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More Mining Engineering Questions
An underground panel extracted in a coal mine has a strike length of 500 m. After subsidence survey, it was found that the length of a straight line between the extreme limits of the subsided area on surface is 593.2 m along the strike direction. The depth of the extracted panel from the surface is 100 m. The angle of draw for the overlying strata assuming identical subsidence on either side of the centre of the panel is
The ratio at which the cost of open cast mining equals that of under ground mining is
As per Mine Rules 1955 every shelter shall have a floor area of not less than:
Which mining method is typically used in thick, steeply dipping ore bodies with competent rock?
Which among the following is the fastest method of survey . . . . . . . .