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Mining Operations Quiz

Test your knowledge of mining operations with this quiz that covers key factors such as ore body characteristics, constraints, and the prime objective of maximizing return on investment. Delve into comparisons of surface mining methods and discover the two prime objectives of mine planning.

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Questions and Answers

What is the prime objective of any mining project?

To maximize the return on investment

What must be considered in a comparison of surface mining methods?

Developing the most economic plan for the overall project

What makes each mining operation unique?

Ore body location, size, and grade

What is included in the admission for CIM Sudbury Student Night?

<p>2 drink tickets, pizza and chicken wings</p> Signup and view all the answers

What is the reduced student membership fee for CIM Sudbury events?

<p>$15 (from $35)</p> Signup and view all the answers

What is the purpose of the bus provided for transportation by CIM Sudbury?

<p>Transportation to the event location</p> Signup and view all the answers

What is the main focus of the course ENGR 2106 Fall 2023 Lec10 Surface Mining II?

<p>Surface mining methods</p> Signup and view all the answers

Which method of mining involves the use of water or liquid solvent to recover minerals from the earth?

<p>Dredging</p> Signup and view all the answers

What is the primary crusher crucial for in In-Pit Crushing and Conveying (IPCC) systems?

<p>Ensuring cost efficiencies</p> Signup and view all the answers

In surface mining, what is the main purpose of haul roads and ramps?

<p>Creation of access for transportation</p> Signup and view all the answers

What is a characteristic of medium to hard rock mining without blasting?

<p>Crushing the rock during the cutting process</p> Signup and view all the answers

When is In-Pit Crushing and Conveying (IPCC) used?

<p>When system capacities increase</p> Signup and view all the answers

What is a common feature of open-pit and strip (open-cast) mining?

<p>Mechanical extraction methods</p> Signup and view all the answers

What is the primary characteristic of high-wall mining?

<p>Involves mining coal from exposed seams on the high walls of open pits</p> Signup and view all the answers

In surface mining, what is the purpose of in-situ leaching?

<p>To recover minerals by dissolving them in place</p> Signup and view all the answers

What is the primary purpose of auger mining?

<p>To recover coal beyond highwall limits</p> Signup and view all the answers

What is a disadvantage of auger mining?

<p>Leaving about 65% of the coal reserve in place</p> Signup and view all the answers

What is the primary advantage of highwall mining over auger mining?

<p>Recovering around 50% of the coal under the highwall</p> Signup and view all the answers

What equipment is used in continuous mining systems?

<p>Bucket Wheel Excavators (BWE), Bucket Chain Excavators (BCE), and Belt Conveyors</p> Signup and view all the answers

What is the function of surface miners in mining operations?

<p>Loosen rock, crush it, and load it onto the transportation system</p> Signup and view all the answers

What is a potential issue associated with auger mining?

<p>Creating drainage holes for acid-laden water</p> Signup and view all the answers

What is the depth to which auger cutting heads can be drilled?

<p>More than 90m</p> Signup and view all the answers

What is a common element between highwall mining and continuous mining machine?

<p>Both are used to recover coal under the highwall</p> Signup and view all the answers

What is a disadvantage of highwall mining?

<p>Facing surface subsidence and spontaneous combustion in the auger holes</p> Signup and view all the answers

What is the primary function of continuous mining systems?

<p>To quickly remove overburden</p> Signup and view all the answers

What is the primary function of highwall and auger mining?

<p>Determining hole width, web pillar width, coal left in place between holes, barrier pillar width, and the number of holes between barrier pillars</p> Signup and view all the answers

What is the purpose of surface miners in coal recovery?

<p>Loosen rock, crush it, and load it onto the transportation system</p> Signup and view all the answers

What is the date for the CIM Sudbury Student Night event?

<p>Thu Oct 19</p> Signup and view all the answers

What is the reduced student membership fee for CIM Sudbury events?

<p>$15</p> Signup and view all the answers

What is included in the admission for CIM Sudbury Student Night?

<p>2 drink tickets, pizza, and chicken wings</p> Signup and view all the answers

What is the purpose of Auger mining?

<p>Recover coal seams under the highwall</p> Signup and view all the answers

What is the primary purpose of In-Pit Crushing and Conveying (IPCC) systems?

<p>To increase haulage distances and system capacities</p> Signup and view all the answers

What is the main characteristic of high-wall mining?

<p>It is a mechanical extraction method</p> Signup and view all the answers

What is the common feature of open-pit and strip (open-cast) mining?

<p>They both involve the creation of haul roads and ramps</p> Signup and view all the answers

When is In-Pit Crushing and Conveying (IPCC) used?

<p>When there is a need to increase haulage distances and system capacities</p> Signup and view all the answers

What is the primary focus of Aqueous extraction methods in surface mining?

<p>To recover minerals using water or liquid solvent</p> Signup and view all the answers

What is the main characteristic of medium to hard rock mining without blasting?

<p>It involves mining without blasting and loading rock onto trucks directly</p> Signup and view all the answers

What is the primary purpose of haul roads and ramps in surface mining?

<p>To provide efficient transportation for mining operations</p> Signup and view all the answers

What is the main objective of any mining project with In-Pit Crushing and Conveying (IPCC) systems?

<p>To achieve success by using the primary crusher to increase haulage distances and system capacities</p> Signup and view all the answers

What is the primary function of auger mining?

<p>Recovering coal beyond highwall limits</p> Signup and view all the answers

What is a disadvantage of highwall mining?

