| Patents for E21C 41 - Methods of underground or surface mining; Layouts therefor (2,789) |
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| 07/08/1998 | CN1186898A Forced leeching method for crashed argillaceous ore in site |
| 06/30/1998 | CA2156566C Method and apparatus for developing shafts using small diameter shafts |
| 06/23/1998 | US5769504 Equipment for shortwall mining useful for extraction of pillars in underground coal mines |
| 06/18/1998 | DE19652276A1 Verdant slope especially tip production |
| 05/05/1998 | CA2047067C Method for developing thick beds of minerals |
| 04/22/1998 | CN1179811A Method of winning coal, particularly from thick coal-seams |
| 04/08/1998 | CN1178284A Open-cast and high step mining process |
| 03/18/1998 | CN1176337A Process for planning working panels taking account of prevention and counteraction of rock bursts, especially in hard coal deposit |
| 03/05/1998 | WO1998009026A1 Measurement and display of load of excavating blasted ground |
| 02/25/1998 | CN1174282A Speical large well for exploitation of placer mine |
| 02/25/1998 | CN1174281A Exploitation of placer mine by means of special tunnel and drainage method |
| 02/12/1998 | DE19632154A1 Vertical plate joining concrete components |
| 02/12/1998 | DE19632142A1 Method of using fuel residues in surface or buried chambers |
| 02/05/1998 | DE19631520A1 Solar energy is used in a solution mining process in tropical or sub-tropical regions to produce a sol |
| 02/04/1998 | CN1172196A Bucket dredger attack method |
| 01/29/1998 | DE19628420A1 Method for material breakdown |
| 01/15/1998 | DE19628367A1 Coal-cutting sequence employed in underground mining |
| 01/15/1998 | CA2210420A1 Method of operating a bucket wheel excavator |
| 12/18/1997 | DE19621666A1 Method to quarry bulk particles surrendered to open descending channel cut in rock face |
| 12/17/1997 | EP0812240A1 Screening device and apparatus including same |
| 11/25/1997 | US5690390 Process for solution mining underground evaporite ore formations such as trona |
| 11/19/1997 | CN1165237A Boundary go up (down) hill along ampty tunnelling type mining method |
| 11/13/1997 | DE19618404A1 Identification of cross section in inative mine workings |
| 10/22/1997 | EP0646216B1 Stabilizing compositions and methods for stabilizing subterranean formations |
| 10/15/1997 | CN1162057A Vertically fixed-shaft rotating mode for L-shape strip-area working face |
| 09/18/1997 | DE19610217A1 Vertical lifting system for solid material |
| 09/17/1997 | EP0795680A1 Shortwall mining equipment for extraction of pillars in underground coal mines |
| 09/09/1997 | CA2079694C Undercut excavation method |
| 07/03/1997 | DE19549213A1 Mining extraction equipment for hard coal |
| 06/10/1997 | US5636903 Mining system for removing overburden |
| 05/22/1997 | WO1997018383A1 Process for ensuring optimal orientation of face working operations, in particular in a hard coal deposit |
| 05/07/1997 | CN1149101A Method for crushing voerhead coal |
| 05/07/1997 | CN1034827C Nature coking coal mining method in magma invaded region |
| 03/11/1997 | US5609397 Highwall mining system with driven conveyor units |
| 03/06/1997 | DE19532493A1 Determining depth of blanket mirror in salt cavern |
| 03/04/1997 | CA2041520C Vertically downwards propagating pillar working |
| 01/15/1997 | EP0708748B1 Mixture for use in covering and/or recultivating waste dumps, subsidence areas, etc. |
| 01/08/1997 | CN1139973A Method of optimizing the direction of mining operations, in particular coal-mining operation |
| 12/10/1996 | US5582465 Method and apparatus for mining inclined mineral deposits |
| 12/05/1996 | DE19540362A1 Method of extracting minerals, esp. coal |
| 11/20/1996 | CN1136130A Method for automation of coal mining at declined gallery |
| 11/13/1996 | EP0742345A2 Method and apparatus for removing a minable product from an underground seam |
| 11/13/1996 | CN1135783A Highwall mining system |
| 10/31/1996 | DE19529235A1 Method of manufacturing multilayer refuse dump, etc. |
| 10/31/1996 | DE19529234A1 Method of forming multilayer refuse dump etc. |
| 10/22/1996 | US5567018 Continuous mining linear advance system |
| 10/03/1996 | WO1996030629A1 The continuous mining, transport amd treatment system |
| 09/26/1996 | WO1996029504A1 A method of winning coal, particularly from thick coal-seams |
| 09/11/1996 | CN1130931A Highwall mining system |
| 09/11/1996 | CN1130712A Drainage cut-off (deep ditch high-building method) drainage and supplying optimization combination for preventing and harnessing groud water |
