WebCPC CPC COOPERATIVE PATENT CLASSIFICATION

E21F　SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS

E21F 1/00 Ventilation of mines or tunnels; Distribution of ventilating currents (ventilating rooms or spaces in general F24F)

E21F 1/003 ・{Ventilation of traffic tunnels (during construction E21F 1/04 to E21F 3/00)}

E21F 1/006 ・{Ventilation at the working face of galleries or tunnels}

E21F 1/02 ・Test models (analogue computers therefor G06G 7/50)

E21F 1/04 ・Air ducts (suspension devices E21F 17/02)

E21F 1/06 ・・Duct connections (tube connections in general F16L)

E21F 1/08 ・Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators ({E21F 1/003 takes precedence}; ventilators in general F04D)

E21F 1/085 ・・{using compressed gas injectors}

E21F 1/10 ・Air doors ({E21F 1/003 takes precedence; air locks E21F 1/145; dam doors E21F 17/12}; doors in general E06B)

E21F 1/12 ・・Devices for automatically opening air doors

E21F 1/14 ・Air partitions; Air locks ({E21F 1/003 takes precedence}; dams E21F 17/103; air locks for foundations E02D)

E21F 1/145 ・・{Air locks (air doors E21F 1/10; dam doors E21F 17/12)}

E21F 1/16 ・Shaft covers

E21F 1/18 ・Gravity flow ventilation (E21F 1/02 to E21F 1/16 take precedence)

E21F 3/00 Cooling or drying of air (air-conditioning rooms or spaces in general F24F)

E21F 5/00 Means or methods for preventing, binding, depositing, or removing dust {(in combination with mining machines E21C 35/22)}; Preventing explosions or fires (dams E21F 17/103; applying liquids or other fluent materials to surfaces in general B05)

E21F 5/02 ・by wetting or spraying

E21F 5/04 ・・Spraying barriers (spray nipples, spraying in general B05B, B05D; picks with arrangements of fluid-spraying nozzles E21C 35/187)

E21F 5/06 ・・Fluids used for spraying

E21F 5/08 ・Rock dusting of mines; Depositing other protective substances

E21F 5/10 ・・Devices for rock dusting

E21F 5/12 ・・Composition of rock dust

E21F 5/14 ・Fluid barriers or rock dusters made to work by, or at the same time as, shots or explosions

E21F 5/143 ・・{Fluid barriers}

E21F 5/146 ・・{Rock dusters}

E21F 5/16 ・Layers of hygroscopic or other salts deposited on floors, walls, or the like, for binding dust; Deposition of such layers (dust-absorbing materials in general C09K 3/22)

E21F 5/18 ・Impregnating walls, or the like, with liquids for binding dust {(injections for improving soil or rock E21D 9/001; borehole closures, i.e. packers, for use during the injection process E21B 33/12)}

E21F 5/20 ・Drawing-off or depositing dust (dust-removing while drilling E21C 7/00; while slitting E21C 35/22)

E21F 7/00 Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose

E21F 9/00 Devices preventing sparking of machines or apparatus (preventing sparking of electric machines or apparatus H01K, H02K)

E21F 11/00 Rescue devices or other safety devices, e.g. safety chambers, escape ways (respiratory apparatus A62B 7/00; revival apparatus A62B 33/00; breathing aids for curative purposes A61H 31/00)

E21F 13/00 Transport specially adapted to underground conditions (mine cars B61D; transport in general, loading {unless specially adapted to underground conditions}B65G)

E21F 13/002 ・{Crushing devices specifically for conveying in mines}

E21F 13/004 ・{Staff transport system}

E21F 13/006 ・{Equipment transport systems}

E21F 13/008 ・・{for mine roof support units for step-by-step movement}

E21F 13/02 ・{Transport of mined mineral} in galleries

E21F 13/025 ・・{Shuttle cars}

E21F 13/04 ・{Transport of mined material} in gravity inclines; in staple or inclined shafts

E21F 13/042 ・・{Vertical hydraulic conveying of coal (conveying by water flow in general B65G 53/00)}

E21F 13/045 ・・{Bunkers specially adapted for mining purposes (chutes in general B65G 11/00)}

E21F 13/047 ・・{comprising helically running channels (chutes of helical form in general B65G 11/06)}

E21F 13/06 ・{Transport of mined material} at or adjacent to the working face

E21F 13/061 ・・{Chutes and braking conveyers for average and steep slopes, adapted for mining purposes (chutes in general B65G 11/00)}

E21F 13/063 ・・{Loading devices for use in mining}

E21F 13/065 ・・・{Scrapers (digging devices guided by cables E02F 3/54; combined with planing means E21C 27/42)}

E21F 13/066 ・・{Scraper chain conveyers (in general B65G 19/00)}

E21F 13/068 ・・・{Special 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}

E21F 13/08 ・Shifting conveyers or other transport devices from one location at the working face to another (guiding mining machines along conveyers for the cut mineral E21C 35/12; in combination with mine roof supports for step-by-step movement E21D 23/00)

E21F 13/083 ・・{Conveyer belts removing methods or devices}

E21F 13/086 ・・{Armoured conveyers shifting devices}

E21F 13/10 ・Anchorings for conveyers

E21F 15/00 Methods or devices for placing filling-up materials in underground workings (dams E21F 17/103; {chocks made of flexible containers filled with backfilling material E21D 15/483})

E21F 15/005 ・{characterised by the kind or composition of the backfilling material}

E21F 15/02 ・Supporting means, e.g. shuttering, for filling-up materials

E21F 15/04 ・・Stowing mats; Goaf wire netting; Partition walls

E21F 15/06 ・Filling-up mechanically

E21F 15/08 ・Filling-up hydraulically or pneumatically (hydraulic or pneumatic transport devices B65G; pipes, pipe couplings F16L)

E21F 15/10 ・・Hydraulic or pneumatic filling-up machines

E21F 16/00 Drainage (keeping dry foundation sites or other areas in the ground E02D 19/00)

E21F 16/02 ・of tunnels

E21F 17/00 Methods or devices for use in mines or tunnels, not covered elsewhere (mine lighting F21, H05B)

E21F 17/02 ・Suspension devices for tubes or the like, e.g. for ventilating ducts (supporting pipes, cables or protective tubing in general F16L 3/00 to F16L 7/00)

E21F 17/04 ・Distributing means for power supply in mines

E21F 17/06 ・・Distributing electric power; Cable networks; Conduits for cables (circuit arrangements for supplying or distributing electric power in general H02J)

E21F 17/08 ・・Distributing hydraulic power; Pipe networks for hydraulic liquid (pipe-line systems in general F17D)

E21F 17/10 ・・Distributing pneumatic power; Pipe networks for compressed air (pipe-line systems in general F17D)

E21F 17/103 ・Dams, e.g. for ventilation

E21F 17/107 ・・inflatable

E21F 17/12 ・・Dam doors {(air doors E21F 1/10; air locks E21F 1/145)}

E21F 17/16 ・Modification 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 B65G 5/00)

E21F 17/18 ・Special adaptations of signalling or alarm devices (for mine lifts B66B; gas-sensitive devices per se G01N)

E21F 17/185 ・・{Rock-pressure control devices with or without alarm devices; Alarm devices in case of roof subsidence (props with load-measuring devices E21D 15/46)}