Mining or in situ disintegration of hard material – Tunnel recovery of fluid material
Patent
1982-01-04
1984-04-10
Novosad, Stephen J.
Mining or in situ disintegration of hard material
Tunnel recovery of fluid material
299 11, 299 13, E21B 43243
Patent
active
044417608
ABSTRACT:
A row of horizontally spaced-apart in situ oil shale retorts is formed in a subterranean formation containing oil shale. Each row of retorts is formed by excavating development drifts at different elevations through opposite side boundaries of a plurality of retorts in the row of retorts. Each retort is formed by explosively expanding formation toward one or more voids within the boundaries of the retort site to form a fragmented permeable mass of formation particles containing oil shale in each retort. Following formation of each retort, the retort development drifts on the advancing side of the retort are closed off by covering formation particles within the development drift with a layer of crushed oil shale particles having a particle size smaller than the average particle size of oil shale particles in the adjacent retort. In one embodiment, the crushed oil shale particles are pneumatically loaded into the development drift to pack the particles tightly all the way to the top of the drift and throughout the entire cross section of the drift. The closure between adjacent retorts provided by the finely divided oil shale provides sufficient resistance to gas flow through the development drift to effectively inhibit gas flow through the drift during subsequent retorting operations.
REFERENCES:
patent: 3465819 (1969-09-01), Dixon
patent: 3478825 (1969-11-01), Closmann
patent: 3500934 (1970-03-01), Magnuson
patent: 3532528 (1970-11-01), Herce
patent: 3583165 (1971-06-01), West
patent: 3620301 (1971-11-01), Nichols
patent: 3817039 (1974-06-01), Stewart et al.
patent: 3927719 (1975-12-01), Maser
patent: 3950029 (1976-04-01), Timmins
patent: 4017119 (1977-04-01), Lewis
patent: 4044563 (1977-08-01), Hurst et al.
patent: 4096912 (1978-06-01), Lewis et al.
patent: 4131416 (1978-12-01), Watson et al.
patent: 4133580 (1979-01-01), French
patent: 4201419 (1980-05-01), Hutchins
patent: 4239284 (1980-12-01), Ridley et al.
patent: 4272127 (1981-06-01), Hutchins et al.
patent: 4315657 (1982-02-01), Burton
"Low Pressure Pneumatic Pipe Line Conveying . . . ", by Radmark.
Neuder William P.
Novosad Stephen J.
Occidental Oil Shale Inc.
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