PL317871A1
(en )
1997-04-28
Apparatus for and method of continually mining coal
PL304798A1
(en )
1995-03-06
Mining apparatus and method of mining in underground mines
GB8924083D0
(en )
1989-12-13
Rock drilling apparatus and method
ZA837482B
(en )
1985-02-27
Method and apparatus for fracturing of rock
GB2125468B
(en )
1985-11-06
Method and apparatus for boring and lining holes underground
GB2152558B
(en )
1986-12-17
Mining method and apparatus
GB8912021D0
(en )
1989-07-12
Improved method and apparatus for borehole drilling
PL249715A2
(en )
1985-07-30
Method of and apparatus for filling underground mine workings
PL256103A1
(en )
1987-07-27
Hydraulic mining method and apparatus
PL294966A1
(en )
1993-12-27
Method of and apparatus for placing coal mine waste rock into abandoned workings
PL284424A1
(en )
1991-08-26
Method of and apparatus for driving inclined mine workings
PL288321A1
(en )
1992-06-26
Method of and apparatus for monitoring hazards in mine workings
PL310649A1
(en )
1997-04-01
Method of and apparatus for filling abandoned underground mine workings
BG47295A1
(en )
1990-06-15
Method and device for making of underground stopes
PL266774A1
(en )
1989-01-23
Method of and apparatus for driving mine workings
PL273861A1
(en )
1990-01-22
Method of and arrangement of workings for mining minerals
ZA87381B
(en )
1987-12-30
Mine haulage method and apparatus
PL268154A1
(en )
1989-04-17
Method of and system for sealing mine workings
SU1488520A1
(en )
1989-06-23
Method and apparatus for mining outburst-hazardous seams
DE3761030D1
(en )
1989-12-28
Method of and apparatus for providing an underground tunnel
PL257853A1
(en )
1988-02-04
Method of mining useful minerals through bore-holes and apparatus therefor
ZA907831B
(en )
1991-07-31
Method for sealing mine workings
GB8729384D0
(en )
1988-01-27
Drilling apparatus for mine workings &c
ZA959646B
(en )
1996-06-10
Method of an apparatus for mining underground
PL304591A1
(en )
1996-02-19
Method of quickly erecting and dismantling underground mine longwall workings and apparatus therefor