NDLI: Evolution of acoustic emission in rock failure under different confining pressure

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Evolution of acoustic emission in rock failure under different confining pressure

Content Provider	Scilit
Author	Chen, Z. H. Yeung, M. R. Tham, L. G. Lee, P. K. K. Tsui, Y.
Copyright Year	2020
Description	A numerical failure model of rock, RFPA(Rock Failure Process Analysis), is used to simulate the process of rock failure under different confining pressures, including acoustic emission produced by rock failure. We find that the spatial distribution of acoustic emission (AE) event locations is fractal and has very good statistical self-similarity in different confined conditions. The fractal dimension D decreases progressively in the rock failure process. In other words, the AE event locations become more and more ordered. The fractal dimension D becomes eventually smaller in the specimen under higher confining pressure. The numerical results exhibit a complete faulting process corresponding to initiation, propagation and coalescence. The confining pressure plays an important role in the mode of rock failure in numerical simulations. The numerical simulations show that faulting shear fracture is mainly due to compressive fractures under high confining pressures; and that splitting fracture is due to tensile fractures under low or no confining pressure, as in a Brazilian test. Book Name: Frontiers of Rock Mechanics and Sustainable Development in the 21st Century
Related Links	https://api.taylorfrancis.com/content/chapters/edit/download?identifierName=doi&identifierValue=10.1201/9781003077510-24&type=chapterpdf
Ending Page	118
Page Count	4
Starting Page	115
DOI	10.1201/9781003077510-24
Language	English
Publisher	Informa UK Limited
Publisher Date	2020-12-17
Access Restriction	Open
Subject Keyword	Book Name: Frontiers of Rock Mechanics and Sustainable Development in the 21st Century Microscopic Research Numerical Simulations Evolution Rock Failure Confining Pressure Fractures Failure in Numerical
Content Type	Text
Resource Type	Chapter

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