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1985-02-27
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1986-08-30
Method of and apparatus for filling underground mine workings
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1986-12-17
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1986-07-15
Method of and apparatus for mining filled longwalls
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1991-06-03
Method of and apparatus for dewatering underground mine workings
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1987-07-27
Hydraulic mining method and apparatus
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1984-02-13
Method of filling boreholes opening in underground workings
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1985-04-09
Method of filling mined out workings in mines
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1989-12-28
Method of and apparatus for providing an underground tunnel
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1984-03-12
Method of checking mine workings for their condition and quality of filling them
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1989-04-17
Method of and system for sealing mine workings
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1990-06-15
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1985-04-09
Method of filling and sealing workings in mines and apparatus therefor
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1997-04-01
Method of and apparatus for filling abandoned underground mine workings
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1993-09-06
Method of filling abandoned longwall workings
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1989-05-16
Method of and apparatus for arresting mining cras in inclined mine workings
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1993-12-27
Method of and apparatus for placing coal mine waste rock into abandoned workings
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1986-11-18
Method of detecting crump hazard conditions in underground mine workings
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1985-12-17
Method of carrying out sealing operation on mine tubbing and apparatus therefor
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1985-07-30
Method of filling empty spaces and sealing mine workings
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1987-07-13
Method of adapting mining machines and equipment for operation in gassy mines
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1989-12-11
Method of filling underground voids in particular abandoned mine workings
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1986-07-01
Method of filling mined-out cavities at longwall workings
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1990-01-22
Method of and arrangement of workings for mining minerals
PL266774A1
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1989-01-23
Method of and apparatus for driving mine workings