Damage study of fiber-doped superfine tailings cemented backfill based on acoustic emission cumulative ringing count
Source abstract
Abstract
To investigate the damage evolution and acoustic emission (AE) characteristics of fiber-reinforced superfine tailings cemented backfill (FRSCTB) in deformation damage, AE tests were conducted under uniaxial compression conditions on different FRSCTB specimens, and the damage evolution of different FRSCTBs under load was analyzed in terms of AE energy, ringing count and amplitude fractal dimension. The coupling relationship between the cumulative ringing count and the damage equation of the FRSCTB was established using time as the intermediate quantity. The study shows that: (1) the strength of the fiber-doped superfine tailings cemented backfill is significantly enhanced under uniaxial compression, and the damage mode belongs to ductile damage; (2) some of the FRSCTB does not have a quiet period or appear for a short time during the AE process, the energy counting and ringing counting curves of a few specimens show a bimodal or multipeak type, and the AE quiet period can be used as rupture precursor information; (3) the fractal dimension of the FRSCTB tends to stabilize at the stress peak and fluctuates only in a small range; and (4) the coupling relationship between cumulative AE ringing counts and stress and damage variables is derived, and the model accuracy is high after comparing the experimental data with the proposed model. The conclusions of the study have certain practical significance for predicting the compressive strength and damage process of FRSCTB and can provide some reference for the engineering of similar mines and related industries.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Tailings Management and Properties · Rock Mechanics and Modeling
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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