| Patents for E21C 41 - Methods of underground or surface mining; Layouts therefor (2,789) |
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| 05/02/2001 | CN1065314C Process for ensuring optimal orientation of face working operations, in particular in a hard coal deposit |
| 05/01/2001 | US6224163 Milling roller module for a surface miner |
| 04/05/2001 | WO2001023710A1 Ore pass inspection system |
| 04/05/2001 | CA2385794A1 Ore pass inspection system |
| 04/04/2001 | CN1064110C Process for planning working panels taking account of prevention and counteraction of rock bursts, especially in hard coal deposit |
| 03/21/2001 | CN1063518C Method for prevention and treatment of underground water for open-pit mine |
| 02/27/2001 | US6193881 In-situ chemical reactor for recovery of metals or purification of salts |
| 02/13/2001 | CA2025996C Borehole mining process for recovery of petroleum from unconsolidated heavy oil formations |
| 01/31/2001 | EP0980442B1 In-situ reactor for recovering metals and energy |
| 01/18/2001 | DE19931969A1 Device to reduce loss of released goods during uptake and intermediate conveying for an open mining device with a milling roller and a discharge band; has locking rings to form simple labyrinth |
| 01/04/2001 | WO2000031376A3 Method and system for accessing subterranean deposits from the surface |
| 12/12/2000 | US6158517 Artificial aquifers in hydrologic cells for primary and enhanced oil recoveries, for exploitation of heavy oil, tar sands and gas hydrates |
| 12/06/2000 | EP1056927A1 Surface-assisted continuous underground mining |
| 11/16/2000 | WO2000039428A3 Artificial aquifers in hydrologic cells for oil recovery |
| 10/18/2000 | CN1057583C Method for crushing overhead coal |
| 10/03/2000 | US6126016 Screening device and apparatus including same |
| 09/27/2000 | CN1056908C Method for mining coal bed in certain ploughing depth |
| 09/26/2000 | US6123394 Hydraulic fracturing of ore bodies |
| 09/19/2000 | US6122598 Measurement and display of load of excavating blasted ground |
| 08/29/2000 | US6109699 Tow line equipped remote mining machine and method |
| 08/23/2000 | EP0653910B1 Method of cultivation of coal and lignite infields formed by uncovering (open cast mining) |
| 08/23/2000 | CN1055738C Method for automation of coal mining at declined gallery |
| 08/17/2000 | WO2000047950A1 Laser survey device |
| 08/15/2000 | US6102483 Process for preparing the exposed surface of a rock formation to permit the extraction of parallelepiped shaped blocks of rock ready for final processing, and process and extractor for extracting such blocks |
| 08/10/2000 | WO2000015947A9 Mining machine and mining method |
| 08/09/2000 | EP0812240A4 Screening device and apparatus including same |
| 07/11/2000 | US6086159 Softwall mining method and device |
| 07/06/2000 | WO2000039428A2 Artificial aquifers in hydrologic cells for oil recovery |
| 06/29/2000 | DE19860223A1 Opencast mining by excavators use bucketwheels for soft to medium and shovels for medium to hard interbedded ground using mobile crusher to size inclusions. |
| 06/21/2000 | DE19529235C2 Vorrichtung zum Herstellen einer Abraumhalde im übertägigen Bergbau und deren Verwendung Apparatus for producing a slag heap in the above-ground mining and their use |
| 06/15/2000 | DE19941799A1 Continuous surface miner for mineral raw materials in sedimentary layers has three-track running gear connected by substructure frame with steering actuator, and superstructure with drive, cutter, and loading conveyor |
| 06/13/2000 | CA2112813C Rotary cutter for extracting hard rock |
| 06/07/2000 | CN1053256C Appts. for underground extraction |
| 06/02/2000 | WO2000031376A2 Method and system for accessing subterranean deposits from the surface |
| 06/02/2000 | CA2792184A1 Method and system for accessing subterranean deposits from the surface |
| 05/25/2000 | DE19941800A1 Drive and propulsion mechanism for cutter roll in opencast mining machine, has multi-section roll with drive units at both ends using internal roll flanges and external lateral supports |
| 05/25/2000 | DE19849953C1 Raw material is blasted from a stratum, e.g. for open-cast mining of limestone, by placing compressible material at the blasting hole bottom to attenuate wave propagation transverse to the blasting direction |
| 05/24/2000 | CN1052777C Vertically fixed-shaft steering method for L-shape strip-area working face |
| 05/17/2000 | CN1052525C Open-cast and high step mining process |
| 05/11/2000 | DE19941802A1 Pick-up chute for open cast mining milling roller has shield board enclosing milling roller and with lower stripping edge and opening forming guide tunnel for transferring material to discharge belt |
| 03/29/2000 | CN2371341Y Impactor for breaking stone |
| 03/23/2000 | WO2000015947A1 Mining machine and mining method |
| 03/22/2000 | CN1247931A Ming method utilizing substituting isolating roof |
| 03/16/2000 | DE19847197C1 Recovering highly viscous products from waste sites, mines and other deposits comprises adding alkaline products to viscosity-reducing additives during the process |
| 03/02/2000 | DE19839744A1 A mobile conveyor bridge for open-cast mining has a pivoting joint to enable movement between the receiving end and the delivery end |
