| Patents for E21D 21 - Anchoring-bolts for roof, floor, or shaft-lining protection (4,377) |
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| 12/11/2013 | CN203335106U Mining cellular net |
| 12/11/2013 | CN203335105U Anchor rod with external expansion devices |
| 12/11/2013 | CN203335104U Anchor stock mechanism for roadway support |
| 12/11/2013 | CN203335103U Anchor rod device |
| 12/11/2013 | CN203335102U Multi-section steel pipe dislocation type shearing anchor rod |
| 12/11/2013 | CN102587936B Fully-enclosed integral assembly grid concrete support method |
| 12/10/2013 | US8602691 Locking mechanism |
| 12/05/2013 | WO2013079254A3 Anchor, especially a rock anchor |
| 12/04/2013 | CN203321558U Conic pillar-shaped anchor rod |
| 12/04/2013 | CN203321557U Truss combined anti-slide anchor rod |
| 12/04/2013 | CN203321556U Supporting rod |
| 12/04/2013 | CN203321555U Supporting system for large cross section tunnel construction in soft geological environment |
| 12/04/2013 | CN103422890A Novel anchor rod pulling resistance alarm and using method thereof |
| 12/04/2013 | CN103422873A Strong-strength extendable anchor rod |
| 12/04/2013 | CN103422872A 锚杆装置 Bolt device |
| 12/04/2013 | CN102434179B Deformation anchor cable capable of increasing resistance continuously |
| 12/04/2013 | CN102206404B Coated mining bolt |
| 11/28/2013 | WO2013173901A1 Rock bolt and method of installing a rock bolt |
| 11/28/2013 | WO2012101433A3 Drilling device for percussion or rotary percussion drilling having a coupling sleeve |
| 11/28/2013 | DE102012208736A1 Gesteinsanker Rock bolts |
| 11/27/2013 | EP2666960A2 Blast protection for a convergence bolt |
| 11/27/2013 | CN203308487U Expansion type recyclable anchor rod |
| 11/27/2013 | CN103410544A Large-diameter high-pressure-resistant hollow fiber reinforced plastic anchor rod and production process thereof |
| 11/27/2013 | CN103410543A Pressure yielding internally-grouted anchor cable |
| 11/27/2013 | CN103410542A Device and method for improving roadway base plate anchor rod anchor cable pore-forming efficiency and anchoring performance |
| 11/21/2013 | WO2013108051A3 Device for a drainage boring system |
| 11/21/2013 | WO2013072143A3 Rock anchor |
| 11/20/2013 | CN203296794U Yielding extensible fiber reinforced plastic anchor rod |
| 11/20/2013 | CN203296043U High-strength pre-stressed anchor rod |
| 11/20/2013 | CN103397881A Engineering method for enlarging mining area of chambers |
| 11/19/2013 | CA2733829C Rock anchor cable |
| 11/12/2013 | US8579550 Truss shoe for use with a threaded rod |
| 11/07/2013 | US20130294845 Dry grout composition and capsule for anchoring reinforcing member, dowel or anchor elements |
| 11/07/2013 | US20130294844 Anchoring device |
| 11/06/2013 | CN203271788U Slope reinforcing structure of artificial boundary pillar in open-pit to underground mining |
| 11/06/2013 | CN203271787U Improved high pre-stressed anchor cable steel strand structure |
| 11/06/2013 | CN203271786U Advanced support structure for tunnel excavation |
| 11/06/2013 | CN203271762U Concrete band support system device of tunnel type paved coal conveying pipeline |
| 11/06/2013 | CN203271761U Roadway reinforcing and supporting structure capable of effectively reducing cost |
| 11/06/2013 | CN103382847A Prestressed drilling, anchoring and grouting anchor cable and support method |
| 10/31/2013 | WO2013160103A2 Strand anchor |
| 10/30/2013 | EP2655799A1 Rock bolt |
| 10/30/2013 | EP2655798A1 Rock bolt |
| 10/30/2013 | CN203257444U Compressible base plate device |
| 10/30/2013 | CN203257443U Anchor cable jacket |
| 10/30/2013 | CN203257442U Anchor rod/anchor rope with leakproof plug of rubber for anchoring |
| 10/30/2013 | CN203257441U Device for accurately applying axial force on anchor rod |
| 10/30/2013 | CN203257440U Double-tower type anchoring tray |
| 10/30/2013 | CN102296976B Asymmetrical bolt-net-cable combined supporting method for special-shaped recovery tunnel of large inclination angle coal bed |
| 10/24/2013 | WO2013157686A1 Rock bolt and hydraulic pressure apparatus using same |
| 10/24/2013 | DE102012206613A1 Litzenanker Strand |
| 10/23/2013 | CN203248179U Seat plate adjustable prestress anchor rod device |
