Applicability analysis of sensitive indexes for outburst prediction of No.21coal seam in No.9 coal mine of He coal mine
ZHEN Kangzhe
WANG Haidong
FANG Zheng
JIANG Qi
GAO Jiahui
Abstract：In order to improve the accuracy of outburst prediction in the No.21coal seam excavation working face of the No.9 Coal Mine,acombination of on-site experiments and theoretical analysis was used to obtain the sensitivity ranking of the outburst prediction indicators of the No.21 coal seam excavation working face of the No.9 Coal Mine,such as the initial velocity of drilling gas emission(q),the desorption indicators of drilling cuttings gas(Δh2、K1),and the amount of drilling cuttings(S),as M(q)>M(Δh2)>M(K1)>M(S).The dimensional analysis method is used to analyze the applicability of the initial velocity index of gas emission from boreholes.The research results show that the initial velocity of gas emission from boreholes is the best for the outburst prediction of No.9 Coal Mine No.21 Coal Seam,which reflects the most comprehensive coal stress,coal strength,and gas occurrence.The critical value of the initial velocity(q)index of gas emission from boreholes is determined to be 4.5 L·min-1 through theoretical calculation.
Keywords：coal and gas outburstforecast analysissensitive indicatorscritical value
Publication Date：2023-12-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 23-29 )