祁东煤矿构造控水特征和地下水运移规律  

Characteristics of structural water control and groundwater migration in Qidong Coal Mine

作　　者：张培森[1,2] 李复兴 付翔 田志兆 牛辉 许大强 ZHANG Peisen;LI Fuxing;FU Xiang;TIAN Zhizhao;NIU Hui;XU Daqiang(National Key Laboratory for Mine Disaster Prevention and Control,Shandong University of Science and Technology,Qingdao 266590,China;National Experimental Teaching Demonstration Center for Mining Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Qidong Coal Mine,Anhui Hengyuan Coal&Electric Company Limited,Suzhou 234114,China;College of Mathematics and Systems Science,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东科技大学矿山灾害预防控制国家重点实验室培育基地,山东青岛266590 [2]山东科技大学矿业工程国家级实验教学示范中心,山东青岛266590 [3]安徽恒源煤电股份有限公司祁东煤矿,安徽宿州234114 [4]山东科技大学数学与系统科学学院,山东青岛266590

出　　处：《煤炭科学技术》2023年第2期292-305,共14页Coal Science and Technology

基　　金：国家重点研发计划资助项目(2018YFC0604702);国家自然科学基金资助项目(51379119);山东省自然科学基金资助项目(ZR2021ME086)。

摘　　要：以祁东煤矿为例,通过研究矿井地下水运移规律及其所在区域的构造控水特征,以期为煤矿水害的超前精准治理和区域防治提供借鉴参考。利用构造控水理论结合祁东煤矿及其所在矿区、煤田的地质构造背景,对构造控水的逐级控制作用和构造控水作用方式进行研究,结果如下:祁东煤矿基岩地层形态整体受宿南向斜控制,局部受魏庙断层等构造控制,新生界地层形态亦受到构造的间接控制;在宿南向斜控制下,矿井内或矿井外南部风化后的二叠系煤系砂岩裂隙含水层、太灰、奥灰与四含角度不整合接触;在魏庙断层控制下,在矿井南部采区部分二叠系煤系砂岩裂隙含水层含水层再次露头,与四含角度不整合接触,不整合接触使得含水层间可产生水力联系。总结分析结果,认为:(1)地质构造通过对地层形态的控制,对地下含水层水起到控制作用;(2)地质构造通过控制含水层间的接触,对含水层间的水力联系起到控制作用。为进一步验证含水层间的水力联系,利用水位变化的对比分析和皮尔逊(Person)相关系数,对放水试验期间南部采区四含、太灰和正常水位观测期间四含、太灰、奥灰的钻孔水位观测结果进行分析,得出:(1)南部采区放水试验期间,四含(SQ10-14)与太灰(ST4)水位变化基本同步,相关性极强;(2)正常水位观测期间,四含(SQ10)、太灰(ST4)、奥灰(SO_(2))两两之间水位变化具有极强的相关性,同一含水层内不同观测孔间水位变化的相关性差异较大。证实:受构造控制,在矿井局部,四含与基岩含水层角度不整合接触区域,存在水力联系。利用地下水数值模拟软件Groundwater Model System(GMS)结合参数反演Parameter Estimation(PEST),对四含水位分布和径流规律进行研究,得出:四含水位在-7~-57 m,南部水位比北部水位高,在魏庙断层处,水力梯度较大;四含水径流集中在矿井西南部和中部,西南部Taking Qidong Coal Mine as an example,this paper studies the law of groundwater migration and the characteristics of structur-al water control in the region,in order to provide reference for advanced precise control and regional prevention of coal mine water dis-asters.Based on the theory of structural water control and combined with the geological and structural background of Qidong Coal Mine and its mining area and coalfield,the step-by-step control effect of structural water control and the mode of structural water control are studied.The results are as follows:The bedrock formation morphology of Qidong Coal Mine is controlled by Sunan syncline as a whole,partly by Weimiao fault and other structures,and the Cenozoic formation morphology is also indirectly controlled by structures.Under the control of Sunan syncline,Permian coal-bearing sandstone fractured aquifer,Taihui,Ordovician limestone and aquifer IV angle uncon-formity contact after weathering inside or outside the mine;under the control of Weimiao fault,the aquifer of partial Permian coal-bearing sandstone fractured aquifer in the southern mining area of the mine outcrops again,and contacts with the aquifer IV angle unconformity,which makes the hydraulic connection between the aquifers.Based on the analysis results,it is considered that①the geological structure controls the underground aquifer water by controlling the formation morphology;②Geological structure controls the hydraulic connec-tion between aquifers by controlling the contact between aquifers.In order to further verify the hydraulic connection between aquifers,us-ing the comparative analysis of water level changes and Pearson correlation coefficient,the borehole water level observation results of aquifer IV,Taihui and aquifer IV,Taihui and Ordovician limestone in the southern mining area during the water discharge test and normal water level observation period were analyzed.The results show that:①During the water discharge test in the southern mining area,the water level changes of aqu

关 键 词：祁东煤矿 地下水运动 构造控水 水力联系 皮尔逊相关系数 水害治理 区域防治 

分 类 号：TD745[矿业工程—矿井通风与安全]