| 10/23/2013 | CN203248178U Downward-hole self-drilling grouting anchor rod |
| 10/23/2013 | CN203248177U Pressure avoidable type liner plate device |
| 10/23/2013 | CN103362526A Steel stranded wire anchor rod |
| 10/23/2013 | CN102337903B Method of active coupling support in time and space for control of minimum deformation of surrounding rock of deep well roadway |
| 10/23/2013 | CN102305082B Method for relieving and cutterhead repairing of shield machine in weathering groove |
| 10/23/2013 | CN102296974B Rapid maintaining method for broken roof in stope |
| 10/17/2013 | WO2013152393A1 Rock bolt resin mixer |
| 10/16/2013 | CN203239395U Intelligent anchor rod early warning and monitoring system for roadway surrounding rock disaster |
| 10/16/2013 | CN203239372U Anchor rod subsection control retaining and protecting device for large-deformation roadway |
| 10/16/2013 | CN203239371U Pressure and displacement yielding anchor rod layered retaining and protecting device for large-deformation roadway |
| 10/16/2013 | CN203239370U Hard roof dislocation anti-shearing reinforced anchor rod |
| 10/16/2013 | CN203239369U Improved expanding end anchor device |
| 10/16/2013 | CN203239368U Hollow slip casting anchor rod adopting blasting reaming technology |
| 10/16/2013 | CN203239367U T type thorn anchor rod |
| 10/16/2013 | CN203239356U Supporting and protecting device applied to deep development roadway |
| 10/16/2013 | CN102536282B Method for preventing and controlling bottom heaving disaster of mine stoping tunnel |
| 10/16/2013 | CN101784753B Hollow rock bolt, self -drilling rock bolt and method of forming a hollow rock bolt |
| 10/15/2013 | US8556542 Cuttable drilling tool, and a cuttable self drilling rock bolt |
| 10/09/2013 | EP2647792A2 Manufacture of cable bolts |
| 10/09/2013 | CN203230447U Prestressed energy absorption anchor rod cable |
| 10/09/2013 | CN203230446U Expansion-shell prestressed coal mine energy-absorption shoring anchor rod |
| 10/09/2013 | CN203230445U Length-changeable self-boring type grouting anchor rod |
| 10/09/2013 | CN203230444U Stress dispersion anchor rod supporting plate |
| 10/09/2013 | CN203230443U Novel case expanding reverse wedging type slip casting anchor rod |
| 10/09/2013 | CN203230442U Coal wall reinforcing structure of high cutting and overhand inclined working face |
| 10/09/2013 | CN103343696A Anchor plug pushing device used for anchor cable supporting structure and anchor cable supporting structure |
| 10/09/2013 | CN102182484B Anchor-bamboo combination support method for underground mining |
| 10/08/2013 | CA2536237C Drilling apparatus, method, and system |
| 10/02/2013 | CN203223237U Novel two-way deformable anchor rod |
| 10/02/2013 | CN203223236U Anchor rod tray |
| 10/02/2013 | CN203223235U Double-K type steel belt for anchoring |
| 10/02/2013 | CN203223228U Coal mine roadway supporting and reinforcing structure |
| 10/02/2013 | CN103334780A Expansion shell type constant-resistance pre-stressed anchoring bolt |
| 10/02/2013 | CN102392457B Friction type resin anchor rod and installation method thereof |
| 10/02/2013 | CN101535597B Drilling tool, self -drilling rock bolt, drill bit, ancoring device for self -drilling rock bolt, shaft for drilling tool and end coupling for drilling tool |
| 10/02/2013 | CA2810887A1 Manufacture of cable bolts |
| 09/25/2013 | CN203214082U Novel hollow grouting anchor bolt |
| 09/25/2013 | CN203214081U Self-propelled hollow anchor rod |
| 09/25/2013 | CN103321664A Anchoring device and anchor rod structure |
| 09/18/2013 | CN103306695A Spiral fin grouting anchor cable assembly with adjustable angle |
| 09/18/2013 | CN103306682A Long-span and high-side-wall underground space building and excavation support method thereof |
| 09/18/2013 | CN102383806B Construction technology for allowing tunnel to pass through ultra-large karst cave |
| 09/18/2013 | CN102226406B Construction method of super-long advanced anchor bars |
| 09/12/2013 | US20130236252 Dome headed roof bolt |
| 09/12/2013 | US20130236251 Rock bolt sealing system |
| 09/12/2013 | US20130236250 Fiberglass Roof and Rib Plate |
| 09/12/2013 | DE102012203696A1 Gesteinsanker Rock bolts |
| 09/11/2013 | CN203188209U Anchor head wale structure |