榆神府煤炭开采区地下水动态特征研究

发布时间：2018-04-15 23:21

本文选题：煤炭开采 + 地下水　；参考：《西安科技大学》2015年硕士论文

【摘要】：榆神府地区地处陕西省北部,水资源匮乏,属于干旱、半干旱大陆性季风气候,是全国矿产资源富饶的地区之一,煤炭开采成为当地主要的经济支柱产业。在大规模的煤炭开采过程中,使得地下水的水文地质环境遭到破坏,地质、水文结构发生改变,从而发生河流干枯、地质塌陷等灾害。因此,对榆神府煤炭开采区的地下水动态特征进行研究,查明煤炭开采在不同阶段对地下水的影响规律,从而对该地区未来地下水动态变化的预测提供了科学依据。本论文以榆神府煤炭开采区为研究对象,统计煤炭开采区地表径流量、泉流量、矿井水位变化的数据和植被生态与水环境的联系,分析地下水水位大幅下降与煤炭开采有直接关系。对榆神府矿区排水量统计,分析煤矿排水对地下水动态影响是第一因素。再从煤炭开采前后地质、地层、矿井涌水量的变化,深层分析煤炭开采对地下水动态影响,而煤炭开采会形成地下水降落漏斗区,采空区形成矿井水被疏排,引起地下水位大幅下降。随着矿井停止采矿矿井疏排水也已经结束,煤炭开采期间的平衡状态也已不复存在,地下水运动又形成了新的动态流场。以锦界矿区为例,从中长期的煤炭开采对地下水动态变化的影响规律角度研究,运用地下水数值模拟软件,模拟该地区地下水水位变化,预测锦界矿区中长期地下水水位变化情况。矿区地下水水位每年平均20m左右的降幅,至2048年时地下水流场形成新的地下水流场。
[Abstract]:Yushenfu region is located in the northern part of Shaanxi Province, which is short of water resources and belongs to arid and semi-arid continental monsoon climate. It is one of the rich mineral resources areas in China, and coal mining has become the main pillar industry of local economy.In the process of large-scale coal mining, the hydrogeological environment of groundwater is destroyed and the geological and hydrological structure is changed.Therefore, the dynamic characteristics of groundwater in Yushenfu coal mining area are studied to find out the influence of coal mining on groundwater in different stages, thus providing a scientific basis for the prediction of groundwater dynamic change in the future in this area.This paper takes the Yushenfu coal mining area as the research object, statistics the surface runoff, the spring discharge, the mine water level change data and the vegetation ecology and the water environment relations,It is analyzed that the large drop of groundwater level is directly related to coal mining.The first factor is to analyze the influence of coal mine drainage on groundwater dynamic.Then from the change of geology, strata and mine water discharge before and after coal mining, the paper deeply analyzes the influence of coal mining on groundwater dynamics, and coal mining will form underground water drop funnel area and goaf area to form mine water drainage.Caused a sharp drop in the groundwater table.With the stoppage of mine drainage, the equilibrium state of coal mining has ceased to exist, and the movement of groundwater has formed a new dynamic flow field.Taking Jinjie mining area as an example, from the point of view of the influence of coal mining on groundwater dynamic change in the medium and long term, the groundwater level change in this area is simulated by using the groundwater numerical simulation software.The medium and long term groundwater level variation in Jinjie mining area is predicted.The groundwater level in mining area decreases by about 20m per year, and a new groundwater field is formed by 2048.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P641.461

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