Mining and Rock Mechanics Research in Oil Shale and Nahcolite, Horse Draw Shaft, Colorado. Volume 1. Geotechnical Information.
Horse Draw Mine, a facility owned by the U.S. Bureau of Mines, provides subsurface access to the nahcolite, dawnsonite, and saline oil shale deposits in the Parachute Creek member of the Green River Formation. The Bureau of Mines and the Bureau of Land Management entered into an agreement with the Multi Mineral Corp. (MMC) for a research program to be conducted by MMC at the facility to obtain mining, environmental, and geotechnical test data and bulk samples of the nahcolite, dawsonite, and oil shale. An extensive research program of core drilling, geology, rock mechanics, ventilation, and drilling and blasting tests was conducted. Processing studies included crushing, photosorting, heavy media separation, and flotation. The work is reported in detail in this seven-volume report. Volume 1 comprises geotechnical information. Research done under Memorandum of Agreement MOA14-09-0070-799.