Particle flow numerical simulation model for coal and gas outburst and its microscopic outburst mechanism description

被引：0
|
作者：
Jiao, Huice [1 ,2 ]
Song, Weihua [1 ,2 ]
机构：
[1] China Pingmei Shenma Corp Grp, State Key Lab Coking Coal Exploitat & Comprehens U, Pingdingshan 467000, Peoples R China
[2] Liaoning Tech Univ, Coll Min, Fuxin 123000, Peoples R China
来源：
SCIENTIFIC REPORTS | 2024年 / 14卷 / 01期
关键词：
D O I：
10.1038/s41598-024-52973-w
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The finite difference model and particle flow model were constructed to reproduce the process of coal and gas outburst in front of the tunnel. The reliability of the particle flow model was verified by studying the internal stress, gas pressure, and related parameters of gas and coal two-phase flow. Then the process of coal and gas outburst is described from a microscopic perspective. The results show that the particle flow numerical model of coal and gas outburst is in line with reality and can intuitively and conveniently monitor relevant parameters; The concentrated stress caused by excavation of tunnels can reach 1.2 times the in-situ stress; High stress causes the adhesion between coal particles to break down, which is the main reason for the initiation of coal and gas outbursts; The intermittent breakthrough of gas on the coal particle collection that blocks the release channel has caused pulsating characteristics of coal and gas outbursts.
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页数：11
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