Search U.S. government technical reports digitized or harvested by TRAIL.
Stop, look and listen! :the roof is going to fall
How are men killed in mines by falls of roof and coal?
Area of unsupported roof in coal mines :conditions and factor[s] for consideration
Methods and costs of mining at Hartley-Grantham mine, Tri-State zinc and lead district
Factors governing the selection of the proper level interval in underground mines
Milling methods and costs at the Hillside Fluorspar mines, Rosiclare, Ill.
Mining and technology graduates and their problems
Factors and conditions that aid in alinement of pillar extraction lines in coal mining
The design of small wooden head frames
Strategic minerals investigations :procedure followed by the Bureau of Mines
Methods of excavation and roof support used in some recently constructed tunnels
Raising with a suspended work cage at the Irene Shaft, Leadville, Colo.
Industrial engineering practice at selected metal mines in western states
Yieldable steel arches and yieldable steel ring supports in metal mines
Mine subsidence--extent and cost of control in a selected area.
Building stoppings in mines with large openings
Ground support systems in block-cave mining :a survey
Hydraulic sandfill in deep metal mines,
Pumped-slurry backfilling of inaccessible mine workings for subsidence control
Advancing coal mining technology research, development, and demonstration in fiscal year 1977
Moving longwall shield supports at the York Canyon mine, Raton, N. Mex.
Comparative shortwall and room-and-pillar mining costs
Mechanized longwall mining :a review emphasizing foreign technology
Multivariate analysis techniques with application in mining
Three potential longwall mining methods for thick coal seams in the western United States