| Patents for E21F 16 - Drainage (1,138) |
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| 01/08/2014 | CN203383852U Tunnel damaged ditch guide drainage conversion prefabricate device |
| 01/08/2014 | CN102619560B Drainage and drainage method for long-distance reverse-slope tunnels |
| 01/08/2014 | CN102619518B Ore drawing technique for controlling fluidity of ore rocks via pillarless cornice end-wall sublevel caving method |
| 01/08/2014 | CN102587920B Tunnel entrance bias section construction method |
| 01/08/2014 | CN102337888B Large-gradient development machine |
| 01/01/2014 | CN203374314U Non-plugging auxiliary mine drainage system |
| 01/01/2014 | CN203374313U Slope ramp drainage pontoon |
| 01/01/2014 | CN203374309U Inverted truncated cone type large hydraulic pressure mine waterproof gate chamber |
| 01/01/2014 | CN103485821A Automatic water discharging device of coal-mine gas extraction pipeline |
| 12/25/2013 | CN203362224U Main-auxiliary water tank for hanging scaffolds |
| 12/25/2013 | CN203362223U Mine automatic drainage system based on Internet of things |
| 12/25/2013 | CN203362222U Negative-pressure automatic drainage device |
| 12/25/2013 | CN103470299A Dewatering device used for negative-pressure gas extraction pipeline |
| 12/25/2013 | CN103470297A Drilling, pumping and discharging integrated coal seam pressure relief and permeability improvement device and using method thereof |
| 12/25/2013 | CN103470267A Long tunnel fast construction process |
| 12/18/2013 | CN203347839U Energy-saving, emergent and anti-clogging full pipe (group) free drainage system of gob |
| 12/11/2013 | CN103437779A Construction method for renovating tunnel lining water seeping damage |
| 12/11/2013 | CN102518439B Method for constructing tunnel with uncovered hole section in middle |
| 12/04/2013 | CN203321586U Multifunctional prefabricated side type ditch in road tunnel for clean-up and separation of sewage and maintenance |
| 12/04/2013 | CN203321585U Two-phase active water discharging device |
| 12/04/2013 | CN203321584U Gas separating device |
| 12/04/2013 | CN203321543U High water pressure tunnel partition waterproof structure |
| 12/04/2013 | CN103422885A Automatic water draining system |
| 12/04/2013 | CN103089275B Control method of surrounding rocks in water-rich very-broken surrounding rock tunnel collapse sections |
| 11/27/2013 | CN103410741A Lower-pump-split type submersible electric pump matched with flame-proof type water filling electromotor |
| 11/27/2013 | CN103410564A Tunnel water gushing treatment structure and construction method thereof |
| 11/27/2013 | CN103410563A Cold-proof draining tunnel |
| 11/27/2013 | CN103410530A Method for hole-forming drainage and heating antifreezing for tunnel backing in electric heating dewaxing way |
| 11/27/2013 | CN103410210A Water-absorbing fiber percolation pipe and dewatering device |
| 11/20/2013 | CN203296817U Inclined drift system |
| 11/20/2013 | CN203296816U Underground coal mine water collecting device |
| 11/20/2013 | CN103397908A Buffering system for solving scarce drainage capability of central drainage ditch of tunnel and control method of buffering system |
| 11/13/2013 | CN103388489A Strong karst tunnel permanent draining structure and construction method thereof |
| 11/13/2013 | CN102400713B Method for auxiliary construction of water falling in tunnel by communicated channel |
| 11/06/2013 | CN203271809U Automatic mine-used water discharging device |
| 11/06/2013 | CN103382853A Buffer system for draining local burst gushing water of tunnel and control method |
| 11/06/2013 | CN103382852A Underground flood damage emergency water draining rescue system and method |
| 11/06/2013 | CN103382851A Floor crack water pumping device and method |
| 11/06/2013 | CN103382850A Top plate crack water guiding device and method |
| 10/31/2013 | WO2013159749A1 Method for distributed storage and use of underground water in mine |
| 10/23/2013 | CN203248194U Automatic drainage device of underground pressure ventilation pipe |
| 10/23/2013 | CN103362549A Automatic water draining device and gas extraction system |
| 10/23/2013 | CN103362537A Drainage mechanism of gas extraction pipe |
| 10/16/2013 | CN203239392U Double-multiple-arch tunnel middle wall provided with drainage system |
| 10/16/2013 | CN203239391U Mine water drainage system |
| 10/10/2013 | WO2012177143A3 A method for constructing a tunnel course, and structural element for use by the method |
| 10/09/2013 | CN203230546U High-lift water pump |
| 10/09/2013 | CN203230458U Emergency drainage equipment of coal mine |
