Mining or in situ disintegration of hard material – Tunnel recovery of fluid material
Patent
1980-02-01
1981-08-25
Purser, Ernest R.
Mining or in situ disintegration of hard material
Tunnel recovery of fluid material
166259, E21C 4300
Patent
active
042855470
ABSTRACT:
A method for the in situ processing of mineral-bearing oil shale ore includes the establishment of a plurality of underground stopes by removing from each a portion of the oil shale ore therein, rubblizing the remaining ore in each stope, extracting the rubblized ore and crushing it to obtain a nahcolite fraction and an oil shale fraction having a desired particle size for subsequent processing, and restoring sized oil shale particles to the stope by back filling the stope as the rubble is extracted so as to maintain the stope substantially filled with particles to provide lateral support to the side walls and reduce the likelihood of caving in the stope. The nahcolite fraction is recovered from the crushed ore prior to backfilling of the stopes for retorting to recover shale oil, while soda ash and alumina may be recovered from the spent shale by leaching the stopes after retorting. A method of retorting is also disclosed in which three retorts are operated in series, the first retort comprising a gas heating retort, the second a carbon recovery retort and the third an active retort.
REFERENCES:
patent: 2481051 (1949-09-01), Uren
patent: 3001776 (1961-09-01), Van Poollen
patent: 3316020 (1967-04-01), Bergstrom
patent: 3586377 (1971-06-01), Ellington
patent: 3821353 (1974-06-01), Weichman
patent: 3994343 (1976-11-01), Cha et al.
patent: 4005752 (1977-02-01), Cha
patent: 4043598 (1977-08-01), French et al.
patent: 4082645 (1978-04-01), Knight et al.
patent: 4105072 (1978-08-01), Cha
patent: 4140181 (1979-02-01), Ridley et al.
Multi Mineral Corporation
Purser Ernest R.
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