Research on a Non-Synchronous Coordinated Reduction Method for Slopes Based on the Hoek–Brown Criterion and Acoustic Testing Technology

Li He, Yongming Zhao (), Lin Yin, Dongwang Zhong, Haitao Xiong, Shasha Chen and Xinyue Zhang
Additional contact information
Li He: Hubei Key Laboratory of Systems Science in Metallurgical Process, Wuhan University of Science and Technology, Wuhan 430065, China
Yongming Zhao: College of Science, Wuhan University of Science and Technology, Wuhan 430065, China
Lin Yin: College of Science, Wuhan University of Science and Technology, Wuhan 430065, China
Dongwang Zhong: College of Science, Wuhan University of Science and Technology, Wuhan 430065, China
Haitao Xiong: College of Science, Wuhan University of Science and Technology, Wuhan 430065, China
Shasha Chen: College of Science, Wuhan University of Science and Technology, Wuhan 430065, China
Xinyue Zhang: College of Science, Wuhan University of Science and Technology, Wuhan 430065, China

Sustainability, 2023, vol. 15, issue 21, 1-21

Abstract: In the process of the evolution of rocky slope instability, the decay deterioration rate of cohesion c and internal friction angle φ are different, and there are also differences in the order and degree of their impact on slope stability; thus, it is of great theoretical value to propose a more practical calculation method for the reduction in slope degradation. This paper combines the Hoek–Brown criterion and an acoustic test method to estimate the mechanical parameters of slope rock mass; the correlative relationship within the double-strength parameter reduction was established by introducing advanced reduction steps (ARS), n , and correlation factor, λ , and a non-synchronous coordinated reduction (NSCR) method for the double parameters of slopes was proposed. Furthermore, methods for determining the comprehensive safety factor (CSF) of slopes during the coordinated reduction of double parameters are comparatively analyzed. The results of the application of engineering examples show that the strength of the slope rock mass is significantly reduced after several blast disturbances, and the equivalent cohesion is reduced from 1.05 MPa to 0.89 MPa, while the internal friction angle is reduced from 25.68° to 21.77°. The CSF calculated using the W. Yuan-2 method is closer to the results of the limit equilibrium method and is suitable for the calculation of the CSF of the NSCR of slopes. The slope CSFs show a trend of first increasing and then decreasing with the increase in n ; F S = 3.349 when n = 50, with a relative error of only 8.1% compared to the results calculated using the limit equilibrium method. The NSCR method remediates the blindness of the traditional strength reduction method in double-parameter reduction and ensures that the reduction range of the internal friction angle is no lower than its residual strength limit value, making it practical and feasible for slope stability analysis.

Keywords: slope stability; Hoek–Brown criterion; acoustic testing; non-synchronous coordinated reduction; limit equilibrium method (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/15/21/15516/pdf (application/pdf)
https://www.mdpi.com/2071-1050/15/21/15516/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:15:y:2023:i:21:p:15516-:d:1272250

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().