| Patents for E21D 21 - Anchoring-bolts for roof, floor, or shaft-lining protection (4,377) |
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| 06/26/2013 | CN203021997U High strength light circle anchor lever |
| 06/26/2013 | CN103174445A Perforation big head slip casting constant resistant anchor rod |
| 06/26/2013 | CN103174438A Tunnel vault cavity pumping backfill construction method |
| 06/20/2013 | US20130156510 Rock bolt |
| 06/20/2013 | DE102011121667A1 Dowel inserted into borehole formed in salt mining field, has cone that is pressed into concentric fins by using helical spring which is held by hooks that are arranged around cone |
| 06/19/2013 | EP2603666A2 Fully grouted cable bolt |
| 06/19/2013 | CN203008937U Anchor rod connecting chain |
| 06/19/2013 | CN203008936U Super strength pre-stressed anchor rod |
| 06/19/2013 | CN203008935U Lockset tray |
| 06/19/2013 | CN203008934U Working-face crossheading belt plate supporting device |
| 06/19/2013 | CN203007943U Bag type slurry stop ring |
| 06/19/2013 | CN103161485A Pre-stressed anchoring conduit |
| 06/19/2013 | CN101871353B Method for soft rock roadway grouting and full-length prestress baseboard anchor cable comprehensive support |
| 06/19/2013 | CN101535598B A rock bolt and an anchoring device |
| 06/14/2013 | CA2798203A1 Rock bolt |
| 06/13/2013 | US20130149046 Apparatus and Method for Re-tensioning a Loose Roof Plate in an Underground Mine |
| 06/13/2013 | US20130149042 Rock bolt |
| 06/13/2013 | US20130149041 Rock bolt and rock bolt component |
| 06/12/2013 | CN202991080U Anchor rod pressure precaution device |
| 06/12/2013 | CN202991079U Base plate type connection device of anchor rod or anchor pipe and structural steel frame |
| 06/12/2013 | CN202991078U Anchor rod capable of being used under dynamic pressure |
| 06/12/2013 | CN202991077U Automatic drilling type hollow grouting anchor rod |
| 06/12/2013 | CN202991076U Mining universal anchor rope and anchor anchoring device |
| 06/12/2013 | CN202991075U Combined anchor stock support |
| 06/12/2013 | CN202991074U Grouting anchor cable capable of adjusting to bottom automatically |
| 06/12/2013 | CN202991055U Mine tunnel ring-fixing type supporting structure |
| 06/12/2013 | CN202989917U Balloon-type anti-corrosion anchor rod |
| 06/09/2013 | CA2798265A1 Rock bolt and rock bolt component |
| 06/08/2013 | CA2798313A1 Apparatus and method for re-tensioning a loose roof plate in an underground mine |
| 06/07/2013 | CA2798304A1 Rock bolt |
| 06/06/2013 | WO2013081989A1 Drive pin for soil reinforcing connector device |
| 06/05/2013 | CN202970747U Hollow bolt-grouting anchor cable for mine |
| 06/05/2013 | CN202970746U Yieldable lock device for supporting and protecting anchor cable or anchor cable beam |
| 06/05/2013 | CN202970745U Reinforcing device for soft coal layer |
| 06/05/2013 | CN202970744U Anchor rod truss |
| 06/05/2013 | CN202969376U High-stress hard rock support anchor rod tray |
| 06/05/2013 | CN103133026A Novel expansion shell inverted wedge type grouting anchor rod |
| 06/05/2013 | CN103133025A Gob-side retaining entry beforehand wall-caving roof-reinforcing method |
| 06/05/2013 | CN103133024A Anticorrosion type anchor rod and production technology of anticorrosion layers thereof |
| 06/05/2013 | CN103133023A Support sleeve for anchor rod production |
| 06/05/2013 | CN103132520A Pipe type anchor rod with horn-shaped bottom end |
| 06/05/2013 | CN103132516A Bead type tubular anchor rod |
| 06/05/2013 | CN103132515A Calabash type anchor rod |
| 06/05/2013 | CN103132514A Detent type anchor rod |
| 06/05/2013 | CN102094660B Integral high-strength flexible support method of roadway at large-inclined angle coal-seam longwall mining section |
| 05/29/2013 | EP2596200A2 Anchoring device |
| 05/29/2013 | DE102011087178A1 Anker, insbesondere Gesteinsanker Anchors, especially rock bolt |
| 05/29/2013 | CN202954828U Active-protection support device with anchor rods |
| 05/29/2013 | CN103122768A Supporting method of carboniferous system geologic structure in-zone breaking country rock roadway |
| 05/29/2013 | CN103122767A Anchor stock tray |
| 05/29/2013 | CN101806217B Tunneling method for three-line parallel small-distance shallow-buried and unsymmetrical-pressure tunnel groups |
