首采工作面外圈留巷维护技术研究与应用

Research and Application of Maintenance Technology of Outer Entry Retaining in First Mining Face

通过对深井、高应力矿井外圈巷道维护留巷现场工程实例的研究和应用,在巷道保护煤柱宽度缩小二分之一的条件下,采取合理有效的工程技术措施,实现了回采工作面外圈巷道成功留巷复用,合理减小保护煤柱宽度,提高煤炭回收率,确保留巷复用效果,降低了矿井万吨掘进率。

Based on the research and application of the engineering examples for maintaining retained outer roadway in deep and high-stress mine,under the condition that the width of protected coal pillar of roadway is reduced by half,the reasonable and effective technical measures are adopted to realize the successful reuse of retained roadway in outer circle of mining face.By reducing the width of protected coal pillar reasonably,the recovery rate can be increased and the effective reuse of retained roadway can be ensured.It also reduces the drivage ratio for mining 10,000 ton of coal.