| Patents for E21F 16 - Drainage (1,138) |
|---|
| 11/28/2012 | CN202556846U FP two-dimensional composite board |
| 11/28/2012 | CN102797499A Drainer |
| 11/28/2012 | CN102797498A Automatic draining system and method for mine gas extraction pipe network |
| 11/28/2012 | CN102797469A Method for constructing inclined shaft by applying TBM (Tunnel Boring Machine) with earth pressure balancing function |
| 11/21/2012 | CN202545376U Anti-blocking device for water suction faucet of mine water pump and mine drainage system |
| 11/21/2012 | CN202544925U One-hole dual-purpose tunnel drain hole structure |
| 11/21/2012 | CN202544924U Underground automatic drainage device for a coal mine |
| 11/14/2012 | CN202531240U Wind pressure drainage device for long and large tunnel |
| 11/14/2012 | CN202531239U Brine ice-removing device for rail tunnel |
| 11/14/2012 | CN202531238U Vertical shaft metering and dewatering device |
| 11/14/2012 | CN202531237U Mine fiber reinforced plastic deflector groove |
| 11/14/2012 | CN202531218U Single-port negative pressure automatic drainage device of pumping-releasing gas pipeline |
| 11/14/2012 | CN202531217U Automatic residue and water discharging device |
| 11/14/2012 | CN102777210A Tunnel network waterproof-drainage board |
| 11/14/2012 | CN102777209A Automatic water discharging device |
| 11/07/2012 | CN202520380U Draining board special for tunnel |
| 11/07/2012 | CN202520370U Draining mechanism of gas extraction pipe |
| 11/07/2012 | CN202520368U Water and recrement discharger used in gas extraction operation |
| 11/07/2012 | CN102767393A Negative pressure automatic water discharge device |
| 10/31/2012 | CN102758632A Rock stratum double initial support layering method for establishing large-scale underground structure |
| 10/31/2012 | CN102080568B Method for reducing water pressure of covering layer of mine transferred from opencast mine to underground mine |
| 10/30/2012 | US8297350 Method and system for accessing subterranean deposits from the surface |
| 10/24/2012 | CN202500608U Underground water collecting and draining system |
| 10/24/2012 | CN202500607U Device for drilling and draining towards holes under coal layer |
| 10/24/2012 | CN202500521U High-pressure large flow water inrush borehole safety system |
| 10/24/2012 | CN102748072A Automatic slag and water discharging machine |
| 10/24/2012 | CN102094677B Emergency equipment for adverse-slope tracking water drainage and silt discharging in tunnel construction |
| 10/17/2012 | CN202493287U Multi-functional filtering water filling well |
| 10/17/2012 | CN202493277U Preventive collecting system for leaking water and seeping water in tunnel |
| 10/17/2012 | CN102733851A Control method for water-containing collapse columns in mining affected areas of combined reconstructed mines |
| 10/17/2012 | CN102733847A Mine roadway oval double-open type all-automatic disaster plugging and prevention device |
| 10/17/2012 | CN102733846A Oval single-open full-automatic disaster blocking-preventing device used in mine roadway |
| 10/17/2012 | CN102733845A Full-automatic disaster block prevention device with double-open tablet for mine |
| 10/10/2012 | CN202483611U A gas-water separate type negative-pressure water discharge device for gas pipes |
| 10/10/2012 | CN202483588U Self water-proof drainage system of tunnel lining |
| 10/10/2012 | CN102720511A Tunnel construction structure for draining and desilting |
| 10/10/2012 | CN102720473A Method for exploiting coal bed gas |
| 10/03/2012 | CN202467926U Railway tunnel deicer |
| 10/03/2012 | CN202467925U Three-way type pumping drainage device |
| 10/03/2012 | CN202467901U Escape capsule |
| 10/03/2012 | CN202467897U High-negative-pressure automatic water discharging device for gas drainage pipeline |
| 10/03/2012 | CN102705006A Method for governing operating tunnel flood by adopting wellpoint dewatering method |
| 10/03/2012 | CN102705005A Technology for plugging water bursting in mine by directional diversion grouting |
| 10/03/2012 | CN102704985A Automatic water draining device for coal mine gas extraction pipeline under negative pressure |
| 10/03/2012 | CN102704935A Extra-long working surface fully mechanized coal mining process |
| 09/26/2012 | CN202450564U Sludge absorbing and discharging pipe for mine sump |
| 09/26/2012 | CN202450482U Deicing rod on top and at high place of tunnel |
| 09/26/2012 | CN102691516A Full-automatic disaster blocking-preventing device for mine shaft winch tunnel |
| 09/19/2012 | CN102678174A Tunnel drainage system passing through permafrost region and non-frozen ground region and arrangement method thereof |
| 09/19/2012 | CN102678170A Full-automatic disaster plugging and prevention device for mine overhead rail and rope roadway |
| 09/19/2012 | CN102678169A Full-automatic disaster blocking preventing device for mine drift |
