Results 231 to 240 of about 5,863 (268)

Research on Shear Failure Criterion for Layered Rock Mass

Advanced Materials Research, 2012
In order to study the stability of layered rock mass, a shear failure criterion for layered rock mass is presented and its program is compiled in C language. The shear failure criterion consists of two parts: firstly, four empirical expressions are suggested in which shear strength parameters vary with the direction; secondly, a pilot calculation ...
Zhi Zeng Zhang, Lan Lan Zhou, Zhen Xia Yuan, Zhong Hua Sun   +3 more
openaire   +1 more source

Analysis of Deformation Characteristics of Layered Rock Tunnel Excavation Based on Statistical Mechanics of Rock Masses

ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part A: Civil Engineering
Layered rock mass is prevalent in tunnel engineering, where deformation and failure of surrounding rock are primarily governed by discontinuity structural planes, leading to significant anisotropy in deformation and strength characteristics.
Faquan Wu, Weixin Wan, Yun Tian, Ying Yang, Bing Yang   +4 more
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The “equivalent” anisotropic properties of layered rock and soil masses

Rock Mechanics Felsmechanik Mécanique des Roches, 1972
The cross-anisotropic elastic material “equivalent” to stratified rock or soil is examined, assuming the individual strata to be isotropic. It is shown that there are restrictions on the ranges of permissible variation of some of the five characteristic constants compared with those of a general cross-anisotropic material. Consideration is given to the
L. J. Wardle, C. M. Gerrard
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An improved equivalent constitutive model for layered rock mass considering layer structure and the effect of asymptotic deterioration of deformation and strength

Computers and Geotechnics
As a kind of widely exposed engineering rock mass, layered rock mass exhibits extremely anisotropy and significant asymptotic deterioration effect in both deformation and strength.
Quan Jiang
exaly   +2 more sources

Numerical modeling of wellbore stability in layered rock masses

Arabian Journal of Geosciences, 2015
Borehole instabilities during drilling are more common in bedding plane rocks than in most other rock formations. Bedding plane rocks make up more than 80 % of rocks in siliciclastic environments, and about three quarters of borehole problems are caused by bedding plane rocks instability.
H. Parsamehr, S. D. Mohammadi, P. Moarefvand   +2 more
openaire   +1 more source

Fracture permeability normal to bedding in layered rock masses

International Journal of Rock Mechanics and Mining Sciences, 2001
Abstract A two-dimensional model of fracture permeability normal to bedding in layered rock with orthogonal, bed-delimited fractures is investigated. Steady-state, saturated laminar flow is assumed. Permeability is assumed to be a function of apertures and flow path lengths in an otherwise impermeable matrix.
D.M. Doolin, M. Mauldon
openaire   +1 more source

Influence of scour on the vertical response of rock‐socketed piles in layered saturated rock–soil mass

International Journal for Numerical and Analytical Methods in Geomechanics, 2022
AbstractThe influence of scour on the vertical response of rock‐socketed piles in a layered saturated rock–soil mass is studied through the finite element‐boundary element coupling method. By utilizing the theoretical solution of layered saturated media as the kernel function, the boundary element method (BEM) is used to deduce the boundary integral ...
Yuan Feng Chen, Zhi Yong Ai, Zhan Guo Ma, Zi Kun Ye   +3 more
openaire   +1 more source

Partitioning of non-coaxiality in deforming layered rock masses

Tectonophysics, 1992
Abstract Partitioning of non-coaxiality and other flow parameters in deforming layered rock masses with nearly incompressible Newtonian rheology is examined in two dimensions by the finite element method. The results show that layers with viscosity contrast in suitable orientation deform by different and even by a reverse sense of non-coaxiality ...
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Equivalent elastic moduli of a rock mass consisting of orthorhombic layers

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1982
Abstract A stratified rock mass is considered to consist of a series of parallel layers each of which has orthorhombic elastic properties. When the thicknesses and properties of the layers vary with depth in either a random or systematic repeated fashion it is shown that the layered rock mass can be represented by an ‘equivalent’ homogeneous ...
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Finite element analysis of Cosserat Theory for layered rock masses

Computers and Geotechnics, 1993
The excavation problem in a periodically layered plane due to an arbitrary in-situ stress field has been analyzed by the Cosserat finite element approach, using 8-node isoparametric elements. Special emphasis is given to the case when the shear modulus of one type of layer is much smaller than that of the adjacent layers.
Dai, C., Muhlhaus, H., Duncan Fama, M., Meek, J.   +3 more
openaire   +3 more sources