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More Mining Engineering Questions
For what depth of coal seam from surface, the distance between centers of adjacent pillars shall not be less than 45 m for a gallery width of maximum 4.8 m?
In a gallery of 4.2 m width and 2.1 m height and 1 m depth, sp.gr. of coal is 11; the coal available for blast is for four rounds of solid blasting.
The FB of a line AB is 55° and the BB of BC is 342°. The included angle ABC is
In longwall face cut by double back shuffle, can be only worked with
The rocker shovel equipment, the power source in Indian mining practice is