Real-time numerical simulations and experimental research for the propagation characteristics of shock waves and gas flow during coal and gas outburst
When coal and gas outburst occurs, high-speed gas flow and air shock wave with high kinetic energy could be created. In this paper, the formation process of outburst shock waves and gas flow has been analyzed firstly. Afterwards, the numerical simulation models of the roadways with right-angled intersection have been established, by which realtime simulation of the propagation of outburst gas flow and the process of gas transport has been conducted. Gas pressure, gas velocity and gas concentration can be simulated and shown. From analyzing the simulation results, qualitative and quantitative conclusions that the characteristics and patterns of the propagation and attenuation of outburst shock waves and gas flow can be arrived at. Finally, experimental models have been carried out to investigate the outburst shock waves and gas flow at the roadways with the similar shapes as the simulated ones. The results indicate that when shock wave and gas flow passes the intersection, most of the shock wave and gas flow will flow into the roadway of section opposite the intersection, and a little of it would flow into the roadway below the intersection. And turbulence will appear, shock wave reflects and diffracts at branches with more influence on the roadway below the intersection.
Coal and gas outburst Shock wave and gas flow Propagation characteristics Cross roadway
Kai Wang Aitao Zhou Jianfang Zhang Pin Zhang
School of Resource & Safety Engineering, China University of Mining & Technology (Beijing), Beijing School of Resource & Safety Engineering, China University of Mining & Technology (Beijing), Beijing Air Liquide (Hangzhou) Co., Ltd, Hangzhou, Zhejiang 310011, China
国际会议
The First International Symposium on Mine Safety Science and Engineering (首届矿山安全科学与工程学术会议)
北京
英文
488-498
2011-10-27（万方平台首次上网日期，不代表论文的发表时间）