基于GMS三维地下水模型的矿井涌水量预测研究

发布时间：2018-03-28 10:26

  本文选题：富水性评价　切入点：地下水数值模拟　出处：《中国地质大学(北京)》2017年硕士论文

【摘要】：矿井涌水是煤矿开懫过程中最危险的地质问题之一,严重威胁到煤矿的安全生产,因此有必要预先掌握煤层开采所造成的矿井涌水情况,以便提前做好防范措施。本文以山西同富新煤矿作为研究对象,在分析矿区及其周边区域地质及水文地质条件的基础上,评价2号煤层直接充水含水层的富水性,并利用GMS软件建立研究区地下水三维数值模型,预测2号煤层开采所造成的矿井涌水量,并根据预测结果提出相应的防水对策。本文主要研究成果有:(1)分析矿区及其周边区域的水文地质条件,包括含水层和隔水层特征、地下水径排补条件、矿井充水因素等。下石盒子组砂岩裂隙承压含水层是2号煤层的直接充水含水层,其对矿井充水的影响最大。(2)基于GIS多源信息融合方法和层次分析法对2号煤层直接充水含水层的富水性进行评价,确定主控因素及其权重,建立层次结构模型和判断矩阵,最后得出矿区内2号煤层充水层的富水性指数,并根据富水性指数进行分区。由评价结果可知2号煤层工作面顶板含水层的富水性较强,在开采过程中很可能会造成突水,有必要对矿井的涌水量进行预测。(3)基于GMS软件建立研究区地下水数值模型,确定边界条件、源汇项以及水文地质参数,并对模型进行校核。根据数值模型预测了矿井未来五年内的涌水情况,分析了五年来矿井涌水量以及地下水位的变化规律,得到矿井稳定涌水量。(4)运用“大井法”计算了矿井的涌水量,将计算结果与模型计算值进行对比分析,验证了模拟结果的可靠性。(5)根据矿井涌水量预测结果提出防水对策。
[Abstract]:Mine water gushing is one of the most dangerous geological problems in the process of coal mine opening, which seriously threatens the safety of coal mine production. Therefore, it is necessary to grasp the mine water gushing situation caused by coal seam mining in advance. This paper takes Tongfuxin Coal Mine of Shanxi Province as the research object and evaluates the water-rich water content of the water-filled aquifer of No. 2 Coal seam on the basis of analyzing the geological and hydrogeological conditions of the mining area and its surrounding areas. The 3D numerical model of groundwater in the study area is established by using GMS software, and the mine water discharge caused by the mining of No. 2 coal seam is forecasted. According to the forecast results, the corresponding waterproof countermeasures are put forward. The main research results of this paper are: 1) analyzing the hydrogeological conditions of the mining area and its surrounding areas, including the characteristics of the aquifer and the water-separating layer, and the condition of the recharge of the diameter and discharge of the groundwater. The sandstone fissure confined aquifer of Xiashihezi formation is the direct water-filled aquifer of No. 2 coal seam. Based on GIS multi-source information fusion method and analytic hierarchy process (AHP), this paper evaluates the water enrichment of the No. 2 coal seam direct water-filled aquifer, determines the main control factors and their weights, and establishes the hierarchical structure model and judgment matrix. Finally, the water-rich index of the water-filled layer of No. 2 coal seam in the mining area is obtained and divided according to the water-rich index. The evaluation results show that the water-rich aquifer in the roof of No. 2 coal seam face is strong, which may cause water inrush in the mining process. It is necessary to predict the mine water discharge. (3) based on the GMS software, the groundwater numerical model of the study area is established to determine the boundary conditions, source and sink terms and hydrogeological parameters. According to the numerical model, the water inflow in the next five years is forecasted, and the variation law of mine discharge and groundwater level in the past five years is analyzed. The steady water inflow of mine is obtained. (4) the method of "large well" is used to calculate the water inflow of mine, and the calculated result is compared with the calculated value of the model, and the reliability of the simulation result is verified. 5) according to the forecast result of mine water discharge, the waterproof countermeasures are put forward.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P641.461
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本文编号：1675928