| Patents for E21F 15 - Methods or devices for placing filling-up materials in underground workings (1,589) |
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| 04/19/1994 | CA1328564C Filling cavities in mining |
| 02/22/1994 | US5287926 Method and system for underground gasification of coal or browncoal |
| 11/02/1993 | US5257691 Arrangement for transferring castable material without pipes from a feeding means to a destination |
| 09/30/1993 | DE4209987A1 Disposal of waste from industrial recycling - by mixing with alkaline wastes for underground filling |
| 08/26/1993 | DE4209986C1 Back filling of salt and potash open cast mining areas - using mixture of mining spoil mixed with milled industrial waste |
| 03/25/1993 | DE3608337C1 Apparatus for transporting finely divided or granular material - mixtures of construction material - (material to be conveyed) |
| 01/06/1993 | CN1067707A High-water material cementing fill technology for metal mine |
| 12/16/1992 | EP0518156A2 Improved materials based on gypsum, process for their manufacture and their use |
| 12/16/1992 | EP0517747A1 Method and system for underground gasification of coal or browncoal. |
| 12/15/1992 | CA2071051A1 Gypsum-based materials, process for their preparation and their use |
| 12/01/1992 | US5167474 Form for making a permanent concrete mine stopping |
| 11/26/1992 | DE4117053A1 Pipe run for carrying solids and fluids in mine - has vertical and horizontal sections and internal throttle sleeve fitted inside vertical pipe joints |
| 09/10/1992 | DE4207182A1 Mine space backfilling method - which delivers granular material mixed with water via drillings from gallery above |
| 09/03/1992 | DE4106097A1 Pneumatic stowing system installed in centre road terminating in longwall - comprises conveyor and machine with pipes to left and right in longwall, stowing material alternately in two flanking areas |
| 08/13/1992 | DE4104383A1 Salt-mine preservation method - uses solids of compression strength greater than rock pressure and gas cushion, greatly reduces risk of roof cracking |
| 07/23/1992 | DE4112323C1 Pipeline pressure relief mechanism - has inserted tube section with pressure relief bore closure by radially inserted valve |
| 04/30/1992 | DE4034026A1 Disposal of dangerous material such as asbestos - by forming material into pulp which is used as backfill in old mines |
| 11/14/1991 | WO1991017101A1 Device for the uncontained transfer of throwable material from a feed point to a destination point |
| 11/06/1991 | EP0455056A1 Transfer device without a conduit for materials by centrifugal force from a feeding station to a destination place |
| 10/30/1991 | CA2041382A1 Arrangement for transferring castable material without pipes from a feeding means to a destination |
| 09/05/1991 | WO1991013236A1 Method and system for underground gasification of coal or browncoal |
| 09/05/1991 | DE4002579A1 Monitoring pneumatic conveyor for filling-up underground workings - using parallel evacuated line to measure dust content, and instigate alarm at critical level |
| 08/21/1991 | CN1013605B Method and implements for retarding subsiding of earth surface above coal mine |
| 06/13/1991 | DE4013145C1 Backfilling mined cavities in coal mine - uses water absorbent waste material and mineral material, swelling on contact with water |
| 04/18/1991 | DE3933236A1 Mining roadway support fill - comprises piles of webbing cushions filled with hardened material laid in interlocking fashion |
| 04/11/1991 | DE3932046A1 Filling exhausted potassium mine cavities with dry wastes - pretreated with suspension or soln. of salt wastes |
| 03/14/1991 | DE3929162A1 Clogging fracturing space in longwall working process - by using hydraulic mixt. of foundry shake-out sand, water and sec substance before mining |
| 03/05/1991 | CA1280901C Pretreatment of solid wastes, and wastes to be compacted, for introduction into underground salt cavities or salt caverns via a downpipeunder the force of gravity |
