采动影响下谢桥煤矿地下水动态变化特征及模拟研究

发布时间：2018-07-05 13:40

本文选题：煤矿开采 + 谢桥煤矿　；参考：《合肥工业大学》2016年硕士论文

【摘要】：煤矿开采对地下水的影响是一个动态且持续变化的过程。矿山开采容易引起采动破坏、矿井排水和含水层疏干等现象,使地下水原有的补径排平衡状态被破坏,地下水循环关系发生了变化,地下水系统变得目趋复杂。煤矿开采不仅对地下水水量、水温产生影响,也会对地下水水质产生污染。所以对开采条件下矿区地下水动态变化的研究刻不容缓,这将有利于矿井安全生产和地下水资源的合理利用。本文以谢桥矿区为主要研究对象,在收集分析区域地质、水文地质资料的基础上,采用常规分析法、主成分和分类主成分法、GIS空间插值等方法从空间和时间上分析研究区地下水质的分布规律和变化特征。运用Surfer和Origin等工具从时空上查明了地下水位的动态变化情况,并结合含水层水温变化加以分析。综合分析研究区水文地质条件,建立了本区的地下水流GMS数值模型,并对该区未来地下水进行动态模拟。结果表明：煤矿开采对地下水的影响主要表现在煤系和灰岩含水层,其中下部煤系水与灰岩水存在水力联系,煤系水质和水温易受到灰岩水的混合影响,灰岩水因陷落柱和采煤影响促使自下而上补给；从2011年至2015年,新生界中含含水层水位变化幅度较小,灰岩水水位总体呈现下降趋势,2013年降至最低,矿区东西井区域之间出现大范闱明显的降落漏斗,地下水流自南向北流动；数值模拟结果表明由于采煤影响和地下水开采时间较长,地下水降落漏斗范围和深度稍微扩大,并将在很长一段时间将继续存在。
[Abstract]:The influence of coal mining on groundwater is a dynamic and continuous process. Mining is easy to cause mining damage, mine drainage and aquifer drying phenomena, so that the original equilibrium state of groundwater supply and drainage has been destroyed, the circulation relationship of groundwater has changed, and the groundwater system has become more and more complicated. Coal mining not only affects groundwater quantity and water temperature, but also pollutes groundwater quality. Therefore, it is urgent to study the dynamic change of underground water in mining area, which will be beneficial to mine safety production and rational utilization of groundwater resources. This paper takes Xieqiao mining area as the main research object, on the basis of collecting and analyzing the regional geology and hydrogeological data, adopts the conventional analysis method. The principal component and classification principal component method and GIS spatial interpolation are used to analyze the distribution and variation characteristics of underground water quality in the study area in space and time. By using Surfer and Origin tools, the dynamic change of groundwater level is found out in time and space, and the variation of aquifer water temperature is analyzed. Based on the comprehensive analysis of hydrogeological conditions in the study area, the GMS numerical model of groundwater flow in this area is established, and the dynamic simulation of groundwater in the future in this area is carried out. The results show that the influence of coal mining on groundwater is mainly manifested in coal measures and limestone aquifers, in which there is a hydraulic relationship between the lower coal measure water and limestone water, and the coal measure water quality and water temperature are easily affected by the mixed influence of limestone water. Limestone water is recharged from bottom to top because of collapse column and coal mining. From 2011 to 2015, the change of water level of aquifer in Cenozoic is relatively small, and the water level of limestone water in general shows a downward trend, and the water level of limestone decreases to the lowest in 2013. Between the east and west well areas of mining area, there is obvious drop funnel in Dafan Wei area, and groundwater flows from south to north. The numerical simulation results show that because of the influence of coal mining and the long time of groundwater exploitation, the scope and depth of groundwater drop funnel is slightly enlarged. And will continue to exist for a long time.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P641.4

【相似文献】