采矿与安全工程学报Issue(1)：139-145,7.
瓦斯爆燃防爆安全距离及传播特征的数值模拟
Numerical simulation of explosion-proof safety distance and propagation characteristics of gas deflagration
摘要
Abstract
In this paper, an explosion roadway with the length of 100 m and cross-sectional area of 0.08 m×0.08 m was established by using AutoReaGas Software, where the methane/air mixture gas with 9.5%fuel concentration is distributed uniformly within the first 10 m of the roadway. The results show that the maximum explosion overpressure presents a changing trend of decreasing, increasing, and de-creasing again in the process of gas explosion propagation, and reaches its maximum value near the lo-cation where the flame is extinguished. Both the maximum combustion rate and flame propagation speed increase firstly with the increase of propagation distance, and then begin to decrease after obtain-ing their corresponding maximum values. The maximum overpressure and gas velocity have reduced to zero at the distance of 35 m from the ignition source, and the maximum density also has decreased to its initial value at this distance. These trends indicate that the explosion-proof safety distance is 35 m under this condition. The maximum combustion rate and flame propagation speed have reduced to zero at the distance of 17 m, which indicates that the maximum distance of flame propagation is 17 m. The occur-rence of gas backflow is related to flame propagation. The research results can provide references to op-timal route determination for avoiding gas explosion disasters in underground coal mines, the emergen-cy rescue and disaster relief after gas explosion, the explosion accident investigation, and so on.关键词
瓦斯爆炸/爆炸波/火焰/防爆安全距离/数值模拟Key words
gas explosion/blast wave/flame/explosion-proof safety distance/numerical simulation分类
矿业与冶金引用本文复制引用
江丙友,林柏泉,陈健,郭畅,张鹏..瓦斯爆燃防爆安全距离及传播特征的数值模拟[J].采矿与安全工程学报,2014,(1):139-145,7.基金项目
国家重大科学仪器设备开发专项资金项目(2013YQ17046309)；国家自然科学基金项目(51204174，51274195，51004048，51374003， U1361106)；江苏省普通高校研究生科研创新计划项目(CXZZ12_0960)；中央高校基本科研业务费专项资金项目(2012DXS02)；江苏省自然科学基金项目(BK2012571)；教育部新世纪优秀人才支持计划项目(NCET-12-0959) （2013YQ17046309）
