Introduction To Mining Engineering - Study Mode
[#76] In Khaskaranpura, the cutting of narrow drivages with the help of coal picks is known as
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(C) mul cutting
[#77] In the above question. the safety factor of the pillar is
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(D) 1.7
[#78] Use of oxyacetylene flame wielding/cutting can be done in 3 rd degree gassy mine, if
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(D) permitted in writing by Director of Mine Safety
[#79] Maximum number of faces available for working in a shift in a 5 heading bord and pillar development district is
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(B) 12
[#80] In Bord & Pillar panels worked in conjunction with hydraulic stowing, extract line preferred is
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(A) Step diagonal