| Patents for E21C 41 - Methods of underground or surface mining; Layouts therefor (2,789) |
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| 08/14/2013 | CN103244121A Track and trackless coupled bottom ore removal system |
| 08/08/2013 | DE102013001555A1 Verfahren zur Verbesserung des Processing in der Reflexionsseismik Process for improving the processing in the seismic reflection |
| 08/07/2013 | CN203114291U Wear-resistant steel draw shaft |
| 08/07/2013 | CN103233757A Thin seam double-unit face centralized transportation roadway end support and coal mining method |
| 08/07/2013 | CN103233740A Top-cutting roadway coal-pillar-free mining method of close-range thin coal seam |
| 08/07/2013 | CN103233739A Mining method for thick and large ore pillar under filling body wrapping |
| 08/07/2013 | CN103233738A Comprehensive weakening method of top coal of heavy-pitch super high seam |
| 08/01/2013 | US20130193743 Apparatus and Method for Mining Coal |
| 07/31/2013 | CN103225509A Large mining height fully-mechanized mining stope roof plate classification and supporting resistance determination method |
| 07/31/2013 | CN102434157B V-shaped groove top plate closing method for goaf area |
| 07/25/2013 | US20130191029 Blasting method |
| 07/25/2013 | US20130187437 Mining Machine, In Particular Surface Miner, As Well As Method For The Removal And Installation Of A Transport Device In A Mining Machine |
| 07/25/2013 | US20130187436 Coal caving cycle |
| 07/24/2013 | CN103216239A Backfill handling method for activity subsidence area of mine |
| 07/24/2013 | CN103216238A Open pit coal mine mining process |
| 07/24/2013 | CN103216237A Open pit coal mine mining process |
| 07/24/2013 | CN103216236A Method for reducing subsidence of stope overburden bed separation by grouting |
| 07/24/2013 | CN103216235A Automatically controlled full-mechanized caving mining loose visual simulation experiment table |
| 07/24/2013 | CN103216234A Horizontal branch multi-well-group butted well and construction method thereof |
| 07/24/2013 | CN102108868B Balanced excavation method for room and pillar mining method |
| 07/18/2013 | WO2013105882A2 Method for the subterranean leaching of nickel-cobalt ores |
| 07/18/2013 | WO2013105881A2 Method for constructing an injection system for developing the non-water-saturated part of an ore body during subterranean leaching |
| 07/17/2013 | CN103206216A Underground working face mining sequence optimization method for prolonging service time of surface land |
| 07/17/2013 | CN103206215A Precontrol top upward access cut-and-filling stopping method |
| 07/17/2013 | CN102296957B Method of transfixing and distressing with one explosion during tunneling of seam roadway with rock burst |
| 07/17/2013 | CN101802645B Subsurface positioning system and method for monitoring movement underground |
| 07/11/2013 | WO2013102309A1 Longwall working face, non-pillared mining method |
| 07/10/2013 | CN203044301U Gravity screening orepass device |
| 07/10/2013 | CN103195428A Extra-thin coal seam bottom climbing type comprehensive exploitation technology |
| 07/10/2013 | CN103195427A Top-shoveling and bottom-cutting type full-seam mining fully-mechanized coal mining method for extrasoft thick coal seam |
| 07/10/2013 | CN103195426A Steep-coal-seam long wall face non-pillar coal mining method |
| 07/10/2013 | CN102337893B Method for processing suspension top by medium-deep hole blasting on upper and lower shoes |
| 07/10/2013 | CN102305074B Flat-bottomed pillar sublevel caving method of reinforced concrete structure artificial roof |
| 07/04/2013 | US20130169961 System for classification of materials using laser induced breakdown spectroscopy |
| 07/03/2013 | CN103184871A Coal pillar setting and extracting method for protecting important water body |
| 07/03/2013 | CN103184870A Open backfilling mining method during borehole drilling period |
| 07/03/2013 | CN102251775B Ecological restoration method for coal gangue dump |
| 07/03/2013 | CN101864956B Sectional coal pillar-free exploitation method |
| 06/26/2013 | CN203022760U Novel compound artificial boundary ore pillar |
| 06/26/2013 | CN203022759U Local explosive type salt mine mining device |
| 06/26/2013 | CN203022758U Corrosion resistant type salt mine mining device |
| 06/26/2013 | CN203022757U Heating type salt mine mining device |
| 06/26/2013 | CN203022756U Automatic cruise type salt mine mining device |
| 06/26/2013 | CN203022755U Automatic-control salt mine mining device |
| 06/26/2013 | CN203022754U Illumination type salt-mine exploitation device |
| 06/26/2013 | CN203022753U Noise-reduction type salt mine exploiting device |
| 06/26/2013 | CN203022752U Coating protection type salt mine exploration device |
| 06/26/2013 | CN203022751U Environment-friendly energy-saving type salt mine mining device |
