Research on identification and prevention technology of impact hazardous areas of triangular coal pillars under penetrating faults
Lü Zhen
Wen Yingyuan
Guo Wenhao
Cao Anye
Zhang Xiaolei
Cui Zhiying
Guo Jisen
Abstract：Fault-type rock bursts occur frequently in China,among which rock bursts in triangular coal pillars under penetrating faults pose a greater danger,severely restricting the safe and efficient production of coal mines.Taking the No.506 working face of a certain mine as the research background,the evolution law of stress and energy in triangular coal pillars during the passage of working face through a penetrating fault was studied through numerical simulation,revealing the impact mechanism of triangular coal pillars under penetrating fault.Based on the stress distribution characteristics of triangular coal pillars,impact stress indicators were established,and the impact hazard zones and levels of triangular coal pillars were divided.Combining the energy accumulation characteristics of triangu-lar coal pillars,classified prevention and control measures combining large-diameter drilling,coal body blasting,and roof blasting were proposed.The energy accumulation pattern of triangular coal pillars indicates that when the width of the coal pillar ranges from 50-150 meters and 0-50 meters,additional roof and coal seam blasting pressure relief measures need to be taken.The effectiveness of these pressure relief measures has been verified on-site.
Keywords：rock burstpenetrating faulttriangular coal pillarnumerical simulationstress evolution
Publication Date：2025-12-30
Online Publishing Date：2026-01-31(First online date of this platform, not the publication date of the document)
Pages：6( 207-212 )