| Patents for E21D 19 - Provisional protective covers for working space (559) |
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| 11/24/2010 | CN201650318U Integrated armour reinforcing bar mesh |
| 11/17/2010 | CN101886547A Two-pier shielding type large mining height lapping hydraulic bracket |
| 10/27/2010 | CN201614942U 多功能防倒棚和超前护顶装置 Multifunctional Anti-down shed and advanced overhead guard unit |
| 10/27/2010 | CN101871355A Four post support shield type large mining height mesh-placement hydraulic support |
| 10/27/2010 | CN101871218A Trenchless construction method of underground station space and arc-shaped freezing pipe construction equipment thereof |
| 10/20/2010 | CN201610758U 煤矿井下用钢塑复合支护网 Coal mine plastic composite Support Network |
| 10/20/2010 | CN101864973A Method and apparatus for safety protection of temporary roof support |
| 10/20/2010 | CN101864970A Method for supporting and protecting soft, collapsible and super thick coal seam tunnel based on filling behind support and device thereof |
| 10/13/2010 | CN201606086U 基于架后充填的松软易冒特厚煤层巷道支护装置 Based on the rear frame filling soft and easy to take special thick seam roadway devices |
| 09/29/2010 | CN201593430U Lifting infilled wall of hydraulic support |
| 09/16/2010 | DE102009012570A1 Method for securing long-roadway building element in underground mine, involves reinforcing and/or stabilizing roof in transition area in front of roof support with back-filling building material by support system |
| 08/25/2010 | CN201560775U Temporary support device for coal mine tunneling |
| 08/25/2010 | CN201560774U Underground movable temporary protection device |
| 08/11/2010 | CN101260807B Rock laneway primary blasting and delayed concrete-spraying technology |
| 08/04/2010 | CN201539269U Temporary support device of tunneling mechanism |
| 06/30/2010 | CN101761338A Gob-side entry retaining method of a solid filling coal mining half-section one-leg shed |
| 06/23/2010 | CN201513187U Crown block intelligent anti-collision device |
| 06/23/2010 | CN101749034A Shoring method for prolonging service cycle of soft rock laneway |
| 06/09/2010 | CN101725362A Composite support device of dynamic pressure softrock tunnel based on steel pipe concrete bracket |
| 06/02/2010 | CN101349159B Method of single channel railless plastic core-rubber-tire vehicle back withdrawing fully-mechanized mining working face |
| 05/26/2010 | CN201486577U Advancing suspended temporary support |
| 05/12/2010 | CN201460933U Steel bar ladder beam of two bars and two beams |
| 04/01/2010 | WO2010015339A3 Method and apparatus for lining tunnel walls or ceilings with protective nets |
| 03/10/2010 | CN101666236A Forward suspension type falsework |
| 02/17/2010 | CN201407060Y Ultrahigh-strength plastic supporting mesh |
| 02/11/2010 | WO2010015339A2 Method and apparatus for lining tunnel walls or ceilings with protective nets |
| 02/11/2010 | CA2733473A1 Method and apparatus for lining tunnel walls or ceilings with protective nets |
| 01/27/2010 | CN201391328Y Split-type pneumatic top contact forestope of bolting roadway |
| 01/06/2010 | CN100577986C Goaf surrounding rock around gob-side supporting method under three soft geological condition |
| 12/30/2009 | CN101614130A Method for preventing rock-burst of roadway support |
| 11/11/2009 | CN201344038Y Mining survival active supporting net |
| 11/11/2009 | CN201344037Y Integral type artificial roof net for underground |
| 09/02/2009 | CN101523015A Supporting device for an advance working or winning machine |
| 06/17/2009 | CN100501128C Composite material roof net and manufacture method thereof |
| 06/10/2009 | EP2066870A1 Mobile enclosure comprising advancing units |
| 06/10/2009 | CN201254997Y Steel-plastic composite net connecting device |
| 06/10/2009 | CN201254996Y Tunnel composite supporting construction |
| 06/10/2009 | CN201254995Y U-shaped composite supporting construction for tunnel |
| 06/10/2009 | CN201254994Y Advanced supporting construction for arched section tunnel composite support working surface |
| 06/10/2009 | CN201254993Y O-shaped composite supporting construction for tunnel |
| 05/27/2009 | CN201246175Y Mining high strength metal expanding net |
| 04/15/2009 | CN201221365Y Front cantilever temporary support |
| 02/18/2009 | CN201196095Y Pneumatic beam for temporary support in digging |
| 02/04/2009 | CN201190571Y Hydraulic totally-enclosed coal-retaining apparatus for thin seam |
| 01/21/2009 | CN101349159A Method of single channel railless plastic core-rubber-tire vehicle back withdrawing fully-mechanized mining working face |
