我国煤矿中,回采工作面两端的区段巷道,总长度要达到几百万米。长期以来一直沿用保留煤柱的方法维护。用煤柱维护区段巷道的煤炭损失量一般要占全矿煤损总量的40％左右。区段巷道的开掘、准备和维修费用要占全矿开发、准备和维修费用总和的50％左右。因此,研究区段间不留煤柱,实现无煤柱护巷,对提高矿井煤炭回采率,降低巷道掘进率和吨 In our country’s coal mines, the total length of sections of tunnels at both ends of the mining face reaches several million meters. It has long been used to maintain pillars maintenance methods. Maintaining the coal roadway with coal pillar coal loss generally accounts for about 40% of the total coal loss. The excavation, preparation and maintenance costs of section tunnels account for about 50% of the sum of the total mine development, preparation and maintenance costs. Therefore, the study section does not leave pillars to achieve non-coal pillar protection of the road, to improve the recovery rate of coal mines, reducing roadway driving rates and tons