserve Step ini adalah untuk mendapatkan data-data yang diperlukan dari table reserve di atas untuk kemudian diproses dengan menggunakan spreadsheet untuk mendapatkan SR Cumulative. Data yang diperlukan untuk keperluan ini diperoleh dari kolom-kolom sebagai berikut: - SOLID_NAME - TOTAL_OVERBURDEN, dan - TOTALRAWRECMASS Dengan Minescape: ---------------------------------------------------------Minescape: GENERAL > FILE > TABLE > EXPORT > unload ---------------------------------------------------------> 2. Dengan bantuan program FTP di Windows system, pindahkan data unload tersebut ke PC 3. Pada PC, dengan menggunakan berbagai macam jenis program spreadsheet, seperti Excell atau Lotus 123, lakukanlah pemrosesan data untuk mengakumulasikan nilai TOTAL_OVERBURDEN dan TOTALRAWRECMASS pada arah devide, dan bukan pada arah strip. Pada spreadsheet ini, tambahkan kolom baru yang berisi nilai kumulatif dari TOTAL_OVERBURDEN dan TOTALRAWRECMASS, serta SR_CUM, dimana: SR_CUM = TOTAL_OVERBURDEN / TOTALRAWRECMASS Catatan: Penting untuk diperhatikan, agar pada saat editing atau pemrosesan data untuk tidak merubah susunan atau urutan row. Setelah selesai dengan step penambahan kolom baru, simpan informasi dari spreadsheet ke dalam bentuk TXT file. -

4. Dengan bantuan program FTP, transfer file TXT di atas ke Minescape dengan project yang sama pada directory Data File. Rearranged by FDJ - BMO

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MODUL KURSUS MINESCAPE – PIT LIMIT & RESERVE CALCULATION AUG 2000 ______________________________________________________________________________________________________________________________ 5. Membuat dan mengisikan kolom tambahan CUM_OVERBURDEN, CUM_RAWRECMASS, dan SR_CUM. a. Membuat kolom tambahan pada table reserve -------------------------------------------------------Minescape: GENERAL > FILE > TABLE > COLUMN > Create -------------------------------------------------------> Note: Buatlah tiga buah kolom tambahan yaitu CUM_OVERBURDEN, CUM_RAWRECMASS dan SR_CUM dengan masing-masing kolom tersebut berisi nilai 0 (Nol). b. Meng-update nilai pada kolom tambahan Note: Kolom CUM_OVERBURDEN akan di-update isinya dengan informasi cumulative overburden yang berasal dari Data File yang terakhir ditransfer melalui FTP. Demikian Juga, CUM_RAWRECMASS dan SR_CUM akan di-update oleh nilai cumulative total raw recoverable mass dan cummulative SR dari Data File yang sama. -------------------------------------------------------Minescape: GENERAL > FILE > TABLE > IMPORT > Load -------------------------------------------------------> ============================================================================================== Load Data to a Table --- Input -----------------------------------------------------------------Data file : RES_MA.PRN --- Output ----------------------------------------------------------------Table file : RFM_ACC_RES_MIN --- Controls --------------------------------------------------------------Table column Fixed format? Start position Field length/token number BURDEN_CUM No 1 4 COAL_CUM No 1 5 SR_CUM No 1 6 Delete existing table?: No Update existing rows? : Yes Table start row : 1 ==============================================================================================

6. Membuat dan mengisikan kolom tambahan SR_CUM_COLOR Dengan memanfaatkan MXL yang telah dibuat pada step B.7.a.1 di atas, maka buat dan isikan kolom SR_CUM_COLOR. -------------------------------------------------------------Minescape: GENERAL > FILE > TABLE > COLUMN > Create -------------------------------------------------------------> Note: - Pada expression field isikan: -f sr_cum_color.mxl C. Meng-identifikasi daerah penambangan prospek Terdapat dua kriteria yang secara bersamaan dipertimbangkan untuk menentukan daerah tambang yang mineable. Kriteria tersebut adalah dengan membatasi daerah tambang berdasarkan SR Maksimum dan SR kumulatif yang telah ditargetkan. Hingga step di atas, telah dihasilkan dua informasi yang diperlukan tersebut yang akan digunakan untuk meng-identifikasi daerah tambang yang mineable. Identifikasi dilakukan dengan membuat polygon yang membatasi daerah tambang berdasarkan SR maksimum dan SR kumulatif, dimana kedua buah polygon tersebut dibuat dengan melihat SR pada setiap block tambang. Kondisi prospek atau optimum adalah block pertama yang dijumpai dari arah out-croop ke down dip yang harga SR-nya merupakan SR pembatas. 1. Meng-identifikasi daerah tambang berdasarkan SR maksimum a. Menampilkan informasi SR maksimum Note: Informasi yang perlu ditampilkan pada layar Magicad dari table reserve adalah kolom solid name dan SR ----------------------------------------Minescape: SPECIAL > Reserve Graphic ----------------------------------------> b. Meng-identifikasi daerah prospek melalui pembuatan polygon dengan cara melakukan snapping pada block tambang. 2. Meng-identifikasi daerah tambang berdasarkan SR targeted a. Menampilkan informasi SR targeted Note: Rearranged by FDJ - BMO

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MODUL KURSUS MINESCAPE – PIT LIMIT & RESERVE CALCULATION AUG 2000 ______________________________________________________________________________________________________________________________ Informasi yang perlu ditampilkan pada layar Magicad dari table reserve adalah kolom solid name dan SR_CUM ----------------------------------------Minescape: SPECIAL > Graphic Reserve ----------------------------------------> b. Meng-identifikasi daerah prospek melalui pembuatan polygon dengan cara melakukan snapping pada block tambang. 3. Membuat polygon intersect dari kedua polygon di atas. Gunakan batas polygon yang pertama dijumpai dari arah out-croop ke down dip. …... C.3. D. Menghitung Coal Reserve 1. Men-clip table reserve dengan polygon batas penambangan optimum Catatan : - dibuat polygon limit optimum, yang digunakan untuk meng-clip tabel reserve (tabel individual sebelum accumulated) ---------------------------------------------Minescape: GENERAL > RESERVE > Clip --------------------------------------------->

