PL314802A1
(en )
1996-09-30
Method of determining properties of underground coal formations
PL304798A1
(en )
1995-03-06
Mining apparatus and method of mining in underground mines
PL300148A1
(en )
1995-02-20
Method of evaluating existing crump hazard in underground mine workings
PL302225A1
(en )
1995-08-21
Method of assessing crump hazard in mine workings
PL315439A1
(en )
1998-02-02
Active method of assessing degree of crump hazard in coal mine workings
GB2233999B
(en )
1993-07-07
An apparatus for making galleries or the like in underground mining operations or the like
PL298166A1
(en )
1993-09-06
Method of filling abandoned longwall workings
PL304306A1
(en )
1996-01-22
Apparatus for continuously moving heavy-duty machinery and equipment in underground mine workings
PL306705A1
(en )
1996-07-08
Method of eliminating water flooding hazards in underground mine workings
GB2283324B
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1997-11-26
Downhole logging apparatus and method
PL56123Y1
(en )
1998-05-29
Apparatus for demethansing mine workings in underground mines
PL304260A1
(en )
1996-01-22
Method of locally demethanising the low-methane underground mine workings
PL304589A1
(en )
1996-02-19
Method of filling abandoned underground mine workings and similar underground voids
PL289020A1
(en )
1991-09-09
Method of eliminating crump hazards in irregular rocky formations in the region of workings of underground ore mines
PL253270A1
(en )
1986-11-18
Method of detecting crump hazard conditions in underground mine workings
PL310649A1
(en )
1997-04-01
Method of and apparatus for filling abandoned underground mine workings
PL308724A1
(en )
1996-11-25
Method of assessing absolute cramp hazard state in hard coal mines
PL55109Y1
(en )
1997-04-30
Mine roof supports of limited compressibility especially for workings with crump hazard
PL54990Y1
(en )
1997-03-28
Apparatus for tyreating and doing away mining bore-holes
PL311354A1
(en )
1997-05-12
Apparatus for displacing machinery and equipment in mine workings
PL301648A1
(en )
1995-07-10
Method of handling heavy components of mining machinery and equipment in underground workings
PL288321A1
(en )
1992-06-26
Method of and apparatus for monitoring hazards in mine workings
PL305372A1
(en )
1996-04-15
System for continually moving overhung machinery and equipment in underground mine workings
PL304766A1
(en )
1996-03-04
Method activating underground formations
PL297464A1
(en )
1994-07-25
Method of depositing smoke-box dust in abandoned underground mine workings