| Patents for E21D 21 - Anchoring-bolts for roof, floor, or shaft-lining protection (4,377) |
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| 08/26/2009 | CN100532789C Rock anchor rod |
| 08/26/2009 | CN100532786C Digging method for shallow underground hole |
| 08/26/2009 | CN100532738C Continuous realizing method of underground engineering |
| 08/21/2009 | CA2621609A1 Resin releasing mechanism and method of application |
| 08/20/2009 | WO2009101454A1 Tie rod for structural projects |
| 08/19/2009 | CN201292856Y Tube seam type anchor rod |
| 08/19/2009 | CN201292855Y Cable tool |
| 08/19/2009 | CN201292854Y Small cable for supporting mining preparation roadway |
| 08/19/2009 | CN201292852Y Coal mine tunnel structure |
| 08/19/2009 | CN101509386A Composite support anchor rod and construction method thereof |
| 08/19/2009 | CN100529331C Rockbolts made of high strength steel pipes and method of manufacturing thereof |
| 08/12/2009 | EP2087203A1 Improved sliding anchor |
| 08/12/2009 | CN201288576Y Strengthening steel belt for top board support |
| 08/12/2009 | CN101506468A Improved sliding anchor |
| 08/12/2009 | CN101506467A A tensioning device |
| 08/12/2009 | CN101503959A Gob-side entry retaining support method |
| 08/12/2009 | CN100526564C Rotating anchor rod of a rod and construction method thereof |
| 08/06/2009 | WO2009097261A1 Resin grouts for anchor systems |
| 08/06/2009 | WO2009094725A1 Rock bolt assembly |
| 08/06/2009 | CA2712293A1 Rock bolt assembly |
| 08/05/2009 | EP2085521A1 Soil or rock anchor with an anchor pull made of one or more individual elements with corrosion protected anchor head design |
| 08/05/2009 | CN101498223A High-strength pretightening force compressible glass fibre reinforced plastic anchor rod |
| 07/30/2009 | WO2009092630A1 Anchor tube and method for production thereof |
| 07/30/2009 | US20090191006 Resin Mixing and Cable Tensioning Device and Assembly for Cable Bolts |
| 07/30/2009 | US20090191005 Ground anchor or rock anchor with an anchor tension member comprised of one or more individual elements with corrosion-protected anchor head design |
| 07/30/2009 | CA2713190A1 Anchor tube and method for production thereof |
| 07/29/2009 | CN100519992C Supporting installation in underground mining of coal mine |
| 07/29/2009 | CN100519991C Method and device for installing a self-drilling expandable rock bolt and a self-drilling rock bolt |
| 07/28/2009 | US7566189 Mine roof bolt with resin control surface |
| 07/23/2009 | DE202009004329U1 Tunnelschirm aus bodenähnlichen Ersatzbaustoffen Tunnel shield from soil-like replacement construction materials |
| 07/22/2009 | CN101487396A Statically indeterminate equal-strength support anchor cable locking mechanism and method |
| 07/21/2009 | CA2340371C Tubular anchor(ii) |
| 07/16/2009 | US20090180840 Dome headed roof bolt |
| 07/15/2009 | CN101482024A Full-thread fiber-reinforced thermoplastic plastics anchor bar and its processing technique |
| 07/02/2009 | WO2009079684A1 Self drilling rock bolting |
| 07/01/2009 | CN201265424Y Anchor bar tray |
| 06/17/2009 | CN101457651A Filling stack advanced support method along empty tunnel in coal-gas co-milling Y-shaped ventilating system |
| 06/10/2009 | CN201254998Y Anchor rod and special fixture matched with the anchor rod |
| 06/10/2009 | CN100497887C Bush bulging shell type self-drilling hollow anchor rod |
| 06/04/2009 | DE102007057763A1 Selbstbohrender Verbundanker A self Xings |
| 06/03/2009 | CN201250660Y Support steel strip for assembled anchor bar |
| 06/03/2009 | CN101446202A Self-boring compound anchor |
| 06/02/2009 | CA2484939C Method for production of a mining metal plug |
| 05/29/2009 | CA2645433A1 Expansion anchor |
| 05/28/2009 | WO2009066246A2 Hydraulically inflatable rock anchor with pressure indicator |
| 05/28/2009 | US20090136302 Tensionable spiral bolt with resin nut and related method |
| 05/28/2009 | CA2706468A1 A rock anchor |
| 05/26/2009 | CA2342507C Tubular anchor(iii) |
| 05/22/2009 | WO2007021652A3 System and method for mine roof counter bore and cable bolt head securement therein |
