侏罗系煤田顶板砂岩含水层井下疏降水孔群优化布置
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摘要
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.
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.
引文
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[4]杨建,梁向阳,丁湘.蒙陕接壤区深埋煤层开发过程中矿井涌水量变化特征[J].煤田地质与勘探,2017(4)
[5]闫建华,王朝引,丁湘.鄂尔多斯侏罗系煤田水文地质特征及防治水对策[J].建井技术,2013(6)
[6]靳德武.我国煤矿水害防治技术新进展及其方法论思考[J].煤炭科学技术,2017(5)
[7]王英,樊永贤,罗一夫.崔家沟煤矿矿井充水因素分析[J].西安科技大学学报,2012(6)
[8]王苏健,侯恩科,冯洁等.黄陵一号煤矿2号煤层顶板涌(突)水危险性分区预测[J].西安科技大学学报,2012(2)
[9]虎维岳.浅埋煤层回采中顶板含水层涌水量的时空动态预测技术[J].煤田地质与勘探,2016(5)
[10]王彩会.深基坑降水工程优化设计及渗流场与应力场耦合分析[D].河海大学,2001
[11]郑纲,何渊.深埋矿井超大工作面顶板砂岩含水层涌水量预测方法[J].煤矿安全,2015(S1)
[12]姬永红,尹传金.深基坑工程中井点布置的优化设计[J].西部探矿工程,2016(5)
[13]薛禹群,吴吉春.地下水动力学(第三版)[M].北京:地质出版社,2010
[14]赵开泉.顶板砂岩含水层下采煤技术浅析[J].煤矿开采,1991(1)
[15]陈实.倾斜钻孔井流计算方法及其在井下疏放水工程中的应用[D].煤炭科学研究总院,2014