预留泄水孔法超前解决老空水害威胁技术应用

Technology application of reserved drainage hole method to solve the water damage threat advancedly in old goaf

老空积水是威胁煤矿安全生产的主要水害之一,老空积水就像一个地下水库,若发生突水,短时间内大量积水、煤泥涌出,破坏性极强,会造成经济损失,甚至人员伤亡。为了解除老空水害威胁,需要采用钻探手段进行疏放,钻机运输、开孔、测斜、放水、排水等工序需要大量人力、物力和财力,且严重制约工作面生产衔接。为了能够减少成本且保证生产衔接,提出超前预留泄水孔法,利用巷道空间关系,超前施工泄水钻孔疏放老空水。结果表明,预留泄水孔法能够有效避免或减少工作面采后形成积水空间,最大限度的解除和降低了老空水害影响。

Water accumulation in old goaf is one of the main water damage which threaten the safety of coal mine production.Water accumulation in old goaf is like an underground reservoir.If water outburst occurs,a large amount of water and coal mud will gush out in a short time,which is extremely destructive and will cause economic losses and even casualties.In order to relieve the threat of old goaf water damage,it is necessary to use drilling methods for drainage.Drilling rig transportation,opening,inclinometer,drainage and other processes require a lot of manpower,material and financial resources,and seriously restrict the production connection of working face.In order to reduce the cost and ensure the production connection,the advanced reserved drainage hole method is proposed,and the leakage hole is constructed in advance to drain the old goaf water by using the spatial relationship of the roadway.The results show that the reserved drainage hole method can effectively avoid or reduce the formation of water accumulation space after mining in the working face,and minimize and reduce the influence of old goaf water damage.