Numerical simulation for propagation characteristics of shock wave and gas flow induced by outburst intensity

• Published in: International journal of mining science and technology Vol. 25; no. 1; pp. 107 - 112
• Main Authors: Zhou, Aitao, Wang, Kai, Wang, Li, Du, Feng, Li, Zhilei
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.01.2015; Elsevier
• Subjects: Coal and gas outburst; Fluent软件; Outburst intensity; Propagation characteristics; Shock wave and gas flow; 传播特性; 数值模拟; 气流冲击; 空气冲击波; 突出强度; 诱导; 高压气体; Outburst intensity; Propagation characteristics; Coal and gas outburst; Shock wave and gas flow
• ISSN: 2095-2686
• DOI: 10.1016/j.ijmst.2014.12.009

In order to analyze the propagation characteristics of shock wave and gas flow induced by outburst inten- sit-y, the governing equations of shock wave and gas flow propagation were put forward, and the numer- ical simulation boundary condition was obtained based on outburst characteristics. The propagation characteristics of shock wave and gas flow were simulated by Fluent software, and the simulation results were verified by experiments. The results show that air shock wave is formed due to air medium com- pressed by the transient high pressure gas which rapidly expands in the roadway; the shock wave and gas flow with high velocity are formed behind the shock wave front, which significantly decays due to limiting effect of the roadway wall. The attenuation degree is greater in the early stage than that in the late stage, and the velocity of gas convection transport is lower than the speed of the shock wave. The greater the outburst intensity is, the greater the pressure of the shock wave front is, and the higher the speed of the shock wave and gas flow is.