城郊煤矿底板太灰疏降流场演化的数值模拟与应用  

Numerical simulation and application of the floor evolution of flow field in Chengjiao Coal Mine

作　　者：汪佩 李鑫[2] 张金陵 丁亚恒 徐智敏[2] WANG Pei;LI Xin;ZHANG Jin-ling;DING Ya-heng;XU Zhi-min(Chengjiao Coal Mine,Henan Zhenglong Coal Industry Co.,Ltd.,Yongcheng 476600,China;China University of Mining and Technology,Xuzhou 221000,China)

机构地区：[1]河南省正龙煤业有限公司城郊煤矿,河南永城476600 [2]中国矿业大学,江苏徐州221000

出　　处：《煤炭科技》2021年第4期38-43,共6页Coal Science & Technology Magazine

基　　金：国家重点研发计划资助项目(2017YFC0804101)。

摘　　要：永煤公司城郊煤矿二2煤底板石炭系太原组岩溶裂隙承压含水层为煤层直接充水岩层,且岩溶裂隙较为发育;在系统收集和整理矿井现有地质、水文地质资料的基础上,结合必要的补勘工程,分析研究区控水构造特征、水文地质条件、典型采区疏水降压的可行性,开展矿井水文地质单元的精细划分及求参,评价了其突水危险性;利用数值模拟软件模拟了21304工作面底板太灰水疏降过程,进行疏水降压可行性分析。与实际疏降结果对比表明:当疏放水量为200 m^(3)/h时,23 d后L 8灰岩水压总体将会下降至设计的安全水位(5.04 MPa)以下,采用有限差分法对带压工作面底板疏水降压效果模拟与实际情况较为吻合,说明疏水降压是可行的。通过开展典型工作面(21304工作面)以疏降为主的防治水理论的研究,为城郊矿革新底板防治水手段、降低防治水工程成本等提供技术决策依据。The Karst fissure confined aquifer of the Carboniferous Taiyuan Formation of the Yongmei Coal Company Chengjiao Coal Mine is the direct water-filled rock layer of the coal seam,and the Karst fissures are relatively developed;based on the systematic collection and sorting of the existing geological and hydrogeological data of the mine,Combined with the necessary supplementary exploration projects,the study area′s water control structure characteristics,hydrogeological conditions,and the feasibility of drainage and pressure reduction in typical mining areas were analyzed,and the fine division of mine hydrogeological units and parameters were carried out to evaluate the water inrush hazard;The numerical simulation software simulates the dredging process of too gray water in the 21304 working face,and conducts the feasibility analysis of drainage and pressure reduction.The comparison with the actual dredging results showed that when the dredging water volume was 200 m^(3)/h,the L 8 limestone water pressure would drop below the designed safe water level(5.04 MPa)after 23 days.The difference method was more consistent with the actual situation in the simulation of the drainage pressure reduction effect of the working face under pressure,which showed that the drainage pressure reduction was feasible.By carrying out research on water prevention and control theory of typical working face(21304 working face)with dredging as the mainstay,it provided technical decision-making basis for the innovation of floor water prevention and control methods in the suburban mines and the reduction of water prevention and control engineering costs.

关 键 词：底板太灰水 水害防治 疏水降压 数值模拟 

分 类 号：TD745[矿业工程—矿井通风与安全]