Results 291 to 300 of about 335,851 (308)

Early Coal mines

Notes and Queries, 1930
  +4 more sources

Coal and coal mine drainage.

Journal - Water Pollution Control Federation, 1972
J F, Boyer, V E, Gleason
openaire   +1 more source

Hydraulic coal mining

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1987
openaire   +1 more source

Pennsylvania Coal Mining

Scientific American, 1895
openaire   +1 more source

Coal Mine Accidents

Scientific American, 1908
openaire   +1 more source

Numerical simulation on the risk of roof water inrush in Wuyang Coal Mine

International Journal of Mining Science and Technology, 2012
exaly  

Coal-Mining

openaire   +1 more source

Coal Mine Surveying

Australian Surveyor, 1936
openaire   +1 more source

COAL MINING METHODS

2016
openaire   +1 more source

Coal Mine Structures

1985
openaire   +1 more source