| Patents for E21D 20 - Setting anchoring-bolts (3,685) |
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| 08/14/2013 | CN203130125U I-shaped steel assistor |
| 08/14/2013 | CN203130109U Large-section karst tunnel supporting equipment |
| 08/14/2013 | CN103244157A Spalling prevention method through full-length anchoring of rib with soft bolt |
| 08/14/2013 | CN103244156A Anti-tipping protection method for pneumatic anchor cable drill rig |
| 08/14/2013 | CN103244122A Trinity coupling support stability control method for gob-side entry-driving coal pillar |
| 08/13/2013 | CA2767209C A yielding spiral bolt appendage for a rock bolt |
| 08/08/2013 | DE102012201662A1 Setzwerkzeug und Verfahren zur Montage einer Ankerstange Setting tool and method for mounting an anchor rod |
| 08/07/2013 | CN203114310U Three-soft seam roadway base plate grouting supporting structure |
| 08/07/2013 | CN203114309U Mining single-rail hanging anchor rod locator |
| 08/07/2013 | CN203114308U Gantry self-propelled anchoring and supporting machine |
| 08/07/2013 | CN203112409U Tensioning jack for prestress anchor bar for mine |
| 08/07/2013 | CN103233754A Tensioning device for anchor cable for mine |
| 08/07/2013 | CN103233748A Anchor mesh cable column combined supporting design method for expanding extra-large span open-off cut brush into lane |
| 08/07/2013 | CN103233746A Multifunctional underground roadway tunneling locomotive |
| 07/31/2013 | CN101903614B Method and devices for handling rod-like pieces in drilling and bolting |
| 07/25/2013 | DE102012000983A1 Vorrichtung für ein Drainage-Bohr-System Device for a drainage drilling system |
| 07/24/2013 | EP2616634A1 Drill hole plugs |
| 07/24/2013 | CN203081472U Device for installing anchoring agent in anchor drill hole |
| 07/24/2013 | CN103221631A Drill hole plug |
| 07/24/2013 | CN103216247A Prestress shield tunnel and construction method thereof |
| 07/24/2013 | CN103216244A Roadway soft and weak top plate anchoring beam-arch combined structure support system and support method |
| 07/24/2013 | CN103216194A Omnibearing multi-angle rotating-type anchor rod drill wagon |
| 07/24/2013 | CN103215952A High polymer anchoring grouting method |
| 07/24/2013 | CN102108868B Balanced excavation method for room and pillar mining method |
| 07/18/2013 | WO2013105725A1 High-energy pressure fit type of rock bolt |
| 07/18/2013 | WO2013104021A1 Improved torque tensioning system for cable bolts |
| 07/18/2013 | WO2013104019A1 A combination tool for installing and tensioning a cable bolt |
| 07/18/2013 | US20130183105 Truss Shoe For Use With A Threaded Rod |
| 07/17/2013 | CN203066999U Packaging structure for resin anchoring agent |
| 07/17/2013 | CN103206233A Anchor rope total length anchoring method for coal mine soft rock roadway |
| 07/17/2013 | CN103206232A Synchronous pre-support and anchorage device for follow-up heading machines |
| 07/17/2013 | CN103206224A Strong resistance and strong evasion floor heave governing construction method of high-stress large-deformation soft rock drift |
| 07/16/2013 | CA2550247C Grout pack restraining system |
| 07/12/2013 | CA2801666A1 Truss shoe for use with a threaded rod |
| 07/10/2013 | CN203050746U Anchor rod centering machine |
| 07/10/2013 | CN203050745U Cartridge anchoring agent placing guiding rod |
| 07/10/2013 | CN203050744U Light-weight type corrosion-resistant multifunctional metal band beam |
| 07/10/2013 | CN103195457A Supporting method for roadway fully-mechanized drivage operation without withdrawal of roadheader |
| 07/10/2013 | CN103195454A Pack roadway or chamber supporting method |
| 07/10/2013 | CN103195453A Parameter determination method for bolt supporting based on roadway bearing structure |
| 07/10/2013 | CN103195442A Even-grouting structure of coal mine tunnel and construction technology thereof |
| 07/10/2013 | CN103195441A Supporting and reinforcing structure of coal mine tunnel and construction technology thereof |
| 07/10/2013 | CN103195426A Steep-coal-seam long wall face non-pillar coal mining method |
| 07/10/2013 | CN101910558B Advancing machine |
| 07/04/2013 | WO2013098460A1 Method and mining vehicle for post-drilling insertion |
| 07/04/2013 | WO2013098459A1 Method and arrangement for post-drilling insertion |
| 07/03/2013 | CN203035211U Protective device of anchor cable drilling machine |
| 07/03/2013 | CN203035210U Resin cartridge filling device for roadway roof bolt drill hole |
| 07/03/2013 | CN203035078U Impacting and rotating bolting machine |
