基于Visual Modflow模型的大型储煤槽仓边坡防渗分析  

Water seepage prevention analysis of large coal storage tank slope based on Visual Modflow model

作　　者：吕远强[1,2] 孙国凯 赵金刚 LV Yuan-qiang;SUN Guo-kai;ZHAO Jin-gang(Geological Engineering of Geological Engineering and Surveying Institute,Chang’an University,Xi’an 710054,China;China Coal Xi’an Design Engineering Co. ,Ltd. ,Xi’an 710054,China)

机构地区：[1]长安大学地质工程与测绘学院,陕西西安710054 [2]中煤西安设计工程有限责任公司,陕西西安710054

出　　处：《西安科技大学学报》2020年第4期665-671,共7页Journal of Xi’an University of Science and Technology

摘　　要：为了对朱盖塔大型储煤槽仓喷护边坡在建设过程中出现的多处渗水问题进行防治,避免冬季冰溜,夏季解冻,形成冻融循环威胁槽仓边坡工程安全,结合槽仓结构特点和水文地质调查测绘结果,采用疏降水方案,利用Visual Modflow渗流分析软件,通过边界条件和地下水流系统的概化,建立槽仓影响区水文地质渗流数值模型,对比实际调查所得地下水等值线及模拟结果,识别和验证建立模型的可靠性。研究认为利用验证后的数值模型预测槽仓边坡疏降水的涌水量为275 m^3/d,将抽水孔等效为渗水井,借助渗井计算公式,最终得出需要30个渗水井来满足槽仓边坡疏降水的设计方案。所得疏降水方案实施后效果良好,保证了建成槽仓的正常运营和槽仓边坡支护结构的安全,为类似工程渗水防治提供了理论依据。The research attempts to prevent and control the water seepage in many places during the construction of the shotcrete slope of the large coal storage bunker in Zhugaita,avoid the ice slide in winter and thaw in summer,or to form the freeze-thaw cycle to threaten the engineering safety of the bunker slope.Based on the analysis of the structural characteristics and hydrogeological conditions of the tank,the hydrogeological seepage numerical model of the affected area of the trench silos is established by using the drainage scheme,the Visual Modflow seepage analysis software,the boundary conditions and the generalization of the groundwater flow system;comparing the simulated groundwater isoline with the actual isoline,the reliability of the model is identified and verified.By using the verified numerical model,the inflow of dredging precipitation in the tank slope is predicted to be 275 m^3/d;when the pumping hole is equivalent to the filter well,with the aid of the calculation formula of the filter well,thirty filter wells are needed to satisfy the dredging precipitation of tank slope.The dewatering scheme works well in that it ensures the normal operation of the built tank and the safety of the slope support structure of the tank,which provides a guiding significance for the seepage prevention and control of similar projects in this area.

关 键 词：大型储煤槽仓边坡 防渗 水文地质渗流数值模型 渗水井 

分 类 号：P641[天文地球—地质矿产勘探]