Failure criteria of the geological dynamic system of coal and gas outburst
LUO Mingkun
FAN Chaojun
LI Sheng
YANG Zhenhua
ZHANG Haohao
YANG Hongzhi
LAN Tianwei
Abstract：To further clarify the reason and evolution of the outburst occurrence,this paper put forward a geological dynamic system on the basis of analyzing the outburst phenomenon and the existing research results.The evolution process of the geological dynamic system was explored,and the criteria for formation and development of geological dynamic system was constructed.Results show that coal-gas medium is the material basis of outburst.The dynamic environment creates a setting of high tectonic stress,low coal rock strength and high gas occurrence for outburst,while the mining disturbance provides excitation power and space conditions.The occurrence of outburst needs to be experienced by the evolution,formation,development and termination of the geology dynamic system.This process needs to satisfy the formation criterion C1 of geological dynamic system,and the development needs to satisfy the instability criterion C2 and energy criterion C3.It is possible to reveal the occurrence mechanism of typical coal and gas outburst accidents by using the criterion of geological dynamic system,which provides the basis for the prediction and prevention of outburst in heading face.
Keywords：coal and gas outburstmechanism of outburstgeological dynamic systemfailure criterionevolution law
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：8( 137-144 )