E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELSIn this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme. E21F1/00Ventilation of mines or tunnels E21F1/00Ventilation of mines or tunnelsDistribution of ventilating currents ventilating rooms or spaces in general F24F E21F1/003Ventilation of traffic tunnels during construction E21F1/04 - E21F3/00 E21F1/006Ventilation at the working face of galleries or tunnels E21F1/02Test models analogue computers therefor G06G7/50 E21F1/04Air ducts suspension devices E21F17/02 E21F1/06Duct connections tube connections in general F16L E21F1/08Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators E21F1/003 takes precedence; ventilators in general F04D E21F1/085using compressed gas injectors E21F1/10Air doors E21F1/003 takes precedence; air locks E21F1/145; dam doors E21F17/12; doors in general E06B E21F1/12Devices for automatically opening air doors E21F1/14Air partitionsAir locks E21F1/003 takes precedence; dams E21F17/103; air locks for foundations E02D E21F1/145Air locks air doors E21F1/10; dam doors E21F17/12 E21F1/16Shaft covers E21F1/18Gravity flow ventilation E21F1/02 - E21F1/16 take precedence E21F3/00Cooling or drying of air air-conditioning rooms or spaces in general F24F E21F5/00Safety devices flue-gas indicators G01NRescue devices E21F5/00Means or methods for preventing, binding, depositing, or removing dust in combination with mining machines E21C35/22Preventing explosions or fires dams E21F17/103; applying liquids or other fluent materials to surfaces in general B05 E21F5/02by wetting or spraying E21F5/04Spraying barriers spray nipples, spraying in general B05B, B05D; picks with arrangements of fluid-spraying nozzles E21C35/187 E21F5/06Fluids used for spraying E21F5/08Rock dusting of minesDepositing other protective substances E21F5/10Devices for rock dusting E21F5/12Composition of rock dust E21F5/14Fluid barriers or rock dusters made to work by, or at the same time as, shots or explosions E21F5/143Fluid barriers E21F5/146Rock dusters E21F5/16Layers of hygroscopic or other salts deposited on floors, walls, or the like, for binding dustDeposition of such layers dust-absorbing materials in general C09K3/22 E21F5/18Impregnating walls, or the like, with liquids for binding dust injections for improving soil or rock E21D9/001; borehole closures, i.e. packers, for use during the injection process E21B33/12 E21F5/20Drawing-off or depositing dust dust-removing while drilling E21B21/011; while slitting E21C35/22 E21F7/00Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose E21F9/00Devices preventing sparking of machines or apparatus preventing sparking of electric machines or apparatus H01K, H02K E21F11/00Rescue devices or other safety devices, e.g. safety chambers or escape ways breathing aids for curative purposes A61H31/00; respiratory apparatus A62B7/00; breathing apparatus for accidentally buried persons A62B33/00 E21F13/00Transport specially adapted to underground conditions mine cars B61D; transport in general, loading unless specially adapted to underground conditions B65G E21F13/002Crushing devices specifically for conveying in mines E21F13/004Staff transport system E21F13/006Equipment transport systems E21F13/008for mine roof support units for step-by-step movement E21F13/02Transport of mined mineral in galleries E21F13/025Shuttle cars E21F13/04Transport of mined material in gravity inclinesin staple or inclined shafts E21F13/042Vertical hydraulic conveying of coal conveying by water flow in general B65G53/00 E21F13/045Bunkers specially adapted for mining purposes chutes in general B65G11/00 E21F13/047comprising helically running channels chutes of helical form in general B65G11/06 E21F13/06Transport of mined material at or adjacent to the working face E21F13/061Chutes and braking conveyors for average and steep slopes, adapted for mining purposes chutes in general B65G11/00 E21F13/063Loading devices for use in mining E21F13/065Scrapers digging devices guided by cables E02F3/54; combined with planing means E21C27/42 E21F13/066Scraper chain conveyors in general B65G19/00 E21F13/068Special adaptations for use at the junction of the working face with the gallery, e.g. driving stations coupled to the driving station of the winning machine E21F13/08Shifting conveyors or other transport devices from one location at the working face to another guiding mining machines along conveyors for the cut mineral E21C35/12; in combination with mine roof supports for step-by-step movement E21D23/00 E21F13/083Conveyor belts removing methods or devices E21F13/086Armoured conveyors shifting devices E21F13/10Anchorings for conveyors E21F15/00Methods or devices for placing filling-up materials in underground workings dams E21F17/103 ; chocks made of flexible containers filled with backfilling material E21D15/483 E21F15/005characterised by the kind or composition of the backfilling material E21F15/02Supporting means, e.g. shuttering, for filling-up materials E21F15/04Stowing matsGoaf wire nettingPartition walls E21F15/06Filling-up mechanically E21F15/08Filling-up hydraulically or pneumatically hydraulic or pneumatic transport devices B65G; pipes, pipe couplings F16L E21F15/10Hydraulic or pneumatic filling-up machines E21F16/00Drainage keeping dry foundation sites or other areas in the ground E02D19/00 E21F16/02of tunnels E21F17/00Methods or devices for use in mines or tunnels, not covered elsewhere mine lighting F21, H05B E21F17/02Suspension devices for tubes or the like, e.g. for ventilating ducts supporting pipes, cables or protective tubing in general F16L3/00 - F16L7/00 E21F17/04Distributing means for power supply in mines E21F17/06Distributing electric powerCable networksConduits for cables circuit arrangements for supplying or distributing electric power in general H02J E21F17/08Distributing hydraulic powerPipe networks for hydraulic liquid pipe-line systems in general F17D E21F17/10Distributing pneumatic powerPipe networks for compressed air pipe-line systems in general F17D E21F17/103Dams, e.g. for ventilation E21F17/107inflatable E21F17/12Dam doors air doors E21F1/10; air locks E21F1/145 E21F17/16Modification of mine passages or chambers for storage purposes, especially for liquids or gases storing fluids in natural or artificial cavities or chambers in the earth B65G5/00 E21F17/18Special adaptations of signalling or alarm devices for mine lifts B66B; gas-sensitive devices per se G01N E21F17/185Rock-pressure control devices with or without alarm devices; Alarm devices in case of roof subsidence props with load-measuring devices E21D15/46