极近距离煤层群下部煤层回采巷道布置及围岩控制技术研究
孙健新, 赵正军
Layout of mining roadways and surrounding rock control technology in the lower coal seam of contiguous coal seams
煤炭工程 . 2025, (8): 16 -23 .  DOI: 10. 11799/ ce202508003