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More Mining Engineering Questions
Which of the following controls the magnitude and direction of the front abutment pressure for immediate roof in long wall working?
The minimum pillar to pillar distance, if the depth of seam is 250 m and gallery width is 4.2 m.
Gradients of roads in quarries for tyred vehicular traffic should not exceed . . . . . . . .
The departure is considered as negative when the projection is towards the . . . . . . . .
The back bearing of a line is 22°, its fore bearing is . . . . . . . .