大跨度全煤巷道
long-span full coal drift
巷柱式放顶煤
roadway caving mining
Gateway and pillar top coal caving
巷柱－综采放顶煤
combin gateway and pillar with fully mechanized to
长壁综采放顶煤采煤方法
longwall fully mechanized overhead caving coal mining
大采高综采放顶煤技术
fully mechanized high cutting and top coal caving mining technology
大倾角综采放顶煤
the steep-grade angle and top coal mining
顶煤放出率
top coals′ recovery ratio
短长壁综采放顶煤
shorter long-wall full-mechanized caving mining