| Patents for E21F 15 - Methods or devices for placing filling-up materials in underground workings (1,589) |
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| 01/23/2013 | CN202690129U Building block buckling tenon structural wall in retaining roadways along goaf |
| 01/23/2013 | CN102889097A System for feeding coal mine solid filling material |
| 01/23/2013 | CN102887693A Filling and consolidating powder for mining purposes and use thereof |
| 01/23/2013 | CN102182923B Gravity-flow cemented filling method of high-length-to-column-ratio pipes |
| 01/16/2013 | CN202673359U Waste rock gravity-glide filling equipment |
| 01/16/2013 | CN202673358U Mine filling body bleeding water pipe and bleeding system consists of mine filling body bleeding water pipe |
| 01/16/2013 | CN202673357U Automatic feeding and dust removing integrated device for mine concrete pump |
| 01/16/2013 | CN202673356U Mine dry ash dustproof filling equipment |
| 01/16/2013 | CN202673355U Coal mine mining with filling underground feed buffer |
| 01/16/2013 | CN102877848A Method for performing coal mining and gangue cementation stripe filling simultaneously |
| 01/16/2013 | CN102011610B Supporting method of no-pillar mining mode for medium-thick coal seams |
| 01/09/2013 | CN202659278U Telescopic mobile partition wall |
| 01/09/2013 | CN102865103A Distributed using method for mine underground water |
| 01/09/2013 | CN102865102A Self-flowing concrete convex and concave self-connection filling method |
| 01/09/2013 | CN102865101A Filling method and system of coal mine goaf |
| 01/09/2013 | CN102865100A Coal mine goaf filling method |
| 01/09/2013 | CN102865099A Under-building, under-railway and under-water mining filling process |
| 01/09/2013 | CN101806227B Gangue pushing machine for filing gangue in mined-out area |
| 01/02/2013 | CN202645633U Rotating tray-type large vertical deep double-hole solid material continuous conveying system |
| 01/02/2013 | CN102852552A High-water material filling column and construction method thereof |
| 01/02/2013 | CN102852551A Gob-side entry retaining method using high-water material filling columns |
| 01/02/2013 | CN102852550A Coal-pillar-free semi-normal-position goaf-side entry retaining method |
| 01/02/2013 | CN102182509B Cut-and-fill three-dimensional simulation test device and method |
| 12/26/2012 | CN202628180U Hydraulic filling device for upper corner |
| 12/26/2012 | CN202628179U Lifting door opening and closing system |
| 12/26/2012 | CN202628178U Novel filling bracket |
| 12/26/2012 | CN202628177U Gangue-coal ash two-column shield-type hydraulic filling support |
| 12/26/2012 | CN102121399B Paste filling blockage pipe discharging gate with pressure detection function |
| 12/26/2012 | CN102121397B Paste filling pipeline system for coal mine |
| 12/26/2012 | CN101358534B Filling equipment in mined-out area |
| 12/19/2012 | CN102828776A Mine underground filling system |
| 12/19/2012 | CN102828762A Backstop gangue beam suspension swinging beam type gangue filing hydraulic support frame with side protection plate |
| 12/19/2012 | CN102086765B High-sublevel multi-layer mining method of ultrathin copper ore body |
| 12/19/2012 | CN102071940B Construction method for mine shaft through multilayer goaf |
| 12/19/2012 | CN102003185B Sublevel stripe tail salt stoping dry-type filling-mining method |
| 12/12/2012 | CN202596786U Backfilling material compacting mechanism for mine goaf |
| 12/12/2012 | CN202596762U Baffle-type filling hydraulic bracket |
| 12/12/2012 | CN102162364B Layout method for underground dense-medium shallow-slot coal preparation in coal mine |
| 12/05/2012 | CN202580435U Special tee joint for underground filling paste slurry delivery pipes |
| 12/05/2012 | CN202578781U Layered load-bearing filling structure beside hard roof gob-side entry retaining |
| 12/05/2012 | CN202578780U Anchor bolt net strap gangue bag filled wall |
| 12/05/2012 | CN202578779U Large-framework concrete gob-side separation wall |
| 12/05/2012 | CN202578778U Gob-side entry retaining steel bar seal body simple filling structure |
| 12/05/2012 | CN102808650A Mine filling body bleeding tube and formed bleeding system thereof |
| 12/05/2012 | CN102808637A Reverse four-connecting-rod filling hydraulic support with compaction function |
| 12/05/2012 | CN102808624A System and method for simultaneous mining of coal gangue |
| 12/05/2012 | CN102807388A Safe and green mining method for simultaneously reinforcing and mining mineral resource |
| 11/28/2012 | CN202560316U Novel mine goaf backfilling device |
