Search U.S. government technical reports digitized or harvested by TRAIL.
Shaft sinking at the Sevier Valley Coal Co. mine
What the coal miners can do to prevent injury from falls of roof
Mining bituminous coal by stripping methods
A study of falls of roof and coal in mines in the number 8 field of eastern Ohio
A study of falls of roof and coal in mines of Harrison County, West Virginia
How to prevent death and injury from falls of roof in coal mines
Timber withdrawing and devices used for this purpose in some coal mines
An international viewpoint on safeguarding electrical equipment used in gassy mines
Competitive conditions in the international coal trade
Hazard of igniting coal by electric circuits in mines
Shaft- and slope-bottom lay-outs at coal mines
The importance of adequate voltage for distribution systems in coal mines
Truck vs. rail haulage in bituminous-coal strip mines
Coal-mine explosives :their characteristics, selection and safe use
Studies of roof movement in coal mines.
Some phases of haulage accident prevention in anthracite mines
Multiple-shift mechanical mining in some bituminous coal mines.