Mine Development And Mining Methods - Study Mode

[#156] Which underground transport equipment operates best on steep gradients?
Correct Answer

(C) LHDs (Load-Haul-Dump)

Explanation

Solution: LHDs are versatile and maneuverable, ideal for steep or winding drives.The correct answer is: LHDs (Load-Haul-Dump)They are diesel or electric powered and work efficiently in ramps.Rail and belts are limited on gradients.

[#157] What is the purpose of pre-splitting in underground development?
Correct Answer

(C) Controlled wall breakage

Explanation

Solution: Pre-splitting involves drilling closely spaced holes along the boundary of excavation.The correct answer is: Controlled wall breakageIt reduces overbreak and maintains stable tunnel walls.Used before main blasting.

[#158] What does "face advance" refer to in tunneling?
Correct Answer

(C) Distance the tunnel front progresses

Explanation

Solution: Face advance is the measure of how far the tunnel is extended after each blast or round.The correct answer is: Distance the tunnel front progressesIt's an indicator of development rate and efficiency.Typically measured in meters/day.

[#159] In development headings, what is typically installed immediately after blasting and scaling?
Correct Answer

(C) Ground support system

Explanation

Solution: Ground support system like rock bolts or mesh is applied right after cleaning.The correct answer is: Ground support systemThis ensures worker safety and tunnel stability.Other installations follow once safety is ensured.

[#160] Which of the following is the main advantage of using a decline ramp over a vertical shaft?
Correct Answer

(D) Continuous vehicular access

Explanation

Solution: Decline ramps allow trucks and equipment to access the ore body without hoisting.The correct answer is: Continuous vehicular accessThis is ideal for shallow to medium-depth deposits.Shafts are more efficient for very deep mining.