| Patents for E21D 21 - Anchoring-bolts for roof, floor, or shaft-lining protection (4,377) |
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| 09/11/2013 | CN203188207U Anchor rod with end portions capable of being expanded |
| 09/11/2013 | CN103299034A 锚固装置 Anchoring device |
| 09/11/2013 | CN103291337A Anchor rod with external expanding devices |
| 09/04/2013 | EP2633158A1 Filling of partitioned film packages for anchoring systems for mines |
| 09/04/2013 | CN203175587U Crab-shaped rock bolt tray for crumbly rock stratum support |
| 09/04/2013 | CN103277134A One ventilation and three prevention equipment comprehensively preventing driving face accidents |
| 09/04/2013 | CN103277133A One ventilation and three prevention equipment comprehensively preventing stoping face accidents |
| 09/04/2013 | CN103277132A One ventilation and three prevention equipment comprehensively preventing stoping face accidents |
| 09/04/2013 | CN103277125A Small feet-lock guide pipe with steel plate connection |
| 09/04/2013 | CN103277124A Anchor-rod-combined supporting method for high-sulfur crush rock mine |
| 09/04/2013 | CN103277114A Non-sprayed-concrete anchor net supporting method of underground construction broken surrounding rocks |
| 09/04/2013 | CN103276734A Removing type anchorage device |
| 09/04/2013 | CN102128039B Drilling rod belt-feeding type prestress anchor rod and use method thereof |
| 09/03/2013 | US8523494 Expansion shell assembly |
| 08/28/2013 | CN203161268U Anchor rope safety cap |
| 08/28/2013 | CN103266607A Anchor head waist beam structure |
| 08/28/2013 | CN102304930B Method for detecting prestress construction quality of anchoring engineering |
| 08/26/2013 | DE202012101908U1 Konvergenzbolzen Convergence bolts |
| 08/21/2013 | CN203145978U Anchor rod with safety detection device |
| 08/21/2013 | CN203145977U Resin anchored bolt stirring device |
| 08/21/2013 | CN203145976U Recoverable flexible anchor rod device |
| 08/21/2013 | CN203145975U Easily recyclable bolting |
| 08/21/2013 | CN203145974U Crosswise-arranged U-shaped through anchor coal and rock pillar supporting device |
| 08/21/2013 | CN203145973U Anchor rope tray |
| 08/15/2013 | US20130209192 Tensionable threaded rebar bolt |
| 08/14/2013 | CN203130129U Novel steel strand anchor rod |
| 08/14/2013 | CN203130128U Combined type hollow grouting anchor rod |
| 08/14/2013 | CN203130127U Anchor rod used for underground coal mine roadway supporting |
| 08/14/2013 | CN203130126U Recoverable anchor rod |
| 08/14/2013 | CN203129961U Right-angle groove type two-wing-type anchor bolt drill bit |
| 08/14/2013 | CN103245443A Anchor rod for measuring pressure through wireless communication displacement |
| 08/14/2013 | CN103244162A Compressible base plate device and anchor cable anchorage method by device |
| 08/14/2013 | CN103244161A Yielding type backing plate device |
| 08/14/2013 | CN103244160A Detachable reused single-pore clamping piece type anchor rope anchorage device |
| 08/14/2013 | CN103244159A Method and device for exerting anchor rod pretightening force |
| 08/14/2013 | CN103244158A Strengthening structure for integrated bolting with bar and wire mesh |
| 08/14/2013 | CN103244146A Construction method for steel frame connection in tunnel anchor-plate retaining |
| 08/14/2013 | CN103243714A High-strength pre-stressed anchor rod |
| 08/13/2013 | CA2767209C A yielding spiral bolt appendage for a rock bolt |
| 08/13/2013 | CA2715794C Improved sliding anchor |
| 08/13/2013 | CA2456303C Continuous method of realization of underground tunnels including peripheral perforations |
| 08/08/2013 | US20130202364 Anchor and method of installing anchor |
| 08/07/2013 | CN203114315U Yielding anchor rod capable of monitoring prestress by itself |
| 08/07/2013 | CN203114314U Mining anchor rod |
| 08/07/2013 | CN203114313U Blade type stirring anchor cable |
| 08/07/2013 | CN203114312U Supporting system of prestress anchor bar for mine |
| 08/07/2013 | CN203114311U Pressure-yielding device of surrounding rock anchor rod |
| 08/07/2013 | CN203114296U Five-pointed star type floral tube retaining and protecting structure of granite residual soil tunnel |
