| Patents for E21D 21 - Anchoring-bolts for roof, floor, or shaft-lining protection (4,377) |
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| 08/17/2011 | CN102155228A Fully-segmented presplitting squeezing primary-blasting mining method |
| 08/17/2011 | CN101076651B Method for casing drilling and drilling unit |
| 08/10/2011 | EP2354448A2 Self-drilling anchor with drill anchor seal |
| 08/10/2011 | CN201924948U 膨胀式开缝锚杆 - Expansion slotted bolt |
| 08/10/2011 | CN201924947U 一种可伸长锚杆 One kind can be elongated bolt |
| 08/10/2011 | CN201924356U 一种可拆卸锚杆 One kind of detachable anchor |
| 08/10/2011 | CN201924355U Binding carbon fiber anchor cable anchor device |
| 08/10/2011 | CN102146802A Front exploring beam for heading surface anchor rod support |
| 08/10/2011 | CN102146797A Short-section temporary gob-side entry retaining method |
| 08/10/2011 | CN102146673A Anchoring structure for liquid-injection corrosion-resistant anchor rod or anchor cable and construction method thereof |
| 08/10/2011 | CN101634231B Method for reinforcing and sealing coal mine and preventing gas |
| 08/10/2011 | CN101487396B Statically indeterminate equal-strength support anchor cable locking mechanism and method |
| 08/03/2011 | CN201915977U 锚杆安全垫圈 Bolt safety washer |
| 08/03/2011 | CN201915842U 锚杆钻头 Anchor drill |
| 08/03/2011 | CN102140925A Expansion type high-strength anchor rod |
| 08/03/2011 | CN102140924A Double-shell coupling supporting method of deep soft rock tunnel |
| 08/03/2011 | CN102140796A Intelligent fiber reinforced plastic (FRP) anchor rod |
| 08/02/2011 | CA2660496C Improved sliding anchor |
| 07/27/2011 | CN201908670U Anchorage device with prestressed anchor rod |
| 07/27/2011 | CN201908669U Thread anchor stock |
| 07/27/2011 | CN201908668U Novel tree-shaped anchor rod for mines |
| 07/27/2011 | CN102135005A Method for supporting roof of roadway under coal pillar and gob transition section |
| 07/27/2011 | CN102134997A Rock drilling machine and pipe roof anchor rod connector |
| 07/21/2011 | US20110176876 Method and system for punctual fastening a waterproofing membrane to hydraulic works |
| 07/20/2011 | EP1987230B1 Injection bolt with a fixed static mixer |
| 07/20/2011 | CN201902219U Novel high-strength anchor rod nut |
| 07/20/2011 | CN201902218U Anchor rod and anchor cable supporting device |
| 07/20/2011 | CN201902216U Passage supporting device |
| 07/20/2011 | CN102128039A Drilling rod belt-feeding type prestress anchor rod and use method thereof |
| 07/20/2011 | CN102128035A Construction method of bilateral biased small-clear distance tunnel |
| 07/13/2011 | CN201896624U Improved anchor rod ladder beam |
| 07/13/2011 | CN201896623U Pipe curtain device for penetration of deep lane of coal mine through fault and fracture zone |
| 07/13/2011 | CN201896622U Adjustable torque multiplier |
| 07/13/2011 | CN101532292B Construction process for jet grouting anchor rod |
| 07/12/2011 | CA2458948C A yielding rock bolt |
| 07/07/2011 | WO2011079829A2 Expansion rock anchor |
| 07/07/2011 | WO2011020696A3 Coupling for connecting anchor rods |
| 07/06/2011 | CN102116162A Tension dispersed anchor cable for coal mine and anchoring method thereof |
| 06/30/2011 | WO2011075810A1 Anchor tendon with selectively deformable portions |
| 06/30/2011 | CA2785245A1 Anchor tendon with selectively deformable portions |
| 06/29/2011 | EP1888878B1 Method and device for drilling, particularly percussion drilling or rotary percussion drilling a hole in soil or rock material |
| 06/29/2011 | CN201884039U Three-sided longitudinal rib-less deformed steel bar metal bolt body |
| 06/29/2011 | CN102108874A Tensile cross grouting anchor rod device |
| 06/29/2011 | CN102108704A Vibration balancing anchor device |
| 06/29/2011 | CN102108703A Adjustable prestressed anchoring device |
| 06/29/2011 | CN102108198A Manufacturing method of compound material supporting plate |
| 06/23/2011 | WO2010060122A9 Rock bolt component |
| 06/22/2011 | CN102102526A Coal mine roadway supporting method and working face hole-cutting anchor mesh ladder and individual supporting device used by same |
| 06/22/2011 | CN101666093B Quake-proof anchor rope |
