煤炭科学研究总院北京开采研究所
Beijing Research Institute for Coal Mining
central mining research institute
煤炭资源开采
exploitation of coal resources
中国矿业大学煤炭资源与安全开采国家重点实验室
State Key Laboratory of Coal Resources and Safe Mining
China University of Minng Technology
采煤采气一体化
Integrated Coal Mining and Gas Extraction
长壁综采放顶煤采煤方法
longwall fully mechanized overhead caving coal mining
放顶煤采煤法
Longwall Mining with Sublevel Caving
煤炭采空区
coal mining worked-out area