Mining or in situ disintegration of hard material – Tunnel recovery of fluid material
Patent
1977-07-15
1978-08-15
Novosad, Stephen J.
Mining or in situ disintegration of hard material
Tunnel recovery of fluid material
299 13, 102 23, E21B 4324, E21B 4326, E21C 4110
Patent
active
041068149
ABSTRACT:
A row of horizontally spaced apart in situ oil shale retorts is formed in a subterranean formation containing oil shale. Each row is formed by excavating at least a pair of upper and lower retort access drifts at elevations within the top and bottom boundaries of the retort sites. The access drifts extend through opposite side boundaries of a plurality of retorts in such row. Each retort is formed by excavating upper and lower horizontal voids at the levels of the upper and lower right access drifts, respectively, such voids being excavated laterally from the access drift within the side boundaries of the retort sites. Each retort is formed by explosively expanding formation toward the upper and lower voids within the boundaries of the retort site to form a fragmented permeable mass of particles containing oil shale in each retort. Following formation of each retort, the retort access drifts on the advancing side of the retort are at least partially sealed, preferably with a mass of formation particles covered by a gas impermeable layer and backfilled with a further mass of formation particles.
REFERENCES:
patent: 3001776 (1961-09-01), Van Poollen
patent: 3434757 (1969-03-01), Prats
patent: 3661423 (1972-05-01), Garrett
patent: 3765722 (1973-10-01), Crumb
patent: 3897107 (1975-07-01), Haglund
patent: 3917346 (1975-11-01), Janssen
patent: 3950029 (1976-04-01), Timmins
patent: 4025115 (1977-05-01), French et al.
patent: 4043596 (1977-08-01), Ridley
patent: 4043597 (1977-08-01), French
patent: 4043598 (1977-08-01), French et al.
Novosad Stephen J.
Occidental Oil Shale Inc.
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