基于MODFLOW的含水层间水力联系分析研究  

An analysis of hydraulic connection between different aquifers based on MODFLOW

作　　者：翟晓荣[1] 沈书豪 张海潮[1] 吴基文[1] 樊成[2] 龚世龙[3] 

机构地区：[1]安徽理工大学地球与环境学院,安徽淮南232001 [2]大连大学材料破坏力学数值试验研究中心,辽宁大连116622 [3]安徽省淮北矿业集团公司桃园煤矿,安徽宿州234116

出　　处：《水文地质工程地质》2015年第6期8-11,43,共5页Hydrogeology & Engineering Geology

基　　金：国家自然科学基金项目(41272278);高等学校博士学科点专项科研基金(20123415110002);国家青年基金项目(51104026)

摘　　要：为了探查桃园煤矿Ⅱ2采区太原组灰岩含水层与深部奥灰含水层之间的水力联系,开展了井下太灰含水层的放水试验。基于放水试验成果资料,利用Visual MODFLOW三维有限差分软件,经过多次模型调整,最终确定了符合采区水文地质条件的数值模型,查明了两含水层间的水力联系。结果表明：Ⅱ2采区太灰含水层与奥灰含水层间存在宽度为50~60 m,长度约为300 m的垂向直接补给带,其垂向渗透系数为5 m/d,侧向渗透系数为3 m/d,具有明显的各向异性,该方法可作为判定含水层间水力联系的一种新方法,研究结果可为采区下一步防治水措施提供依据。In order to explore the hydraulic connection between the Taiyuan formation confined aquifer and the Ordovician aquifer in the Ⅱ2 mining area in the Taoyuan coal mine,the pumping test of the Taiyuan formation aquifer under the coal mine was carried out. Based on the results of pumping test,the numerical model fitting to the hydrogeological conditions of the mining area was established by taking the advantage of the Visual MODFLOW,and the hydraulic connection of the two aquifers was examined. The results show that there is a vertical supply channel between the two aquifers in the Ⅱ 2 mining area. The width of the channel was between 50 m to 60 m and the length was about 300 m. The vertical and lateral coefficients of permeability were 5 m / d and 3 m / d,indicating obvious anisotropy. This method is regarded as an exploration to identify the hydraulic connection between different aquifers and the results can also provide the basis for water prevention in a coal mine.

关 键 词：桃园煤矿 放水试验 VISUAL MODFLOW 含水层 

分 类 号：P641.2[天文地球—地质矿产勘探]