实现倾斜方向连续卸压的留煤柱开采保护层技术
李春阁,杨长德,王鹏,等
Research on coal pillar layout of inclined successive and sufficient pressure-relief in protected coal seam and recovery
煤炭工程 . 2016, (7): 4 -7 .  DOI: 10.11799/ce201607002