Simulation research on dynamic effect of coal and gas outburst
CAO Jie
SUN Haitao
DAI Linchao
SUN Dongling
WANG Bo
MIAO Fatian
Abstract：To investigate the coal-gas two-phase flow migration law and the characteristics of shock wave propagation after the coal and gas outburst started,a dynamic effect simulation test in low gas pressure was carried out by using the self-developed coal and gas outburst dynamic effect simulation test device.By realizing the active quick opening of the outburst mouth,the roadway network arrangement of a plurality of fluid migration routes and the resistance characteristics,as well as the all-directional real-time monitoring of the parameters,the migration process of coal-gas two-phase flow in roadway networks with this solid-gas parameter was simulated.The results show that the outburst coal movement in the roadway experiences three stages,which takes 3 053 ms.There is a jumping change of pressure and temperature after the outburst occurs,and the duration of pressure change is less than 1 s.The average propagation velocity of outburst shock wave front is 405.36 m/s.The overpressure peaks of shock wave show an attenuation trend along the roadway,the average attenuation coefficient of the shock wave at the connection roadway of the main road is 5 times that of other locations.
Keywords：coal and gas outburstsimulation experimentroadway networkcoal-gas two-phase flowshockwave
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 113-120,154 )