| 05/20/2009 | CN201241719Y Anchorage cable head sheath |
| 05/20/2009 | CN201241712Y Primary support structure of large deformation formation tunnel |
| 05/20/2009 | CN101435199A Fiber-reinforced plastic anchored net and machining process |
| 05/14/2009 | WO2009061872A1 Powder-actuated mechanical lock concrete anchor |
| 05/14/2009 | WO2008060212A8 A drilling tool, a self -drilling rock bolt, a drill bit, an ancoring device for a self -drilling rock bolt, a shaft for a drilling tool and an end coupling for a drilling tool |
| 05/14/2009 | CA2703627A1 Powder-actuated mechanical lock concrete anchor |
| 05/13/2009 | CN201236719Y Arc-connection locker for girder anchor cable |
| 05/13/2009 | CN201236718Y Inner slip-casting anchor cable |
| 05/13/2009 | CN201236717Y Yielding device |
| 05/13/2009 | CN201236422Y Self-protecting anchorage capable of generating plastic deformation |
| 05/08/2009 | CA2641637A1 Method of attachment of a towing anchor to an iceberg |
| 05/06/2009 | CN201232559Y Rubber ball cable head jacket |
| 05/06/2009 | CN201232558Y Fully-mechanized mining cutting hole full-section anchored net support |
| 05/06/2009 | CN101424190A Special-shaped wall integral anchor rod |
| 04/29/2009 | EP2052130A1 A tensioning device |
| 04/29/2009 | CN100482899C Wedge assembly and internal anchorage using same |
| 04/22/2009 | CN201225162Y High strength anchor beam for supporting anchor rod |
| 04/22/2009 | CN101413397A Self drilling rock bolt |
| 04/08/2009 | CN201218105Y Mine tunnel digging support component |
| 04/01/2009 | CN101397911A Rock bolt |
| 03/31/2009 | US7510351 Method for supporting a subsurface material |
| 03/25/2009 | CN201212399Y Fiber-reinforced plastic anchor rod fastening device |
| 03/25/2009 | CN101392655A Resin plastic combined recoverable anchor rod |
| 03/25/2009 | CN101392654A Shield tunnel segment lining-anchor rod structure system |
| 03/19/2009 | US20090074517 End Coupling for a Rock Bolt |
| 03/19/2009 | US20090074516 Self Drilling Rock Bolt |
| 03/18/2009 | CN201209455Y Pre-stress flexible anchoring bolt body and the anchor rod |
| 03/18/2009 | CN201209251Y High intensity smooth and round anchor rod |
| 03/18/2009 | CN101389827A Injection bolt with a fixed static mixer |
| 03/12/2009 | US20090067932 Re-tensionable cable bolt apparatus and related method |
| 03/11/2009 | EP2034129A2 Method of consolidation, impermeabilisation and drainage of underground works by guided perforations |
| 03/11/2009 | CN201206470Y Yield press anchor cable |
| 03/05/2009 | WO2009029013A1 Rock bolt with mechanical anchor |
| 03/05/2009 | WO2009029012A1 Hollow rock bolt, self -drilling rock bolt and method of forming a hollow rock bolt |
| 03/05/2009 | CA2695771A1 Rock bolt with mechanical anchor |
| 03/05/2009 | CA2695766A1 Hollow rock bolt, self -drilling rock bolt and method of forming a hollow rock bolt |
| 03/04/2009 | CN201202484Y Anchor rod |
| 03/04/2009 | CN201202483Y Self-locking type anchor rod prestress control device |
| 03/04/2009 | CN201202482Y Front cantilever anchorage cable supporting and protecting device |
| 03/04/2009 | CN201202182Y Hot rolling channel steel |
| 03/04/2009 | CN201202117Y Pawl type self locking anchor rod and cable |
| 03/04/2009 | CN100465412C A quick water blocking device and a water blocking method in anchor cable holes |
| 02/26/2009 | WO2009023922A1 Friction bolt assembly |
| 02/26/2009 | US20090052995 Arrangement for injecting and affixing a reinforcing or anchoring element in a rock wall |
| 02/26/2009 | CA2697022A1 Friction bolt assembly |
| 02/25/2009 | EP2027366A1 Fiber-reinforced plastic drilling anchor |
| 02/25/2009 | CN201198763Y Cementing type recoverable plastic anchor rod |
| 02/24/2009 | US7494300 Ice anchor |
| 02/19/2009 | WO2009021402A1 A nut-tray assembly for an anchoring-bolt of fiber glass |
| 02/18/2009 | CN201195188Y Bird's nest type anchorage terminal shaping apparatus for mining anchor cable |
| 02/05/2009 | US20090035071 Friction tube anchor and inflation adapter for the latter |