| Patents for E21D 21 - Anchoring-bolts for roof, floor, or shaft-lining protection (4,377) |
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| 03/05/2014 | CN203463129U Equally-strong roadway supporting steel belt |
| 03/05/2014 | CN203463128U Improved anchor rod ladder beam structure |
| 03/05/2014 | CN203463127U Split-type adjustable anchor rod for anchoring through filling in explosion expanding-cavity |
| 03/05/2014 | CN203463126U Energy absorption anchor bolt |
| 03/05/2014 | CN203463125U Expansion-shell pre-stress hollow anchor rod applied to rockburst tunnel construction |
| 03/05/2014 | CN103615273A Square steel confined concrete arch center wall back filling bolting-grouting support system and construction method |
| 03/05/2014 | CN103615272A Hollow anchor rod with rebar framework and construction method of hollow anchor rod |
| 03/05/2014 | CN103615004A Anchor pipe with semi-active variable damping control device |
| 03/05/2014 | CN102536283B Retractable constant force yielding anchor bolt for dynamical pressure soft rock lane |
| 02/27/2014 | WO2014028966A1 A cable bolt assembly |
| 02/27/2014 | WO2013152366A3 Method for drilling holes in soil or rock material and for fixing an anchor in a borehole and apparatus therefor |
| 02/26/2014 | CN203452816U Novel anti-fracture anchor rod structure |
| 02/26/2014 | CN203452815U Anchor for deformed ore |
| 02/26/2014 | CN203452814U Self-made anchor rod used for supporting crumbly strata pipe shed |
| 02/26/2014 | CN203452813U Detector for pretightening force of anchor rod |
| 02/26/2014 | CN103603685A Stretchable variable-resistance energy absorption anchor rod |
| 02/26/2014 | CN103603684A Large-deformation pre-stressed anchor bolt |
| 02/26/2014 | CN103603675A Supporting method of permeable soft broken rock stratum roadway |
| 02/26/2014 | CN103603351A Semi-active variable-stiffness energy dissipation and seismic mitigation control anchor bolt |
| 02/19/2014 | CN203441514U 锚杆头 Bolt head |
| 02/19/2014 | CN203441513U Mining anchor rope for bolting-grouting |
| 02/19/2014 | CN103590845A Impact-resistant interval grouting anchor cable and use method thereof |
| 02/19/2014 | CN103590844A High pre-stressing force pressure yielding and equalizing coupling anchorage device for soft rock supporting |
| 02/18/2014 | US8651769 Friction bolt |
| 02/12/2014 | CN203430548U Recyclable anchor rod |
| 02/12/2014 | CN203430547U Bolting and grouting double-reinforcing mining anchor cable |
| 02/12/2014 | CN203430546U Roadway roof protective net of coal face |
| 02/12/2014 | CN203430545U Protection sleeve for anchor rod of forepoling bar |
| 02/12/2014 | CN203430544U Large-diameter high-pressure-resistant hollow fiber reinforced plastic anchor rod |
| 02/12/2014 | CN203430543U Expansion anchor rod |
| 02/12/2014 | CN203430542U Expansion recoverable anchor rod |
| 02/12/2014 | CN203430541U Tail sleeve for anchor cable |
| 02/12/2014 | CN103573280A Method for supporting porous ooze invasion compound roof roadway |
| 02/12/2014 | CN103573279A Mining telescopic energy adsorption anti-impact viscous damping anchor rod and supporting method thereof |
| 02/12/2014 | CN103572757A Multi-level back-grasp-type hollow anchor rod and construction method thereof |
| 02/06/2014 | US20140037388 Rock bolt |
| 02/05/2014 | CN203420723U High ground stress surrounding rock anchor bolt pressure transferring device |
| 02/05/2014 | CN203420722U Anchor rod device |
| 02/05/2014 | CN203420721U Grouting anchor rod grout-stopping tray for tunnel |
| 02/05/2014 | CN103562499A Anchoring systems for mines |
| 02/05/2014 | CN103557020A Energy-absorption and impact-prevention supporting and protecting device for combined type circular tunnel |
| 02/05/2014 | CN102691514B Multistage sectional grouting-free self-expansion type anchoring rod |
| 01/29/2014 | CN203412604U Novel anchor rod pulling resistance alarm instrument |
| 01/29/2014 | CN103541750A Alternately-distributed energy-absorbing overlength combined anchor rod for mining and application method |
| 01/29/2014 | CN103541749A Driving head-on coal slide protective device and head-on closing method of driving working face |
| 01/29/2014 | CN102425439B Method for reinforcing bidirectional staged stretched anchor cable of preset steel strand |
| 01/28/2014 | US8636448 Drilling apparatus, method, and system |
| 01/22/2014 | EP2687673A2 Protective device for (rock) bolts and friction bolts |
| 01/22/2014 | CN203403901U OV steel disc for anchoring |
| 01/22/2014 | CN203403900U Hoisting self-moving type anchor-rod cable bolting equipment |
