煤矿安全2025，Vol.56Issue(4)：100-109,10.DOI:10.13347/j.cnki.mkaq.20240142
开采扰动诱发阶梯组合断层滑移失稳的突变效应
Catastrophe effect of slippage instability of stepped combination fault induced by mining disturbance
摘要
Abstract
To investigate the mechanism of sudden fault slip induced by working face mining in stepped fault within a workface,the study takes the WII02040501 working face of Tunbao Coal Mine,which includes 17 faults,as the background.Theoretical analysis and numerical simulation were employed to establish a theoretical model for fault slip-induced sudden instability and to study the catastrophe effect of mining-induced fault slip instability in this workface,with engineering validation conducted through field micro-seismic data.The results show that it is proposed that the evolution of combined fault normal and shear stress is the primary trigger for fault slip;the working face mining towards the stepped combined fault,both the shear stress and normal stress on the fault plane exhibit stepped changes,with the shear stress demonstrating higher sensitivity;during fault slip,the shear stress on the fault plane rapidly increases,and the ratio of shear stress to normal stress undergoes catastrophe effect,and the release and concentration of strain energy alternate in the mining area of the workface;when the working face mining to a distance of 40 m from the fault,the stepped combination fault initiated slip from the top and synergistically propagated downwards,leading to an overall sudden change and instability in the combined fault.Microseismic data indicates that when the workingface was approximately 80 meters away from the fault,the T7 combination fault began to activate,with an increase in the frequency and energy of micro seismic near the fault,aligning with numerical simulation results.After the working face passes through the fault 40 m,the microseismic frequency and en-ergy reached their peak,indicating that damage and subsidence of the goaf roof,the fault experienced unloading effects,leading to a rapid decrease in normal stress,a rapid increase in shear stress,and overall fault sliding failure,consistent with the research findings.关键词
冲击地压/开采扰动/阶梯组合断层/断层滑移失稳/突变效应Key words
rock burst/mining disturbance/step combination fault/fault sliding instability/catastrophe effect分类
矿业与冶金引用本文复制引用
陈永科,温颖远,郑三龙,李康,曹民远,王向来,张文轩,徐源山,周晓峪,曹安业..开采扰动诱发阶梯组合断层滑移失稳的突变效应[J].煤矿安全,2025,56(4):100-109,10.基金项目
国家自然科学基金资助项目(52274098) （52274098）
新疆维吾尔自治区重点研发任务专项资助项目(2022B01034) （2022B01034）
