Search U.S. government technical reports digitized or harvested by TRAIL.
Safe mechanical equipment for use in shaft sinking
Shaft sinking at the Morton Salt Co. mine at Grand Saline, Texas
Shaft sinking by rotary drilling
Sinking large-diameter drill holes, Lake Superior district underground iron mines
Methods and costs of sinking a 2-1/2-compartment shaft at the Hope Mine, Clark Fork, Idaho
Use of prestressed precast shaft supports, Banner Mine, Lordsburg, N. Mex.
Methods and costs of sinking a circular concrete-lined ventilation shaft
Methods and costs of shaft sinking in the Coeur d'Alene District, Shoshone County, Idaho
Safety practices in shaft sinking and tunneling :West Delaware aqueduct
In situ measurements and preliminary design analysis for deep mine shafts in highly stressed rock