| Patents for E21D 19 - Provisional protective covers for working space (559) |
|---|
| 07/17/2013 | CN103206231A Protecting device of coal mine blasting driving working surfaces |
| 07/17/2013 | CN102155219B Comprehensive dredging machine |
| 07/10/2013 | CN203050743U Corrosion-resistant strength steel bar supporting and protecting net |
| 07/10/2013 | CN102392660B Three-dimensional pressure-relieving supporting method for prolonging service lives of deep soft rock supports |
| 07/10/2013 | CN102305074B Flat-bottomed pillar sublevel caving method of reinforced concrete structure artificial roof |
| 07/03/2013 | CN203035209U Polyester fiber support false roof web for coal mine |
| 07/03/2013 | CN203035208U Spacing strip type support false roof web for coal mine |
| 06/26/2013 | CN203022777U Shed erection support at underground fork or tunnel opening |
| 06/26/2013 | CN203022776U Temporary supporting device for heating faces |
| 06/19/2013 | CN203008934U Working-face crossheading belt plate supporting device |
| 06/19/2013 | CN102220868B Urban shallow buried large-section tunnel five-step excavating method |
| 06/12/2013 | CN202991073U Protective device |
| 06/05/2013 | CN103133021A Laying method of metal mesh false roof |
| 05/29/2013 | CN202954828U Active-protection support device with anchor rods |
| 05/29/2013 | CN202954827U Metal mesh piece connected by welding |
| 05/29/2013 | CN102182471B Advance support method for coal mine tunnel high-risk area |
| 05/22/2013 | CN102518456B Method for maintaining roof of composite bed under stress concentration regions |
| 05/08/2013 | CN202926352U Mining tensioning device for diamond metal net |
| 05/08/2013 | CN202926351U Fixing peg of protective screen |
| 05/08/2013 | CN202926350U Novel U-shaped shed support device |
| 05/01/2013 | CN202914115U Large dip angle lapping hydraulic support frame |
| 05/01/2013 | CN102182466B Excavating method for jump-digging of double-side wall guide pit combined arch part of tunnel |
| 04/24/2013 | CN202900292U Novel retaining and protecting device used in underground coal mine |
| 04/24/2013 | CN103061806A Composite roof thin seam fully-mechanized coal mining face gob-side entry retaining method |
| 04/24/2013 | CN103061771A Remining mine fully-mechanized coal mining face open-off cut tunneling process and supporting method |
| 04/17/2013 | CN202882960U Temporary support device for anchor net roadway |
| 04/10/2013 | CN103032085A Application and construction process of tunnel head-on wall carving prevention net |
| 04/10/2013 | CN102155246B Temporary support defense network device |
| 04/03/2013 | CN103016033A Working face crossheading belt plate supporting device |
| 04/03/2013 | CN103016019A Heading and anchoring integrated machine |
| 04/03/2013 | CN103016008A Mining stopping method for downwards mined underlying seams of coal seam group |
| 03/27/2013 | CN202832587U Pneumatic temporary support device |
| 03/27/2013 | CN102996147A Coal mine underground roadway driving temporary supporting wall structure |
| 03/20/2013 | CN202810878U Sloughing preventing device |
| 03/20/2013 | CN102979540A Method for hooking anchor nets with chain nets |
| 03/06/2013 | CN202768027U Quick heading temporary shoring system matched and used with heading machine |
| 02/28/2013 | US20130051931 Impact resistant cambered lagging element |
| 02/20/2013 | CN202745900U Improved steel bar ladder beam |
| 02/20/2013 | CN202745881U Goaf-side entry retaining wall body |
| 02/13/2013 | CN202731952U Pulling plate for reinforcing U-shaped steel shed in coal mine under-tunnel |
| 02/13/2013 | CN202730818U Shed supporting mechanism installed on loader-digger |
| 02/13/2013 | CN101886547B Two-pier shielding type large mining height lapping hydraulic bracket |
| 02/13/2013 | CN101871355B Four post support shield type large mining height mesh-placement hydraulic support |
| 01/30/2013 | CN202707094U Multifunctional high strength front canopy device |
| 01/30/2013 | CN202707093U Temporary support system for tunnel construction |
| 01/30/2013 | CN202707092U Plastic coating composite metal net used for underground timbering in coal mine |
| 01/30/2013 | CN102900445A Temporary supporting device for anchor net roadway |
| 01/29/2013 | CA2569323C Rock drilling rig, service platform connected to a rock drilling rig and a roof for a service platform |
| 01/23/2013 | CN202690093U Iron core plastic composite mesh grid false roof for underground coal mine |
| 01/23/2013 | CN202690044U Comprehensive mechanized rock roadway tunneling unit |
