Xu, Chao; Wang, Kai; Li, Xiaomin; Yuan, Liang; Zhao, Chunyu - 2022
China's coal resources are being mined gradually deeper. Compared with the shallow part, the content and the emission of gas are significantly increased in the deep coal seam. In the mining of the highly-gassy coal seam, strengthening gas drainage in the goaf and fissure zone can improve the...