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<p>Backfilling bodies in goaf play a crucial role in maintaining the overburden stability and preventing the subsidence damage. However, the potential instability of backfilling bodies poses a serious risk, leading to sudden overburden collapse and other disasters. Therefore, monitoring the stability of backfilling bodies is essential. This study introduces a novel carbon fiber composite backfilling material (CFCBM) with self-sensing capability for health monitoring. Through uniaxial compression tests, the damage coefficients (D) and resistivity change rate (RCR) of unimmersed and groundwater-immersed CFCBM were measured. A new method, based on the short-term resistivity change rates (ΔRCR), was proposed to assess backfilling bodies’ stability. The results indicate that using CFCBM to monitor backfilling bodies' stability is feasible. The CFCBM exhibits significant health self-sensing capability when the mass fraction of carbon fibers in the whole CFCBM exceeds 0.75%. While groundwater can affect the CFCBM due to changes in ion concentrations, the CFCBM shows minimal impact when the mass fraction of carbon fibers exceeds 2.00%. Furthermore, the ΔRCR could predict the damage development within the CFCBM, in which a rapid increase in ΔRCR indicates potential sudden cracks. This research contributes valuable insights into the field of mining, offering a potential guide for future studies on backfilling bodies' stability.</p>

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A Carbon Fiber-Reinforced Backfill Composite with Self-Sensing Capability for Mine Stability Monitoring

  • 期刊论文

  • 发表日期：

    2025年7月22日

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  • Bozhi Zhao,
  • Shan Ning,
  • Jingmin Xu,
  • Tianyu Li,
  • Wei Luo,
  • Pengjun Gao,
  • Weibing Zhu

摘要

Backfilling bodies in goaf play a crucial role in maintaining the overburden stability and preventing the subsidence damage. However, the potential instability of backfilling bodies poses a serious risk, leading to sudden overburden collapse and other disasters. Therefore, monitoring the stability of backfilling bodies is essential. This study introduces a novel carbon fiber composite backfilling material (CFCBM) with self-sensing capability for health monitoring. Through uniaxial compression tests, the damage coefficients (D) and resistivity change rate (RCR) of unimmersed and groundwater-immersed CFCBM were measured. A new method, based on the short-term resistivity change rates (ΔRCR), was proposed to assess backfilling bodies’ stability. The results indicate that using CFCBM to monitor backfilling bodies' stability is feasible. The CFCBM exhibits significant health self-sensing capability when the mass fraction of carbon fibers in the whole CFCBM exceeds 0.75%. While groundwater can affect the CFCBM due to changes in ion concentrations, the CFCBM shows minimal impact when the mass fraction of carbon fibers exceeds 2.00%. Furthermore, the ΔRCR could predict the damage development within the CFCBM, in which a rapid increase in ΔRCR indicates potential sudden cracks. This research contributes valuable insights into the field of mining, offering a potential guide for future studies on backfilling bodies' stability.