Coal Mining - Study Mode
[#271] Maximum roof exposure for caving is
Correct Answer
(A) 60 - 90m 2
[#272] Horizontal slicing method applied if seam thickness is
Correct Answer
(A) More than 15m
[#273] The type of sinking employed in unstable friable strata with heavy rush of water
Correct Answer
(B) Freezing
[#274] Seam thickness more than 8m and regular dip <60°, strong roof and floor, no self heating with easily cavable roof. Select best method.
Correct Answer
(D) Inclined slicing in ascending order
[#275] The cut coal is loaded by . . . . . . . . In case of shear.
Correct Answer
(B) Dozer ptate