Browse TRAIL Inventories

Studies of roof movement in coal mines.

Studies of roof movement in coal mines.

Underground transportation of coal :progress report [No.] 2

An analysis of the use of electricity at coal mines.

Use of salts to allay dust on shuttle-car roadways in coal mines

Control of roof and prevention of accidents from falls of rock and coal :suggested roof supports for use at faces in conjunction with mechanical loading

Suspension roof support.


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