Research Progress and Prospects on Damage Evolution and Constitutive Models of Cemented Backfill
SONG Weidong, WANG Yihai, XIA Wenhao, LI Jiajian, XIANG Zhuozhi, WANG Ziyi,
2026, 55(8):
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Cemented backfill is a key load-bearing structure in backfill mining,playing an important role in supporting
surrounding rock,controlling ground pressure,and ensuring stope stability.Its damage evolution behavior and constitutive mod
els are directly related to the reliability of stability evaluation and structural design of deep stopes.With the increase in mining
depth,cemented backfill is subjected to complex environments involving high in-situ stress,high temperature,seepage erosion,
and blasting disturbance,and traditional evaluation methods based mainly on strength parameters can no longer meet engineer
ing requirements.Based on the needs of safe and efficient deep metal mining and green backfill development,this paper sys
tematically reviews the research progress on damage evolution and constitutive models of cemented backfill,focusing on damage
characterization,damage evolution,and constitutive modeling.First,the definition methods of damage variables,including elas
tic modulus degradation,statistical distribution theory,energy dissipation,acoustic emission parameters,and physical detection
methods,are summarized.Then,the damage evolution laws under static loading are discussed from the perspectives of uniaxial compression,conventional triaxial compression,true triaxial compression,and special service environments involving tempera
ture,seepage,and chemical corrosion,and the dynamic damage accumulation characteristics are analyzed in terms of strain rate
effect,coupled static-dynamic loading,and cyclic impact.On this basis,the research status of static damage constitutive mod
els,creep constitutive models,dynamic damage constitutive models,and backfill-rock composite constitutive models is re
viewed.The results show that:① Damage variables of cemented backfill have gradually evolved from single macroscopic me
chanical parameter characterization to multi-source damage characterization,but the quantitative relationships among different
indicators still need to be improved;② Under static loading,the damage evolution of cemented backfill is jointly affected by
stress path,material proportion,and service environment,showing obvious stage characteristics and path dependence;③ Under
dynamic loading,the damage of cemented backfill is mainly manifested as strain rate effect,coupled static-dynamic response,
and cyclic impact accumulation,but a gap remains between laboratory tests and field disturbance conditions;④ Existing consti
tutive models can describe various mechanical behaviors,but the physical meaning of model parameters,applicability bounda
ries,and engineering generalization still need to be strengthened.During the 15th Five-Year Plan period and beyond,future re
search should focus on:① Establishing a quantitative correlation among multi-source damage indicators and a multi-scale dam
age variable characterization framework;② Deepening the understanding of thermal-hydraulic-mechanical-chemical coupling
damage mechanisms and developing generalized multi-field coupled constitutive models;③ Developing true triaxial coupled
static-dynamic loading and cyclic impact test methods and establishing quantitative correspondences between laboratory test
conditions and field disturbance conditions;④ Building a predictable parameter calibration framework for constitutive models to
enhance the physical interpretability and engineering applicability of model parameters;⑤ Promoting the development of intel
ligent damage identification and stability early warning technologies that integrate data-driven approaches with physical mecha
nisms.