<p>Leaving about 65% of the coal reserve in place</p> Signup and view all the answers

What equipment is used in continuous mining systems?

<p>Bucket Wheel Excavators (BWE)</p> Signup and view all the answers

What is the primary advantage of highwall mining over auger mining?

<p>Having a higher production rate</p> Signup and view all the answers

What is the primary purpose of highwall and auger mining?

<p>To recover coal beyond highwall limits</p> Signup and view all the answers

What is a potential issue associated with auger mining?

<p>Creating drainage holes for acid-laden water</p> Signup and view all the answers

What is the depth to which auger cutting heads can be drilled?

<p>More than 90m</p> Signup and view all the answers

What is a common element between highwall mining and continuous mining machine?

<p>Sharing common elements</p> Signup and view all the answers

What is the main function of surface miners in mining operations?

<p>Loosening rock, crushing it, and loading it onto the transportation system</p> Signup and view all the answers

When is In-Pit Crushing and Conveying (IPCC) used?

<p>To quickly remove overburden</p> Signup and view all the answers

What must be considered in a comparison of surface mining methods?

<p>Determining hole width</p> Signup and view all the answers

What is the primary purpose of continuous mining systems?

<p>To quickly remove overburden</p> Signup and view all the answers

What is the primary purpose of auger mining?

<p>Recovering coal under the highwall after the economic limit is reached</p> Signup and view all the answers

What is a disadvantage of auger mining?

<p>Creating drainage holes for acid-laden water</p> Signup and view all the answers

What is the depth to which auger cutting heads can be drilled?

<p>200 meters</p> Signup and view all the answers

What percentage of the reserve (coal) remains in place and is difficult to be recovered in auger mining?

<p>65%</p> Signup and view all the answers

What is the primary function of highwall mining?

<p>To recover coal under the highwall using a highwall miner</p> Signup and view all the answers

What is a potential issue associated with auger mining?

<p>Recovering less coal under the highwall compared to highwall mining</p> Signup and view all the answers

What equipment is used in highwall mining?

<p>Highwall miner</p> Signup and view all the answers

When is In-Pit Crushing and Conveying (IPCC) used?

<p>When increasing concerns over greenhouse gas emissions</p> Signup and view all the answers

What is the main function of continuous mining systems?

<p>To remove overburden quickly</p> Signup and view all the answers

What is the primary purpose of In-Pit Crushing and Conveying (IPCC) systems?

<p>To increase haulage distances</p> Signup and view all the answers

What is a common element between highwall mining and continuous mining machine?

<p>Use of remote-control system</p> Signup and view all the answers

What is the primary method used to recover minerals from the earth using water or liquid solvent?

<p>Aqueous extraction</p> Signup and view all the answers

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Study Notes

Coal Recovery Methods in Mining

  • Auger mining is used to recover coal beyond highwall limits after strip mining when economic limit is reached
  • Auger mining involves boring horizontally into the coal seam at the high wall, with the rotating action of the auger cutting and pushing out coal
  • Around one-third of the coal under the highwall can be recovered through auger mining at a low cost
  • Auger cutting heads can be as large as 2m in diameter and drilled to a depth of more than 90m
  • Disadvantages of auger mining include leaving about 65% of the coal reserve in place, creating drainage holes for acid-laden water, and facing surface subsidence and spontaneous combustion in the auger holes
  • Highwall mining is similar to auger mining, but uses different equipment and shares common elements with a continuous mining machine
  • The highwall miner can advance more than 360m under the highwall and recover around 50% of the coal under the highwall
  • The highwall miner's production rate is much higher than auger mining and can be adjusted more easily to varying seam thickness
  • Basic functions for the extraction in highwall and auger mining include determining hole width, web pillar width, coal left in place between holes, barrier pillar width, and the number of holes between barrier pillars
  • Continuous mining systems use equipment such as Bucket Wheel Excavators (BWE), Bucket Chain Excavators (BCE), and Belt Conveyors to quickly remove overburden
  • Surface miners loosen rock, crush it, and load it onto the transportation system
  • These mining methods play a crucial role in coal recovery and have specific advantages and disadvantages that need to be considered in mining operations.

Coal Recovery Methods in Mining

  • Auger mining is used to recover coal beyond highwall limits after strip mining when economic limit is reached
  • Auger mining involves boring horizontally into the coal seam at the high wall, with the rotating action of the auger cutting and pushing out coal
  • Around one-third of the coal under the highwall can be recovered through auger mining at a low cost
  • Auger cutting heads can be as large as 2m in diameter and drilled to a depth of more than 90m
  • Disadvantages of auger mining include leaving about 65% of the coal reserve in place, creating drainage holes for acid-laden water, and facing surface subsidence and spontaneous combustion in the auger holes
  • Highwall mining is similar to auger mining, but uses different equipment and shares common elements with a continuous mining machine
  • The highwall miner can advance more than 360m under the highwall and recover around 50% of the coal under the highwall
  • The highwall miner's production rate is much higher than auger mining and can be adjusted more easily to varying seam thickness
  • Basic functions for the extraction in highwall and auger mining include determining hole width, web pillar width, coal left in place between holes, barrier pillar width, and the number of holes between barrier pillars
  • Continuous mining systems use equipment such as Bucket Wheel Excavators (BWE), Bucket Chain Excavators (BCE), and Belt Conveyors to quickly remove overburden
  • Surface miners loosen rock, crush it, and load it onto the transportation system
  • These mining methods play a crucial role in coal recovery and have specific advantages and disadvantages that need to be considered in mining operations.

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