| 09/06/1996 | WO1996026794A1 Screening device and apparatus including same |
| 09/04/1996 | CN1032707C Z-shape coal mining method with road driving along next goaf to top (on-dip) |
| 08/29/1996 | DE4438271C1 Recovery highly viscous products contg. hydrocarbon(s) from e.g. mines |
| 08/06/1996 | USH1584 Mine tailings replacement |
| 08/06/1996 | US5542788 Method and apparatus for monitoring mine roof support systems |
| 07/02/1996 | US5531507 Method of removing a minable product from an underground seam and bottom hole tool |
| 06/05/1996 | DE19542254A1 Verfahren zur optimierten Orientierung von Abbaubetrieben, insbesondere in einer Steinkohlenlagerstätte Method for the optimized orientation of mining operations, particularly in a coal deposit |
| 06/04/1996 | US5522676 Undercut excavation method |
| 05/07/1996 | US5513903 Method and apparatus for developing shafts using small diameter shafts |
| 05/01/1996 | EP0708748A1 Mixture for use in covering and/or recultivating waste dumps, subsidence areas, etc. |
| 04/25/1996 | DE19512661A1 Method of optimised orientation of mining processes, esp in coal deposit |
| 04/25/1996 | DE19500958A1 Method of planning gas pockets in tectonic salt deposits |
| 03/19/1996 | US5500649 Method and apparatus for monitoring the thickness of a coal rib during rib formation |
| 01/10/1996 | CN1114712A Mining and ore dressing process new modle for mine |
| 12/12/1995 | US5474365 Apparatus for mining a seam, in particular of coal |
| 12/06/1995 | CN1113072A Method of cultivation of coal and lignite infields formed by uncovering (open cast mining) |
| 11/29/1995 | CN1112640A Escarpment shrinkage mining method |
| 11/15/1995 | CN2212656Y Concentrated water-dispensing bittern-mining device |
| 11/09/1995 | WO1995030067A1 A highwall mining system with mining and removal of coal (or ore) |
| 10/12/1995 | DE4412002A1 Narrow frontage machine for suspended mining of inclined coal seams |
| 07/25/1995 | US5436396 Stabilizing compositions and methods for stabilizing subterranean formations |
| 07/18/1995 | CA2118988C Non-entry method of underground excavation in weak or water bearing grounds |
| 06/27/1995 | US5427439 Surface mining conveyor system |
| 06/21/1995 | CN1103926A Apparatus for underground extraction |
| 06/20/1995 | US5425601 Longwall mining roof control system |
| 06/08/1995 | DE4405820C1 Flushing medium for potash mining |
| 05/26/1995 | WO1995014155A1 Method of optimizing the direction of mining operations, in particular coal-mining operations |
| 05/24/1995 | EP0653910A1 Method of cultivation of coal and lignite infields formed by uncovering (open cast mining) |
| 05/13/1995 | CA2134518A1 Longwall mining roof control system |
| 05/10/1995 | CN1102455A Z-shape coal mining method with road driving along next goaf to top (on-dip) |
| 05/09/1995 | US5413047 Overburden removal method with blast casting and excavating apparatus |
| 05/02/1995 | US5411432 Programmable oscillating liquid jet cutting system |
| 04/25/1995 | US5409298 Open cut mining apparatus |
| 04/18/1995 | US5407252 Method and apparatus for scaling mine roofs and ribs |
| 04/05/1995 | EP0646216A1 Stabilizing compositions and methods for stabilizing subterranean formations. |
| 03/15/1995 | CA2132037A1 Mining system |
| 03/09/1995 | DE4329549A1 Machine system for winning minerals deposited as a stratum, especially coal |
| 03/08/1995 | CN1027826C Thick coal seam mining method in funnel coal face |
| 03/02/1995 | DE4328863A1 Mining apparatus for underground mining |
| 02/02/1995 | WO1995003142A1 Sanitation process for industrial sedimentation plants |
| 01/26/1995 | WO1995002747A1 Highwall mining system |
| 01/26/1995 | WO1995002746A1 Highwall mining system |
| 01/26/1995 | WO1995002565A1 Mixture for use in covering and/or recultivating waste dumps, subsidence areas, etc. |
| 01/19/1995 | DE4323637A1 Combined mining machine equipped with linear motors for parting, loading and conveying material occurring in seams in underground longwall mining |
| 01/10/1995 | US5380127 Non-entry method of underground excavation in weak or water bearing grounds |
| 01/03/1995 | US5378049 Rotary cutter for extracting hard rock |
| 12/24/1994 | CA2092121A1 Bitumen recovery from oil sands |
| 12/22/1994 | WO1994028705A1 Method of cultivation of coal and lignite infields formed by uncovering (open cast mining) |
| 12/22/1994 | CA2141681A1 Method of cultivation of coal and lignite infields formed by uncovering (open cast mining) |
| 12/21/1994 | EP0629769A2 Method and apparatus for leaching out cavities in salt formations |