GB2147260B
(en )
1986-11-19
Improvements in channel sections of scraper-chain conveyors
GB8618092D0
(en )
1986-09-03
Lining of tunnels
GB8623451D0
(en )
1986-11-05
Guiding wire in bolting of rock
DE3468472D1
(en )
1988-02-11
Safe arrangement and method of operating it
PL139762B2
(en )
1987-02-28
Method of preventing occurence of endogenous fires in sloped longwall caved workings
GB8628125D0
(en )
1986-12-31
Reducing ignition risk in mine workings
PL274266A1
(en )
1990-02-19
Method of preventing endogenous fire occurence in caved abandoned workings
PL254169A1
(en )
1986-12-30
Method of ventilating mine working under condition of high endogenous fire risk
PL240257A1
(en )
1984-07-30
Method of protecting galleries and workings
PL252637A1
(en )
1986-10-07
Method of forecasing risks of crumps in particular in coal mines
PL255889A1
(en )
1987-05-04
Method of permanent cut slope mining in an open pit mine
PL235294A1
(en )
1983-09-12
Method of preventing occurence of endogenous fire seats in natural coal
PL241732A2
(en )
1984-03-12
Method of actively extingushing fire in particular in mine workings
PL237270A1
(en )
1984-01-30
Method of and apparatus for preventing occurence of endogenous fires in underground caving areas
PL253763A1
(en )
1986-02-25
Set of equipment and machinery for longwall work in mines
PL241751A1
(en )
1984-11-08
Method of solubilization of coal
PL251521A1
(en )
1986-07-15
Method of indicating and recording presence of workers at predetermined places in underground mine workings
PL255671A1
(en )
1987-06-01
Method of filling mined-out voids
PL248400A1
(en )
1986-01-14
Method of extinguishing endogenous fires
ZA866936B
(en )
1987-05-27
Cutting of coal
PL248056A2
(en )
1985-04-09
Method of filling mined out workings in mines
PL253154A1
(en )
1986-11-18
Method of mining coal deposits and mechanical coal miner therefor
PL242211A2
(en )
1984-03-26
Mining and scraping head
PL251093A1
(en )
1986-07-01
Method of filling mined-out cavities at longwall workings
PL256369A1
(en )
1987-06-29
Method of replacing storage batteries in locomotives operating in underground mine workings