GUIDE TO COAL MINING EXTRACTION FOR LISAT PIT CONCESSION OF PT TEGUH SINAR ABADI‐BAYAN RESOUR Tbk, ,
‐ General Coal General Coal Stratigraphy Stratigraphy, physical and characteristic of coal , physical and characteristic of coal Exposing Coal ‐ Exposing Coal ‐ Cleaning Coal ‐ Coal Getting & Stocking g g ‐ Coal Loading & Hauling
Prepared & presented by: La Ode Sapta A. Sn. Geologist, Melak Mine Project
PT. THIESS CONTRACTORS INDONESIA
MELAK MINE PROJECT
Introduction
Maksud : ‐ Memberikan gambaran umum Kondisi Fisik dan Karakter batubara di Pit Lisat Memberikan gambaran umum Kondisi Fisik dan Karakter batubara di Pit Lisat ‐ Memberikan pemahaman prosedur yang benar dalam hal pembukaan batubara (expose), hingga pengangkutan batubara ke pelabuhan.
Tujuan & Sasaran : Sasaran: ‐ Peserta dapat mengaplikasikan prosedur ekspose batubara hingga loading batubara di lapangan ‐ Peserta mempunyai rasa memiliki terhadap bahan tambang (batubara) ‐ Peserta dapat bertanggung jawab atas operasional penambangan batubara ‐ Peserta memahami dengan baik prosedur yang benar dan dianjurkan. ‐ Peserta tidak melakukan pekerjaan diluar prosedur yang dianjurkan ‐ Menghasilkan produk batubara yang berkualitas baik untuk kepuasan client dan prestasi yang baik untuk karyawan dan perusahaan PT Thiess Contaractors Indonesia untuk karyawan dan perusahaan PT Thiess Contaractors Indonesia.
Coal on Lisat Pit
Lisat General Coal Stratigraphy / Urutan lapisan batubara Pit Lisat 25 m 50 m 15-18 m 60 m
20 m topo
Seam 2
Based on TSA Geological Model There is 6 Groups of Coal Seam With various thickness
Seam 1
Seam F
Seam E
Seam D
Seam C
Coal Model Lisat Pit
Coal Model Lisat Pit
S2
SE S1 S2 S1
S2
SC SF
Coal on Lisat Pit
Seam 2_1; 2_2
Seam 1_4; 1-3;1-2;1_1
Coal on Lisat Pit
Seam D
Coal on Lisat Pit
Coal on Lisat Pit
Parting, carbonaceous material
Clay band, sometime thick or thinning, or be lost in other place
Coal with clay band structure
Coal on Lisat Pit
Batubara atuba a dengan de ga struktur st u tu menyerpih, e ye p , susunan susu a tidak t da teratur te atu
Exposing Coal Guide for Exposing Coal in Lisat SEAM THICKNESS
Seam Directions SEAM
COAL TYPE
HARDNESS
EXPOSE TO COAL ROOF
COAL PROTEC'N
<0.4m
Bright Dull Top clay band
Variable Hard Variable
No - Leave 3 cm (+) over coal Expose to coal Expose into clay band
Required
2U
F
D_1
D_2 PC1250, D, D8 maybe D9 D7, D9 Cat824, PC 1250, D7maybe D9
0.4 ~ 0.9m
Bright top Dull Top clay band
Variable Hard Variable
No - Leave 3 cm (+) over coal Expose to coal Expose into clay band
Required
CL
D
E_1
E_2 Cat824, PC1250, D7maybe D9 D7, D9 Cat824, PC1250, D7maybe D9
>0.9m
Bright top Dull Top clay band
Variable Hard Variable
No - Leave 3 cm (+) over coal Expose to coal Expose into clay band
Required
2_1
2_2
1_1
1_1
1_2
1_3
1_2 Cat824, PC 1250, D7maybe D9 Cat824, PC 1250, D7maybe D9 1_4 Cat824, PC1250, D7maybe D9
NB: the above is only a guide to overburden operations that expose coal and is required to minimise coal losses. Wherever possible - All bright friable coal must be preserved for product - particularly the tops of seams.
EQUIPMENT SELECTION
Exposing Coal Bright Coal Seam Æ all seam on Lisat
Expose yang salah Expose yang salah.
Cara expose yang benar, buka coal line terlebih dahulu
Exposing Coal
Bund Wall
Min. 10 cm
Leave OB min. 10 cm
Sisakan OB / interburden minimal tebal 10 – 30 cm. For better coal recovery, expose coal to minimum 10 cm from roof coal Avoid over dig on coal seam / Hindari Over Dig pada batubara.
Exposing Coal
Do not drop p OB on the top p of coal.
Exposing Coal
Leave OB / interburden minimum thick 10 cm.
