Research on impact hazard assessment method based on stress concentration index
JU Chengrun
ZHANG Ningbo
XU Qianhai
XIAO Manman
YANG Xinwen
SUN Lianye
HU Yuheng
Abstract：Rockburst is a typical dynamic disaster of coal and rock in the coal mining process,posing a serious threat to the safety production of coal mines in China.To address the common issues in existing rockburst risk assessment methods,such as the singularity of indicators and insufficient analysis of the coupling mechanism between dynamic and static stress,this study proposes a comprehensive evaluation method based on multi- source stress concentration indices.This method constructs four types of stress concentration indices—static load,geological,mining-induced,and roof dynamic load disturbance—to quantitatively characterize the degree of stress concentration at the working face during different mining stages,and then integrates them into a com-prehensive stress concentration index K,which is used to classify rockburst risk levels.Using a practical exam-ple from the 1200 isolated working face of a mine in Shanxi,the stress evolution patterns were analyzed through FLAC3D numerical simulation,and the evaluation results were verified using field monitoring data.The results show that the method can effectively identify rockburst risk areas during the mining of the working face,demon-strating the feasibility of stress index-based rockburst risk assessment and providing new ideas for safe coal mining and rockburst risk evaluation analysis.
Keywords：stress concentration indeximpact hazardevaluation methoddynamic and static load analysisrock burst
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：7( 147-153 )