Quiz - Mining ENGINEERING [Open2Study]

Why is geological mapping an efective exploration technique?  Your  Y our answer: Mineral

deposits are oten associated with distinct geological

environments  That’s right. Certain types o minerals orm in particular geological environments and these environments can !e recognised !y patterns and eatures in roc"s a long way rom an actual ore deposit.

What is the primary tas" o a Mining #ngineer?  Your  Y our answer: $esign

and operate mines or the sae e%cient and economical

extraction o minerals  That’s right. The primary tas" o Mining #ngineers is to design and operate mines in an efective manner manner.. &ll other things !eing equal the economic via!ility o a mineral deposit is li"ely to !e increased !y which o the ollowing?  Technological echnological  Your  Y our answer: T

innovations in mineral handling hand ling and processing

'eing a!le to produce a commodity or a lower unit cost ma"es its exploitation more economically via!le. Which o the ollowing is ()T a responsi!ility o the Mining #ngineer?  Your  Y our answer: *inding

the mineral deposit

 +es  + es the wor" o the mining engineer is ocused on getting the deposit out o the ground once geologists have de,ned it. -ossi!le mining impacts on the natural environment do ()T include impacts on  Your  Y our answer: Cultural

heritage

 +es  + es cultural heritage is not a part o the natural environment and thereore does not have an impact on mining. Which o the ollowing is ()T a reason or coal !ene,ciation?  Your  Y our answer: /ncreasing

product density

 That’s correct. We We do coal !ene,ciation to reduce the concentration concentration o mineral matter which reduces the transport costs and improves thermal e%ciency. e%ciency. / we were to increase the product density all that would do in increase the transport costs. /n actual

act coal is a low density product so as we remove the gangue mineral matter we are actually decreasing the density. What is the purpose o the chemical reagents called 0collectors1?  Your answer: To

ma"e particles hydropho!ic

Correct. )nce the particles !ecome hydropho!ic they can then attach to air !u!!les and !e separated rom the hydrophilic particles.

Module 2

What is surace mining?  Your answer: The

exploitation o the deposits that is exposed to the atmosphere or

outcropping to the surace and extending to shallow depths Correct3 4urace mining is the extraction o mineral deposits lying only on the surace. /t does not include the deposits extending to shallow depths that are still included in surace mining. Which o the ollowing is ()T well suited to surace mining?  Your answer: &

small rich ore !ody o lead and silver at great depth

4mall rich ore !odies at depth are good targets or underground mining as they can exploit most o the ore with minimal removal o waste roc". What is the roc" mass a!ove a deposit located at a certain shallow depth rom the surace "nown as?  Your answer: )ver!urden

/ the deposit is not outcropping on the surace !ut is located at a certain shallow depth rom the ground surace the roc" mass covering top the ore !ody is called over!urden. Which are the main aspects that should !e considered in the geotechnical model de,nition?  Your answer: 5eology

structure roc" mass and hydrology

 The de,nition o the geotechnical model involves a good understanding o the geological setting o the area where the open pit is going to !e mined. &s well as this a

proper description o the roc" mass structure o the area and the properties o the material in which the slope is going to !e excavated. What is the *actor o 4aety?  Your answer: The

ratio o the resisting orces over the driving 6or acting7 orces on the

slope 5reat3 the *actor o 4aety represents how much resistance the structure8slope has compared to the desta!ili9ing actions 6eg. gravity or water pressure7. Which o the ollowing !est descri!es a 0waste dump1?  Your answer: The

area in which a surace mining operation can dispose o low grade

and 8or over!urden material that has !een removed rom the pit to expose higher grades material  The area in which a surace mining operation can dispose o low grade and 8or !arren material that has !een removed rom the pit to expose higher grades material is called a waste dump or spoil dump or spoil pile. Which o the statements !elow is correct?  Your answer: 'lasting

is more controlla!le i an initiation sequence including a delay is

used Correct3 $elaying the sequence o !lasts helps controlling the !last and in particular the level o vi!rations. What conditions are draglines !est suited to?  Your answer: *lat

ta!ular shallow dipping deposits

Correct. $raglines are used or mining operation with a relatively ta!ular or shallow: dipping coal seam. Who is responsi!le or the saety management in a surace mine?  Your answer: The

mine operator

 That’s correct. The mine operator has to ensure the saety o the mine site to provide a sae wor" environment or all employees Why do underground mining operations oten ollow ater open pit mining?  Your answer: With

increasing depth surace mining !ecomes less e%cient and

underground mining eventually !ecomes more economical  The !attered pit slopes required or sta!ility mean that the ratio o waste roc" moved to the ore recovered increases as surace mining gets deeper.

;nderground mining methods are  Your answer: &dapta!le

to ore !odies o any si9e and orientation at any depth

;nderground mining o any ore !ody is possi!le !ut the economic via!ility reduces as the proportion o waste roc" increases and8or the grade o the ore decreases. -ermanent access structures 6e.g. shats and declines7 or underground mines are  Your answer: 5enerally

located outside the deposit so that they do not sterili9e

portions o the deposit  +es it does not ma"e sense to put permanent eatures in roc" you want to mine. Which o the ollowing terms does not reer to a type o stope?  Your answer: -illar

 +es a pillar is not a stope !ecause a stope is an underground opening.  Your answer: The

!ehavior that when intact roc" is !ro"en up the volume it occupies

increases ma"ing the space around it appear to shrin" Well done. / you "eep !rea"ing up new roc" in an underground mine without removing some o the roc" you produce the space in the mine will shrin". Which o the ollowing is an advantage o cave mining?  Your answer: There

is less ore remaining in pillars

 +es with cave mining less ore is let in the ground. #lectrical saety in coal mines is ()T increased !y which o the ollowing?  Your answer: ;sing

!ig !atteries instead o live wires

Correct. #ven a digital watch carries a small ris" o generating a spar" and thereore using !ig !atteries will not increase electrical saety in a coal mine. Which approach cannot !e used to control the roc"all ha9ard due to loose ragments?  Your answer: -ropping

o loose ragments

Well done.