| Patents for E21C 41 - Methods of underground or surface mining; Layouts therefor (2,789) |
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| 04/08/1986 | US4580725 Hydraulic monitor protection apparatus |
| 04/01/1986 | US4579391 Drilling holes, insertion conductive devices, forming bath of melted material, and separation |
| 03/11/1986 | US4575155 Pressure differential mining tool |
| 02/25/1986 | US4572582 Earth battery using veined material such as coal as first electrode, and placing second electrode in metal to be mined |
| 12/24/1985 | US4560206 Method for explosively expanding a pillar |
| 11/12/1985 | CA1196572A1 Method of electrically heating underground hydrocarbon deposits |
| 11/05/1985 | US4550952 Mining machine with adjustable hood-scoop assembly |
| 09/10/1985 | CA1193184A1 Multiple level methane drainage shaft system |
| 08/20/1985 | US4536035 Hydraulic mining method |
| 08/06/1985 | US4533526 Collecting geothermal fluid and concentrating |
| 08/06/1985 | US4533182 Process for production of oil and gas through horizontal drainholes from underground workings |
| 08/06/1985 | US4533181 Method for forming uniform flow rubble bed |
| 08/06/1985 | US4532991 In situ subterranean retorts |
| 07/30/1985 | US4531783 Stability control in underground workings adjacent an in situ oil shale retort |
| 07/09/1985 | CA1190139A1 Method for mining and reclaiming land |
| 06/11/1985 | US4522448 Method and apparatus for reclamation by reducing highwalls to gradable rubble at augered or longwalled mining sites |
| 06/04/1985 | US4520880 Automatic stone cutter |
| 04/23/1985 | US4512610 Mining system |
| 03/26/1985 | US4506931 Method and apparatus for mining |
| 03/20/1985 | EP0057711B1 Mineral winning machine and system |
| 03/19/1985 | US4505516 Hydrocarbon fuel recovery |
| 03/12/1985 | CA1183909A1 Rf applicator for in situ heating |
| 03/05/1985 | US4502733 Oil mining configuration |
| 02/12/1985 | US4498706 Solution mining of trona or nahcolite ore with aqueous NaOH and HCl solvents |
| 02/12/1985 | US4498391 Explosive mine breaking apparatus with arc-suppressing heat-dissipating fluid around the charge bodies |
| 02/05/1985 | US4497635 Sulfur remelting |
| 01/29/1985 | US4496191 Selective mining from horizontal holes |
| 01/29/1985 | CA1181774A1 Method of open cut mining |
| 01/22/1985 | CA1181438A1 Method of and apparatus for hydraulic mining |
| 12/04/1984 | CA1178979A1 Mining method |
| 11/06/1984 | US4480872 Modified strip mining apparatus |
| 10/23/1984 | US4478457 Longwall mining apparatus for working thick seams |
| 10/02/1984 | US4474506 Method for constructing in rock storage locations for liquid products, for example oil products |
| 09/04/1984 | CA1173875A1 Insulating pipe joint |
| 08/28/1984 | CA1173464A1 Method for opening mineral deposit and subsequent mining thereof |
| 08/21/1984 | US4466669 Method of open cut mining |
| 08/21/1984 | US4466668 Method of forming an in situ oil shale retort in formation with joints |
| 08/07/1984 | US4463987 System for undersea recovery of hydrocarbons |
| 07/31/1984 | US4462713 Method for mining and reclaiming land |
| 07/17/1984 | US4460218 Characterization of in situ oil shale retorts prior to ignition |
| 07/17/1984 | CA1170980A1 Method of recovering viscous petroleum employing heated subsurface perforated casing containing a movable diverter |
| 07/17/1984 | CA1170977A1 Method for underground gasification of solid fuels |
| 07/10/1984 | US4458948 Horizontal free face blasting for minimizing channeling and mounding in situ retort with cusp at intermediate elevation |
| 07/10/1984 | US4458947 Mining method |
| 07/10/1984 | US4458946 Secondary oil shale recovery technique |
| 07/10/1984 | US4458945 Oil recovery mining method and apparatus |
| 07/10/1984 | US4458944 Fragmentation, explosive expansion; oxygenation |
| 06/12/1984 | US4453770 Mining method and system |
| 06/12/1984 | US4453769 In situ oil shale retort having horizontal voids with side pillars |
| 06/05/1984 | US4452689 Huff and puff process for retorting oil shale |
