Applied Sciences, Journal Year: 2025, Volume and Issue: 15(8), P. 4393 - 4393

Published: April 16, 2025

Addressing the critical technological needs for real-time monitoring of stress distribution in mining areas, a new method inverting goaf pressure using distributed optical fiber data is proposed. By coupling key stratum fracture mechanics model with subsidence trajectory function model, theoretical established to accurately describe spatial evolution during coal mining. The quantifies relationship between changes and failures through two-stage analysis process, based on distinct mechanical properties before after fracture. Physical experiments (3 m × 0.2 1.1 m) Brillouin Optical Time Domain Analysis (BOTDA) technology validated proposed method, comprehensive deformations. layer settlement dynamic transformation pre-fracture post-fracture stages realized, can be monitored predicted real time. results demonstrate consistency locations peak positions. High-precision sensing detected an ultimate strain threshold 4000 με failure, measurements consistently below this threshold. developed inversion formula successfully patterns within goaf, achieving capabilities. Compared BPPS measurements, deviation inverted less than 8.88%, root mean square error (RMSE) 0.98–1.20 different propulsion stages, coefficient determination (R2) 0.72 0.85. These findings provide crucial theory predicting implications improving safety systems optimizing operations.

Language: Английский