Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21C - Mining or quarrying › E21C 41 - Methods of underground or surface mining; Layouts therefor
Patents for E21C 41 - Methods of underground or surface mining; Layouts therefor (2,789)
04/2014
04/08/2014CA2735355C Method and means for recovering hydrocarbons from oil sands by underground mining
04/03/2014WO2014048119A1 New mining process for underground in-situ drilling corrosion of nonmetallic mineral
04/02/2014EP2713006A1 Technology and equipment for separating coal and gangue and refilling gangue.
04/02/2014CN103696788A Abandoned roadway timbering device and construction method of fully mechanized coal mining face passed through abandoned roadway
04/02/2014CN103696773A Combined open-pit and pit mining process of near-surface ore body
04/02/2014CN103696772A Method for increasing recovery rate of fully mechanized caving face
04/02/2014CN103696771A Skip-mining type wangeviry stope branch roadway filling and coal mining method
04/02/2014CN103696770A Cutting raise cutting method used in underground mining
04/02/2014CN103696769A Overhand shrinkage spaced-loading split-blasting slot cutting method
04/02/2014CN102536242B conveyor gateway large-angle rotary stoping method of unequal length fully-mechanized mining working surfaces
04/02/2014CN102251774B Fully mechanized coal mining method combining steeply inclined long-wall drilling type coal mining machine with hydraulic shield type supports
03/2014
03/26/2014CN103670496A Gob-side entry retaining and sectional coal seam gas pre-extracting method for single low-permeability outburst coal seam
03/26/2014CN103670419A Run-through inner dumping method between mining areas for opencast coal mine during period of diversion
03/26/2014CN103670418A Back extraction method capable of improving technical indexes of gentle dip medium thick ore bodies
03/26/2014CN103670417A Non-pillar sublevel caving mining method for discharging ores from side part of electric rake roadway
03/26/2014CN103670416A Method for rapidly and stably arranging equipment on fully mechanized coal mining face
03/26/2014CN103670415A Blast and conventional combined mining method under a coalmine well
03/26/2014CN103670414A Combined coal mechanical blasting mining method
03/26/2014CN103670413A Method for slowing longwall mining pressure appearance of shallow coal seam below gully
03/26/2014CN103670412A Mined-out area processing and de-stressed mining method for mining steep deposits
03/26/2014CN102778182B Beside-roadway topping pressure relief method of roadway driving along gob of small coal pillar influenced by dynamic pressure
03/26/2014CN102562065B Sublevel open-stop and delayed filling mining method
03/26/2014CN102536239B Long-wall working face coal pillar-free mining method
03/20/2014WO2014043658A2 Cutter head for mining machine
03/20/2014WO2013062871A3 Horizontal borehole mining system and method
03/20/2014US20140081533 Slow turning drum for a miner
03/20/2014US20140077578 Cutter head for mining machine
03/19/2014CN103643956A Method for designing surface soil covering thickness for coal gangue filling and reclamation in coal mining subsidence area
03/19/2014CN103643955A Stable middle section conversion method of sill pillar-free sublevel caving mining
03/18/2014US8672415 Advancing longwall system for surface mining
03/12/2014CN203476332U Crawler type coal mining machine
03/12/2014CN103628879A Penetration and dissolution exploitation method of salt lake deposit channels
03/12/2014CN103628878A Crushed surrounding rock ore downward drift layered sublevel-free tunnel filling mining method
03/12/2014CN103628877A Multilayer gentle dip thin-medium ore deposit filling and mining method
03/12/2014CN103628876A Harmonious mining method for block-type dip stripes in deep spanned mining areas of steep inclined seam
03/12/2014CN102678122B Improved inlet-route stoping method for large, thick and cracked ores under scattered body through top and bottom column
03/12/2014CN102635358B Pillar-free block caving method mining process capable of reducing waste rock interfusion amount through water injection
03/12/2014CN102635356B Medium-length hole mining method in multiple blasting free faces of high dipping thin veins
03/05/2014CN103615251A Strip-type mining method for thin ore body
03/05/2014CN103615250A Subsection-studding all-open-stoping backfilling collaborative mining method
03/05/2014CN103615249A Underground cutting mining method of process ore
03/05/2014CN103615248A Top and bottom plate treatment mining technology for hydrogen sulfide-containing coal bed
03/05/2014CN102434159B Mining method for ore bed
02/2014
02/27/2014US20140056646 Apparatus and method for mining coal
02/26/2014CN203452793U Room structure of shallow-hole shrinkage mining method for mining near-surface thick, large and more oblique ore body
02/26/2014CN103603682A Roof supporting method applicable to cutting, drifting and cemented filling mining
02/26/2014CN103603665A Hanging wall side orebody extracting method in mine mining range
02/26/2014CN102419139B Bottom-post-free sublevel caving method adopting reinforced concrete structure artificial false roof
02/26/2014CN102080545B High-risk jamb open-air deep hole cooperative recovery method
