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1996-06-10
Holder assembly for a drilling block of mining auger
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2002-10-30
Method of sealing off a mine passageway
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1995-12-21
Tunnel drilling machine of tube-driving machine
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1999-05-06
MINER EQUIPMENT TO MINING STRATA
PL323324A1
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1998-06-08
Short-wall mining machine for underground coal mines
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1996-09-26
Method for mining rock hollows
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1999-03-15
Method of protecting a mine working running along a longwall
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1995-07-24
Underground mining planer
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1997-04-01
Side shield for mine workings
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1999-08-16
Apparatus for identifying a place where miners working in underground parts of a mine are currently present
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1996-07-22
Partition for protecting working fields of longwall mine headings
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1996-09-02
Method of protecting mine workings against methane accumulation
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1995-11-15
Guide of a mining plough
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1999-03-30
Method of installing a mine prop
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1999-10-29
Cramp of a flexible lining for gallery-type mine workings
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1999-12-06
Method of supporting a roof of longwall splitting working
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1999-02-17
Method of setting a mine prop
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1997-05-12
Shackle constituting a part of mine working lining
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1996-01-22
Method of locally demethanising the low-methane underground mine workings
PL301769A1
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1995-07-10
Bore-hole sulphur mining method
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(en )
1996-07-08
Method of building a stank in an underground mine working
ZA9810723B
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1999-05-31
A device for sealing off the working area of a gallery driving or mining machine
PL281756A1
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1991-04-08
Method of protecting a mine working against upthrust of its floor
PL323845A1
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1999-06-21
Section of a mining scraper conveyor
PL55769Y1
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1998-01-30
Sledge of a mechanical coal miner for longwall use