梧桐庄矿多含水层底板突水危险性评价

Evaluation of Floor Water-burst Danger over Multi-aquifer in Wutongzhuang Colliery

以峰峰梧桐庄矿2号煤层(大煤)为例,在详细分析梧桐庄井田的基础地质、水文地质、构造地质条件和煤层底板突水规律的基础上,确定了8个影响煤层底板突水的主控因素,应用ArcGIS数据和空间分析、图形可视化等功能,分别建立了水压、含水层厚度、有效等效隔水层厚度、断层分布、断层规模指数、构造交点和端点、陷落柱影响带、褶皱影响带共8个专题图。运用层次分析法(AHP)量化了各个主控因素对煤层底板突水危险性的权重,建立了矿井底板突水脆弱性水文地质评价模型。针对梧桐庄矿底板拥有4个灰岩含水层的特点,分别对其进行脆弱性分区,并提出相应的防治水措施,是"脆弱性指数法"在多含水层底板矿井的首次成功应用。

Taking 2nd coal-seam of Fengfeng Wutongzhuang Colliery as example,this paper obtained 8 main factors influencing floor water-burst by analyzing base geology,hydrogeology,tectonic geology and floor water-burst rules Data and space analysis and graphic visualization functions of ArcGIS were applied to setting up 8 thematic maps including water pressure,aquifer thickness,effective aquiclude thickness,fault distribution,fault scale index,tectonic intersection and endpoint,influence range of collapse column and drape Weight of every factor was obtained by AHP and mine floor water-burst vulnerability evaluation model was set up This model was used successfully in floor water-burst mine by applying vulnerability index method to zoning 4 limestone aquifers and according water prevention measures were put forward.