ZA726028B
(en )
1973-05-30
Method and device for dust collecting at air-flushed rock drilling
CA960593A
(en )
1975-01-07
Method of in situ coal gasification
CA970145A
(en )
1975-07-01
Method and composition for treating subterranean formations
ZA718673B
(en )
1972-09-27
Geological exploration method and apparatus
CA960707A
(en )
1975-01-07
Mining method
GB1385197A
(en )
1975-02-26
Tunnels
ZA714955B
(en )
1972-04-26
Rock drill
HK12676A
(en )
1976-03-19
Ammonia recovery and liquefaction
ZA718138B
(en )
1972-08-30
Method for the manufacture of a coal and device for carrying out that method
ZA707462B
(en )
1971-07-28
Rock drill
GB1386619A
(en )
1975-03-12
Subsidence wellhead assembly and method
GB1387263A
(en )
1975-03-12
Method of fastening pipes in boreholes
ZA724039B
(en )
1974-02-27
Fluid propelled mine haulage vehicle and method for underground haulage
ZA714364B
(en )
1972-03-29
Method for stabilising coal and loose mountain or like formations
ZA706294B
(en )
1971-08-25
Mining method
CA948755A
(en )
1974-06-04
Method and device for investigating properties of rock to establish the presence of loose blocks adjacent to the surface thereof
CA937744A
(en )
1973-12-04
Rock salt composition and method
AU4734872A
(en )
1974-04-11
Supporting the roof and walls of an underground tunnel
AU452803B2
(en )
1974-09-12
Carbonising coal
MY7400227A
(en )
1974-12-31
Improved radiological well logging method and apparatus
SU653404A1
(en )
1979-03-25
Method of ventilation of gas-abundant coal longwall
GB1388182A
(en )
1975-03-26
Rock boring
CA948986A
(en )
1974-06-11
Method for sealing earth formations
ZA724141B
(en )
1973-03-28
Method and apparatus for mining
HU173663B
(en )
1979-07-28
Coal distilling method