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More Mining Engineering Questions
Which mining method uses downward retreat of the ore body while filling the voids with waste or tailings?
It is estimated that in coal mine nearly . . . . . . . . te of air to a sent down in a mine for every te of coal raise.
Stand by ventilation is required . . . . . . . . as per dams Gr 42 of 1972.
The method employed, if the ore body is strong, moderately thick, flat dipping.
If the strength of the roof is weak, unsupported, ore is massive and steep, the method employed is . . . . . . . .