| 01/16/2013 | CN102153921B Paint for coal mine underground polyester fiber reinforced plastic net false roof |
| 01/09/2013 | CN202659264U Wall-caving-resistant structure of coal mine anchor rod for supporting and protecting coal roadway driving work face |
| 01/09/2013 | CN102865080A Induced fracture engineering arrangement and non-blasting mining process for high-geostress hard rock |
| 01/02/2013 | CN202645598U High strength steel-plastic composite woven false top network |
| 01/02/2013 | CN202645597U Plastic geogrid in the shape of a Chinese character "tian" |
| 01/02/2013 | CN202645555U Fully-sealed coal roadway heading-anchoring synchronizer |
| 12/26/2012 | CN202628128U Lapping operator protection device of rear lapping support |
| 12/12/2012 | CN202596752U Pentagonal plastic geogrid |
| 12/12/2012 | CN102128040B Hydraulic striding-type advanced-support equipment |
| 12/05/2012 | CN202578727U Fault crossing tilting-preventive shed device for return air gateway |
| 12/05/2012 | CN202578726U U-shaped shed support in-binding structure |
| 11/28/2012 | CN202560268U Reinforcing mesh processing fixing device for coal mine underground support |
| 11/28/2012 | CN202560267U Coal mine underground convenient-installation steel bar mesh for supporting |
| 11/28/2012 | CN102797492A Arrangement method for precracking roof for roof-cutting roadway |
| 11/21/2012 | CN102787854A Forepoling method used in tunneling of weak cemented soft rock roadway |
| 11/14/2012 | CN102777182A Rapid end extracting method of large mining height working face |
| 11/08/2012 | US20120282041 Yieldable cambered arch support assembly |
| 11/07/2012 | CN202520339U Novel mine supporting fake roof |
| 10/31/2012 | CN202510144U Mining heavy-duty two-way stretch net |
| 10/24/2012 | CN202500589U Ladder beam for anchor rod support |
| 10/24/2012 | CN202500588U Supporting mesh for carbon spring steel wire |
| 10/24/2012 | CN102155248B Method for supporting laneway below coal pillar |
| 10/17/2012 | CN102733834A Roof supporting method |
| 10/17/2012 | CN102733833A Supercharging outburst prevention device for tunneling surface |
| 10/17/2012 | CN102733832A Support method for extra-thick broken coal seam employing nest anchored ropes |
| 10/17/2012 | CN102733820A Gob-side entry retaining support wall and integrated construction method thereof |
| 10/10/2012 | CN202483599U Bracket for punching of subway station passageway rail-supporting wall |
| 10/10/2012 | CN102720498A Gob-side entry retaining mining process for coal face |
| 10/03/2012 | CN202467875U Mining anchor pole supporting ladder beam |
| 10/03/2012 | CN202467874U Anchor pole supporting ladder beam without welding structure |
| 10/03/2012 | CN102704965A Method for preventing tunnel top plate collapse risk caused by severe mining |
| 10/03/2012 | CN102704939A Combined steel temporary supporting excavation method for tunnel with extra-large section |
| 10/03/2012 | CN102704927A Comprehensive mechanization stone drift heading machine set |
| 09/19/2012 | EP2500514A2 Method and device for expansion work during tunnel construction |
| 09/19/2012 | CN202441392U Steel temporary inverted arch capable of being fast assembled and disassembled for tunnel |
| 09/05/2012 | CN202417547U Sliding front canopy |
| 09/05/2012 | CN202417546U Collapse prevention device for roadways of I-shaped steel sheds |
| 09/05/2012 | CN202417545U Support structure for mine emergency rescue |
| 09/05/2012 | CN102654055A Construction method for compound construction of large-scale underground space structure by holes, groove and piles |
| 08/29/2012 | CN202402051U Steel wire shoring mesh for mines |
| 08/15/2012 | CN102635353A Double-cantilever hard rock coal roadway heading and anchoring device |
| 08/01/2012 | CN202360117U Mining forepoling net |
| 08/01/2012 | CN202360116U U-shaped shed roadway junction support device |
| 07/25/2012 | CN202348298U Tunneling and anchoring machine |
| 07/25/2012 | CN102606162A Quick construction method for weak surrounding rock shallowly-buried easily-collapsed area of tunnel |
| 07/25/2012 | CN102606159A Medium thick heavy-pitch crushed ore body frame type artificial top downward segmenting cemented filling method |
| 07/25/2012 | CN102135005B Method for supporting roof of roadway under coal pillar and gob transition section |
| 07/18/2012 | CN102587922A Oblique-crossing inclined shaft upper arc guide top brushing construction method for soft crushed rock layer |
| 07/11/2012 | CN202325575U 隧道内长管棚 Long tube tunnels |
| 07/11/2012 | CN202325574U 煤矿用钢塑复合防护网 Plastic composite coal mine safety net |