1) What do machines do in Continuous Mining? a) Build walls b) Cut coal from walls c) Remove pillars d) Clean coal 2) In the Room and Pillar Method, what do miners do with coal? a) Cut it completely b) Wash it c) Leave coal in pillar shapes to hold the roof d) Remove all pillars 3) What happens in Retreat Mining? a) Miners build new walls b) Miners remove pillars when leaving c) Miners only cut coal d) Miners blend different types of coal 4) What does Auger Mining use? a) Big machines b) Big drills c) Long walls d) Gravity 5) What is the purpose of a Wash Plant? a) To create pillars b) To cut coal c) To clean coal before shipping d) To blend different coals 6) What does Gravitational Separation do? a) Cut coal b) Sort coal using gravity c) Build mining walls d) Remove pillars 7) What does Coal Blending do? a) Cut coal b) Clean coal c) Mix different types of coal d) Hold roof structures

Coal Mining Techniques

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