LU Ping, FANG Liang-cai, TONG Yun-fei, LI Gui-he, ZHANG Gen-fa, DENG Zhong. Relieved gas drainage and comprehensive control in gob of Y-type coal face in the first coal seam mining of deep multi-seams[J]. Journal of Mining & Safety Engineering, 2013, 30(3): 456-462.