| Patents for E21D 19 - Provisional protective covers for working space (559) |
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| 07/11/2012 | CN202325573U 煤巷钻孔防突装置 Coal Lane drilling outburst prevention device |
| 07/11/2012 | CN102562104A Grid-shaped plastic geogrid and manufacturing method thereof |
| 07/11/2012 | CN102562098A Tunnel steel temporary inverted arch with rapid assembly and disassembly |
| 07/04/2012 | CN202300445U 超浅埋下穿公路长管棚隧道支护结构 Wear long tube road tunnel support structure under the Super Shallow |
| 07/04/2012 | CN202300444U 煤矿巷道预应力鱼腹钢索组合支护结构 Lenticular combination of prestressed cables mine roadway support structure |
| 07/04/2012 | CN102536276A Pentagonal plastic geogrid and manufacture method thereof |
| 06/27/2012 | CN102518456A Method for maintaining roof of composite bed under stress concentration regions |
| 06/27/2012 | CN102518452A Rapid and safe arch supporting method in process of passing through top-coal caving region |
| 06/20/2012 | CN102505949A Support method for coal seam roadway to cross gob |
| 06/13/2012 | CN102493823A Mine recyclable steel cylinder packing pier column and construction method thereof and method for gob-side entry retaining |
| 05/30/2012 | CN202250119U Totally-enclosed U-shaped shed support frame for roadway supporting |
| 05/23/2012 | CN102465706A 倾斜层状岩体的沿脉采准巷道的开凿方法 Tilt layered rock along veins of Mining Roadway excavation methods |
| 05/23/2012 | CN102011597B Method and structure for supporting weak surrounding rocks of tunnel |
| 05/23/2012 | CN101906977B Method for preventing and treating large deformation and collapse of softrock tunnel |
| 05/09/2012 | CN202215268U Supporting structure for construction of hard rock large-section tunnel |
| 05/09/2012 | CN202215267U Artificial roof of coal mine underground polyester fibre reinforced plastic net |
| 05/09/2012 | CN202215249U Layering pack wall along for hollow entry retaining in solid filling coal mining |
| 05/09/2012 | CN102444414A Buckling member for I-steel tent |
| 05/09/2012 | CN101054905B Single side reverse-folding welding and edge-wrapping reinforced steel-plastic net and supersonic net edge folding-welding machine |
| 05/02/2012 | CN102434178A Mining forepoling net |
| 05/02/2012 | CN101725362B Composite support device of dynamic pressure softrock tunnel based on steel pipe concrete bracket |
| 04/25/2012 | CN202202879U 一种可调角度的临时支撑装置 An adjustable angle of the temporary support means |
| 04/25/2012 | CN102425438A 极近距离煤层群多采空区下巷道的支护方法 More mining group Seams empty area under the roadway support method |
| 04/25/2012 | CN102425437A 石炭系煤层开采顺槽巷道支护方法 Carboniferous coal roadway method Crossheading |
| 04/25/2012 | CN102425428A 巷道迎头极破碎顶板控制方法 Roadway head pole broken roof control method |
| 04/18/2012 | CN102418539A 软岩煤巷快速过构造掘进中的支护工艺 Soft Coal Roadway Driving fast over construction of Support Technology |
| 04/18/2012 | CN102418528A End ore-drawing caving mining technology with high efficient using steel concrete composite man-made false roofs |
| 04/18/2012 | CN101871218B 地下车站空间的非开挖施工方法及其弧形冻结管施工设备 Underground space station construction methods and trenchless pipe arc freeze construction equipment |
| 04/05/2012 | US20120082515 Roof and Rib Support Having Reverse C-Channel |
| 03/28/2012 | CN102392660A Three-dimensional pressure-relieving supporting method for prolonging service lives of deep soft rock supports |
| 03/21/2012 | CN102383857A Gob-side entry retaining process for solid-filling, coal-mining and laying gangue wall |
| 03/21/2012 | CN102383795A Comprehensive mechanical rock drift excavating process |
| 03/21/2012 | CN101864973B Method and apparatus for safety protection of temporary roof support |
| 03/20/2012 | US8137033 Mesh handling system for an underground mining machine and related methods |
| 03/07/2012 | CN202157814U 玻塑高强度复合格栅 Bose high-strength composite plastic grille |
| 02/15/2012 | CN102352761A Prestressed fish-bellied steel cable combined supporting structure for coal mine laneway |
| 02/01/2012 | CN202132059U 升降式前探梁挂钩 Hook lift before the probe beam |
| 01/11/2012 | CN202108529U Plastic protection grid |
| 01/04/2012 | CN102305091A Support structure for hard rock large-section tunnel construction, and construction method for support structure |
| 01/04/2012 | CN102305074A Flat-bottomed pillar sublevel caving method of reinforced concrete structure artificial roof |
| 12/28/2011 | CN102296974A 采场破碎顶板快速维护方法 Fast stope broken roof maintenance methods |
| 12/21/2011 | CN102287197A 一种地下工程岩爆处理的辅助装置及其处理方法 Assist device and method for processing of rock burst underground engineering process |
| 12/14/2011 | CN102278140A 一种固体充填采煤垒砌矸石墙沿空留巷法 A solid wall filled with coal gangue and assembled Gob - France |
| 12/14/2011 | CN102278128A 一种高水平应力不良岩层巷道支护工艺 One kind of high levels of stress bad rock roadway process |
