PL363108A1
(en )
2004-11-15
A coal and rock cutting pick
AU3571700A
(en )
2000-10-23
A drill rig for use in an underground mine
PL323324A1
(en )
1998-06-08
Short-wall mining machine for underground coal mines
PL377218A1
(en )
2006-01-23
Coal face support in a mine
PL330776A1
(en )
1999-07-19
Guinding and advancing mechanism of a coal mining machine in particular of a longwall mechanical coal miner
PL336104A1
(en )
2000-04-10
Method of storing methane in underground workings of a coal mine
PL315477A1
(en )
1998-02-02
Driving unit in particular for a longwall coal miner
PL344273A1
(en )
2002-06-03
Method fo protecting a system for removing methane from abandoned workings and unmined coal bed at a longwall with caving
PL341779A1
(en )
2001-02-12
Supporting and guiding system for mining conveyors and/or machines used in underground mine workings
ZA200101950B
(en )
2001-09-12
Provision of support in underground mine workings.
PL352005A1
(en )
2003-08-11
Method of cleaning already gotten coal in underground coal mine workings
PL317845A1
(en )
1997-07-21
Mining conveyor for an underground coal mine
PL335716A1
(en )
2001-04-09
Method of selectively mining a coal deposit using the longwall mining technique and a set of machinery and equipment therefor
PL352234A3
(en )
2003-08-25
Mining railway for underground mines
PL56123Y1
(en )
1998-05-29
Apparatus for demethansing mine workings in underground mines
PL315484A1
(en )
1998-02-02
Mining and loading unit of a longwall coal miner
PL324682A1
(en )
1999-08-16
Apparatus for identifying a place where miners working in underground parts of a mine are currently present
PL316594A1
(en )
1997-04-14
Method of using abandoned hard coal mine for storing earth gas
PL312850A1
(en )
1997-08-18
Arm of a longwall coal miner
PL313639A1
(en )
1997-10-13
Mining head of a longwall coal miner
PL315640A1
(en )
1998-02-16
Mining head of a longwall coal miner
PL329014A1
(en )
2000-04-10
Longwall mining mechanical coal miner advancing gear-box
PL332922A1
(en )
2000-11-06
Loader of a mechanical coal miner
PL349271A1
(en )
2003-02-24
Method of filling worked out mine workings in abandoned deep underground mines and a system therefor
PL325616A1
(en )
1999-10-11
Arm of a longwall mechanical coal miner