| Patents for E21C 41 - Methods of underground or surface mining; Layouts therefor (2,789) |
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| 05/15/2013 | CN103104260A Comprehensive-conventional mechanical mining double-unit face coal mining method under complicated geological conditions |
| 05/15/2013 | CN103104259A Inclination fragmentation ore body segment top board reconstruction middle-deep hole ore break down filling mining method |
| 05/15/2013 | CN103104258A Method for improving ore recovery rate of gentle dip ore body by non-pillar sublevel caving |
| 05/08/2013 | CN103097659A Continuous-extraction mining system |
| 05/08/2013 | CN103097658A Continuous-extraction mining system |
| 05/08/2013 | CN103089279A Multi-lane along-groove inter-lane thin coal pillar reinforcing method |
| 05/08/2013 | CN103089268A Intensive mining method of ore cluster in ore-concentrated area |
| 05/08/2013 | CN103089267A Thin-ore-body shallow hole shrinkage method without sill pillar |
| 05/08/2013 | CN103089266A Drift-pillar-free sublevel barnyard caving mining method of open pit transferred underground transitional period |
| 05/08/2013 | CN103089265A Middle-deep hole blasting ore breaking method for underground mining |
| 05/08/2013 | CN102182459B Method for recovering remaining triangle coal on two-winged stope by flexible shield support mining method |
| 05/08/2013 | CN101952547B Method for automatically creating a defined face opening in longwall coal mining operations |
| 05/02/2013 | WO2013062871A2 Horizontal borehole mining system and method |
| 05/02/2013 | WO2013059911A1 Undercut excavation method with continuous concrete floors |
| 05/02/2013 | US20130106166 Horizontal Borehole Mining System and Method |
| 05/02/2013 | US20130106165 Underground mining |
| 05/02/2013 | CA2853564A1 Undercut excavation method with continuous concrete floors |
| 05/01/2013 | CN202914104U Water retention mining simulation system |
| 05/01/2013 | CN103075157A Advance roof-cutting bottom-free structural bench breaking continuous mining method for flat inclined ore body |
| 05/01/2013 | CN103075156A Chessboard chamber pre-protection top upward middle-length hole ore-breaking segmented filling mining method |
| 05/01/2013 | CN103075155A Steeply inclined coal seam fully-mechanized mining method and supporting facilities |
| 05/01/2013 | CN103071663A Integral comprehensive utilization method for waste rocks of earth-disposing site of closed iron mine |
| 04/26/2013 | CA2756266A1 Undercut excavation method with continuous concrete floors |
| 04/25/2013 | US20130099552 Method of mineral fuel beneficiation with subsequent delivery to the consumer by pipeline transportation |
| 04/24/2013 | CN103061768A Diskless region type connection roadway continuous sectional cut-and-filling stoping method shared by chamber and jambs |
| 04/24/2013 | CN103061767A Downward horizontal-slice dry-type filling mining method |
| 04/24/2013 | CN103061766A Method for preventing and controlling coalbed rockburst through chemical reaction |
| 04/24/2013 | CN103061765A Z type horizontal stratification top coal caving coal mining method in half-edge thick coal seam |
| 04/24/2013 | CN103061764A Goaf waste rock filling coal mining method of flexible shield support in half-edge coal seam |
| 04/24/2013 | CN102031972B L-shaped mining method under open-underground mining |
| 04/23/2013 | CA2501840C System and method(s) of mine planning, design and processing |
| 04/18/2013 | WO2013006966A3 Method for the in situ recovery of heavy oil from a subterranean deposit |
| 04/18/2013 | US20130093236 Demountable Pin and Collet Assembly and Method to Securely Fasten a Ranging Arm to a Longwall Shearer Using Such Assembly |
| 04/17/2013 | CN102061920B Exploring method of water liberation working surface of water-enriched mine area |
| 04/16/2013 | CA2680566C Vibratory milling machine having linear reciprocating motion |
| 04/10/2013 | EP1687584B1 Method of blasting multiple layers or levels of rock |
| 04/10/2013 | CN202866810U Multifunctional car for underground coal mine |
| 04/10/2013 | CN103032070A Boundary-controlled room column type sublevel open stoping subsequent stage filling mining method |
| 04/10/2013 | CN102022116B Method and system for continuous mining device |
| 04/10/2013 | CN101915100B Loess-filling coal-mining method in a coal mine |
| 04/10/2013 | CN101738147B Method for dyeing interface of bursting body |
| 04/03/2013 | CN103016009A Simple shrinkage stoping method for small ore body mining |
| 04/03/2013 | CN103016008A Mining stopping method for downwards mined underlying seams of coal seam group |
| 04/03/2013 | CN102261248B Sill-pillar-free stage caving stopping method based on creasing-type structure |
| 04/03/2013 | CN101798925B Cutting head type shortwall coal-winning machine and comprehensive mechanized coal mining technology |
| 04/03/2013 | CN101109283B Quantitative decision method for feasibility of mining above hollow |
| 04/02/2013 | US8408658 Apparatus and method for mining coal |
| 03/29/2013 | CA2753811A1 Method of processing tailings from solvent-based hydrocarbon extraction |
| 03/28/2013 | WO2013041036A1 New leaching-mining process by drilling underground in situ |
