古交矿区下组煤奥灰突水涌水量预测与分析

Prediction and Analysis of Ordovician Limestone Water Inrush Water Inflow in Gujiao Diggings Lower Group Coal

通过对西山煤田古交矿区下组煤奥灰O2f与O2s富水性分析,结合矿区不同含水层充水通道与突水形式分析,认为在古交矿区奥灰O2f2和O2s2+3含水层段富水强度不同,且与下组煤距离不同,对下组煤带压开采所起的充水作用也不同,其中O2f2可能形成下组煤底鼓突水,O2s2+3形成底鼓突水可能性小,主要是集中通道导水。古交矿区开采8号煤O2f预测最大突水量为234 m3/h,O2s含水层则需重视断层、岩溶陷落柱导水性的探查,同时对可能导水的钻孔加强监测。

Analyzes the watery of Ordovician limestone O2 f and O2 s in Gujiao diggings lower group coal,combining with the analysis of different aquifer water channels and water inrush form,considers that water intensity of Ordovician limestone O2f^2 and O2s^2 ＋ 3aquifer sections in Gujiao diggings are different,and the distance from the lower coal group are different. So the water filling function of lower coal group with mining above confined aquifer is also different. Among them,O2f^2 may form lower coal group heaving floor water inrush,and the possibility of O2s^2 ＋ 3forming heaving floor water inrush is small. It is mainly centralized channel water. It predicts that the maximum water inrush of mining No. 8 coal seam O2 f in Gujiao diggings is 234 m^3/ h,O2 s aquifer should be paid attention to search the fault,water conductivity of karst collapse column,at the same time to strengthen monitoring to drilling of might guide water.