摘要
为研究真实尺度下煤矿掘进工作面瓦斯爆炸冲击波和火焰的传播规律,利用气体爆炸数值仿真软件建立了不同尺度的掘进巷道模型,研究预混瓦斯体积分数、预混瓦斯长度和巷道空间特征对掘进工作面瓦斯爆炸冲击波超压和火焰传播的影响规律。研究表明:原尺度下掘进工作面瓦斯爆炸的最大超压可达180~630 kPa,巷道截面约束度和预混瓦斯量是掘进工作面瓦斯爆炸压力和火焰作用范围的重要控制因素,火焰高速传播的阻力会导致火焰扩散变慢,并最终使火焰膨胀比趋于定值。
To study the propagation of gas explosion shock wave and flame in coal mine heading face at real scale,the numerical simulation software of gas explosion was used to establish roadway models of different scales,and the influence of premixed gas concentration,premixed gas length and roadway spatial characteristics on the overpressure and flame propagation was studied.It is found that the maximum overpressure of gas explosion in heading face can reach 180-630 kPa under the original scale.The constraint degree of roadway section and premixed gas amount are important control factors of gas explosion pressure and flame range.The resistance of high-speed flame propagation will lead to slow flame diffusion and eventually make the flame expansion ratio tend to a certain value.
作者
朱云飞
王德明
赵安宁
张玉涛
ZHU Yunfei;WANG Deming;ZHAO Anning;ZHANG Yutao(Shanxi Institute of Technology,Yangquan 045000,China;School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,China;College of Safety Science and Engineering,Xi’an University of Science and Technology,Xi’an 710054,China)
出处
《煤矿安全》
CAS
北大核心
2023年第10期24-28,共5页
Safety in Coal Mines
基金
山西省基础研究计划(自由探索类)青年科学研究资助项目(202103021223391)
山西省高等学校科技创新计划资助项目(2021L592)
国家自然科学基金重点资助项目(52130411)。
关键词
煤矿安全
瓦斯爆炸
掘进工作面
超压
火焰传播
coal mine safety
gas explosion
heading face
overpressure
flame propagation
