Mine Development And Mining Methods - Study Mode

[#101] Which method is best for mining ore bodies that dip at shallow angles?
Correct Answer

(A) Room and pillar

Explanation

Solution: Room and pillar is suited for shallow-dipping or flat ore bodies.The correct answer is: Room and pillarEfficient where the seam is uniform and stable.Also used in salt, coal, and potash mining.

[#102] The process of enlarging a shaft or tunnel is called:
Correct Answer

(B) Slashing

Explanation

Solution: Slashing refers to enlarging underground openings.The correct answer is: SlashingUsed to improve access or increase production capability.Different from reaming, which enlarges boreholes.

[#103] Which method uses gravity flow of ore and caved waste rock?
Correct Answer

(B) Sublevel caving

Explanation

Solution: Sublevel caving allows ore and waste to cave and flow due to gravity.The correct answer is: Sublevel cavingDrilled and blasted from sublevels below.Used for massive, weak ore bodies.

[#104] What is the main challenge with room and pillar mining?
Correct Answer

(A) Ore loss in pillars

Explanation

Solution: Room and pillar mining leaves behind supporting pillars.The correct answer is: Ore loss in pillarsPillars cannot always be recovered, causing unrecoverable reserves.Design optimization helps balance recovery and safety.

[#105] Which parameter indicates the difficulty of shaft sinking in water-bearing formations?
Correct Answer

(C) Hydrostatic pressure

Explanation

Solution: Hydrostatic pressure reflects the pressure exerted by groundwater.The correct answer is: Hydrostatic pressureIt can cause water inflow during sinking, requiring dewatering or ground freezing.Important in selecting lining and sinking method.