GB1547494A
(en )
1979-06-20
Rock drilling and golt inserting apparatus
ZA774652B
(en )
1978-06-28
Method of mine backfilling and material therefor
GB2039971B
(en )
1983-03-30
Method of selective underground mining and stabilization of rock cavities
JPS531202A
(en )
1978-01-09
Method of liquefying coal
JPS5369201A
(en )
1978-06-20
Method of liquefying coal
ZA763697B
(en )
1977-05-25
Method of underground mining
GB1542541A
(en )
1979-03-21
Method and apparatus for sinking boreholes
GB1544943A
(en )
1979-04-25
Method of and machine for mining minerals
ZA761232B
(en )
1977-02-23
Improvements in mineral mining installations
ZA774637B
(en )
1978-06-28
Rock drilling method
JPS5247802A
(en )
1977-04-16
Method of treating coal channel in underground coal gasification
JPS537587A
(en )
1978-01-24
Method of crushing inorganic or fossillorganic minerals
JPS5371105A
(en )
1978-06-24
Method of liquefying coal
HU178007B
(en )
1982-02-28
Method and apparatus for cooling mine air at underground mining
ZA756817B
(en )
1977-06-29
Mining method
CS182195B1
(en )
1978-04-28
Method of degasification of gaseous zones in underground mines
ZA77163B
(en )
1977-11-30
Roof-supporting frame of the shield type for underground workings in mines
JPS5373401A
(en )
1978-06-29
Method of crushing base rock
JPS534311A
(en )
1978-01-14
Method of continuous underground wall
JPS5320632A
(en )
1978-02-25
Method of building underground tank
JPS5220301A
(en )
1977-02-16
Method of mining coal in heap layer
JPS5330140A
(en )
1978-03-22
Method of underground building structure
JPS5356834A
(en )
1978-05-23
Construction method of underground structure that use tunnel
PL237807A2
(en )
1983-06-20
Method of preventing crumps in underground mines
JPS5293104A
(en )
1977-08-05
Method of checking landslide