| 01/23/1991 | CN1011326B Method for cutting off waters in natural and/or man-made under groundcavity or tunnel with rock stuffing |
| 11/30/1990 | CA2017768A1 Method of manufacturing a continuous seamless tube of woven textile fabric material and a back-filling bag made from the continuous tube of material |
| 11/15/1990 | DE4014798A1 Under-ground mine backfilling system - delivers compacted clay sediment to mixer simultaneously with powder |
| 11/14/1990 | CN1010423B Process for sealing off the water flowing in tunnels, mine entries, canals and other known subsurface ducts |
| 11/06/1990 | US4968187 System for backfilling a subterranean void |
| 09/06/1990 | DE3906206A1 Pneumatic stowing pipe for front discharge of stowing in underground operation |
| 08/22/1990 | EP0383362A2 Method for backfilling underground excavations, in particular in coal mines |
| 08/09/1990 | DE3903437A1 Arrangement for constructing dams in underground working from powdery construction material and from dam casings |
| 07/26/1990 | DE3901271A1 Conveying tube for suspended debris, in particular for pneumatic stowing in underground operations |
| 05/16/1990 | CN1042139A Mine expansion fire stopping-up material |
| 03/22/1990 | DE3925639A1 Coal-mine gallery-backfilling system - uses fine granular free-flowing material introduced at roof |
| 03/21/1990 | CN1007283B Method and equipment of filling a caving district in coal mine by waste rocks |
| 03/01/1990 | DE3829473A1 Method of keeping the cells of a drum-type pneumatic-stowing machine free of caking from stowing, and drum-type pneumatic-stowing machine for carrying out the method |
| 02/21/1990 | CN1039872A Pump-carrying high-consistency full auxiliary rotor making technology |
| 02/08/1990 | DE3826521A1 Device for wetting pack construction materials |
| 02/08/1990 | DE3249786C2 Use of the residual solids from dry flue gas desulphurisation as building material for producing shaped objects |
| 12/28/1989 | DE3830413C1 Wheel pneumatic stower with cellular wheel and housing which have wearing layers |
| 12/28/1989 | DE3827676C1 Arrangement for transporting powdery or granular material - construction-material mixtures (material to be conveyed) - for use in underground mining or tunnelling |
| 12/12/1989 | US4886393 Pretreatment of solid wastes, and wastes to be compacted, for introduction into underground salt cavities of salt caverns via a downpipe under the force of gravity |
| 11/09/1989 | DE3814393A1 Chain scraper conveyor having lateral discharge, in particular for use as a conveyor for stowage material in mining operations |
| 09/28/1989 | DE3814035C1 Connection between a straight steel pipe and an arcuate cast pipe |
| 09/21/1989 | DE3823123C1 Pneumatic-stowing pipeline which can be fitted in advancing powered support assemblies and can be shifted with them |
| 08/17/1989 | DE3803744A1 Automotive, articulated centrifugal packing machine |
| 08/17/1989 | DE3803359A1 Method and arrangement for the pneumatic stowing of gate roads in underground mining |
| 08/10/1989 | DE3901920A1 Apparatus for high-pressure injection |
| 06/27/1989 | US4842444 Method for displacing oxygen from a mine |
| 05/18/1989 | DE3737472A1 Backfilling apparatus for roadway support machines |
| 04/12/1989 | CN1032378A Method and implements for retarding subsiding of earth surface above coal mine |
| 03/23/1989 | DE3729293A1 Wheel pneumatic stower, in particular for the stowage in underground operation |
| 01/05/1989 | DE3721090A1 Pneumatic stowing line with simplified rotary drive discharge |
| 12/21/1988 | EP0295447A1 Hydraulic control of a coupling of a backfilling pipeline for end delivery |
| 12/07/1988 | EP0293686A1 Method for backfilling underground excavations and device for carrying out such a method |
| 12/07/1988 | CN87101337A Method and equipment of filling a caving district in coal mine by waste rocks |
| 11/23/1988 | EP0291672A2 Method for processing coalmine refuse |
| 11/22/1988 | US4786211 Filling cavities in mining |
