Loading ...
geologic conditions , the geometric design of coal mine ex(passive) are influenced byCoal bumps
geologic conditions , the geometric design of coal mine excavations , and the sequence and rate of extraction(passive) are influenced byCoal bumps
geologic conditions , the geometric design of coal mine excavations , and the sequence , China , India , and the Republic of South Africa , Wasatch Plateau and Book Cliffs coal mining districts , Utah , USA(passive) are influenced byCoal bumps
coal seam effusion and oriented fractures ... the effective wayto preventcoal bump occurring
The following rapscallionsdiscoveredlumps of coal
gob areascan resultin coal mine bumps
the conditions likelyto resultin " coal bumps
normal faults in coal mining with hard roof and hard coal(passive) influenced bycoal bumps
Hard roof stratamay causecoal bumps or
the most important variablescontributingto coal bumps
individual factorscontributeto coal bumps
collapsing of the mine panel andcausedcollapsing of the mine panel and
high - pressure steam that drives electric turbinesto createhigh - pressure steam that drives electric turbines
torchescreatetorches
from excessive pillar stress which was caused by load transfer from the extracted , noncaving , portion of the panelresultedfrom excessive pillar stress which was caused by load transfer from the extracted , noncaving , portion of the panel
to suit your layoutpaintedto suit your layout
VLF detector fits toocan causeVLF detector fits too
with little happy snowmenpaintedwith little happy snowmen
the poor prices(passive) caused bythe poor prices
http://bbs.home.news.cn / upfiles/033DBA85.002C http://bbs.home.news.cn /how to contributehttp://bbs.home.news.cn / upfiles/033DBA85.002C http://bbs.home.news.cn /
the United States in terms of lung diseasesleadthe United States in terms of lung diseases