Rock mass shear strength
Web3 Mar 2024 · Underground space engineering structures are generally subject to extensive damages and significant deformation. Given that composite rocks are prone to shear failure, which cannot be accurately monitored, the piezoelectric active sensing method and wavelet packet analysis method were employed to conduct a shear failure monitoring test on … WebAs a natural geological material, rock contains defects such as fractures and joints and has strong heterogeneity, which leads to certain differences in the strength and deformation characteristics of different size rocks, that is, a size effect [1,2].Because the mechanical properties and parameters of rock mass are the important basis of surrounding rock …
Rock mass shear strength
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Web23 Aug 2024 · Estimation of rock mass strength and shear strength of discontinuities was done based on field surveys for rock mass characterization, application of empirical methods (Hoek and Brown, 1997) and analyses of existing laboratory tests to provide data for the comparison with results obtained by the numerical modelling study. Web14 Jul 2024 · In this paper, variation in shear strength parameters of rock over rock and concrete over rock interfaces in granite rock mass is studied among three different …
Web1 Jun 2024 · Since the mechanical properties of joints are important to control the stability of rock masses, the peak shear strength for the joints has always been the focus of … Application of Q-system and index tests to estimate shear strength and … Brown [15] conducted a number of triaxial tests on intact and jointed rock mass … select article Shear strength criteria for rock, rock joints, rockfill and rock …
Web13 Apr 2024 · Rock sections in intermittent joints are important structures that prevent joints from interconnecting and maintain the stability of the rock mass, and they play a pivotal role in the strength and failure mode of the rock mass. In order to analyze the controlling effect of rock section in intermittent joints, the samples with different rock section angles were … WebA persistent discontinuity is a continuous plane in a soil or rock mass. Shear displacement takes place if the shear stress along the discontinuity plane exceeds the shear strength of …
Web9 May 2024 · τ f is the actual shear strength of rock mass, τ m is the mean shear stress on the assumed surface of failure mobilized to maintain body in equilibrium. According to the aforementioned Equation (1), the factor of safety ( FOS ) is defined as the ratio of soil/rock shear strength at the failure to the mobilized shear stress on the surface of failure.
Web12 Apr 2024 · Currently, research on bolt support can be roughly divided into three categories according to the main focus: (i) study on the effects of the properties of the anchored rock mass (surrounding rock), such as the lithology of the surrounding rock, the strength of the surrounding rock, joints, cracks, and weak interlayer [7–10]; (ii) study on … ny sweatersWeb20 Feb 2024 · As they reported, the shear strength of a rock mass is underestimated if the joint roughness is ignored. Thus, laboratory experiments have been widely used to study the shear behavior of jointed rock, and remarkable achievements have been made to understand the mechanical response. magna trail women’s vivo barefootWeb15 Dec 2016 · The shear strength of a rock joint, or discontinuity, is typically measured using a direct shear test where a load is applied initially, normally to the joint, before this … magna training productsWeb26 Jul 2024 · The dynamic response of rock mass is largely restricted by its joint surface. Previous studies have shown that the degradation of joint surface can not be ignored … nys weatherization directors associationWebshear strength parameters for the interfaces of rock to rock joints as well as concrete to rock joints are considered for the stability analysis. The shear strength parameters are … magnat referenceWebThe primary objective of this study is to develop a parameter with a clear physical meaning to estimate the surface roughness of rock discontinuities. This parameter must be closely related to the shear strength of rock discontinuities. The first part of this study focuses on defining and computing this parameter. The estimation formula for the shear strength of … magnatrometer shift lightWebintact rock. The shear strength of this complex rupture surface cannot be determined analytically, so a set of empirical equations has been developed from which the cohesion … magnat reference 3a