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
大断面回采巷道
large section mining gateway
放顶煤采煤法
Longwall Mining with Sublevel Caving
跨采巷道
roadway under overhead mining
综采巷道
Comprehensive mining roadway
综放回采巷道
Mining Roadway in Fully Mechanized Caving Face
mining roadway for fully mechanized sublevel caving face
大跨度全煤巷道
long-span full coal drift
半截深采煤
mining technic of half well