| 01/15/2009 | WO2009006692A1 A mesh system |
| 01/15/2009 | CA2692950A1 A mesh system |
| 01/14/2009 | CN201180550Y Enhancement type protective net apparatus |
| 12/24/2008 | CN201170104Y Top board support component in fully mechanized caving face ending |
| 11/26/2008 | CN201155331Y Head-on safe protection shield for tunnel development |
| 10/08/2008 | CN101280684A Goaf surrounding rock around gob-side supporting method under three soft geological condition |
| 10/01/2008 | CN201125741Y Anti-projecting fence |
| 09/24/2008 | EP1972753A1 Method for enlarging a tunnel and device for executing the method |
| 09/10/2008 | CN101260807A Rock laneway primary blasting and delayed concrete-spraying technology |
| 08/06/2008 | EP1952980A2 Covering sheet |
| 07/01/2008 | US7393060 Grid of synthetic material |
| 06/18/2008 | CN201074519Y Vitex strip guard plate |
| 06/05/2008 | CA2570022A1 Friction stabilizer with tabs |
| 05/13/2008 | CA2401148C Method for stabilizing irregular structures |
| 04/23/2008 | CN201050373Y Electric scraper discharging tunnel |
| 03/27/2008 | WO2008034415A1 Mobile enclosure comprising advancing units |
| 03/05/2008 | CN201031706Y Girder steel anti-tilting device for coal mine |
| 02/28/2008 | DE19915939B4 Dammbaubock mit verstellbaren Verschalungswänden Dammbaubock with adjustable formwork walls |
| 01/31/2008 | WO2008011647A1 Supporting device for an advance working or winning machine |
| 01/09/2008 | CN201003406Y Down-hole automatic net-connecting device |
| 10/17/2007 | CN200961484Y Built-out type anchorage cable and shed type support coupling device |
| 10/17/2007 | CN101054905A Single side reverse-folding welding and edge-wrapping reinforced steel-plastic net and supersonic net edge folding-welding machine |
| 10/10/2007 | CN200958398Y Polyurethane coal gate |
| 10/03/2007 | CN200955403Y Probe-beam fixing device in front of shed lane temporary support |
| 09/12/2007 | CN200946517Y Steel plastic composite net for underground use of coal mine |
| 09/12/2007 | CN200946514Y Foldable reinforcing steel bar net |
| 09/05/2007 | CN200943504Y Plastic fastener for connecting net for artificial roof of coal mine |
| 08/22/2007 | CN2937480Y Composite net false top for coal mine underground |
| 08/15/2007 | CN2934575Y False roof for underground of coal mine |
| 08/08/2007 | CN2931791Y High strength reinforcement mesh surface protection component |
| 08/08/2007 | CN2931790Y Tilting prevention device of H-shape steel supporter of tunnel |
| 08/08/2007 | CN2931789Y Plastic false roof net with built-in metal wire used in underground coal mine |
| 07/04/2007 | CN2918737Y Ceiling apparatus |
| 06/27/2007 | EP1799953A1 Rock drilling rig, service platform connected to a rock drilling rig and a roof for a service platform |
| 06/27/2007 | CN2916135Y Temporary support front canopy sling for H-shape steel supporting roadway |
| 06/20/2007 | CN2913614Y Strengthening steel-plastic mesh for single-side back-fold welding enveloped edge and ultrasonic selvage fold welding machine |
| 06/20/2007 | CN2913608Y Articulated roof bar type cantilever timbering |
| 06/13/2007 | CN2911184Y Shed type supporting stable conjunction mechanism |
| 05/16/2007 | CN2900792Y Filling bag for treating roof fall |
| 04/18/2007 | CN2889704Y Plastic belt with reinforced bar |
| 03/22/2007 | US20070065236 Mining roof support frame with base skids lifting device |
| 03/14/2007 | CN2878675Y Steel reinforced composite net |
| 02/14/2007 | CN2869325Y Mining plastic stretching net |
| 11/29/2006 | CN2841964Y Mine multifunctional roof-protective cloth |
| 11/22/2006 | CN2839561Y Underpit supporting metal net |
| 10/25/2006 | CN2830643Y Mine top net made of composite material |
| 10/25/2006 | CN1851234A Steel-plastic composite net for coal mine well |
| 10/04/2006 | CN2823559Y Triangular mesh metal supporting net for mine |
| 08/16/2006 | CN2806766Y Steel-plastic composite net artificial roof for mine |
| 05/10/2006 | CN2779068Y Tunnel anchor spout three-dimensional metal mesh structure |
| 04/20/2006 | WO2006041343A1 Rock drilling rig, service platform connected to a rock drilling rig and a roof for a service platform |
| 04/20/2006 | CA2569323A1 Rock drilling rig, service platform connected to a rock drilling rig and a roof for a service platform |
| 03/29/2006 | CN1752414A Composite material roof net and mfg. method thereof |
| 03/08/2006 | CN2763515Y Front beam for dig heading face |
| 01/25/2006 | CN1724846A Fire retardant antistatic plastic false top net for coal mine well |