| Patents for E21F 16 - Drainage (1,138) |
|---|
| 07/24/2013 | CN203081502U Coal rock stratum high positive pressure gas-water separation automatic drainage pressure measuring device |
| 07/24/2013 | CN203078621U Crawler-type water discharging recovery vehicle |
| 07/24/2013 | CN103216641A Integrated bypass 2-position and 5-way negative pressure water drain valve |
| 07/17/2013 | CN203067017U Device for preventing spraying of coal or gas in drilling and cutting |
| 07/17/2013 | CN103206243A Pressure hole drain |
| 07/10/2013 | CN203050780U Pipe-jacking ground-water lowering device of low-permeability saturated silty sand stratum tunnel construction |
| 07/10/2013 | CN203050779U Tunnel drainage structure suitable for bias pressure rich water strata |
| 07/10/2013 | CN203050778U High-negative-pressure automatic water drainage device of gas drainage pipeline |
| 07/10/2013 | CN203043637U Water-gas separating device of harmful gas in mining water of coal mine |
| 07/10/2013 | CN103195477A Gravity drainage system for underground roadway high-pressure water inrush |
| 07/10/2013 | CN102322095B Road accumulated water removing machine |
| 07/10/2013 | CN102287231B Mechanical air and water automatic separation pressure measuring device |
| 07/03/2013 | CN203035257U Downward slant hole slag and water discharge device of downward drilling hole |
| 06/26/2013 | CN203022813U Transverse intercepting trench walling crib with fixation structure |
| 06/26/2013 | CN203022812U Sewer line of mine water purification station |
| 06/26/2013 | CN203022811U Track walking-type water sump coal slime cleaning and excavating machine |
| 06/26/2013 | CN203022762U Tunnel structure capable of simultaneously meeting aerial drainage and passage requirements in tunnel diversion period |
| 06/26/2013 | CN203022043U Slurry collecting mechanism used for underground water sump coal slurry cleaning machine |
| 06/26/2013 | CN203021880U Intelligent railway tunnel melting ice device |
| 06/26/2013 | CN103174455A Method of preventing disaster-avoiding chamber seepage and permeating water disasters |
| 06/19/2013 | CN203008968U Drainage fixing device |
| 06/19/2013 | CN203008967U Intelligent discharge device for pipeline ponding |
| 06/19/2013 | CN203008958U Liquid drainage apparatus for mine downhole emergency refugee facility |
| 06/19/2013 | CN103161469A Method for excavating vertical shaft to underground repair pipe-jacking tool pipe |
| 06/13/2013 | WO2013082662A1 Pump apparatus |
| 06/13/2013 | CA2858180A1 Pump apparatus |
| 06/12/2013 | CN202991129U Drainage arrangement structure used at outlet and inlet of tunnel |
| 06/12/2013 | CN202991128U Automatic negative-pressure drainage device for coal mine gas drainage pipeline |
| 06/12/2013 | CN202991127U Automatic drain device for mining gas drainage pipeline |
| 06/12/2013 | CN202991126U Water drainage device capable of separating gas from water |
| 06/12/2013 | CN202991057U Pipe piece for a water release type tunnel lining |
| 06/12/2013 | CN103147794A Negative-pressure extraction water absorption type reinforcement drainage machine |
| 06/05/2013 | CN202970786U Drainage system of tunnel of severe cold area |
| 06/05/2013 | CN202970785U Detachable movable simple water cabin |
| 05/29/2013 | CN202954851U Decompression and drainage device of wall |
| 05/29/2013 | CN202954850U Electric water distribution device for absorbing wells in main draining pump room of coal mine |
| 05/22/2013 | CN202946194U Water drain pipe for tunnel |
| 05/22/2013 | CN202946193U Tunnel center gutterway formwork |
| 05/22/2013 | CN103114644A Transverse groove walling crib provided with fixed structure and construction method thereof |
| 05/22/2013 | CN101158267B Method and system for accessing subterranean deposits from the surface |
| 05/15/2013 | CN202937304U Maintainable drainage system used for tunnel |
| 05/15/2013 | CN202937303U Drainage system for extra-long tunnel |
| 05/15/2013 | CN202937302U Automatic water drainage device of gas drainage pipeline |
| 05/15/2013 | CN202937298U Automatic drainage slag removal device of mine gas extraction pipe |
| 05/15/2013 | CN202937290U Cable trench ventilation device |
| 05/15/2013 | CN103104289A Mine water disaster treatment method |
| 05/15/2013 | CN103104288A Mine mechanical automatic drainage device |
| 05/15/2013 | CN103104020A Rainwater discharge pipe |
| 05/08/2013 | CN202926388U Drainage facility for road surface bubbling water of highway tunnel |
| 05/08/2013 | CN202926378U Pectination vinyon flange combined type extraction and discharge device |
