挡板缓冲下煤与瓦斯突出冲击波传播减能机制研究  

Study on energy reduction mechanism of mine outburst shock wave propagation under back plate buffer

作　　者：杨培君 谢雄刚[1] 任建军 尚延龙 罗香莹 YANG Peijun;XIE Xionggang;REN Jianjun;SHANG Yanlong;LUO Xiangying(Mining College,Guizhou University,Guiyang Guizhou 550025,China;College of Physics and Engineering,Xingyi Normal University for Nationalities,Xingyi Guizhou 562400,China)

机构地区：[1]贵州大学矿业学院,贵州贵阳550025 [2]兴义民族师范学院物理与工程技术学院,贵州兴义562400

出　　处：《中国安全生产科学技术》2022年第5期115-121,共7页Journal of Safety Science and Technology

基　　金：国家自然科学基金项目(5216016,51864009);贵州省教育厅自然科学重点项目(黔教科〔2011〕034号);贵州省教育厅青年成长人才项目(黔教合KY字〔2018〕414)。

摘　　要：为揭示煤与瓦斯突出冲击波在挡板缓冲条件下能量耗散规律,利用流体动力学理论建立突出冲击波在挡板缓冲下的传播特征分析的数学模型,分析突出冲击波沿巷道衰减的影响因素,基于不同的突出压力条件下煤与瓦斯突出物理模拟试验和数值模拟结果,研究沿着直巷道突出冲击波在挡板缓冲下能量的削弱机制和传播规律。研究结果表明:矿井突出冲击波能量的衰减程度主要与突出压力、输运煤粉做功和巷道横截面积有关,突出压力与冲击波传播超压成正相关关系,巷道横截面积是人为削弱冲击波能量最有效的途径;根据不同的突出压力,突出冲击波超压沿巷道主要表现为急剧增大,然后压力逐渐降低;挡板缓冲下反射冲击波与突出入射冲击波叠加的二次加速作用,导致挡板装置断面前后空间局部能量变大,但总体能量是减弱的,降低了突出冲击波的传播距离;通过理论分析、物理试验和数值模拟所得结果基本一致。In order to reveal the energy dissipation laws of mine outburst shock wave under the condition of back plate buffer,based on the theory of fluid dynamics,a mathematical model was established to analyze the propagation characteristics of outburst shock wave under the elastic buffer,and the influence factors of outburst shock wave attenuation along the roadway were analyzed.Based on the results of physical simulation test and numerical simulation of coal and gas outburst under different outburst pressures,the energy weakening mechanism and propagation laws of outburst shock wave along straight roadway under the elastic buffer were studied.The results showed that the attenuation degree of mine outburst shock wave energy was mainly related to the outburst pressure,work done by transporting pulverized coal and cross-sectional area of roadway.There was a positive correlation between the outburst pressure and the overpressure of shock wave propagation,and the cross-sectional area of roadway was the most effective way to weaken the energy of shock wave artificially.According to different outburst pressures,the overpressure of outburst shock wave increased sharply along the roadway,and then decreased gradually.The secondary acceleration effect of the superposition of reflected shock wave and outburst incident shock wave under back plate buffer resulted in the increase of local energy in the space before and after the section of elastic device,but the total energy was weakened,which reduced the propagation distance of outburst shock wave.The results of theoretical analysis,physical experiment and numerical simulation were basically consistent,which indicated that the analysis on the energy reduction mechanism of shock wave propagation in mine outburst is feasible.

关 键 词：冲击波 煤与瓦斯突出 挡板缓冲 减能 超压 

分 类 号：X936[环境科学与工程—安全科学] TD713[矿业工程—矿井通风与安全]