02/19/2014CN103590832A Pillar pre-isolation sublevel stick-filling mining method and ore body therefor
02/19/2014CN103590831A Novel mining method of gently-inclined thin and medium thickness ore bodies
02/19/2014CN103590830A Open pit and underground space-time synchronous mining method for multiple-ore body
02/12/2014CN103573268A Upward horizontal layered filling mining method of stress arch continuous mining
02/11/2014CA2673865C Screening disk, roller, and roller screen for screening an ore feed
02/11/2014CA2640018C Method and apparatus for processing a sized ore feed
02/11/2014CA2545358C Method for multiple blasting
02/05/2014CN103557003A Iron ore body safety pillar mining method
02/05/2014CN103557002A Panel mechanized centralized ore-pass upward horizontal cut-and-filling stoping method
02/05/2014CN103557001A Low-section-height drift-pillar-free shrinkage-stoping, subsequent-filling and mining method
02/05/2014CN103557000A Method for preventing gob-side entry rock burst through side-drawing filling
02/05/2014CN102678120B Method for releasing pressure and removing danger of rock burst
01/2014
01/23/2014DE102012016146B3 Stabilizing mine dumps and improving quality of water in mine dumps, comprises introducing passivated alkaline nanoparticles into mine dumps by directional drilling
01/23/2014DE102006028082B4 Verfahren und Vorrichtung zur Bodenpufferung Method and apparatus for Bodenpufferung
01/22/2014CN103527200A Sill-pillar-free sublevel rhombus room subsequent filling mining method
01/22/2014CN103527199A Gob-side entry driving surrounding rock deformation control method for island mining face narrow coal pillar
01/22/2014CN103527198A Hydraulic fracturing control method of cut tight roof/top coal
01/22/2014CN103527197A Solid cementing lane-type mining method for ultra thick seam
01/22/2014CN103527196A Method for recovery of room-type coal pillar through loess filling
01/22/2014CN103527195A Method for separately mining and transporting thick coal seam with gangue and backfilling goaf
01/20/2014CA2821448A1 Stope fill barrier
01/15/2014CN103510958A Gentle dip super-high seam rock cross-cut coal uncovering method
01/15/2014CN103510957A Combined rock cross-cut coal uncovering method
01/15/2014CN103510956A Method for reducing reserved width of waterproof coal pillars of inclined coal seam
01/15/2014CN102493838B Method for fully mechanized continuously-filling coal mining of steeply pitching coal seam
01/15/2014CN102392643B Under-building filling, mining and coal pillar recovering method
01/14/2014CA2567644C Mobile oil sands mining system
01/08/2014CN103498680A Method for increasing top-coal recovery rate in primary mining period of fully-mechanized caving face
01/08/2014CN103498679A Filling and supporting synchronized fully-mechanized mining method for preventing abnormal roof weighting
01/08/2014CN102678121B Layered top-controlling filling mining method for residual ores in deep hole in diskless area
01/08/2014CN102619518B Ore drawing technique for controlling fluidity of ore rocks via pillarless cornice end-wall sublevel caving method
01/08/2014CN102619515B Top-filled high-end-wall pillarless sublevel caving method extraction technique
01/08/2014CN102619514B Top-filled pillarless cornice end-wall sublevel caving method extraction technique
01/08/2014CN102518436B Method for controlling tectonic rock burst in coal mine tunneling
01/08/2014CN101952548B Method for the controlled maintaining of a distance between the roof and the face in longwall mining operations
01/08/2014CN101939507B Milling machine, in particular surface miner, and method for mining milled material of an open cast surface
01/01/2014EP2679767A2 Milling machine, in particular surface miner, and method of removing mining material from an open-cast mining area
01/01/2014CN203374281U Ore drawing spheroid control device of fully mechanized top-coal caving hydraulic bracket
01/01/2014CN103485786A Steeply inclined coal seam strike long-wall mechanization mining method
01/01/2014CN103485785A Method for preventing residual coal during top coal caving on fully mechanized caving face
01/01/2014CN102644464B Constructing method for mining embedded artificial boundary ore pillar from open-pit to underground mine
12/2013
12/31/2013US8617402 Method of raising the pH of acidic bodies of water
12/25/2013CN203362163U Low-permeability high-gas thick-seam water injection high pressure pipeline device
12/25/2013CN103470263A New-level development method for open-pit metal mine
12/25/2013CN103470262A Mining method of nearly horizontal mineral deposit of opencast coal field by casting and internally dumping
12/25/2013CN103470261A Method for roadway driving along goaf under original roadway top plate of fully mechanized top coal caving goaf
12/25/2013CN103470260A Method for arranging ore medium-depth blast holes
12/25/2013CN102619513B Room and pillar type medium-length hole filling mining method using bottom ore withdrawal structures simultaneously arranged in original rock
12/25/2013CN102444401B Coal mining method by filling on blasting mining face of thin coal seam and relevant equipment
12/25/2013CN101832137B Pre-embedding method for coal seam roof strut
12/18/2013CN103452558A Cutting method for sublevel caving mining
1 2 3 4 5 6 7 8 9 10 11 12 13 ... 28