基于MODFLOW对敏东二矿矿井涌水量预测研究

发布时间：2018-04-10 15:01

本文选题：涌水量 + 伊敏组　；参考：《河北工程大学》2015年硕士论文

【摘要】：研究区位于伊敏河东区探矿权范围以内的北部,井田面积约116.5km2。本文以水文地质学、地下水动力学理论为指导,结合内蒙古海拉尔区域地质资料,通过抽水试验、水质分析与沉积分析等手段,对伊敏河东煤田含水层与隔水层划分及其空间展布格局与水文地质条件及富水性特征进行研究,并对矿井涌水量进行了预测。本文将研究区域划分为两个主要的含水层组:第四系孔隙含水层和白垩系伊敏组煤系地层含水层,其中白垩系伊敏组煤系地层含水层又进一步划分为15煤层上部含水层、15煤层间含水层、16煤层上部含水层、16煤层间含水层。各含水层富水性大部分较强,上部隔水层不均匀,隔水效果较差。其中白垩系伊敏组煤系地层含水层中的15煤层含水层为本次研究的重点含水层,其上覆的14煤层隔水层和第四系隔水层分布不均匀,存在水头差,有天窗和边缘补给;其下伏的15煤层隔水层,分布均匀,富水性弱,为良好的隔水层。论文在水文地质条件分析成果的基础上,概化出敏东二矿的水文地质概念模型,建立出与水文地质概念模型相适应的数学模型,最后用Visual Modflow进行数值模拟,计算出第一水平矿井正常涌水量为1943 m3/h,最大涌水量为2137 m3/h;先期开采地段正常涌水量为1757m3/h,最大涌水量为1933 m3/h。根据数值模拟结果对矿井开采疏干排水方案做出了建议。
[Abstract]:The study area is located in the northern part of Yimin Hedong District, with an area of 116.5 km ~ 2.Guided by the theory of hydrogeology and groundwater dynamics, combined with the regional geological data of Hailar, Inner Mongolia, the paper adopts pumping test, water quality analysis and sediment analysis, etc.This paper studies the division of aquifer and aquifer, spatial distribution pattern, hydrogeological conditions and water-rich characteristics in the east coal field of Yimin River, and forecasts the mine water discharge.In this paper, the study area is divided into two main aquifer groups: Quaternary pore aquifer and Cretaceous Yimin coal series aquifer.The coal measure aquifer of the Cretaceous Yimin formation is further divided into 15 coal seam upper aquifer, 15 coal seam aquifer, 16 coal seam upper aquifer and 16 coal seam aquifer.Most of the aquifers are rich in water, the upper layer is not uniform, and the effect of water insulation is poor.The 15 coal bed aquifer in the coal measure aquifer of the Cretaceous Yimin formation is the key aquifer in this study. The 14 coal seams and the Quaternary water-isolated strata are unevenly distributed, and there are water head difference, skylight and marginal recharge.Its underlying 15 coal seams have uniform distribution and low water content, which is a good waterproof layer.Based on the results of hydrogeological condition analysis, this paper generalizes the conceptual model of hydrogeology in Mindong No.2 Mine, and establishes a mathematical model suitable to the conceptual model of Hydrogeology. Finally, the numerical simulation is carried out with Visual Modflow.It is calculated that the normal discharge of the first level mine is 1943 m3 / h, the maximum discharge is 2137 m3 / h, and the normal inflow of the first mining area is 1 757 m3 / h, the maximum discharge is 1933 m3 / h.According to the results of numerical simulation, the drainage scheme of mine mining is suggested.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P641.41

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