| 02/29/2000 | US6030048 In-situ chemical reactor for recovery of metals or purification of salts |
| 02/23/2000 | EP0980464A1 Softwall mining method and device |
| 02/23/2000 | EP0980442A1 In-situ chemical reactor for recovery of metals or purification of salts |
| 02/22/2000 | US6027175 Method and apparatus for highwall mining |
| 02/17/2000 | WO2000008305A1 Mine support and ventilation system |
| 02/17/2000 | WO1999058817A8 R. b. yun's method for the exploitation of open-air mining fields |
| 02/17/2000 | WO1999041489A8 R.b. yun's method for the combined exploitation of mining fields |
| 02/08/2000 | US6022080 Process and system for the solution mining of evaporites and preparation of saline solutions |
| 01/26/2000 | EP0974731A2 Method and apparatus for solution mining in an inclined reservoir |
| 01/14/2000 | CA2243016A1 Concrete block mining method |
| 01/13/2000 | DE19831234A1 Verfahren und Vorrichtung zur Aussolung geneigter Lagerstätten Method and apparatus for brining inclined deposits |
| 01/12/2000 | CN1240874A Method for mining caving coal in gallery of steeply inclined thin, medium-thick, or thick coal seam |
| 01/05/2000 | EP0861365B1 Process for ensuring optimal orientation of face working operations, in particular in a hard coal deposit |
| 12/15/1999 | CN1238420A In-situ chemical reactor for recovery of metals or purification of salts |
| 12/15/1999 | CN1047428C Method for mining and backfill for inclining gently inclined medium thick orebody |
| 12/07/1999 | US5997101 Surface-assisted continuous underground mine conveyor |
| 12/07/1999 | US5997100 Inertization system for highwall mining |
| 11/18/1999 | WO1999058817A1 R. b. yun's method for the exploitation of open-air mining fields |
| 10/07/1999 | DE19724925C2 Schrämmaschine für die Gewinnung mineralischer Stoffe im Langfrontbau unter Tage und ihre Verwendung Cutting machine for the extraction of mineral substances in Langfrontbau underground and their use |
| 09/22/1999 | CN1229165A Method for mining on near water-level very thin coal seam manless operating face |
| 08/31/1999 | CA2075104C Process and device for the exploitation of subterranean deposit by means of a tunnel borer |
| 08/19/1999 | WO1999041489A1 R.b. yun's method for the combined exploitation of mining fields |
| 08/19/1999 | WO1999041488A1 Surface-assisted continuous underground mining |
| 08/11/1999 | CN1225410A Fragment openstope mining method with wave like bottom column |
| 08/04/1999 | CN1224793A Method of recovering coal from blasted down roof |
| 07/14/1999 | CN1044113C Non-electric detonating system for coal mine |
| 07/07/1999 | CN1221851A Coal face detonation and coal extraction |
| 04/14/1999 | CN1213738A Method of determination of reasonable mining width under strip coal layer |
| 04/07/1999 | CN2313042Y Underground sand gravel exploiting apparatus |
| 03/17/1999 | CN1210935A Leaning loss free exploitation technology for underground high-grade thick ore body by steel rope net isolation method |
| 03/09/1999 | US5879057 Horizontal remote mining system, and method |
| 03/04/1999 | DE19737936A1 Underground-mining machine |
| 02/25/1999 | WO1999008947A1 Control system for overburden discharge |
| 02/25/1999 | DE19736662A1 Coal face cutter |
| 02/16/1999 | US5871260 Mining ultra thin coal seams |
| 02/04/1999 | WO1999005396A1 Haulage system for pit mining and discharge gate therefor |
| 02/03/1999 | CN1207155A Process for ensuring optimal orientation of face working operations, in particular in a bard coal deposit |
| 01/26/1999 | US5864060 Method for monitoring the work cycle of mobile machinery during material removal |
| 01/13/1999 | EP0890783A1 Safety device for a gas storage cavern |
| 01/12/1999 | US5857274 Method of operating a bucket wheel excavator |
| 12/24/1998 | DE19729812A1 Sub-aquatic old deposits or load securing equipment for brown coal mine residual holes |
| 12/24/1998 | DE19724925A1 Mining process for materials such as phosphates |
| 11/12/1998 | WO1998050682A1 Softwall mining method and device |
| 11/12/1998 | WO1998050592A1 In-situ chemical reactor for recovery of metals or purification of salts |
| 11/12/1998 | CA2289126A1 In-situ chemical reactor for recovery of metals or purification of salts |
| 11/05/1998 | DE19718688A1 Method of securing ground surrounding disused and filled mine-shaft |
| 10/13/1998 | US5820223 Inertization system for highwall mining |
| 10/08/1998 | WO1998044205A1 Method for monitoring the work cycle of mobile machinery during material removal |
| 10/08/1998 | CA2253475A1 Method for monitoring the work cycle of mobile machinery during material removal |
| 09/02/1998 | EP0861365A1 Process for ensuring optimal orientation of face working operations, in particular in a hard coal deposit |
| 08/27/1998 | DE19706879A1 Method of planning caverns or hollow cavities for landfill in tectonically loaded mountain |
| 08/19/1998 | CN1190693A All thickness coal mining method for seam misplaced coal tunnel distribution on thick seam |
| 08/13/1998 | WO1998035133A1 Mining ultra thin coal seams |
| 07/21/1998 | US5782539 Wall-to-wall surface mining process |
| 07/09/1998 | DE19700344A1 Rotating cutter loader for use in mining coal seams |