| 10/09/2013 | CN103343700A Assembly method of drainage vacuum box for mine |
| 10/02/2013 | CN203223252U Mine sump drainage system |
| 10/02/2013 | CN103334789A Mine hanging scaffold water tank |
| 10/02/2013 | CN103334788A Vacuum drainage method for mine shaft |
| 10/02/2013 | CN103334787A Assembly method of vacuum drainage system for mine shaft |
| 10/02/2013 | CN103334786A Underground draining device |
| 10/02/2013 | CN103334770A Construction method of superhigh water pressure water-affluent crushed zones of long-large counter-slope tunnels |
| 09/25/2013 | CN203214099U Drainage structure of subway deformation joint water receiving box |
| 09/25/2013 | CN203214098U Free drainage device of high pressure-bearing gushing water in underground roadway |
| 09/18/2013 | CN103306721A Sealing device and method of pilot vacuum downcast pipe end head |
| 09/18/2013 | CN103306683A Construction method for comprehensive precipitation in hole in deep-buried tunnel excavation process |
| 09/11/2013 | CN203189064U Pressure hole drain device |
| 09/11/2013 | CN103291357A Continuous automatic negative-pressure water discharger |
| 09/11/2013 | CN103291356A Automatic draining device for mines |
| 09/11/2013 | CN101726572B Gas drainage detection device and water removing device capable of automatically draining water |
| 09/06/2013 | WO2013129979A1 A shielded draining pipe mesh |
| 09/04/2013 | CN203175615U Tunnel rain sewage drainage system |
| 09/04/2013 | CN203175614U Suction sewage truck for use under coal mine well |
| 09/04/2013 | CN203175571U Subway station independent-of-wall type partition wall |
| 09/04/2013 | CN103277136A Draining system |
| 09/04/2013 | CN102305097B Automatic water drainage slag remover in gas drainage |
| 08/28/2013 | CN203161293U Gas well draining device |
| 08/28/2013 | CN203161292U Automatic water-draining device of gas drainage pipeline |
| 08/28/2013 | CN203161285U Integrated automatically-controlled water drainage device of gas drainage pipeline |
| 08/28/2013 | CN203161259U Buried-in type rubber water-stop belt of double-layer waterproof structure and construction-joint water drainage structure formed by buried-in type rubber water-stop belt |
| 08/28/2013 | CN203161256U Large-span swelling rock tunnel system in severe cold area |
| 08/28/2013 | CN203161255U Tunnel network waterproof and drainage structure |
| 08/28/2013 | CN103266915A Mine automated water drainage system based on internet of things |
| 08/21/2013 | CN203146018U Water supplying and draining device |
| 08/21/2013 | CN203146017U Underground coal mine water supply and discharge pipeline |
| 08/21/2013 | CN203146016U Intelligent mine energy-saving drainage control system |
| 08/21/2013 | CN203146015U Ascending drilling hole orifice drainage device |
| 08/21/2013 | CN203145996U Downward wet hole drainage |
| 08/21/2013 | CN103256052A Construction method for integral straight middle wall type double-arch tunnel |
| 08/21/2013 | CN102518461B Coal mine low-post secondary heat energy resource comprehension utilization system |
| 08/21/2013 | CN102345473B Mine intrinsic safety type automatic drainage and measurement and control protection device |
| 08/20/2013 | US8511372 Method and system for accessing subterranean deposits from the surface |
| 08/14/2013 | CN203130152U Drainage device for gas drainage pipelines/industrial pipelines |
| 08/14/2013 | CN203130151U Automatic on-line draining device for gas drainage |
| 08/14/2013 | CN203130143U Automatic water discharging device of gas extraction collecting box |
| 08/14/2013 | CN203128955U Deicing device for electrified railway tunnel |
| 08/07/2013 | CN203115188U Integrated bypass two-position five-way negative pressure drain valve |
| 08/07/2013 | CN203114342U Automatic water drainage device for drawing out methane under high negative pressure |
| 08/07/2013 | CN203114341U Mine inclined drift multi-stage pump frame moving device |
| 08/07/2013 | CN203114340U Drainage device for constructing inclined shaft |
| 08/07/2013 | CN103233742A Treatment measure of bad geological section for long distance pipeline coal conveying |
| 08/01/2013 | US20130192822 Mine Dewatering System And Method |
| 07/31/2013 | CN203097943U Underground mine safe drainage device with automatic pressure relieving function |
| 07/31/2013 | CN203097902U Construction structure for treating geological disasters of mud gushing and water burst of karst tunnel |
| 07/24/2013 | CN203081505U Mine underground drainage tank |
| 07/24/2013 | CN203081504U Auxiliary chute of tunnel ditch cable slot pouring concrete |
| 07/24/2013 | CN203081503U Underground air leak blocking and draining device of coal mines |