Mining or in situ disintegration of hard material – Tunnel recovery of fluid material
Patent
1976-03-25
1977-04-12
Novosad, Stephen J.
Mining or in situ disintegration of hard material
Tunnel recovery of fluid material
102 23, 299 4, 299 13, E21B 4326, E21C 4110
Patent
active
040171191
ABSTRACT:
A method for rubblizing an oil shale deposit that has been formed in alternate horizontal layers of rich and lean shale, including the steps of driving a horizontal tunnel along the lower edge of a rich shale layer of the deposit, sublevel caving by fan drilling and blasting of both rich and lean overlying shale layers at the distal end of the tunnel to rubblize the layers, removing a substantial amount of the accessible rubblized rich shale to permit the overlying rubblized lean shale to drop to tunnel floor level to form a column of lean shale, performing additional sublevel caving of rich and lean shale towards the proximate end of the tunnel, removal of a substantial amount of the additionally rubblized rich shale to allow the overlying rubblized lean shale to drop to tunnel floor level to form another column of rubblized lean shale, similarly performing additional steps of sublevel caving and removal of rich rubble to form additional columns of lean shale rubble in the rich shale rubble in the tunnel, and driving additional horizontal tunnels in the deposit and similarly rubblizing the overlying layers of rich and lean shale and forming columns of rubblized lean shale in the rich, thereby forming an in situ oil shale retort having zones of lean shale that remain permeable to hot retorting fluids in the presence of high rubble pile pressures and high retorting temperatures.
REFERENCES:
patent: 3316020 (1967-04-01), Bergstrom
patent: 3434757 (1969-03-01), Prats
patent: 3460867 (1969-08-01), Cameron et al.
patent: 3537753 (1970-11-01), Arendt
patent: 3917346 (1975-11-01), Janssen
patent: 3917348 (1975-11-01), Janssen
Carlson Dean E.
Clouse Clifton E.
Gaither Roger S.
Novosad Stephen J.
The United States of America as represented by the United States
LandOfFree
Method for rubblizing an oil shale deposit for in situ retorting does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for rubblizing an oil shale deposit for in situ retorting, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for rubblizing an oil shale deposit for in situ retorting will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1277742