坚硬顶板下近距离煤层群切顶卸压技术研究
王帅, 赵国贞, 刘超
Study on pressure relief and overhanging elimination technology of close distance coal seam group under hard roof
煤炭工程 . 2022, (9): 75 -80 .  DOI: 10.11799/ce202209014