| 12/07/2011 | CN202064977U 一种临时支护防片网装置 Preventing a temporary support network device |
| 12/07/2011 | CN202064976U 一种机载式掘进工作面迎头临时支护装置 Heading Face Airborne formula interim head support device |
| 11/30/2011 | CN202055850U 综掘巷道远程端面防护装置 Mechanized Roadway remote end face protective devices |
| 11/30/2011 | CN202055260U Pet凸点焊接格栅 Pet solder bump grid |
| 11/09/2011 | CN202031378U Pre-stressed hexagonal wire netting for works |
| 11/02/2011 | CN202023559U Comprehensive dig-anchor machine |
| 10/26/2011 | CN202017505U Pipe roof supporting device |
| 10/26/2011 | CN202017504U Mining steel-plastic composite woven net false roof |
| 10/19/2011 | CN102220868A Urban shallow buried large-section tunnel five-step excavating method |
| 10/05/2011 | CN102206378A Preparation technology of high strength net false roof for underground coal mining |
| 09/28/2011 | CN201991541U 无腿拱形棚 Legless arched shed |
| 09/21/2011 | CN101749034B Shoring method for prolonging service cycle of soft rock laneway |
| 09/14/2011 | CN102182482A Impact-resistant combined anti-pressure supporting system |
| 09/14/2011 | CN102182471A Advance support method for coal mine tunnel high-risk area |
| 09/14/2011 | CN102182466A Excavating method for jump-digging of double-side wall guide pit combined arch part of tunnel |
| 09/14/2011 | CN101761338B Gob-side entry retaining method of a solid filling coal mining half-section one-leg shed |
| 08/31/2011 | CN102171412A Method and apparatus for lining tunnel walls or ceilings with protective nets |
| 08/24/2011 | CN201943723U 一种锚杆机挂网装置 One kind of hanging device bolting machine |
| 08/24/2011 | CN201943710U 一种应用于窄煤柱留巷的支护装置 Applied to narrow coal pillar roadway support device |
| 08/17/2011 | CN102155248A Method for supporting laneway below coal pillar |
| 08/17/2011 | CN102155247A Pipe shed support device |
| 08/17/2011 | CN102155246A Temporary support defense network device |
| 08/17/2011 | CN102155219A Comprehensive dredging machine |
| 08/17/2011 | CN102153921A Paint for coal mine underground polyester fiber reinforced plastic net false roof |
| 08/10/2011 | CN201924946U 一种支护机的铰接结构 An articulated structure supporting machine |
| 07/27/2011 | CN102135005A Method for supporting roof of roadway under coal pillar and gob transition section |
| 07/20/2011 | CN201902216U Passage supporting device |
| 07/20/2011 | CN102128040A Hydraulic striding-type advanced-support equipment |
| 07/20/2011 | CN102128038A Quick construction method for tunnel pipe shed |
| 07/13/2011 | CN201896624U Improved anchor rod ladder beam |
| 06/22/2011 | CN201874594U Lapping-assisting device for continuous-mining roof bolter |
| 06/08/2011 | CN201857982U Automatic top net laying device |
| 06/01/2011 | CN201851140U Three-level protective net device for hydraulic support |
| 06/01/2011 | CN201851138U Check valve controlled hydraulic heightening support |
| 06/01/2011 | CN201851129U Light type shield type temporary support facility for roadway excavation |
| 05/25/2011 | EP2324200A2 Method and apparatus for lining tunnel walls or ceilings with protective nets |
| 05/25/2011 | CN201843629U Fiber mesh device used for controlling top plate |
| 05/25/2011 | CN201843628U Underground support net |
| 04/20/2011 | CN201802428U Temporary support device for coal mine heading |
| 04/20/2011 | CN201802427U Fastener used for I-type steel tent |
| 04/20/2011 | CN201801712U Fiberglass composite wall-protective mesh |
| 04/13/2011 | CN201794598U Foldable metal net |
| 04/13/2011 | CN102011597A Method and structure for supporting weak surrounding rocks of tunnel |
| 04/06/2011 | CN201786369U Temporary support for rapid construction of tunnel |
| 03/23/2011 | CN201771523U Mine movable hoisting ring |
| 03/23/2011 | CN201771522U Glass-plastic composite grating |
| 03/16/2011 | CN201763364U Safety protection frame for drilling operating platform |
| 02/16/2011 | CN201747389U Support steel arch frame structure for excavation of upper half part of tunnel |
| 02/02/2011 | CN201730632U Floor type front canopy support |
| 01/12/2011 | CN201705375U Four-column chock-shield large-mining-height mesh-laying hydraulic support |
| 01/12/2011 | CN201705374U Two-leg shield type mesh laying hydraulic support with large mining height |
| 01/12/2011 | CN201705372U Nonmetal suspension type temporary support device for drivage |
| 01/12/2011 | CN1619105B Apparatus for safety protection of temporary roof support |
| 12/29/2010 | CN201687497U Quick wire mesh laying device for shield supports in last cutting stope of fully mechanized mining face |
| 12/29/2010 | CN201687493U Multifunctional forepoling bar |
| 12/08/2010 | CN101906977A Method for preventing and treating large deformation and collapse of softrock tunnel |