| 06/05/1984 | US4452489 Multiple level methane drainage shaft method |
| 05/29/1984 | CA1168282A1 Electrode device for electrically heating underground deposits of hydrocarbons |
| 05/08/1984 | US4447090 Drilling blast and vent holes, detonation of explosives |
| 05/08/1984 | US4446921 Treatment with supercritical gas |
| 05/01/1984 | US4445723 Method of circle mining of ore |
| 04/24/1984 | US4444278 Rotatable drilling head |
| 04/10/1984 | US4441616 Process for sorting coarse to fine materials according to their chemical composition |
| 04/10/1984 | CA1165360A1 Electrode device for electrically heating underground deposits of hydrocarbons |
| 04/03/1984 | US4440449 Molding pillars in underground mining of oil shale |
| 04/03/1984 | US4440448 Method for opening mineral deposit and subsequent mining thereof |
| 04/03/1984 | US4440446 Method for forming a module of in situ oil shale retorts |
| 04/03/1984 | US4440445 Fluid outlet at the bottom of an in situ oil shale retort |
| 04/03/1984 | US4440444 Method for controlling void in an in situ oil shale retort |
| 03/20/1984 | US4437706 Hydraulic mining of tar sands with submerged jet erosion |
| 03/06/1984 | US4435017 In situ oil shale retort with differing upper and lower void fractions |
| 02/28/1984 | US4433724 In an oil well |
| 02/14/1984 | US4431341 Construction of a concrete lined chamber |
| 01/10/1984 | US4425057 Method of mining |
| 01/03/1984 | US4423908 Formation of an in situ oil shale retort with control of mounding |
| 01/03/1984 | US4423907 In situ recovery of shale oil |
| 12/06/1983 | CA1158155A1 Thermal recovery of viscous hydrocarbons using arrays of radially spaced horizontal wells |
| 11/15/1983 | US4415295 Mineral mining installations |
| 11/15/1983 | US4415207 Underspoil slurry haulage |
| 09/06/1983 | US4402552 Open surface flotation method for extracted crude oil |
| 09/06/1983 | US4402550 Method for forming an in situ oil shale retort with controlled seismic vibration |
| 08/23/1983 | US4400035 Process for the extraction of thick coal seams |
| 08/16/1983 | CA1152114A1 Method of selective underground mining and stabilization of rock cavities |
| 08/09/1983 | US4397502 Two-pass method for developing a system of in situ oil shale retorts |
| 08/02/1983 | US4396231 Horizontal free face blasting for minimizing channeling and mounding |
| 08/02/1983 | CA1151063A1 Enhanced oil recovery employing blend of carbon dioxide, inert gas and intermediate hydrocarbons |
| 07/19/1983 | US4393934 Conditioning a coal seam prior to in-situ gasification |
| 07/05/1983 | US4391470 Method of, and apparatus for, winning mineral material |
| 07/05/1983 | US4391467 System for producing a uniform rubble bed for in situ processes |
| 06/29/1983 | EP0024418B1 Process for sorting coarse-to-fine material according to the chemical composition thereof |
| 05/31/1983 | US4385784 Method for forming an in situ oil shale retort |
| 05/17/1983 | US4383715 Wall brush |
| 04/26/1983 | US4381124 Method of mining an oil deposit |
| 04/26/1983 | CA1145367A1 Underspoil slurry haulage |
| 04/12/1983 | US4379593 Rubblizing to produce a plurality of stopes |
| 04/12/1983 | US4379592 Method of mining an oil-bearing bed with bottom water |
| 04/12/1983 | US4379590 Ventilation air and process air distribution for in situ oil shale retorts |
| 04/05/1983 | US4378949 Production of shale oil by in-situ retorting of oil shale |
| 04/05/1983 | CA1144191A2 Open pit mining for tar sands |
| 04/05/1983 | CA1144103A1 Method and apparatus for underground working of ore deposits |
| 03/29/1983 | US4378132 Mining method and apparatus |
| 03/22/1983 | US4377353 Method of selective underground mining and stabilization of rock cavities |
| 03/22/1983 | US4377310 Method of underground working of ore deposits and handling ore |
| 03/22/1983 | CA1143387A2 Open pit mining for tar sands |
| 02/17/1983 | WO1983000526A1 A method for constructing in rock storage locations for liquid products, for example oil products |
| 02/08/1983 | US4372615 Method of rubbling oil shale |