Exposing Coal Exposing coal strategy
Material sliding g / fall down Æ contaminate Min. 1.00 m from lowest seam (if any)
Max. expose high : 5-6 m Max. expose high : 5-6 m Max. expose high : 5-6 m
Eksose dengan space antara seam terbawah adalah minimum 1.00 m Bund wall, can reduce contamination when rainy
Coal characteristic of Seam S1 – S2 not consistent as coal body, to avoid that lowest seam have been expose. Material From top side not sliding cause of unstable slope, the impact is coal can contaminate. If possible, make bund wall on the top for drainage and anticipate when rain day, coal body not contaminate by mud water flowing through coal roof/body
Min. 1.00 m from lowest seam (if any)
Max. expose high : 5-6 m
Exposing Coal
Over dig space min. 1.00 m to start drop cut
Hindari Over dig, usahakan big digger menggali OB dengan jarak minimal 1 m dari seam paling bawah. NB : Generally coal loose often occurred in this case particularly on night shift Occurred cause of top coal face not clean up perfectly, or covered by bund wall
Exposing Coal
Material top soil berjatuhan karena ekspos yang salah, dapat menyebabkan b bk kontaminasi k t i i batubara b t b
Exposing Coal
Coal contaminate by mud on melamuk pit. It must be expose the coal line / cropline first before exposing coal, no bundwall
Exposing Coal
material on the top will fall down to coal face
Wrong expose, it should be remove top soil first to found coal line
Exposing Coal
1.00 m
Good expose, minimum interburden 10 cm left on roof coal, top coal face with space 1.00 meters.
Cleaning Coal Cleaning Coal l l Bund Wall Remove OB/IB/Parting push & press until coal roof face (max. coal cleaned 5 cm from top roof)
Clean up coal always use Coal Bucket Excavator
Bund Wall
Clean coal
Load as OB
Coal Getting
Bund Wall
Sisakan minimal 10 cm
Sisakan Floor minimum 10 cm jika lapisan batubara sulit untuk di stock
Cleaning Coal
Always use coal bucket excavator, always use Hitachi 330 reach from top to bottom with slow motion bottom with slow motion
Cleaning Coal
Clean coal, nice expose, ready to mine out
Cleaning coal
Clay on ROM, please avoid this problem before the penalty from client.
Stocking Coal Stocking coal strategy k l
Top face, getting coal from here to bottom Maximize Stocking coal min. high : 2 - 3 m
Coal suggested to stock until flat with base - Stocking coal use PC400 with clean track condition (no mud)
‐ Reach and touch coal body slowly from top side to bottom Touch and press slowly with bucket because coal to many cleat ‐ Touch and press slowly with bucket, because coal to many cleat and clay banded with shalley structure, it will be fall down ‐ Coal stock in along expose coal
Maximize Stocking coal min. high : 2 - 3 m
Not suggested Æ double handling Æ cost
Stocking Coal
Stock coal along expose coal if possible, reach from top to bottom.
Stocking Coal
Good stocking, stocking height minimum 2 – 3 m for better cycle time.
Loading Coal
ALLOWED Range of Load 28 – 30 Tonnes
BENAR
NOT ALLOWED! Load > 30 Tonnes
SALAH
MUATAN RATA TANPA DIPADATKAN
JANGAN DIPADATKAN
SPILLED WITHOUT COMPACTED
NO COMPACTION!
Coal Mined Out
Hanging Coal??
Clean up spot coal on floor to maximize coal recovery
Coal Mined Out
Spot coal on Floor
Jangan meninggalkan floor dengan keadaan seperti dalam gambar, keep all coal body mined out.
Survey Pick Up
Floor Seam X Floor Seam Y
Roof Seam X
Dirty Coal
Over Dig Æ coal loose Æ penalty Pick up dirty coal / oxidize joint survey with client, to calculate quantity Æ Sign off
NB : Generally coal loose often occurred in this case Occurred cause of top coal face not clean up perfectly, or covered by bund wall
Survey must be pick up all coal face such us, roof, floor, parting, dirty coal before coal stocking and loading M k sure that Make th t coall supervisor i kknown th thatt coall h have b been pick i k up Dirty Coal pick up must be communicate with geos & client for sign off
Parting/interburden seam Y
Coal Mine Process
Coal Expose Drainage, bund wall, no material on top, etc
Clean Up
Coal Base
Top coal, roof, remove contamination
Use grader / small dozer, keep clean
Coal Getting & Stocking
Survey Pick Up
Use PC 400, Clean track from mud, stock all expose if possible
Roof, floor, parting, dirty coal, top face
Loading Coal Mined out Sign Off TCI – TSA (If any problem)
Form Loading Coal Checklist
Keep clean floor, no hanging coal, no over dig
Use PC400, load to ttruck, k don’t d ’t compact, t just spilled on vessel
PT TSA - FKP
Sign Off Join Pit Inspection
IN PIT JOIN COAL INSPECTION IN PIT JOIN COAL INSPECTION Date Inspection
:
Time
:
Location
: PIT MELAMUK / LISAT
Ispected by
: PT Thiess Contractors Indonesia
NO.
1
2
3
4
PT TSA - FKP (Bayan Group)
1
1
2
2
3
3
COAL TYPE
SEAM
BLOCK
Qty. (Tonnes)
REMARKS
DIRTY COAL
OXIDIZE COAL
BURN COAL
OTHER
TOTAL
According to join Inspection within PT Thiess Contractors Indonesia and Client PT TSA - FKP Bayan Group : Coal will be : dump / continue expose / stocking with total quantity
as Coal Resource / Overburden / Loose Coal
tonnes / bcm .