| 08/07/2013 | CN203113331U Antiseptic anchor stock |
| 08/07/2013 | CN101975073B Retractable concrete arch and anchor rod combined support system and construction method |
| 07/31/2013 | CN203097917U Force-measuring rock bolt |
| 07/31/2013 | CN203097916U Large-end perforating and grouting constant-resistance anchor rod |
| 07/31/2013 | CN203097915U Double-e-shaped steel belt for anchoring |
| 07/31/2013 | CN203097914U Novel expanding device of hollow anchor rod |
| 07/25/2013 | DE102012000983A1 Vorrichtung für ein Drainage-Bohr-System Device for a drainage drilling system |
| 07/24/2013 | CN203081475U Multiple anti-corrosion type self-boring hollow grouting anchor rod |
| 07/24/2013 | CN203081474U Combination anchor rod |
| 07/24/2013 | CN203081473U Anchor net |
| 07/24/2013 | CN103216250A Grouting anchor rod with control valve |
| 07/24/2013 | CN103216247A Prestress shield tunnel and construction method thereof |
| 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 | CN203067004U Nondestructive dynamic detection device for pretightening force of anchor bolt |
| 07/17/2013 | CN203067003U Bamboo-plastic composite tray |
| 07/17/2013 | CN203067002U Steel-plastic composite anchor rod |
| 07/17/2013 | CN203067001U Tray for supporting and protecting |
| 07/17/2013 | CN203067000U Glass steel anchor rod |
| 07/17/2013 | CN203066998U Leading temporary support device for anchor bolt spray roadway |
| 07/17/2013 | CN103206239A Equipment for comprehensively preventing one-ventilation three-prevention accidents on driving face |
| 07/17/2013 | CN103206234A Check anti-water-bursting grouting rock bolt |
| 07/17/2013 | CN103206223A Reinforcing structure of surrounding rock inside precast-segment tunnel |
| 07/17/2013 | CN103206222A Method for constructing reinforced surrounding rock inside precast-segment tunnels |
| 07/16/2013 | US8485758 Yieldable cone bolt and method of manufacturing same |
| 07/16/2013 | US8485608 Heading or extraction machine |
| 07/10/2013 | CN203050751U Novel anchor rod grouting tray |
| 07/10/2013 | CN203050750U Tray with thread section protection device |
| 07/10/2013 | CN203050749U Energy-absorbing transformable anchor rod tray |
| 07/10/2013 | CN203050748U Combined type reinforced concrete lining structure with hard rock tunneling machine construction method |
| 07/10/2013 | CN203050747U Anchor cable beam |
| 07/10/2013 | CN203050708U Mining multifunctional tunnelling machine |
| 07/10/2013 | CN203049577U Complete recovery type non-grouting anchor grasping anchor cable timbering structure |
| 07/10/2013 | CN203049576U Fiberglass hollow grouting anchor rod |
| 07/10/2013 | CN103195456A Intelligent anchor rod early-warning and monitoring system for surrounding rock disasters of roadway |
| 07/10/2013 | CN103195455A Large section tunnel construction support and protection system and construction method under flabby geological environment |
| 07/10/2013 | CN103195441A Supporting and reinforcing structure of coal mine tunnel and construction technology thereof |
| 07/03/2013 | CN203035215U Whole flexible false roof web fixing device for retracement of coal mine fully-mechanized coal mining working face |
| 07/03/2013 | CN203035214U Grading whole length controllable grouting bolt |
| 07/03/2013 | CN203035213U Expansion type anchor rod |
| 07/03/2013 | CN203035212U Intelligent control resistance-increasing large deformation anchor stock |
| 07/03/2013 | CN102392667B Fast installation method of ten-million-ton scale fully mechanized caving face equipment |
| 07/02/2013 | CA2480729C Yieldable rock fastener system and method |
| 06/26/2013 | CN203022784U Roadway deep surrounding rock grouting anchor cable |
| 06/26/2013 | CN203022783U Anchor cable of novel specification in anchor/cable/mesh support roadway |
| 06/26/2013 | CN203022782U Hole-sealing and grout-stopping anchor part |
| 06/26/2013 | CN203022781U Hole-sealing and grout-stopping anchor cable |
| 06/26/2013 | CN203022780U Hole-sealing and grout-stopping anchor rod |
| 06/26/2013 | CN203022779U Circular anchor bolt tray |
| 06/26/2013 | CN203022778U Left-hand thread pre-tightening device for side truss anchor cable beam |