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More Mining Engineering Questions
A person appointed to superintend the rising and lowering of persons, tools and materials, transmit signals at any inset or shaft bottom . . . . . . . .
Filling up of the void in opencast mines is known as
When the thickness of immediate roof is more than A m then it becomes stronger and behaves like a main roof? A is given by
When the parting between the seams thicker than . . . . . . . . meters it is not necessary to insist on simultaneous pillar extraction.
It is a subordinate method combining features of both room and pillar and long wall.