Study on mining-induced failure mechanism of the floor aquifuge based on microseismic monitoring
Zhang Yanli
Yang Ming
Qi Lingling
Hao Dian
Wang Chunxia
Abstract：Objectives To investigate the mining-induced failure characteristics of the floor aquifuge and en-sure safe working face extraction,a study on the failure patterns of the floor aquifuge based on microseis-mic monitoring was conducted.Methods With the 16001 working face in Zhaogu No.1 Mine as the research background,microseismic monitoring and numerical simulation were employed to analyze the failure charac-teristics of the floor aquifuge during coal mining.Results The floor aquifuge exhibited distinct stratified fail-ure 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"par-tial mining-induced damage zone""dominated by delayed failure;and depths beyond 15 m formed a"spo-radic mining-induced damage zone"influenced mainly by geological structures.Kernel density analysis of microseismic 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 mi-croseismic 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 theo-retical support for the prevention and control of mine floor water inrush.
Keywords：confined waterfloor aquifugefailure characteristicsmicroseismic monitoringdelayed fail-urenumerical simulation
Publication Date：2025-11-30
Online Publishing Date：2025-10-22(First online date of this platform, not the publication date of the document)
Pages：8( 110-117 )