ZHANG Y L, YANG M, QI L L,et al. Study on mining-induced failure mechanism of the floor aquifuge based on microseismic monitoring[J].Journal of Henan Polytechnic University(Natural Science) ,2025,44(6):110-117.

关键词:承压水;隔水层;破坏特征;微震监测;滞后破坏;数值模拟

doi:10.16186/j.cnki.1673-9787.2024120026

Received: 2024/12/12

Revised: 2025/06/10

Published: 2025/10/14

Study on mining-induced failure mechanism of the floor aquifuge based on microseismic monitoring

Zhang Yanli1,2, Yang Ming3,4, Qi Lingling3, Hao Dian5, Wang Chunxia6

1.Henan Coal Mine Filling and Settlement Reduction Engineering Technology Research Center， Jiaozuo  454150， Henan， China；2.Henan College of Industry & Information Technology， Jiaozuo  454000， Henan， China；3.School of Safety Science and Engineering， Henan Polytechnic University， Jiaozuo  454000， Henan， China；4.Zhengzhou Institute for Advanced Research of Henan Polytechnic University， zhengzhou  451464， Henan， China；5.Institute of Science and Technology， Jiaozuo Coal Industry Group Co.， Ltd， Jiaozuo  454002， Henan， China；6.School of Mining and Civil Engineering， Liupanshui Normal University， Liupanshui  553004， Guizhou， China

Abstract: Objectives To investigate the mining-induced failure characteristics of the floor aquifuge and ensure safe working face extraction， a study on the failure patterns of the floor aquifuge based on micro seismic monitoring was conducted. Methods With the 16001 working face in Zhaogu No.1 Mine as the research background， micro seismic monitoring and numerical simulation were employed to analyze the failure characteristics of the floor aquifuge during coal mining.  Results The floor aquifuge exhibited distinct stratified failure characteristics in the vertical direction： the 0~10 m interval beneath the floor was identified as a “full mining-induced damage zone" dominated by advance failure； the 10~15 m interval corresponded to a "partial mining-induced damage zone”" dominated by delayed failure； and depths beyond 15 m formed a “sporadic mining-induced damage zone” influenced mainly by geological structures. Kernel density analysis of micro seismic energy indicated that the floor failure depth in the 16001 working face ranged from 15 to 20 m， with maximum damage occurring in the central mining area. The key water-resistant stratum was identified as the siltstone underlying the L₉ limestone. Numerical simulation results showed good agreement with micro seismic monitoring data regarding floor failure depth.  Conclusions The findings reveal the mining-induced floor failure patterns in large mining-height working faces above confined aquifers， providing theoretical support for the prevention and control of mine floor water inrush.

Key words: confined water; floor aquifuge; failure characteristics; microseismic monitoring; delayed failure; numerical simulation