| 06/26/2013 | CN203022750U Piston control type salt mine mining device |
| 06/26/2013 | CN203022749U Constant-temperature protective type salt mine mining device |
| 06/26/2013 | CN203022748U Salt mine exploiting device with fluorescence |
| 06/26/2013 | CN203022747U Electromagnetic type salt mine exploiting device |
| 06/26/2013 | CN203022746U Multiple-filtration salt mine exploitation device |
| 06/26/2013 | CN203022745U Anti-freezing salt mine exploitation device |
| 06/26/2013 | CN203022744U Anti-blocking salt mine exploitation device |
| 06/26/2013 | CN203022743U Anti-scaling salt mine exploitation device |
| 06/26/2013 | CN103174426A Solution mining of ore containing sodium carbonate and bicarbonate |
| 06/26/2013 | CN103174425A Method suitable for preventing rock burst of hard huge thick top plate |
| 06/26/2013 | CN103174424A Breast and pillar method under long-wall arrangement |
| 06/19/2013 | CN203008918U Wind-energy ore extraction device |
| 06/19/2013 | CN203008917U Camera shooting monitoring type salt mine exploitation device |
| 06/19/2013 | CN203008916U Sand-proof salt mine exploiting device |
| 06/19/2013 | CN203008915U Wind-energy auxiliary salt mine exploiting device |
| 06/19/2013 | CN203008914U High pressure water flushing type salt mine exploiting device |
| 06/19/2013 | CN203008913U Solar energy auxiliary salt mine exploiting device |
| 06/19/2013 | CN203008912U Numerical code type salt mine exploiting device |
| 06/19/2013 | CN203008911U Low-voltage direct current type salt mine exploitation device |
| 06/19/2013 | CN203008910U Knock-on type salt mine mining device |
| 06/19/2013 | CN203008909U Front end cutting type salt mine exploration device |
| 06/19/2013 | CN203008908U Air brake type salt mine exploration device |
| 06/19/2013 | CN203008907U Centrifugal power type salt mine exploration device |
| 06/19/2013 | CN203008906U Magnetic-control type salt mine exploration device |
| 06/19/2013 | CN103161468A Well and rock salt solution mining-well recharging filling circulation mining method |
| 06/19/2013 | CN103161467A Horizontal moderately thick mine body compartment type filling mining method |
| 06/19/2013 | CN101787888B Method of mining coal |
| 06/18/2013 | CA2617435C Starter car for a drilling device |
| 06/12/2013 | EP2602427A1 Process for fluid drainage and collection by in-situ leaching involving diversion holes |
| 06/12/2013 | EP2602426A1 Liquid guiding and collection process with secondary channels for in situ leaching |
| 06/12/2013 | CN103147761A Filling mining method of gently inclined thin mineral deposit with soft roof |
| 06/12/2013 | CN103147760A Large-scale horizontal jamb mining method under existence of bottom caving group occurrence |
| 06/12/2013 | CN103147759A Prospecting and short-hole shrinkage mining method of small inclined ore body |
| 06/12/2013 | CN103147758A Coal mining rate control method matching with isolated grouting filling of mining overburden zone |
| 06/12/2013 | CN103147757A Intermittent mining method |
| 06/12/2013 | CN102251773B Route type upward horizontal layered filling mining method suitable for extremely complex ore body mining |
| 06/12/2013 | CN101967976B Open pit mined-out area through hole plug and through hole plugging method thereof |
| 06/12/2013 | CN101821205B Method of raising the pH of acidic bodies of water |
| 06/12/2013 | CN101285384B Large diameter, deep borehole and non undercutting mining method |
| 06/11/2013 | CA2628887C Apparatus for assembling a liner |
| 06/06/2013 | US20130140872 Hydraulic fracturing |
| 06/05/2013 | CN202970715U Automatic miniature coal mining system suitable for model test |
| 06/05/2013 | CN102102518B Top coal caving coordinated mining method for thick coal seam under dam body of reservoir |
| 06/05/2013 | CN101557452B Scanning system for 3d mineralogy modelling |
| 05/30/2013 | WO2013011083A3 Finished-part track for an inclined conveyor system for mining trucks |
| 05/22/2013 | CN103114855A Jamb recovery and cushion layer formation integrated technology in process of mining from outdoors into underground |
| 05/22/2013 | CN103114854A Pillar robbing method of reconstructed artificial stud |
| 05/22/2013 | CN103114853A Method for backfilling separately-recovered and sub-transported gangues of underground dirt band coal layer and complete equipment |
| 05/22/2013 | CN101158267B Method and system for accessing subterranean deposits from the surface |
| 05/22/2013 | CN101006249B Method and apparatus for scheduling the extraction of a resource and for determining the net present value of an extraction schedule |
| 05/15/2013 | CN103104287A Stripe gob filling repeated-mining method |
| 05/15/2013 | CN103104261A Multilayer ore body three dimension cooperation mining method |