矿井大尺度冲击波传播规律数值模拟研究  

Numerical simulation of shock wave propagation law in large-scale mine

作　　者：张学博 高建良[1,2,3] 沈帅帅 任镜璋[3] 潘荣锟 王春霞 ZHANG Xuebo;GAO Jianliang;SHEN Shuaishuai;REN Jingzhang;PAN Rongkun;WANG Chunxia(State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization,Jiaozuo,Henan 454003,China;State Key Laboratory Cultivation Base for Gas Geology and Gas Control,Jiaozuo,Henan 454003,China;College of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo,Henan 454003,China;Henan Shenhuo Grp Co.Ltd,Yongcheng,Henan 476600,China)

机构地区：[1]煤炭安全生产与清洁高效利用省部共建协同创新中心,河南焦作454003 [2]河南省瓦斯地质与瓦斯治理重点实验室,河南焦作454003 [3]河南理工大学安全科学与工程学院,河南焦作454003 [4]河南神火煤电股份有限公司,河南永城476600

出　　处：《中国矿业大学学报》2021年第4期676-684,共9页Journal of China University of Mining & Technology

基　　金：国家重点研发计划项目(2018YFC0808103);国家自然科学基金项目(51734007,52074106);河南省省重点研发与推广专项(科技攻关)项目(212102310105);河南理工大学博士基金项目(B2019-56)。

摘　　要：为了解决矿井大尺度下瓦斯爆炸冲击波的传播规律研究难题,提出了冲击波传播的分段接力数值模拟法,解决了瓦斯爆炸数学模型确定、几何模型合理简化及各区段合理划分、动态边界条件下二维几何模型模拟冲击波传播规律的可行性分析等关键问题.研究表明:二维模型模拟实际大尺度巷道瓦斯爆炸是不可靠的,其模拟结果整体偏低且误差很大;距爆炸点200 m处,瓦斯积聚10 m时相对误差高达76.5%;基于动态边界条件下二维模型模拟冲击波传播规律是可行的,其模拟结果误差很小,距入口边界1000 m处,瓦斯积聚10 m时相对误差仅为9.78%.分叉巷道长度对冲击波超压影响较小,数值模拟时可将其他分叉及连接巷道合理简化.不同巷道连接形式对直巷道内冲击波传播影响范围均较小(10 m左右),但其对冲击波超压值影响程度有所不同;直巷道出口附近和T型巷道分岔口附近冲击波超压均略有降低,L型巷道拐弯附近直巷道内冲击波超压明显升高.确定了羊场湾矿其各区段的合理动态边界位置,合理划分了其几何模型,成功模拟了羊场湾矿掘进工作面瓦斯爆炸冲击波传播规律.In order to study the propagation law of gas explosion shock wave in large-scale mine,the segmented relay numerical simulation method was proposed.The key problems such as the determination of gas explosion mathematical model,the reasonable simplification of geometric model and the reasonable division of each section,and the feasibility analysis of two-dimensional geometric model simulating the propagation law of shock wave under dynamic boundary conditions were solved.The results show that it is not reliable to simulate actual large-scale roadway gas explosion with two-dimensional model,and the simulation results are generally low and the error is large;the relative error is as high as 76.5%when the gas accumulates 10 m away from the explosion point 200 m away.Based on the dynamic boundary condition,the two-dimensional model is feasible to simulate the shock wave propagation law,and the simulation result error is very small.The relative error is only 9.78%when the gas accumulates 10 m away from the entrance boundary 1000 m.The length of the bifurcated roadway has little effect on the overpressure of the shock wave,and the other bifurcated and connected roadways can be reasonably simplified in the numerical simulation.The impact range of different roadway connection forms on the shock wave propagation in the straight roadway is small(about 10 m),but the impact degree on the overpressure of shock wave is different;the overpressure of shock wave near the exit of the straight roadway and the fork of the T-shaped roadway decreases slightly,and the overpressure of shock wave near the turning of the L-shaped roadway increases significantly.The reasonable dynamic boundary position of each section in Yangchangwan mine is determined,and its geometric model is reasonably built.The propagation law of gas explosion shock wave in heading face of Yangchangwan mine is successfully simulated.

关 键 词：瓦斯爆炸 分段接力模拟法 冲击波传播 超压 

分 类 号：TU451[建筑科学—岩土工程]