| 11/28/2012 | CN202560315U Vertical sand silo suitable for mine filling |
| 11/28/2012 | CN202560314U Underground combined mining filling machine |
| 11/28/2012 | CN202560313U Fluid material filling device system in worked out section of mine |
| 11/28/2012 | CN202560280U Multifunctional filling hydraulic support |
| 11/28/2012 | CN202560164U Mining filling drilling accidental blowdown valve |
| 11/28/2012 | CN102797495A Conveying chute for filling unilateral scraper conveyor |
| 11/28/2012 | CN102797488A Hydraulic support filled with bag-type clapboard |
| 11/28/2012 | CN102155260B Method for filling heavy-pitch coal bed goaf |
| 11/28/2012 | CN101858226B Explosion proof and suppression method for wave and energy absorption |
| 11/22/2012 | WO2012155531A1 Technology and equipment for separating coal and gangue and refilling gangue. |
| 11/21/2012 | CN202544923U Mobile hydraulic seal filling device |
| 11/21/2012 | CN202544922U Natural-pressurization connecting funnel of tailings filling pipeline system |
| 11/14/2012 | CN202531236U Water nozzle of mine fills chamber |
| 11/14/2012 | CN102777208A Method for constructing mining impact-resisting sealed wall |
| 11/14/2012 | CN102773142A Anshan type lean magnetite underground ore dressing and filling method |
| 11/14/2012 | CN102155262B Method for filling gas near roadway of coal mine gob-side entry retaining |
| 11/14/2012 | CN102155225B Filling and mining method of coal gases |
| 11/07/2012 | CN202520379U High-risk area filling system |
| 11/07/2012 | CN202520378U Simplified filling template support |
| 11/07/2012 | CN101922292B Coal mine gob-side entry retaining roadside segment bearing unequal strength support principle and application |
| 10/31/2012 | CN202510163U Goaf grouting device |
| 10/31/2012 | CN102758630A Method for extracting part of fault protection coal pillars |
| 10/24/2012 | CN202500606U Device for filling aggregate into formation cavity through ground surface borehole |
| 10/24/2012 | CN102748071A Underground backfilling and transporting method for ground gangue of coal mine |
| 10/24/2012 | CN102748070A Method for supporting gob-side entry retaining building block coak structure wall |
| 10/24/2012 | CN102748050A Supporting and filling integrated six-column hydraulic bracket |
| 10/17/2012 | CN202493287U Multi-functional filtering water filling well |
| 10/17/2012 | CN102733850A Filling and repeated tamping hydraulic mechanism |
| 10/17/2012 | CN102733849A Filling body grouting reinforcement method |
| 10/10/2012 | CN202483625U Suspension type waste filling mechanism |
| 10/10/2012 | CN202483624U Inclusive waste filling and tamping swing beam |
| 10/10/2012 | CN102720537A Hydraulic filling device for upper corner |
| 10/10/2012 | CN102720536A Mine dry ash prevention and filling unit |
| 10/10/2012 | CN102720535A Method for preventing goaf air leakage during soft rock crack development coal seam mining of coal mine |
| 10/10/2012 | CN102720499A Fully-mechanized top-coal caving, filling and mining method |
| 10/10/2012 | CN102716901A Method for disposing and reusing building waste nearby coal mine |
| 10/10/2012 | CN102155261B Paste combined filling method utilizing solid wastes of mine |
| 10/10/2012 | CN102071968B Paste filling pipe expansion device |
| 10/10/2012 | CN101956556B Roof and bottom pillar-free stage upward continuous filling and mining method |
| 10/10/2012 | CN101749047B Paste filling simulation test system |
| 10/03/2012 | CN202467924U Split type paste filling hydraulic support |
| 10/03/2012 | CN202467923U Continuous stirring and filling device for preparing mining paste by utilizing building wastes |
| 10/03/2012 | CN202467922U Mining high water expansion filling bag |
| 10/03/2012 | CN202467921U Hauling pipe type filling system for thin-seam cracked roof |
| 10/03/2012 | CN202467880U Thin seam blast mining solid waste filling hydraulic support |
| 10/03/2012 | CN102705004A Throwing type filling conveyor |
| 10/03/2012 | CN102705003A Rotary-tray type solid material continuous conveying system with two large, vertical and deep holes |
| 10/03/2012 | CN102705002A Roadside proper yielding unequal combined filling structure of gob-side entry retaining and construction method |
| 10/03/2012 | CN102705001A Isolated-section two-hole split-layer grouting filling well location method for mining overburden rock |
| 10/03/2012 | CN102704996A Side dumping filling conveyor |
| 10/03/2012 | CN102704978A High fully mechanized filling, mining and screening hydraulic support |
| 10/03/2012 | CN102704976A Full-mechanized filling and coal-mining hydraulic support |