ZA767719B
(en )
1977-11-30
Improvements in or relating to rock drilling and bolting gear
GB1556216A
(en )
1979-11-21
Apparatus for use in mining or tunnelling installations
GB1538788A
(en )
1979-01-24
Underground storage reservoirs and their operation
AU502292B2
(en )
1979-07-19
Mine prop
ZA761232B
(en )
1977-02-23
Improvements in mineral mining installations
ZA765847B
(en )
1977-09-28
Mining and like machinery
ZA764191B
(en )
1977-07-27
Improvements in or relating to coal mining
ZA761217B
(en )
1977-02-23
Improvements in conveyors for use in mineral mining
JPS5247914A
(en )
1977-04-16
Tablet and its prepation
ZA751950B
(en )
1976-02-25
Improvements in mine support assemblies
ZM12776A1
(en )
1977-07-21
Mining method
GB1552185A
(en )
1979-09-12
Conveyors for use in mineral mining installations
GB2000483B
(en )
1982-01-06
Apparatus for covering continuous conveyors used in underground coal mining
ZA731148B
(en )
1973-11-28
Shield lining units for use in underground extraction workings
ZA763827B
(en )
1977-06-29
Self-advancing and thrust application cylinder for the winning means in underground coal winning
ZA77163B
(en )
1977-11-30
Roof-supporting frame of the shield type for underground workings in mines
JPS5255203A
(en )
1977-05-06
Hydraulic system for rock crusher
ZA762355B
(en )
1977-05-25
Hydraulic shiled support unit for use in underground mining operations
ZA763598B
(en )
1977-09-28
Improvements in or relating to yieldable pit props
ZA763597B
(en )
1977-09-28
Improvements in or relating to yieldable pit props
NZ183791A
(en )
1980-04-28
Hydraulic mining apparatus aggregate separated into pumpable fraction and dry conveyable fraction
SE7513649L
(en )
1976-07-19
LOOSE CARTRIDGE FOR ANCHORING BOLTS IN MINES O.D.
ZA764331B
(en )
1977-07-27
Improvements in or relating to mining machine and mine installations
ZA754578B
(en )
1976-09-29
The stowing of materials in mine workings
GB2011979B
(en )
1982-05-19
Lining for shafts and roadways in mining and tunnelling