Search U.S. government technical reports digitized or harvested by TRAIL.
Guarding trolley wires in mines
Notes pertaining to safety inspections of permissible electric mine equipment
Data in reference to installation of cables in shafts and boreholes
Maintenance of electrical mine equipment from the viewpoint of the safety inspector
Electrical viewpoint in a complete safety survey of a coal mine
The importance of adequate voltage for distribution systems in coal mines
Coal-mine fires of electrical origin :their cause and prevention
Installation of high-tension power circuits in coal mines
Reducing "nipping" hazards when tramming coal-mining machinery