| 11/03/1988 | DE3713413A1 Installation for pneumatic stowing in underground operation |
| 11/03/1988 | DE3709437A1 Stope support for pneumatic stowing |
| 08/04/1988 | DE3706778A1 Pneumatic stowing in underground mining, especially for the pneumatic backfilling of headway timbering by means of a fine-grained to pulverulent material |
| 07/28/1988 | DE3701228A1 Method and apparatus for pneumatically stowing fly ash in underground operation |
| 07/14/1988 | DE3708194C1 Apparatus for introducing stowing material into cleared-out spaces of an underground mining working |
| 07/05/1988 | CA1238792A1 Process for dumping of particulate solid or pumpable solid and liquid waste materials in underground salt enclosed cavities, in particular salt caverns |
| 05/31/1988 | US4747642 Control of subsidence during underground gasification of coal |
| 05/26/1988 | DE3639997A1 Compact pneumatic-stowing station |
| 04/28/1988 | DE3642074C1 Safety control device for a hydraulic round-head discharge |
| 04/26/1988 | US4740114 Jet stower |
| 04/21/1988 | DE3635185A1 Slip form wall for constructing a roadside pack |
| 04/21/1988 | DE3627413A1 Method of restoring the development capacity of surfaces of land after the working of coal and other minerals close to the surface |
| 04/06/1988 | EP0262377A1 Process for filling cavities in mines |
| 03/02/1988 | EP0257652A1 Method of and device for driving a coal winning gallery partly in the footwall of a seam |
| 02/25/1988 | DE3619542A1 Disposal of contaminated earth and/or residues |
| 02/23/1988 | US4726712 Method of pipeline filling the interstices of controlled caving areas |
| 02/18/1988 | DE3627049C1 Pipe-rotating mechanism for pneumatic stowing lines |
| 01/28/1988 | DE3624926A1 Multi-component container |
| 01/27/1988 | CN87103870A Process for sealing off the water flowing in tunnels, mine entries, canals and other known subsurface ducts |
| 01/21/1988 | DE3621058A1 Method and device for applying complete stowing |
| 12/23/1987 | DE3620805A1 The retreat working of development roads |
| 12/10/1987 | DE3632494C1 Apparatus for transporting finely divided or granular material - mixtures of construction material (material to be conveyed) |
| 11/05/1987 | DE3614303A1 Wheel pneumatic stower |
| 10/29/1987 | DE3613464A1 Apparatus for transporting pulverulent or granular material - mixtures of construction material - (material to be conveyed) |
| 10/14/1987 | CN87103428A Method of backfilling longwall workings and dam for backfilling longwall workings |
| 10/08/1987 | DE3710839A1 Versetzverfahren der strebraeume sowie damm zur versetzung von strebraeumen Versetzverfahren the strebraeume and embankment for dislocation of strebraeumen |
| 10/01/1987 | DE3608926A1 Pneumatic conveying system for underground operation for the delivery of dusty to floury construction materials |
| 09/08/1987 | US4692061 Process for dumping of particulate solid waste materials in underground salt enclosed cavitives |
| 09/03/1987 | DE3635665C1 Displacement mechanism for mine roof support air pipes - has housing of displacement ram firmly coupled to hoist ram housing, with both rams guided by cams in support head duct |
| 08/27/1987 | DE3704731A1 Backfilling with flotation wastes |
| 08/20/1987 | DE3604825A1 Process for disposing of crude gypsum in flotation tailings in underground mining |
| 08/06/1987 | DE3602958A1 Pneumatic conveying installation for underground working for delivering powdery to farinaceous building materials |
| 08/05/1987 | EP0230913A2 Method for pretreatment of both solid waste and waste not yet solidified which is to be introduced into underground salt cavities or caverns by means of free fall through a soil pipe |
| 07/16/1987 | DE3631214A1 Pneumatic-stowing wall |
| 07/16/1987 | DE3600878A1 Pneumatic stowing installation for longwall face working in underground operation |
| 07/16/1987 | DE3600128A1 Consolidation of face excavations |
| 07/09/1987 | DE3644581A1 Process for backfilling cavities in underground mining |