1) high undercover coal mining
大采高卧底煤
2) floor coal
卧底煤
1.
Digging overall height floor coal at one times at about 3.0 m seam face with single hydraulic prop;
3.0m左右煤层采用单体液压支柱支护卧底煤一次采全高
3) high bottom cutting height
底层大采高
1.
of the fully-mechanized sub-level caving full-seam mining with high bottom cutting height for the 20 m very thick and medium hard seam have been studied by 1∶30 physical simulation.
研究结果表明:(1)底层大采高综放全厚开采20m特厚中硬煤层,在技术上是可行的。
4) extract sublayer coal
底煤复采
5) high seam caving mining
大采高放顶煤开采
补充资料：卧底
1.方言。埋伏下来做内应。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条