钱营孜煤矿W3_(2)33工作面充水因素及涌水量预测分析

Analysis of Water Filling Factors and Water Inflow Prediction in the W3_(2)33 Working Face of Qianyingzi Coal Mine

钱营孜煤矿W3_(2)33工作面内褶曲和断层构造较发育,水文地质条件复杂。针对该矿存在的工作面充水因素多样、涌水量变化复杂的问题,基于矿井地质条件分析了W3_(2)33工作面水文地质特征以及工作面充水的相关因素,采用现场踏勘、理论分析得出了充水水源、新生界松散层、顶底板含水层、断层富水等充水因素对工作面涌水的影响,其中顶底含水层含水性复杂多变,存在含水性较强区域,最大涌水量达68.7 m^(3)/h且大部分涌水发生在工作面揭露的断层附近,该因素为重点监测方向,而其余因素对工作面涌水影响较小。同时采用“大井”法与水文比拟法综合分析了工作面涌水量,得出W3_(2)33工作面顶底板进入工作面最大涌水量为53.3m^(3)/h。

The folds and fault structures in the W3_(2)33 working face of Qianyingzi Coal Mine are well-developed,and the hydrogeological conditions are complex.In view of the existing problems of diverse factors of water filling and complex changes of water inflow in the working face of this mine,based on the geological conditions of the mine,the hydrogeological characteristics of the W3_(2)33 working face and the related factors of water filling in the working face are analyzed.On-site exploration and theoretical analysis are used to obtain the impact of water filling factors such as water source of water filling,loose layer of the Cenozoic era,roof and floor aquifers,and fault rich water on the working face water inflow.Among them,the water content of the roof and floor aquifers is complex and variable,there are areas with relatively strong water content,with a maximum water inflow of 68.7 m^(3)/h,and most of the water inflow occurs near the exposed faults in the working face.This factor is a key monitoring direction,while other factors have a relatively small impact on the water inflow in the working face.At the same time,the"big well"method and hydrological comparison method are used to comprehensively analyze the water inflow of the working face,and it is found that the maximum water inflow from the roof and floor of the W3_(2)33 working face into the working face is 53.3 m^(3)/h.