Open AccessExperimental Study on Directional Long Hole Gas Drainage in Thick Coal Seam Roof
Author(s) -
Ran Wang,
Quanmin Jia
Publication year - 2020
Language(s) - English
Resource type - Conference proceedings
DOI - 10.2991/aer.k.201203.003
Subject(s) - roof , drainage , coal , coal mining , petroleum engineering , mining engineering , environmental science , geology , civil engineering , engineering , waste management , ecology , biology
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