| 06/21/2011 | US7963725 Rock bolt |
| 06/16/2011 | US20110142549 Re-tensionable Cable Bolt Apparatus and Related Method |
| 06/16/2011 | US20110142548 End Coupling for a Rock Bolt |
| 06/15/2011 | CN201865681U Clamp hoop type bamboo anchor rod |
| 06/15/2011 | CN102094675A Safe moving and withdrawing method of complex-structured thick coal seam fully mechanized heavy equipment |
| 06/15/2011 | CN102094662A Friction sleeve type large deformation anchor rod |
| 06/15/2011 | CN102094660A Integral high-strength flexible support method of roadway at large-inclined angle coal-seam longwall mining section |
| 06/15/2011 | CN101506468B Improved sliding anchor |
| 06/15/2011 | CN101305161B Self drilling rock bolt |
| 06/14/2011 | US7959379 Bolt anchor |
| 06/09/2011 | WO2011067797A1 Method and plant for producing a fiberglass profile to be used as reinforcing element for strengthening an excavation wall |
| 06/09/2011 | WO2011067738A1 Method and plant for producing a fiberglass profile to be used as reinforcing element for strengthening an excavation wall |
| 06/09/2011 | US20110135402 Rock anchor cable |
| 06/09/2011 | CA2781502A1 Method and plant for producing a fiberglass profile to be used as reinforcing element for strengthening an excavation wall |
| 06/08/2011 | CN201857612U Extending-elastic rock-burst-resistant anchor rod |
| 06/08/2011 | CN102086770A Cone resistive friction sleeve large-deformation anchor rod |
| 06/08/2011 | CN101346517B Friction bolt |
| 06/08/2011 | CN101198764B Fluid recovery |
| 06/01/2011 | CN201851129U Light type shield type temporary support facility for roadway excavation |
| 05/25/2011 | CN102071955A Soft outburst coal seam tunneling reserved coal body reinforcement and outburst-proof method |
| 05/19/2011 | WO2011057349A1 Cable bolt plug |
| 05/18/2011 | CN201835848U Extensible glass fiber reinforced plastic metal combined anchor rod |
| 05/18/2011 | CN201835847U Ultralong anchor rod |
| 05/18/2011 | CN201835846U Nest type anchor cable |
| 05/18/2011 | CN201835748U Jumbolter with rear-mounted impact mechanism |
| 05/18/2011 | CN201835280U Limiting device for anchorage length of grouting anchor cable |
| 05/12/2011 | WO2011054722A1 Torque multiplier |
| 05/12/2011 | WO2010140006A3 Nchoring bolt having an extruding piston |
| 05/12/2011 | WO2010092405A3 Securing method for horizontal and inclined workings |
| 05/12/2011 | CA2791524A1 Method for drilling, in particular percussion or rotary percussion drilling, holes in soil or rock material, and device therefor |
| 05/11/2011 | EP2318659A1 Rock anchor cable |
| 05/11/2011 | CN201826874U Claw-type recyclable alarm anchor rod |
| 05/11/2011 | CN201826873U Small-pitch equal-strength metal rod body of resin anchor rod |
| 05/11/2011 | CN201826872U Anchor rod with rebar barbs |
| 05/11/2011 | CN201826871U Tube seam type anchor tray |
| 05/11/2011 | CN201826870U Tray of continuously progressively yielding anchor rod |
| 05/11/2011 | CN201826869U Soft rock roadway anchored steel pipe concrete anti-floor heave device |
| 05/11/2011 | CN201826309U Full-length bonded prestress anchor rod |
| 05/11/2011 | CN102051880A Detachable anchor |
| 05/11/2011 | CN101691754B Multi-plate body type anchor rod |
| 05/05/2011 | WO2010051566A9 Fixation bail |
| 05/05/2011 | US20110103896 Cuttable drilling tool, and a cuttable self drilling rock bolt |
| 04/28/2011 | WO2011047416A1 Cable bolt |
| 04/28/2011 | DE102007028267B4 Verbesserte Ankermutter aus faserverstärktem Kunststoff Improved anchor nut fiber reinforced plastic |
| 04/27/2011 | CN201810329U Recoverable anchor cable locking head |
| 04/27/2011 | CN201810328U Grouting anchor rod |
| 04/27/2011 | CN201810327U Steel strand anchor rod of extruding anchor with external threads |
| 04/27/2011 | CN102031984A Reinforcing device for soft protruding coal bed excavated preserved coal body |
| 04/27/2011 | CN102031983A Truss anchor cable connecting and locking device |
| 04/27/2011 | CN102031980A Method for quickly reinforcing coal side by using anchor cable |
| 04/27/2011 | CN101260672B Weak surface rock slope grouting method and anchor tube for grouting |