基于多因素模糊聚类的底板突水危险性预测研究-地质工程专业论文.docxVIP

摘要本文针对济阳煤矿六采区 10 煤层的开采，对采区内 10 煤层底板水文地质特征 及突水危险性进行了详细的分析研究。通过收集采区已有的地质、水文地质勘探资料 ， 分析了采区内 10 煤层顶底板的地质及水文地质条件，研究了 10 煤层底板的岩性构成及其组合特征，分析了影响 10 煤开采的直接、间接充水含水层及含水层之间的水力联系，并得出影响 10 煤层开采的含水层主要是四五灰，徐奥灰主要通过对四五灰的补给影响煤层开采的结论。本文研究了底板四五灰水压分布特证及 10 煤层埋藏规律； 结合六采区瞬变电磁勘探成果进行含水层富水性分析及断层的含导水性分 析；根据 10 煤层底板至四五灰间距及其岩性组合特征计算了有效隔水层厚度；利用断层分维 值采用箱型覆盖法量化了采区的断裂构造指标，合理的评价了采区的断裂构造复杂程 度；综合考虑含水层水压、含水层富水性、隔水层阻水性能、煤层埋深及地质构造复 杂程度五种因素，采用模糊聚类分析法对研究区 10 煤层底板突水危险性进行了预测， 并对研究区进行了突水危险性分区。对采区内的李家断层及其分支断层、DF3 及 DF5 含导水断层采用《煤矿防治水规定》中断层煤柱的留设、考虑采动矿压作用的煤柱留 设及通过 RFPA 数值模拟得到煤柱留设宽度三种方法分别进行了研究，确定了合理的 断层煤柱留设尺寸。关键词：四五灰；徐奥灰；断层分维值；模糊聚类分析；突水危险性；数值模拟ABSTRACTIn view of No.10 seam’s mining in the sixth section of Jiya ng coal mine, this paper made a detailed analysis and study of the hydrogeological character ist ics and water invasion danger of No.10 coal seam floor. By the approaches of collect ing the previous geology and hydrogeology exploration data of the section , this paper analyzed the geological and hydrogeologica l conditions of No.10 coal seam roof and floor, made a study of the lithologicalcharacters and the combined features of No.10 coal seam floor, analyzed the direct 、indirectdischarge aquifers and hydraulic connect ion among these aquifers, and drew conclusions that limestone aquifer IVV was the ma in discharge aquifer that threatened N0.10 seam mining, limestone aquifer XuO had an effect on seam mining by recharging the aquifer IVV. This paper dealed with the head pressure’s distributive character ist ics of limestone aquifer IVV and the buria ldept h of No.10 coal seam; analyzed the water abundance and conduct ivity of the aquifers and the faults using the transient elect roma gnet ic exploration achievements; modified the aquiclude thick ness according to the pitch and lithological associa tion from No.10 seam floor to limestone aquifer IVV; quantized the struct ure indexes of the section adopting box- cover ing met hod using fractal dimension value of the faults, and rationa lly evaluated th