Comments:
Signature PT. Thiess Contractors Indonesia 1 Name : Title :
PT TSA - FKP (Bayan Group) 1 Name : Title :
Coal Loading & Hauling Checklist
COAL LOADING & HAULING CHECKLIST A. SHIFT : DAY / NIGHT NO
COAL LOADING SEAM
BLOCK
DATE: _____________________ QTY (Tonnes)
DUMPING
COAL TYPE CLEAN
REMARKS
TO
DIRTY
TOTAL SEMUA JAWABAN "NO" HARUS DITINDAKLANJUTI DAN DIJELASKAN DIBAGIAN PENJELASAN (REMARKS) COAL GETTING AREA
1
Apakah Roof Batubara sudah di cleaning dengan sempurna sehingga tidak ada pengotor pada lapisan batubara?
2
Apakah proses cleaning dilakukan dengan coal bucket excavator?
3
Apakah operator excavator mengetahui / berpengalaman dalam hal melakukan pekerjaan cleaning dan coal getting?
4
Apakah batubara di gali sampai floor?
5
Apakah bagian floor dibersihkan secara sempurna sehingga tidak ada spot batubara yang masih menempel pada bagian floor?
6
Apakah pengotor / dilusi di pisahkan pada tempat tertentu?
7
Apakah tidak terjadi pengotoran batubara oleh faktor lain?
8
Apakah sistem drainase di sekitar ekpose coal cukup baik?
9
Apakah Coal Face (Permukaan batubara bagian atas) sudah dibersihkan dengan sempurna dari pengotor / OB
COAL LOADING
1
Apakah lantai permukaan loading point rata dan posisi yang benar?
2
Apakan permukaan stocking batubara sudah dibersihkan dari lumpur / air yang dapat mengotori batubara dengan
3
Apakah Excavator memuat batubara dengan cara yang benar ke dalam truck?
4 5
Apakah pemuatan batubara mengisi penuh ke dalam bak truck dengan cara ditumpahkan rata dan tidak dipadatkan? Apakah tersedia penerangan yang memadai dan di tempatkan pada tempat yang tidak menyilaukan mata operator?
6
A k h check Apakah h k er batubara b t b sudah d hb berada d di ttempatt d dan cukup k untuk t kb beberapa b lloading di point? i t?
YES
NO
YES
NO
dozer atau alat lain?
TINDAKAN PERBAIKAN ITEM
ACTION / TINDAKAN YANG DILAKUKAN
CARRIED OUT BY
DATE COMPLETED
SIGNED
CATATAN: Semua Tindak an Yang Belum Selesai Harus Diterusk an Kepada Supervisor Selanjutnya
DIINSPEKSI OLEH (COAL SUPERVISOR)
DIPERIKSA OLEH (MINING SUPERINTEDENT)
Name : _______________________________
Name : __________________________
Title
Title
: _______________________________
Sign : _______________________________
: __________________________
Sign : __________________________
Monthly Coal Recovery & Reconciliation LISAT COAL RECOVERY Coal Recovery (%) Month in Financial Year Infomine (mt) Survey (mt) Geological Model (mt) Variance model vs Survey Recovery
Jan‐09
41.093 48.739 40.759 48.149 ‐ 48.739 7.390 #DIV/0! 84 65% 84,65%
Month in Financial Year Weighed vs Survey Model vs Survey
Feb‐09
Jan‐09 ‐ ‐
Feb‐09 1,01 1,18
Mar‐09 Apr‐09 Mei‐09 Jun‐09
Jul‐09 Agust‐09 Sep‐09 Okt‐09 Nop‐09 Des‐09
16.200 18.523 20.546 2.023 ‐ ‐ ‐ ‐ ‐ 90 15% #DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0! 90,15%
Mar‐09 Apr‐09 Mei‐09 Jun‐09 0,87 1,11
‐ ‐ ‐ #DIV/0! #DIV/0! #DIV/0!
Jul‐09 Agust‐09 Sep‐09 Okt‐09 Nop‐09 Des‐09
#DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0!
#DIV/0! #DIV/0!
#DIV/0! #DIV/0! #DIV/0! #DIV/0!
Weighed vs Survey vs Model
41.093 40.759 48.149
40.000
48.739
Jan‐09
Feb‐09
30.000 20.000
16.200 18.523 20.546 6
Quaantity (Tonnes)
60.000 50.000
10.000 ‐
Mar‐09
Apr‐09
Mei‐09
Jun‐09
Jul‐09
Agust‐09 Sep‐09
Production Period Weighed
Survey
Model
‐ #DIV/0!
Okt‐09
Nop‐09
Des‐09
#DIV/0! #DIV/0!
#DIV/0! #DIV/0!
thank you
Any Comments?
La Ode Sapta A. Sn. Geologist
Thiess Contractors Indonesia Melak Mine Project
