老空水下巷道掘进综合防治水技术应用研究

Application study on water control technique of roadway tunnelling under gob water

针对老空水下巷道掘进的突水问题,以宁武煤田某矿回风斜井为例,通过放水孔疏放上部采空区积水,结合理论分析、数值模拟分析计算出回风斜井防水煤、岩柱留设的安全长度,同时通过加强支护、实时监测等手段提高巷道抗压能力,保障了巷道的长期使用。结果表明,老空水下巷道掘进综合防治水技术安全可行,为其他矿区采空区水下巷道掘进提供了依据。

For the water inrush problem of roadway tunnelling under gob water,with the wind circling tilting of amine in Ningwu Coal field well of as example.According to the hole to drain the water of upper mined area,combined with theoretical analysis,numerical simulation analysis to calculate the return air shaft waterproof coal and the safety length of the rock pillars.At the same time by strengthening support,real-time monitoring and other means to improve roadway compression capacity,to protect the long-term use of the roadway.The results show that the comprehensive prevention and control of water in roadway which under the old and empty water is safe and feasible,which provides the basis for the excavation of underground roadway in goaf of other mining areas.