ZA877525B
(en )
1988-07-27
Method for remote control of a coal shearer
PL251424A1
(en )
1986-07-15
Method of mining a coal longwall provided with self-advancing roof supports
PL250634A1
(en )
1985-07-30
Apparatus for placing units of self-advancing hydraulic roof supports in underground mine workings in particular longwall workings
GB8424334D0
(en )
1984-10-31
Mine roof supports
PL247539A1
(en )
1985-12-17
Method of mining coal in a longwall system
PL252253A1
(en )
1986-09-09
Method of longwall mining of coal with a double-drum mechanical coal miner
PL261116A1
(en )
1987-05-18
Protective unit for longwall workings employing self-advancing roof supports
PL245716A1
(en )
1985-07-30
Mining head for a longwall mechanical coal miner
PL254577A1
(en )
1987-02-09
Self-advancing roof supports for cut-and-fill mining
PL252947A1
(en )
1986-10-21
Method of protecting roof while withdrawing self-advancing roof supports from mined out longwall heading
PL248153A1
(en )
1985-12-17
Underground assembly chamber for assembling mining equipment in particular self-advancing roof supports
PL252355A1
(en )
1985-12-03
Underground coal mining method
PL276080A1
(en )
1990-06-11
Method of setting up longwall self-advancing roof supports
PL254203A1
(en )
1986-12-30
Mining head of a longwall mechanical coal miner
ZA852380B
(en )
1985-11-27
Mine prop
PL248792A1
(en )
1986-02-11
Mining head for mechanical coal miners
PL249392A2
(en )
1985-07-02
Mechanized roof supports for mining steep coal deposits
PL253160A1
(en )
1986-11-18
Mining head of a longwall type mechanical coal miner
PL242976A1
(en )
1985-01-16
Mining head for longwall coal miners
PL255438A1
(en )
1987-03-23
Mining head for a mechanical coal miner of longwall type
PL251151A1
(en )
1986-07-01
Mechanical coal miner for mining longwalls
PL246656A1
(en )
1985-09-24
Mining head for a mechanical coal miner
PL249537A1
(en )
1986-03-11
Method of removing idividual steel roof supports from a mined down longwall working
PL248896A1
(en )
1986-02-11
Mechanical coal miner mining head
PL247861A1
(en )
1985-12-03
Longwall heading roof support