三图双预测在横沟井田顶板突水评价中的应用

Application of three figures-double prediction methodin roof water outburst assessment in Henggou field

煤层顶板涌(突)水事故多发,给矿井安全生产造成极大威胁。以陕西吴堡矿区横沟井田为例,在分析矿井水文地质特征的基础上,采用“三图-双预测法”,从煤层顶板充水含水层富水性和冒裂安全性两方面进行综合分析,对S组主采煤层进行顶板突水危险性评价预测和分区。评价结果表明,矿井涌(突)水较危险区和次危险区分布于井田南部、东南部及中部部分区域,井田中部及南部零星分布有小范围的危险区;相对安全区和较安全区主要位于井田北部及中部部分区域,其余地区为过渡区。

Coal seam roof water inflow accidents occur frequently,which poses a great threat to mine safety production.Taking Henggou field in Wubao Mining Area of Shaanxi Province as an example,on the basis of analyzing the hydrogeological characteristics of the mine,the'three figures-double prediction method'was used to comprehensively analyze the water abundance and cracking safety of the water-filled aquifer of the coal seam roof,and carry out the roof water outburst risk assessment and zoning of the main coal seam of S group.The evaluation results showed that the more dangerous and sub-dangerous areas of mine water inflow were distributed in the southern,southeastern and central parts of the mine field,and there were small-scale dangerous areas in the central and southern parts of the mine field.The relatively safe area and the relatively safe area were mainly located in the northern and central parts of the minefield,and the remaining areas were transitional areas.