Izvorni znanstveni članak
https://doi.org/10.17794/rgn.2021.3.11
NUMERICAL AND EXPERIMENTAL RESEARCH OF ROCK FAILURE MECHANISM AND ITS DEPENDENCE ON mi HOEK-BROWN FAILURE CRITERION
Sina Salajegheh
; Department of Mining Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
Kourosh Shahriar
; Department of Mining and Metallurgy Engineering, Amirkabir University of Technology, Tehran, Iran
Hossein Jalalifar
; Department of Petroleum Engineering, Shahid Bahonar University of Kerman, Kerman, Iran
Kaveh Ahangari
; Department of Mining Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
Sažetak
Rock failure mechanism is one of the most important issues in rock mechanics engineering which plays a key role in the stability analysis of various structures. Therefore, different failure criteria have been proposed to understand the failure mechanism of rocks. One of the most commonly used rock failure criteria is the Hoek-Brown criterion, in which there is a parameter called mi, which is very important to the response provided by this criterion. Due to the importance of conducting extensive studies on this parameter, in this current research, by performing a series of experimental triaxial compressive strength test and numerical simulating in PFC-2D code, the effect of the Hoek-Brown constant mi on the failure mechanism and crack growth of different rocks has been studied. Based on the results of this study, it was found that the effect of parameter mi on the failure mechanism of different rocks varied according to the type of rocks, and the greatest effect of this parameter was on the peak strength of rocks. In addition, it was found that under higher lateral pressures, there are less destructive cracks in rocks, and as a result, they show more ductile behaviour.
Ključne riječi
Failure Mechanism; Hoek-Brown criterion; mi parameter; Triaxial Compressive Strength; PFC-2D
Hrčak ID:
259512
URI
Datum izdavanja:
23.6.2021.
Posjeta: 876 *