| 01/22/2014 | CN103527232A Overall support device for large dip angle coal roadway and usage method of overall support device for large dip angle coal roadway |
| 01/22/2014 | CN103527213A Method and device for reinforcing karez tunnel by anchoring self-rotating anchor rod on geogrid |
| 01/21/2014 | US8632281 Mechanically stabilized earth system and method |
| 01/21/2014 | US8632280 Mechanically stabilized earth welded wire facing connection system and method |
| 01/21/2014 | US8632278 Mechanically stabilized earth welded wire facing connection system and method |
| 01/16/2014 | DE102012016083A1 Method for producing rock bolt used as self-drilling bolt used for e.g. mining application, involves forming strip into tubular body after profiling and/or structuring, and shortening tubular body to length desired for tubular bolt element |
| 01/15/2014 | CN203394557U Full filling type hollow grouting anchor rod |
| 01/15/2014 | CN203394556U Thwart hollow grouting anchor cable |
| 01/15/2014 | CN203394555U Feet-lock small guide tube connected with steel plate |
| 01/15/2014 | CN203393706U Self-locking anti-pulling anchor rod |
| 01/15/2014 | CN103510983A Wall-mounting-type vertical coal bunker without coal feeder chamber |
| 01/09/2014 | WO2014005166A2 Method and device for making drill holes and fixing an anchor in the drill hole |
| 01/09/2014 | US20140010598 Rock Bolt |
| 01/08/2014 | CN203383841U Drawing force indicator under even stress |
| 01/08/2014 | CN203383840U Anchor plug pushing device used for anchor rope supporting structure and anchor rope supporting structure |
| 01/08/2014 | CN203383839U Resin full-length anchoring anchor rod for roadway |
| 01/08/2014 | CN103498691A Mine multiple-steel-strand combination supporting device and method |
| 01/08/2014 | CN103498690A Double-anchor-cable combination locking device and method thereof |
| 01/08/2014 | CN102587920B Tunnel entrance bias section construction method |
| 01/01/2014 | EP2678528A1 Rock bolt |
| 01/01/2014 | CN203374292U Surface structure for preliminary bracing processing of tunnel |
| 01/01/2014 | CN203374285U High-resistance-increasing type combined steel supporting frame |
| 01/01/2014 | CN203374283U Pipe-jacking structure applied in tunnel engineering |
| 01/01/2014 | CN103485811A Detection method for axial force and bending moment of anchor rod and detecting anchor rod |
| 01/01/2014 | CN103485810A Anchor rope anchoring end device with reverse grab and anchoring method |
| 01/01/2014 | CN103485809A Shoulder protection type steel belt |
| 01/01/2014 | CN102816971B Ultra high strength anchor pile with impact energy more than 100 J and manufacturing process thereof |
| 01/01/2014 | CN102562109B Resistance-increasing yielding high-deformation anchor rod and processing method thereof |
| 12/27/2013 | WO2013190313A2 Connection for rock bolts |
| 12/27/2013 | WO2013189785A2 An anchor mechanism and a cable rock bolt |
| 12/25/2013 | CN203362196U Device capable of improving the strength and integrity of anchor rope wood tray |
| 12/25/2013 | CN203362195U Glass fiber-reinforced plastic anchor rod filled with liquid nitrogen |
| 12/25/2013 | CN203362194U Dual-yielding glass reinforced plastic anchor rod directly loading prestress |
| 12/25/2013 | CN103470291A Method for support connection of machine tail on large-dip-angle working face |
| 12/25/2013 | CN103470290A Circular truncated cone-shaped anchor rod anchoring technology |
| 12/25/2013 | CN103470289A Contiguous coal seam mining support method |
| 12/25/2013 | CN103470288A Anchoring split adjustable anchor rod filled in explosion expanded cavity |
| 12/25/2013 | CN102337925B Method for enlarging, filling and supporting coal-pillar-free mining roadway for fully-mechanized top coal caving |
| 12/24/2013 | DE102012012136A1 Verbindung für Gebirgsanker Connection for rock bolts |
| 12/24/2013 | CA2703627C Powder-actuated mechanical lock concrete anchor |
| 12/19/2013 | WO2013186284A1 Bolt elements and method for producing bolt elements |
| 12/19/2013 | US20130336725 Rock Bolt |
| 12/18/2013 | CN203347814U Combined retractable anchor rod |
| 12/18/2013 | CN203347813U Expansion shell type constant-resistance pre-stressed bolt |
| 12/18/2013 | CN203347812U Telescopic supporting rod for underground roadway support |
| 12/18/2013 | CN203346884U Anchor cable pressure boost device |
| 12/18/2013 | CN103452572A Drill rod special for anchor rod recovery |
| 12/18/2013 | CN103452569A Large-section chamber supporting method |
| 12/18/2013 | CN102337904B Method for retaining gob-side tunnel |
| 12/11/2013 | EP2670952A2 Protective device for (rock) bolts and friction bolts |