Exploration and application of gas content index to coal seam outburst risk judgment
HENG Xianwei
LI Siguang
ZHU Junkui
DUAN Zhengpeng
Abstract：Gas content is a crucial indicator for assessing the risk of coal seam outbursts.However,under com-plex geological conditions,significant discrepancies often arise in the determination results.To investigate the applicability of the gas content indicator under such conditions,this study analyzes actual gas parameters from the No.14 coal seam in Dafang County,Guizhou Province.The research reveals that under complex geological environments,the critical value of gas content exhibits a noticeable "drift" phenomenon,making traditional static critical indicators inadequate for accurately reflecting actual outburst risks.To address this issue,this study introduces a resistance strength coefficient X through multi-parameter coupling analysis.Based on re-gression analysis,a dynamic prediction model for the minimum outburst gas content is established.Validation shows that the model's error range is controlled between 2％and 13％,significantly outperforming traditional static indicators in determination accuracy.The study demonstrates that the assessment of gas outburst risk should transition from static indicators to dynamic models.By developing dynamic models that reflect changes in geological conditions,outburst risks can be identified more precisely,thereby enhancing the accuracy of dis-aster prevention and control.
Keywords：outburst risk indexcoal resistance strength coefficientminimum outburst gas contentanalysis of outburst risk indicators
Publication Date：2026-02-28
Online Publishing Date：2026-03-12(First online date of this platform, not the publication date of the document)
Pages：6( 71-76 )