| 07/02/2013 | CA2705842C Heading machine |
| 07/02/2013 | CA2480729C Yieldable rock fastener system and method |
| 06/27/2013 | CA2770251A1 Seismic drilling bit with pivot ring for use in anchor insertion |
| 06/26/2013 | CN203022782U Hole-sealing and grout-stopping anchor part |
| 06/26/2013 | CN103174448A In-time supporting method for roadway fully-mechanized excavating operation |
| 06/26/2013 | CN103174444A Support method and support structure for soft coal/ rock stratum alley |
| 06/26/2013 | CN103174443A Positioning device and positioning method applied to prefabricate anchor rod in underground construction model test |
| 06/26/2013 | CN103174382A Multifunctional hydraulic anchor rod drill carriage |
| 06/19/2013 | EP2603666A2 Fully grouted cable bolt |
| 06/19/2013 | CN203007953U Inflatable grouting type slurry-stopping plug for hollow grouting anchor rod |
| 06/19/2013 | CN103161484A Pasty fluid fixed-length anchoring supporting method |
| 06/19/2013 | CN103161483A Jacking device of anchor cable |
| 06/19/2013 | CN103161477A Sand layer space forepoling strengthening technology |
| 06/19/2013 | CN101871353B Method for soft rock roadway grouting and full-length prestress baseboard anchor cable comprehensive support |
| 06/18/2013 | CA2523278C Device for rock bolting and for automatized rock bolting and rock bolting method |
| 06/14/2013 | CA2798203A1 Rock bolt |
| 06/12/2013 | CN202991074U Grouting anchor cable capable of adjusting to bottom automatically |
| 06/12/2013 | CN202990849U Plane revolution down-hole drill for drilling cutting holes along side wall of bored pile rock shaft |
| 06/12/2013 | CN202989920U Long anchor cable tensioning device |
| 06/12/2013 | CN103147793A Non-chain-pillar roadway protection method adopting filling beside thin coal seam roadway |
| 06/12/2013 | CN103147778A Method for lane development and support in extremely crushed rock stratum |
| 06/12/2013 | CN103147777A Pumping paste prestress full bolting anchor rod/cable supporting method |
| 06/12/2013 | CN103147776A Method for reinforcing shallow part of mine shaft with long anchor cable |
| 06/12/2013 | CN103147772A Method for supporting steel strip connecting bridge of arch-shaped soft rock roadway with large section |
| 06/12/2013 | CN101832103B Movable two-arm hanging wall anchor rod and anchor cable construction drill carriage |
| 06/08/2013 | CA2798313A1 Apparatus and method for re-tensioning a loose roof plate in an underground mine |
| 06/06/2013 | WO2013078514A1 Grout delivery |
| 06/06/2013 | CA2856437A1 Grout delivery |
| 06/05/2013 | EP2598717A2 Resin system and rock anchor |
| 06/05/2013 | CN202970743U Anchor rod assembling machine used for mine |
| 06/05/2013 | CN103133026A Novel expansion shell inverted wedge type grouting anchor rod |
| 06/05/2013 | CN103133022A Pneumatic handheld type anchor rod drilling machine |
| 06/05/2013 | CN103132916A Hollow anchor rod drill |
| 06/05/2013 | CN102296603B Grouting-stopping plug and system for anchor rod (anchor cable) |
| 06/05/2013 | CN101967989B Crawler travel anchor transporting machine |
| 05/29/2013 | DE102011087178A1 Anker, insbesondere Gesteinsanker Anchors, especially rock bolt |
| 05/29/2013 | CN103122768A Supporting method of carboniferous system geologic structure in-zone breaking country rock roadway |
| 05/23/2013 | US20130129423 Method and arrangement for preventing movement of structure |
| 05/23/2013 | DE102011086614A1 Gesteinsanker Rock bolts |
| 05/22/2013 | CN202946010U Dual-purpose type impacting and rotating anchor rod drilling machine |
| 05/22/2013 | CN103115188A Hydraulic control system and bolting machine |
| 05/22/2013 | CN101975077B High-outburst coal mine coal roadway drilling-loading-bolting integrated machine |
| 05/16/2013 | US20130121773 Anchoring device |
| 05/15/2013 | CN202937284U Shattered medium downward casing pipe pore-forming and bolt-grouting substep reinforcing device |
| 05/15/2013 | CN103104268A Installation device for mine anchoring agent |
| 05/10/2013 | WO2012024149A4 Rotational drill bits and drilling apparatuses including the same |
| 05/08/2013 | CN202926354U Grouting reinforcement device for anchor rod |
| 05/08/2013 | CN202926353U Simple anchor withdrawing device |
| 05/08/2013 | CN202926209U Anchor rod locator |
| 05/08/2013 | CN103089284A Pneumatic jumbolter |
| 05/08/2013 | CN102182459B Method for recovering remaining triangle coal on two-winged stope by flexible shield support mining method |