露天煤矿开采后地下水疏干范围研究
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摘要
将梁家碛露天煤矿开采后对地下水的影响概化为奥陶系中统灰岩岩溶裂隙含水层,石炭—二叠系碎屑岩裂隙含水层,第三系、第四系松散孔隙含水层,研究梁家碛露天煤矿开采后地下水疏干范围。其中,首采区、二采区奥陶系岩溶水突水系数小于受构造破坏地段突水系数的临界值(0.06 MPa/m),不会造成突水事故,也不会破坏该层含水层。采用塞罗瓦特科公式和无观测孔完整井抽水状态下的影响半径公式分别讨论了煤炭开采后对第三系、第四系松散孔隙含水层,石炭—二叠系碎屑岩裂隙含水层地下水的疏干范围,结果表明,其影响半径分别为5 864.12、4 895.50 m。
The groundwater drainage range after Liangjiaqi opencast coal mining was researched via generalizing the effects of Liangjiaqi opencast coal mining on groundwater to middle Ordovician limestone karstic fissure water aquifer,the Carboniferous Permian clastic rock fissure water aquifer,third lines and the Quaternary loose pore aquifers.Among them,the inrush coefficient of Ordovician karstic water in first and second mining area were both less than the critical value(0.06 MPa/m),the structural damaged sections of water inrush coefficient,which would not cause the water inrush accident,and damage the aquifer.Using the Sello Watt C formula and the effect radius formula under the conditions of complete well pumping without observation hole the groundwater drainage area of the Quaternary loose pore aquifers,Carboniferous-Permian clastic rock fissure aquifer and the coal mining on third lines were discussed.The results show that the influence of radius respectively is 5 864.12 and 4 895.50 m respectively.
The groundwater drainage range after Liangjiaqi opencast coal mining was researched via generalizing the effects of Liangjiaqi opencast coal mining on groundwater to middle Ordovician limestone karstic fissure water aquifer,the Carboniferous Permian clastic rock fissure water aquifer,third lines and the Quaternary loose pore aquifers.Among them,the inrush coefficient of Ordovician karstic water in first and second mining area were both less than the critical value(0.06 MPa/m),the structural damaged sections of water inrush coefficient,which would not cause the water inrush accident,and damage the aquifer.Using the Sello Watt C formula and the effect radius formula under the conditions of complete well pumping without observation hole the groundwater drainage area of the Quaternary loose pore aquifers,Carboniferous-Permian clastic rock fissure aquifer and the coal mining on third lines were discussed.The results show that the influence of radius respectively is 5 864.12 and 4 895.50 m respectively.
引文
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[4]蒋辉,郭训武.专门水文地质学[M].北京:地质出版社,2007.
[5]成春奇,郑高升,魏广庆.基于单孔稳定流抽水试验观测值的非稳定流求参方法[J].煤田地质与勘探,2005(增刊1):98-100.
[6]曹运江,廖坤炎,冯少真,等.贵州谊源煤矿矿山环境影响耦合分区[J].煤田地质与勘探,2011(3):33-37.
[7]廖资生,林学钰,石钦周,等.黄河下游悬河段傍河开采地下水的试验研究——以郑州市区黄河滩地为例[J].工程勘察,2004(3):20-27.
[8]薛禹群.地下水动力学[M].2版.北京:地质出版社,2005.