| 03/28/2013 | WO2012174586A3 Mining method for gassy and low permeability coal seams |
| 03/27/2013 | CN202832550U Energy-saving sand mining device |
| 03/27/2013 | CN102996177A Method for reserving filling channel in operation with cement filling method |
| 03/27/2013 | CN102996131A Solid-filling coal mining method with two pre-excavating tunnels for advancing |
| 03/27/2013 | CN102996130A Automatic micro-coal extraction system suitable for model test |
| 03/27/2013 | CN102996129A Coal mining method for common section haulage roadway of ultra-close thin coal seams |
| 03/27/2013 | CN101644157B Space-time conversion exploitation method for high and steep rock slope stock ground near river |
| 03/20/2013 | CN202810855U Underground movable cemented strip filling system by utilizing dug gangue |
| 03/20/2013 | CN102979526A Building process of ore removal trench by adopting filling method in medium-length hole sublevel mining |
| 03/20/2013 | CN102305073B Sill pillar staged caving stoping method with single route projecting eaves structure |
| 03/20/2013 | CN102287189B Method for determining reasonable boundary for converting strip mining into underground mining for mine |
| 03/14/2013 | WO2013033823A1 Pumping system |
| 03/14/2013 | WO2013001364A3 Extracting mined ore, minerals or other materials using sensor-based sorting |
| 03/13/2013 | CN102966354A Non-pillar mining method for hard roof coal wall of thick coal seam |
| 03/13/2013 | CN102966353A Arch-type full-mining method for three-unders coal in thick coal seam |
| 03/13/2013 | CN101936166B In-situ leaching, drainage and liquid collection process with diversion holes |
| 03/13/2013 | CN101400873B Waste disposal during pit mining |
| 03/12/2013 | CA2469247C A method and means for recovering hydrocarbons from oil sands by underground mining |
| 03/06/2013 | CN102953733A Central outside-vein house pillar type combined crosscut two-end inside-vein continuous segment filling mining method |
| 03/06/2013 | CN102953732A Room-and-pillar major-diameter longhole inverted-step-like segmented lateral caving subsequent filling mining method |
| 03/06/2013 | CN102383801B Quantitative determining method for reasonable thickness of covered rock layer by using stope caving method |
| 03/06/2013 | CN102061918B Coal mining method for co-mining gas in mine |
| 03/06/2013 | CA2751791A1 Pumping system |
| 02/27/2013 | CN102943675A Ore drawing method combining cut-off grade and ore removal total quantity control |
| 02/27/2013 | CN102943674A Gangue bag filling method in thin coal seam wide roadway tunneling under tight roof |
| 02/27/2013 | CN102943673A Cutting method combining deep hole cutting and small well cutting |
| 02/27/2013 | CN102261249B Creasing-type sill-pillar-free stage caving stopping method based on steel structured artificial top |
| 02/20/2013 | EP2558814A1 High energy blasting |
| 02/20/2013 | CN102155227B Continuous mining method in vertical direction and application thereof in full ore body continuous mining |
| 02/20/2013 | CN102155226B Roadway backfill mining method for coal seams with medium-high thickness |
| 02/19/2013 | US8380436 Blasting method |
| 02/13/2013 | CN102926754A Two-tunneling bidirectional stripping two-step pre-support mining method |
| 02/13/2013 | CN102926753A Deep hole caving backfilling stoping method for artificially freezing stope roof |
| 02/13/2013 | CN102536301B Protective layer exploitation and gas pumping-exhaust management system and using method thereof |
| 02/13/2013 | CN102146794B Grouting, consolidating and gob-side tunneling process method |
| 02/13/2013 | CN102061919B Co-mining tunneling method of seam roadway gas |
| 02/13/2013 | CN101936165B Well spacing method for karst carbonate reservoir |
| 02/07/2013 | US20130033090 Automated stop and shutdown operation of a mining machine |
| 02/07/2013 | US20130033089 Material handling system for mining machine |
| 02/07/2013 | US20130033088 Automated pre-tramming operation of a mining machine |
| 02/07/2013 | US20130033087 Automated cutting operation of a mining machine |
| 02/07/2013 | US20130033085 Stabilization system for a mining machine |
| 02/06/2013 | CN102913244A Underground mining method for kaolin mine |
| 02/06/2013 | CN102226396B Non-explosive mining method of excavation, artificial group-column reconstruction, long-hole caving and subsequent filling |
| 02/05/2013 | US8366201 Method for open pit bench mining |
| 01/30/2013 | EP2550426A1 Manifold string for selectively controlling flowing fluid streams of varying velocities in wells from a single main bore |
| 01/30/2013 | EP2550422A1 Pressure controlled well construction and operation systems and methods usable for hydrocarbon operations, storage and solution mining |
| 01/30/2013 | CN102906532A 高能量爆破 High-energy blast |
| 01/30/2013 | CN102900439A Method for comprehensive utilization of monohydrallite daub ore in west of Guangxi |
| 01/30/2013 | CN102900438A Residual coal full-mechanized repeated mining method of near-distance inflammable seam gob |
| 01/30/2013 | CN102900437A Multi-channel grade separation type laneway arrangement method on coal face |