大柳塔矿活鸡兔井12煤下分层放顶煤工作面放煤效果研究
高士岗
Analysis on the effect of top-coal caving face of coal seam 12 on the lower slice in Huojitu mine
煤炭工程 . 2020, (10): 56 -60 .  DOI: 10.11799/ce202010012