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Method of determining properties of underground coal formations
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Mining apparatus and method of mining in underground mines
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1988-09-01
Refilling voids in underground mine workings
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1991-01-02
Method of forming underground passage and tunnel excavator
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1996-02-19
Method of filling abandoned underground mine workings and similar underground voids
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1993-09-06
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1997-04-01
Method of and apparatus for filling abandoned underground mine workings
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1989-12-11
Method of filling underground voids in particular abandoned mine workings
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1996-01-22
Method of sealing the rock mass and/or filling underground voids
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1996-06-24
Method of filling mined-out voids in rock mass
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1996-01-22
Method of locally demethanising the low-methane underground mine workings
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1996-07-08
Method of eliminating water flooding hazards in underground mine workings
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1991-02-11
Composition for filling voids and gaps around mine workings
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2000-07-03
Method of thickening hydraulic filling in abandoned underground mine workings
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1998-06-22
Method of locating flying dusts in voids of goafs of abandoned caved workings of underground mines
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2002-05-20
Method of introducing filling materials into abandoned mine working voids and set of equipment therefor
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1986-08-30
Method of and apparatus for filling underground mine workings
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1998-08-03
Method of producing mine voids filling materials
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1994-08-08
Method of placing polluted water into abandoned underground mine workings
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1996-02-19
Method of quickly erecting and dismantling underground mine longwall workings and apparatus therefor
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1999-03-29
Method of dewatering underground mine workings
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1995-02-20
Method of evaluating existing crump hazard in underground mine workings
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1993-04-05
Method of depositing waste in abandoned workings of underground mines and apparatus therefor
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1987-03-23
Method of filling worked-out voids in underground mines