侏罗系煤田顶板砂岩含水层井下疏降水孔群优化布置

Optimized layout of underground dewatering and depressuring holes group in sandstone aquifer on the roof of Jurassic system coalfield

以地下水渗流方程和空间点源理论为基础,优化工作面涌水量时空动态预计方法,建立疏降水孔群优化布置数学模型,以鸳鸯湖矿区麦垛山煤矿为例,对该矿130602工作面顶板砂岩含水层疏降水孔群进行优化布置、控制疏放钻孔放水顺序及疏放水有效性的反演计算等,实现了将该工作面影响范围内的直接充水含水层水头高度降至接近含水层底板,总钻孔工程量比原设计减少15.6%,且疏降水具有明显的时效性,缩短矿井安全生产等待时间。

Based on underground water seepage equation and spatial point source theory,water inflow spatiotemporal dynamic prediction method was optimized,mathematical model of optimized layout of underground dewatering and depressuring holes group was established.Taking a coal mine of Yuanyanghu mining area for example,the layout of dewatering and depressuring holes group in sandstone aquifer on the roof of 130602 working face were optimized,the water drainage order of the holes group was controlled and the effectiveness of water drainage was back calculated,which realized decreasing the height of water head of direct water-filling aquifer down to aquifer floor,the total engineering quantity was reduced by 15.6%,the dewatering and depressuring process had obvious timeliness and shortened the coal mine safety production waiting time.