Mining or in situ disintegration of hard material – Processes
Patent
1988-09-09
1989-11-07
Massie, Jerome W.
Mining or in situ disintegration of hard material
Processes
299 17, F21C 2560, E21C 4100
Patent
active
048787124
ABSTRACT:
Coal is mined using water jets to a remove a layer of thin horizontal slices of coal. The thickness of the layer is sufficiently small that elastic deformation of the roof of the layer due to settling will cause the roof to rest against the floor of the layer. A number of additional layers of slices are then extracted in the same manner, each immediately below the floor of the preceding layer. The thickness and location of these layers wiht respect to previous layers is such that elastic deformation of the roof of the first layer due to settling will cause the roof to rest against the floor of the last layer of slices. Through the sequential mining of layers in this manner from top to bottom, the entire seam of coal is extracted and the mine roof rests upon the mine floor without the need for artificial roof support.
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patent: 4079999 (1978-03-01), Grimley
patent: 4479541 (1984-10-01), Wang
patent: 4496191 (1985-01-01), Choi et al.
Elements of Hydraulic Coal Mine Design, M. L. Heremic, Trans. Tech. Publications, 1982, TN803.J47, pp. 9-23, 62-104.
"Status of Hydraulic coal Mining in People's Republic of China", Fun Den Wang, Colorado School of Mines, 9-1987.
"Hydraulic Mining of Thick and Steep Coal Seams in the Soviet Union" by Vladimir M. Kolesnikov, Deputy Tech. Dir., Gidrougol Coal Prod. Assoc., Soviet Un. (May 1980).
"History of Hydraulic Mining at Kaiser" by D. M. Parkes, Manager, New Mines Develop Kaiser Resources LTD., Vancouver, British Columbia, Canada, May, 1980.
"Introduction to Hydraulic Mining and Jet Cutting" by Jacob N. Frank, Energy Research & Development Administration, U.S.A., May, 1976.
Bagnell David J.
Massie Jerome W.
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