| 05/08/2013 | CN103089303A Tunnel side wall drainage net |
| 05/08/2013 | CN103089302A Water drainer for mine |
| 05/08/2013 | CN103089301A Grouting reinforcement construction process capable of realizing draining and plugging combined effect for underground water in vertical shaft |
| 05/08/2013 | CN103089275A Control method of surrounding rocks in water-rich very-broken surrounding rock tunnel collapse sections |
| 05/01/2013 | CN202914321U Novel multifunctional air pump |
| 05/01/2013 | CN202914134U Mine drainage device |
| 05/01/2013 | CN103071317A Harmful gas and water separation device for goaf water in coal mine |
| 04/24/2013 | CN202900322U Positive-pressure automatic water discharging device |
| 04/24/2013 | CN202900321U Negative pressure automatic water drainage machine |
| 04/24/2013 | CN202900308U Positive-pressure anti-return-air anti-return-water device |
| 04/24/2013 | CN103061807A Negative pressure automatic water drainage device used for gas pumping pipes |
| 04/24/2013 | CN103061796A Extraction pipe, extraction system and downwards-drilling extraction method |
| 04/24/2013 | CN103061789A Sectionalized waterproof structure for high-water-pressure tunnels |
| 04/24/2013 | CN103061767A Downward horizontal-slice dry-type filling mining method |
| 04/24/2013 | CN102155380B Explosion proof type fast-moving pump station for mine |
| 04/24/2013 | CN102135014B Automatic draining device |
| 04/24/2013 | CN101798939B Maintainable tunnel drainage system |
| 04/17/2013 | CN202883008U Water drainage detection hole controller |
| 04/17/2013 | CN202883007U Hole and fissure water drainage device |
| 04/17/2013 | CN103046959A Full negative pressure automatic water-discharging device |
| 04/17/2013 | CN103046958A Rapidly installed flexible portable pipeline for mine rescue and drainage |
| 04/17/2013 | CN103046957A Rapidly installed automatic detection control and organization command system for mine rescue and drainage |
| 04/17/2013 | CN103046956A Rapidly installed mine rescue and drainage system |
| 04/17/2013 | CN103046955A Large-range goaf group filling method |
| 04/17/2013 | CN103046948A Device and method for preventing coal drilling and cutting or gas emission |
| 04/17/2013 | CN103046533A Drain board with functions of water draining, retaining, storing and collecting |
| 04/17/2013 | CN103046440A Intelligent railway tunnel ice melting device |
| 04/17/2013 | CN102305102B Liquid level control system of coal mine shaft sump |
| 04/17/2013 | CN102061920B Exploring method of water liberation working surface of water-enriched mine area |
| 04/10/2013 | CN202866894U Small-sized movable drainage device |
| 04/10/2013 | CN202866893U Tunnel net waterproof and drainage plate |
| 04/10/2013 | CN202866892U Air pressure hole bottom draining device |
| 04/10/2013 | CN202866891U Water discharging device of gas extraction pipeline |
| 04/10/2013 | CN202866868U Novel dehydration and deslagging device used for mine gas extraction pipeline |
| 04/10/2013 | CN202865039U Short-process draining processing system for coal mine |
| 04/10/2013 | CN103032097A Tunnel drainage structure applicable to water-rich strata under unsymmetrical pressure and construction method thereof |
| 04/10/2013 | CN103032096A Cold-proof construction method of tunnel central ditch of severe cold area |
| 04/10/2013 | CN102094678B Method for identifying water-bursting risks in karst tunnels |
| 04/03/2013 | CN202851080U Cross-shaped water discharging device |
| 04/03/2013 | CN202851010U Mine emergency water controlling system |
| 04/03/2013 | CN202851009U Tunnel buffering multilayer waterproof-drainage structure |
| 04/03/2013 | CN103016056A Drainage arrangement structure for tunnel exit and tunnel entrance and drainage method thereof |
| 04/03/2013 | CN103016055A Coal stratum high positive pressure gas-water separation automatic drainage pressure measuring device |
| 04/03/2013 | CN103016054A Water draining method of automatic water level controller |
| 03/27/2013 | CN202832651U Small-size movable water-draining device |
| 03/27/2013 | CN202832650U Positive-pressure water discharging device and gas pressure detecting device |
| 03/27/2013 | CN202832649U Centralized drainage and gas outburst prevention device for rig with rank of 1000 kilometers of coal mine |
| 03/27/2013 | CN202832648U Water discharging device for coal mine thousand-meter drilling |
| 03/27/2013 | CN202832570U Tunnel secondary lining construction joint waterproof structure |
| 03/27/2013 | CN102996178A Drainage system for tunnel in severe cold region |