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More Mining Engineering Questions
In contiguous seam working, the 2 seams must be within A m of each other. A is given by
Critical temperature of CH 4 .
The ventilation of drives exceeding 50 m length to be such as to dilute the nitrous fumes produced by blasting to . . . . . . . . and CO to . . . . . . . . within a period of . . . . . . . . min in long tunnel.
What should be the speed of air current when the wet bulb temperature exceeds 30.5°C?
The working in a mine where work has been temporarily stopped, but which are accessible and include unused working called