| 05/23/2013 | US20130129425 Rock Bolt and an Anchoring Device |
| 05/23/2013 | DE102011086614A1 Gesteinsanker Rock bolts |
| 05/22/2013 | EP2594736A1 Building and civil engineering structure |
| 05/22/2013 | CN202946173U Anchor cable retractable connector for steel beam |
| 05/22/2013 | CN202946172U Shotcrete and rock bolt mesh support structure |
| 05/22/2013 | CN202946171U Overlong hollow spiral grouting anchor rod connecting piece |
| 05/22/2013 | CN202946170U Strong refined tray |
| 05/22/2013 | CN103114865A Vane-type stirring anchor cable |
| 05/16/2013 | US20130121773 Anchoring device |
| 05/15/2013 | CN202937285U Full-thread resin anchor bolt |
| 05/15/2013 | CN202936792U Expansion shell type internal anchor head pre-stressed anchor |
| 05/15/2013 | CN202936791U Pre-stressed anchor rod prevented from being pulled out of anchor eye |
| 05/15/2013 | CN202936789U Sequential bolt tube type anchor bar |
| 05/15/2013 | CN202936783U Tubular type anchor rod with grouted circular energizing blasting holes for anchoring |
| 05/15/2013 | CN202936782U Grouting anchoring bolt with broaching columnar anti-sliding key |
| 05/15/2013 | CN202936781U Tubular type anchor rod with round-cake-shaped anti-skid key |
| 05/15/2013 | CN202936779U Tubular anchor rod provided with reverse bolts |
| 05/15/2013 | CN202936778U Aboral pre-stressed anchor capable of preventing from being pulled out of anchor holes |
| 05/15/2013 | CN202936777U Full-thread glass reinforced plastic anchor rod |
| 05/15/2013 | CN103104283A 'One ventilation and three prevention' equipment for comprehensively preventing accidents in driving face |
| 05/15/2013 | CN103104282A 'One ventilation and three prevention' equipment for comprehensively preventing accidents in driving face |
| 05/15/2013 | CN103104272A Lossless dynamic detection device of anchor stock preload and detection method thereof |
| 05/15/2013 | CN103104271A Anchor cable breakage impact buffering and protecting device |
| 05/15/2013 | CN103104270A Shear type expansion anchor rod and extension application thereof |
| 05/15/2013 | CN103104269A Super high strength pre-stressed anchor rod |
| 05/15/2013 | CN103103989A End-expansive recoverable anchor rod |
| 05/15/2013 | CN101786577B Dual-machine loading-and-walking type hydraulic numerical control deck erection gantry and control system and control method |
| 05/09/2013 | US20130115013 Constant-resistance large-deformation anchor rod |
| 05/08/2013 | CN202926358U Anchor cable and anchor rod combined support device |
| 05/08/2013 | CN202926357U Anchor bolt support plate |
| 05/08/2013 | CN202926356U Mining anchor rod flexible support steel belt| |
| 05/08/2013 | CN202926355U Hollow grouting anchor cable for mine |
| 05/08/2013 | CN202926347U Anchor net supporting roadway advance support device |
| 05/08/2013 | CN102235151B Advanced hole-forming method of sand gravel boulder layer |
| 05/01/2013 | CN202914111U Comprehensive cementation type anchor rod with tension rod |
| 05/01/2013 | CN103075170A Method for controlling surrounding rock deformation of gateway subjected to repeated overhead mining by using hollow grouting anchor cable |
| 05/01/2013 | CN103075165A Composite supporting method of vertical beam of coal road |
| 05/01/2013 | CN103074895A Safety evaluating method for foundation pit anchor rod un-sticking |
| 04/24/2013 | EP2584140A2 Rock bolt sealing system |
| 04/24/2013 | CN202900298U 锚杆 Bolt |
| 04/24/2013 | CN202900297U Hollow grouting yielding anchor rod |
| 04/24/2013 | CN202900296U Yielding tension-free prestressed anchor cable |
| 04/24/2013 | CN202900295U Automatic aligning yield bolt |
| 04/24/2013 | CN202900294U Yielding anchor cable spherical rotation aligning device |
| 04/24/2013 | CN202900293U L-shaped steel strip for treating rectangular roadway shoulder corner damage |
| 04/24/2013 | CN202900292U Novel retaining and protecting device used in underground coal mine |
| 04/24/2013 | CN202899130U Yield anchoring cable |
| 04/24/2013 | CN103069109A Fully grouted cable bolt |
| 04/24/2013 | CN103061806A Composite roof thin seam fully-mechanized coal mining face gob-side entry retaining method |