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Peer-reviewedCC BYScientific Reports

Mechanical properties and damage evolution mechanism of rubber-gangue cemented backfill under different loading rates

  • Teng Li1
  • Xionggang Zou2
  • Yongqiang Hou3
  • Yanli Wang4
  • Huihui Du5
  • Xinyue Zhang6
6 affiliations
  1. 1Songxian Shanjin Mining Co., Ltd.
  2. 2School of Economics and Management, Gannan University of Science and Technology
  3. 3Laboratory of Xinjiang Coal Resources Green Mining, Xinjiang Institute of Engineering, Ministry of Education
  4. 4The 52nd Research Institute of China Ordnance Industry Group
  5. 5Shougang Group Research Institute of Technology
  6. 6State Key Laboratory for Safe Mining of Deep Coal Resources and Environment Protection, Anhui University of Science and Technology
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Abstract

This study investigates the rate-dependent mechanical behavior and damage evolution of rubber-modified cemented gangue backfill through multi-scale macroscopic and microscopic tests. A piecewise statistical damage constitutive model based on the Weibull distribution is established to quantitatively characterize the dynamic failure process of modified backfill. The results reveal that rubber particle incorporation eliminates the critical loading rate effect observed in conventional backfill materials and remarkably improves the ductility of backfill specimens. The compressive strength and elastic modulus exhibit clear loading-rate sensitivity and decrease gradually with increasing rubber content. Both higher loading rate and larger rubber dosage effectively restrain the growth of internal damage variables, allowing the backfill to sustain greater deformation before final failure. Microscopic analysis further indicates that rubber particles expand internal pore distribution and promote progressive crack propagation, which dominates the transition of failure mode from brittle microcracking to ductile macroscopic fracture. The proposed constitutive model accurately reproduces the rate-dependent damage behavior of rubber-modified backfill, providing a reliable theoretical reference for the safety evaluation and engineering application of modified filling materials.

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Cite

BibTeXRIS
BibTeX
@article{li2026mechanical,
  title = {{Mechanical properties and damage evolution mechanism of rubber-gangue cemented backfill under different loading rates}},
  author = {Teng Li and Xionggang Zou and Yongqiang Hou and Yanli Wang and Huihui Du and Xinyue Zhang},
  journal = {Scientific Reports},
  year = {2026},
  month = sep,
  doi = {10.1038/s41598-026-70001-x},
  url = {https://doi.org/10.1038/s41598-026-70001-x},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Mechanical properties and damage evolution mechanism of rubber-gangue cemented backfill under different loading rates
AU  - Teng Li
AU  - Xionggang Zou
AU  - Yongqiang Hou
AU  - Yanli Wang
AU  - Huihui Du
AU  - Xinyue Zhang
PY  - 2026
DA  - 2026/09/01
JO  - Scientific Reports
DO  - 10.1038/s41598-026-70001-x
UR  - https://doi.org/10.1038/s41598-026-70001-x
AB  - This study investigates the rate-dependent mechanical behavior and damage evolution of rubber-modified cemented gangue backfill through multi-scale macroscopic and microscopic tests. A piecewise statistical damage constitutive model based on the Weibull distribution is established to quantitatively characterize the dynamic failure process of modified backfill. The results reveal that rubber particle incorporation eliminates the critical loading rate effect observed in conventional backfill materials and remarkably improves the ductility of backfill specimens. The compressive strength and elastic modulus exhibit clear loading-rate sensitivity and decrease gradually with increasing rubber content. Both higher loading rate and larger rubber dosage effectively restrain the growth of internal damage variables, allowing the backfill to sustain greater deformation before final failure. Microscopic analysis further indicates that rubber particles expand internal pore distribution and promote progressive crack propagation, which dominates the transition of failure mode from brittle microcracking to ductile macroscopic fracture. The proposed constitutive model accurately reproduces the rate-dependent damage behavior of rubber-modified backfill, providing a reliable theoretical reference for the safety evaluation and engineering application of modified filling materials.
SN  - 2045-2322
ER  -