============================================================================================== Clip Surface Samples to Design File Polygons --- Input -----------------------------------------------------------------Table file : RES_MIN --- Polygon Domains Domain design file : IDs : 1626 Include? : Yes

-------------------------------------------------------BLOCKS

--- Output ----------------------------------------------------------------Table file : CLIP_RES_MIN ==============================================================================================

2. Meng-accumulate tabel reserve

---------------------------------------------Minescape: GENERAL > RESERVE > Clip --------------------------------------------->

============================================================================================== Accumulate Surface Samples --- Input Table file

-----------------------------------------------------------------: CLIP_RES_MIN

--- Output ----------------------------------------------------------------Table file : ACC_CLIP_RES_MIN ==============================================================================================

Catatan: Table reserve yang digunakan adalah table reserve yang dihasilkan pada step B.4. di atas, sementara itu polygon yang digunakan adalah yang dihasilkan pada C.3. 3. Membuat report dari coal reserve ---------------------------------------------------Minescape: GENERAL > RESERVE > REPORT > Summary ---------------------------------------------------> ============================================================================================== Report a Sample Table using Repent --- Input -----------------------------------------------------------------Table file : ACC_CLIP_RES_MIN Selection expression : Repent files : \TABLES/MINESCAPE/REPDEF/RESSUM --- Output ----------------------------------------------------------------Report file : RPT_ACC_CLIP_RES_MIN Report description : Laporan optimum nya --- Naming Components -----------------------------------------------------Identifier Type Value ==============================================================================================

Catatan : - batas stripblock optimum ini kemudian dipakai untuk melakukan perhitungan ulang (re-design) yang lebih rinci - Jenis report lain yang bisa untuk ditampilkan juga adalah Quality, Stripping Ratio, Mining, Burden, Interval, dsb. Rearranged by FDJ - BMO

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MODUL KURSUS MINESCAPE – PIT LIMIT & RESERVE CALCULATION AUG 2000 ______________________________________________________________________________________________________________________________ > ============================================================================================== Report a Sample Table using Repent --- Input -----------------------------------------------------------------Table file : ACC_CLIP_RES_MIN Selection expression : Repent files : \TABLES/MINESCAPE/REPDEF/RESRATIO --- Output ----------------------------------------------------------------Report file : RPT_SR Report description : Laporan pertanggungan SR --- Naming Components -----------------------------------------------------Identifier Type Value ==============================================================================================

E. Menampilkan Lay-out Daerah Penambangan Catatan : - menggunakan batas optimum yang dihitung - Element limit di-drape ke floor seam ---------------------------------------------------------------------Minescape : SURFACE MINING > STRIPS > SURFACES > PROCESS > Drape ---------------------------------------------------------------------> ============================================================================================== Drape Graphics Elements on to a Surface --- Input/Output Elements -------------------------------------------------Design file : BLOCKS Search groups : and/or Elements to drape: 1630 1631 1629 --- Input Surface ---------------------------------------------------------Schema : SCH_00_A_2 Model type : GRID Surface expression: tot_fl_h --- Controls --------------------------------------------------------------Sampling interval: 2.00 ==============================================================================================

----------------------------------------------------------------Minescape: SURFACE MINING > STRIP > SHORT TERM > Excavation ---------------------------------------------------------------->

============================================================================================== Generate Crests and Toes using Projection and Offset --- Schema ----------------------------------------------------------------Schema : SCH_00_A_2 Model type : GRID --- Input -----------------------------------------------------------------Design file for construction elements : BLOCKS --- Output ----------------------------------------------------------------Design file : BLOCKS Graphics group: PIT_PROJECTION Append? : No Graphics title: Proyeksi untuk layout --- Construction Operations -----------------------------------------------Operation Element Side Angle/ Bearing Bench Surface Label I.D. Definition Offset Height LOCATE 1630 TOT_FL_H UP FW TOPO_1000_BO --- Controls --------------------------------------------------------------Sampling density: 5.00 Filtering tolerance: ==============================================================================================

Catatan : Jika, dilakukan bersamaan, maka beginilah formatnya : ============================================================================================== Generate Crests and Toes using Projection and Offset --- Schema ----------------------------------------------------------------Schema : SCH_00_A_2 Model type : GRID --- Input -----------------------------------------------------------------Design file for construction elements : BLOCKS --- Output ----------------------------------------------------------------Design file : BLOCKS Graphics group: PIT_PROJECTION Append? : No Graphics title: Proyeksi untuk layout --- Construction Operations -----------------------------------------------Operation Element Side Angle/ Bearing Bench Surface Label I.D. Definition Offset Height LOCATE 1630 TOT_FL_H


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MODUL KURSUS MINESCAPE – PIT LIMIT & RESERVE CALCULATION AUG 2000 ______________________________________________________________________________________________________________________________ UP LOCATE UP LOCATE UP

1631 1629 -

FW EW HW

-

-

-

TOPO_1000_BO TOT_FL_H TOPO_1000_BO TOT_FL_H TOPO_1000_BO

--- Controls --------------------------------------------------------------Sampling density: 2.00 Filtering tolerance: ==============================================================================================

Catatan : - terus, element-element (segment) yang terbentuk dari hasil proyeksi di-connect


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Minescape Pit Limit Dan Reserve

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