PL295674A1
(en )
1993-03-22
Roof supporting system for mine workings and method of supporting roofs of mine workings
GB2142074B
(en )
1987-04-23
Control of mine roof supports
ZA874566B
(en )
1987-12-30
Mine roof supports
GB2191236B
(en )
1990-04-04
Mine roof supports
PL276080A1
(en )
1990-06-11
Method of setting up longwall self-advancing roof supports
GB8617160D0
(en )
1986-08-20
Mine roof supports
GB2199068B
(en )
1991-01-09
Mine roof supports
GB8424334D0
(en )
1984-10-31
Mine roof supports
GB2196371B
(en )
1990-05-09
Mine roof supports
GB8707842D0
(en )
1987-05-07
Mine/tunnel roof supports
GB2188665B
(en )
1990-02-21
Mine roof supports
PL270758A1
(en )
1989-08-21
Method of assebling light-weight self-advancing roof supports
ZA852380B
(en )
1985-11-27
Mine prop
PL288132A1
(en )
1992-06-15
Shield-type self-advancing roof supports and method of advancing them
PL274538A1
(en )
1990-03-19
Hydraulic system of self-advancing roof supports
PL254577A1
(en )
1987-02-09
Self-advancing roof supports for cut-and-fill mining
PL292674A1
(en )
1993-06-14
Method of controlling operation of self-advancing roof supports mining complex and self-advancing roof supports therefor
PL275809A1
(en )
1990-05-28
Extension piece for an advancing system of self-advancing roof support
PL256028A1
(en )
1987-05-18
Method of controllably govarning mine roof deflexion
PL284461A1
(en )
1991-10-07
Method of supporting roofs in longwall mine workings
PL264426A1
(en )
1988-11-24
Self-advancing roof supports for longwall cavities
GB8615901D0
(en )
1986-08-06
Mine/tunnel roof supports
PL243755A1
(en )
1985-03-26
Hydraulic prop for self-advancing roof supports
PL252947A1
(en )
1986-10-21
Method of protecting roof while withdrawing self-advancing roof supports from mined out longwall heading
PL273731A3
(en )
1990-01-22
Self-advancing roof supports