Identification and early warning method of key disaster-causing factors of AE signals for red sandstone by principal component analysis method

Gao, Ansen; Qi, Chengzhi; Shan, Renliang; Wang, Chunlai; Kocharyan, G. G.

doi:10.1016/j.asej.2023.102205

Cited by 4 publications

(1 citation statement)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Zhang et al 24 found that the energy dissipation of sandstone under freeze–thaw cycles is linearly positively correlated with the fragmentation fractal. Li 25 and Guo et al 26 conducted uniaxial compression tests of sandstone based on acoustic emission signals. It is considered that the acoustic emission signals increase significantly in the critical instability failure stage, and the cumulative location points and incremental location points of acoustic emission can characterize the whole process of rock damage and failure.…”

Section: Introductionmentioning

confidence: 99%

Study on energy evolution and fractal characteristics of sandstone with different fracture dip angles under uniaxial compression

Tian,

Zhao,

Wang

et al. 2024

Sci Rep

View full text Add to dashboard Cite

In order to investigate the failure modes and instability mechanism of fractured rock. Uniaxial compression tests were conducted on sandstone specimens with different dip angles. Based on rock energy dissipation theory and fractal theory, the energy evolution characteristics and fragmentation fractal characteristics in the process of deformation and failure of specimens were analyzed. The results show that the peak strength and elastic modulus of fractured rock mass are lower than those of intact samples, and both show an exponential increase with the increase of fracture dip angle. The energy evolution laws of different fracture specimens are roughly similar and can be classified into four stages based on the stress–strain curve: pressure-tight, elastic, plastic, and post-destructive. The total strain energy, elastic strain energy, and dissipated strain energy of the specimen at the peak stress point increased exponentially with crack inclination, and the dissipated strain energy and compressive strength conformed to a power function growth relationship. The distribution of the fragments after the failure of the fracture sample has fractal characteristics, and the fractal dimension increases with the increase of the fracture dip angle. In addition, the higher the compressive strength of the specimen, the greater the energy dissipation, the more serious the degree of fragmentation, and the greater the fractal dimension. The data fitting further shows that there is a power function relationship between the dissipated strain energy and the fractal dimension. The research results can provide a theoretical basis for the stability of rock mass engineering and structural deformation control.

show abstract

Section: Introductionmentioning

confidence: 99%