断层及滑动构造复合构造区煤层顶板含水层渗流特征及突水危险性分析

 断层及褶皱的存在乃是导致煤矿突水的最重要的因素。为了研究均存在断层及滑动构造的华北型煤田的直接充水含水层的渗流特征，以平煤集团梨园矿宁庄矿井为例，应用有限差分软件MODFLOW，在空间离散、应力期确定、源汇项嵌入处理的基础上，对同时存在断层及滑动构造的内部边界进行了WALL的处理，建立煤层顶板砂岩含水层渗流场模型，并预测了第5，10年后的渗流场的变化规律。研究结果表明，认为在平煤宁庄矿井四7煤底板含水层的水位仍然保持较高的水平，尤其当WN方向开拓经过滑动构造时，突水的危险性仍然较大。

SEEPAGE CHARACTERS OF ROOF AQUIFERS IN FAULTS AND SLIDING STRUCTURE AND RISK ANALYSIS OF WATER INRUSH

Faults and folds are the key factors causing water inrush in mine. In order to study the seepage characteristics of direct water falling aquifer existing faults and sliding structure，roof aquifers of coal seam No.47 are simulated using finite difference software，MODFLOW，based on the analysis of hydrogeological conditions in Ningzhuang coalmine. Seepage fields of roofs of coal seam No.47 from 2003 to 2006 are simulated through spatial dispersing，stress field determining，wall treat of faults and input of sources and sink items. Then，aquifer model is established. Finally，seepage field laws after 5 and 10 years later are presented. It is shown that the water level of roof aquifer is higher，while in the place of sliding structure in mining，the water inrush risk is still high.