Fractal characteristics and acoustic emission b -value of cement superfine tailings backfill with initial defect consideration
Source abstract
Abstract
To clarify the influence mechanism of initial defects on the internal crack evolution law and damage destruction of cement superfine tailings backfill(CSTB), uniaxial compression and simultaneous acoustic emission (AE) tests were carried out on CSTB with different degrees of internal initial defects constructed by doping with different contents of doping agent(DA), and the AE b-value, amplitude fractal dimensional time series characteristics and three-dimensional distribution law of AE events of CSTBs were analyzed in this paper. The research shows that the doping of DA caused the fluctuation and jump of the CSTB b-value to be significantly enhanced, and the b-value showed two jumps in the loading process. The fractal characteristics of CSTB with different DA doping are better, and the fractal dimension D-value and b-value both show a rapid decreasing trend in the preparation process of the specimen for the occurrence of overall unstable failure. The admixture of DA increases the number of initial defects and non-homogeneity within the CSTB, making the generation of 3D localization points of AE events somewhat random. The results of the study can help to better analyze the unstable failure process of the backfill in the mine hollow area and carry out the corresponding support work.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Rock Mechanics and Modeling · Tailings Management and Properties · Geotechnical and Geomechanical Engineering
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Solids Waste and Chemicals Management Center, Ministry of Ecology and Environment, Beijing, China
School of Civil and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi, China
School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing, China
Funding
National Natural Science Foundation of China · Training Plan for Academic and Technical Leaders of Major Disciplines of Jiangxi Province · Natural Science Foundation for Distinguished Young Scholars of Jiangxi Province · National Key R&D Program of China
References (58)
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