| 09/19/2012 | CN102678168A Full-automatic disaster plugging and preventing device for mine railway transportation lane |
| 09/19/2012 | CN102678165A Integral combining device for extraction pipeline |
| 09/12/2012 | CN102661172A Advanced precipitation method for deep-buried tunnel |
| 09/12/2012 | CN102661171A Frost damage prevention drainage system for tunnel |
| 09/05/2012 | CN202417594U Gas-liquid separation automatic liquid discharging device of mine pressure ventilation pipeline |
| 09/05/2012 | CN202417593U Elastic negative-pressure automatic slagging water discharge device |
| 09/05/2012 | CN202417575U Automatic water drainage slag discharge device for mine gas drainage system |
| 09/05/2012 | CN102654061A Pipeline water storage and discharge device and gas extraction system |
| 08/29/2012 | CN202404414U Monitoring and controlling system for water level of mine sump |
| 08/29/2012 | CN202402077U Flat and straight linear highway tunnel with drainage system |
| 08/29/2012 | CN202402076U Drainage pump station for underground line intervals of rail traffic |
| 08/22/2012 | CN202391473U Water discharging device with pressure reducing valve |
| 08/22/2012 | CN202391472U Sub-pressure water drainage device for gas drainage |
| 08/22/2012 | CN102644626A Anti-blocking device of water suction faucet of mine water pump and mine drainage system |
| 08/22/2012 | CN102644479A Automatic water drainage device for gas extraction |
| 08/22/2012 | CN102061939B Automatic drainer |
| 08/22/2012 | CN101113663B Mechanical water-shutoff construction method of mine hydrophthalmos and plugging apparatus for water-shutoff |
| 08/15/2012 | CN202383473U PLC (Programmable Logic Controller)-based automatic mine drainage control system |
| 08/15/2012 | CN102635402A Siphon drainage method for tunnel wall water seepage disposal by using dipping borehole |
| 08/15/2012 | CN102635401A Negative-pressure automatic water bleeding device |
| 08/14/2012 | CA2504063C Device and a method for drainage of water from rock caves |
| 08/08/2012 | CN202370583U Automatic water draining device |
| 08/08/2012 | CN202370582U Mining drainer |
| 08/08/2012 | CN202370539U Front tunnel face excavated soil pre-reinforcing structure of tunnel |
| 08/08/2012 | CN202370536U Bridge-tunnel connected tunnel structure of high speed railway |
| 08/08/2012 | CN102628372A Method for determining minimum buried depth of underground tunnel based on engineering control measures |
| 08/01/2012 | CN202360140U Horizontal special well pipe for construction water blockage of underground passages |
| 08/01/2012 | CN202360130U Gas drainage collection box |
| 08/01/2012 | CN102619560A Drainage and drainage method for long-distance reverse-slope tunnels |
| 08/01/2012 | CN102619519A Ore drawing technique for controlling fluidity of ore rocks via pillarless vertical end-wall sublevel caving method |
| 08/01/2012 | CN102619518A Ore drawing technique for controlling fluidity of ore rocks via pillarless cornice end-wall sublevel caving method |
| 07/25/2012 | CN202348342U Manual drainage device |
| 07/25/2012 | CN202348341U Full automatic gas-water separation drainage device |
| 07/25/2012 | CN202348323U Coal mine gas drainage drill combination hole-main pipe hole linkage structure |
| 07/25/2012 | CN102606208A Automatic drainage process of downward through beds hole |
| 07/25/2012 | CN102606127A Gasification furnace underground water prevention and control method and device for underground coal gasification |
| 07/25/2012 | CN101737066B Tunnel suspended protective light plate and preparation method thereof |
| 07/18/2012 | CN202338662U 防回气防回水泄爆装置 Anti-anti-return back to the gas venting device |
| 07/18/2012 | CN202337923U 电气化铁路隧道内融冰装置 Electrified railway tunnels melting ice means |
| 07/18/2012 | CN102587984A Distribution type water information monitoring system for underground working face of coal mine |
| 07/18/2012 | CN102587938A Water seepage and leakage preventability collection system for tunnel and construction method of system |
| 07/18/2012 | CN102587920A Tunnel entrance bias section construction method |
| 07/11/2012 | CN202331224U 煤矿用本安型全自动水位控制器 Mine intrinsically safe automatic water level controller |
| 07/11/2012 | CN202325681U Maintainable drainage system in tunnel |
| 07/11/2012 | CN202325680U Drain cover plate convenient to detach and replace for under-crossing tunnel |
| 07/11/2012 | CN202325679U Water-draining ditch cover plate with filtering and isolating groove for downward-penetrating type tunnel |
| 07/11/2012 | CN202325678U Detachable drainage ditch cover plate having filtering and isolating device for tunnels |
| 07/11/2012 | CN202325677U 一种地道变形缝处排水结构 Deformation at a genuinely drainage structures |
| 07/11/2012 | CN202325676U Recrement discharge valve used underground for probing and draining goaf water |