泊江海子矿地下水数值模拟及疏放性评价
发布时间：2019-03-02 19:25
【摘要】：鄂尔多斯盆地赋存丰富的煤炭资源,但受成岩过程及后期构造影响,侏罗系煤层顶板砂岩裂隙-孔隙水分布与赋存具有不均匀性,对回采过程产生一定的威胁。为此,研究其水文地质特征、评价其疏放性及模拟回采过程中渗流场变化特征对矿井水害防治具有一定的指导意义。 本文在查阅国内外相关文献的基础上,以东胜矿区的泊江海子矿为例,系统分析了地质及水文地质条件,重点研究了113101首采面3-1煤层顶板侏罗系中统含水层在疏放下条件下的水量、水位动态变化特征,并建立了水文地质概念模型和孔隙-裂隙三维非稳定流数学模型,经识别和验证后,获得了研究区的水文地质参数。利用上述模型,模拟首采面在回采过程中的侏罗系中统地下水位下降形成疏干漏斗的演化过程,并间接计算了涌水量,经与“大井法”对比发现两种预测结果较为接近。 此外,从含水层地下水位、水量随时间变化角度评价工作面疏放水效果,并采用检验单孔出水量进行验证,同时利用流量变化率及疏放率评价局部疏放效果,可看出显著的疏放水效果减轻了工作面回采时受到的水害威胁的压力,因而具有十分重要的现实意义。
[Abstract]:There are abundant coal resources in Ordos Basin, but under the influence of diagenetic process and late stage structure, the distribution and occurrence of fracture-pore water in Jurassic coal seam roof sandstone are not uniform, which threaten the mining process to a certain extent. Therefore, the study of its hydrogeological characteristics, the evaluation of its sparsity and the change characteristics of seepage field in the process of simulated recovery are of guiding significance to the prevention and control of mine water hazards. Taking Bojiang Haizi Mine in Dongsheng Mining area as an example, the geological and hydrogeological conditions are systematically analyzed on the basis of consulting relevant literatures at home and abroad. The dynamic variation characteristics of water volume and water level in the middle Jurassic aquifer under the condition of sparse setting are studied in this paper, and the hydrogeological conceptual model and the mathematical model of pore-fracture three-dimensional unsteady flow are established. After identification and verification, the hydrogeological parameters of the study area are obtained. Using the above-mentioned model, the evolution process of the dewatering funnel formed by the drop of groundwater level in the middle Jurassic system during the recovery of the first mining face is simulated, and the water inflow is indirectly calculated. The comparison between the two prediction results and the "large well method" shows that the two kinds of prediction results are close to each other. In addition, the drainage effect of working face is evaluated from the point of view of groundwater level and water volume changing with time, and verified by checking the single hole water output, and the local drainage effect is evaluated by using the rate of change of discharge and the rate of drainage. It can be seen that the obvious effect of drainage can reduce the pressure of water damage in face mining, so it has very important practical significance.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P641.4
本文编号：2433388
[Abstract]:There are abundant coal resources in Ordos Basin, but under the influence of diagenetic process and late stage structure, the distribution and occurrence of fracture-pore water in Jurassic coal seam roof sandstone are not uniform, which threaten the mining process to a certain extent. Therefore, the study of its hydrogeological characteristics, the evaluation of its sparsity and the change characteristics of seepage field in the process of simulated recovery are of guiding significance to the prevention and control of mine water hazards. Taking Bojiang Haizi Mine in Dongsheng Mining area as an example, the geological and hydrogeological conditions are systematically analyzed on the basis of consulting relevant literatures at home and abroad. The dynamic variation characteristics of water volume and water level in the middle Jurassic aquifer under the condition of sparse setting are studied in this paper, and the hydrogeological conceptual model and the mathematical model of pore-fracture three-dimensional unsteady flow are established. After identification and verification, the hydrogeological parameters of the study area are obtained. Using the above-mentioned model, the evolution process of the dewatering funnel formed by the drop of groundwater level in the middle Jurassic system during the recovery of the first mining face is simulated, and the water inflow is indirectly calculated. The comparison between the two prediction results and the "large well method" shows that the two kinds of prediction results are close to each other. In addition, the drainage effect of working face is evaluated from the point of view of groundwater level and water volume changing with time, and verified by checking the single hole water output, and the local drainage effect is evaluated by using the rate of change of discharge and the rate of drainage. It can be seen that the obvious effect of drainage can reduce the pressure of water damage in face mining, so it has very important practical significance.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P641.4
【参考文献】
相关期刊论文 前10条
1 马瑞杰;赵宇琦;张静;黄平;;基岩三维流数学模型求解的广义差分法及应用[J];吉林大学学报(地球科学版);2009年05期
2 贾金生,田冰,刘昌明;Visual MODFLOW在地下水模拟中的应用——以河北省栾城县为例[J];河北农业大学学报;2003年02期
3 王秀艳,刘长礼;对粘性土孔隙水渗流规律本质的新认识[J];地球学报;2003年01期
4 郭晓东;田辉;张梅桂;朱威;崔健;;我国地下水数值模拟软件应用进展[J];地下水;2010年04期
5 赵俊峰;刘池洋;喻林;王晓梅;;鄂尔多斯盆地中生代沉积和堆积中心迁移及其地质意义[J];地质学报;2008年04期
6 张幼宽;;裂隙-岩溶含水层双重介质渗流模型及其里兹有限元解[J];工程勘察;1983年04期
7 李宏卿;吴琼;李宏罡;李绪谦;;Visual Modflow在地下水资源评价中的应用[J];工程勘察;2005年03期
8 李平;卢文喜;马洪云;杨忠平;;Visual MODFLOW在地下水数值模拟中的应用——以公主岭市黄龙工业园水源地为例[J];工程勘察;2006年03期
9 薛禹群;;中国地下水数值模拟的现状与展望[J];高校地质学报;2010年01期
10 郑红梅;刘明柱;;Visual modflow在天津市地下水数值模拟中的应用[J];华北水利水电学院学报;2007年02期
，本文编号：2433388
本文链接：https://www.wllwen.com/kejilunwen/diqiudizhi/2433388.html
