Abstract
Stratified rock mass is a common rock mass structure and distributed widely on the earth’s crust. High-density distribution of stratified structural planes in the stratified rock mass has a great influence on the mechanics properties of the rock mass, such as anisotropy of stress and seepage. Therefore, anisotropy is the inherent characteristic that must be considered in the stratified rock mass as well as the stratified rock slope stability. According to the anisotropic characteristics of stratified rock mass, an anisotropic seepage-stress coupled model for the mechanical behavior of stratified rock slope is proposed based on the anisotropy elasticity theory. The model is validated by simulating seepage and stress fields of an idealized slope using the finite element method. The deformation and stress-dependent permeability of the slope are predicted and compared well with the previous study, thus confirming its capability in characterizing the response of rock slope that is dominantly affected by rock anisotropy. Finally, the model is used to simulate the anisotropic properties of a stratified rock slope of Fushun west open-pit mine, China. The simulation is in good agreement with the actual measurement, which means the proposed model is capable of simulating anisotropic properties of the stratified rock slope.
Highlights
Open-pit mining is the most important technology for extracting mineral resources from the earth’s crust
In open-pit mines, the economic benefits and total minable reserve are severely influenced by rock slope stability which is affected by different uncertainties arising from many sources. e slope rock mass that contains multiple structural planes has a certain structure, such as stratified structure, which is very common and distributed widely in the earth’s crust. ese stratified structural planes are primordially distributed in stratified rock mass
When such rock strata are excavated by open-pit mining, the stability of stratified rock slope will be an inevitable problem for the engineering. e stratified structural plane leads to the heterogeneity and anisotropy of rock mass and affects the failure mode of rock slope. erefore, it is of great significance to characterize these structural planes and quantify their effect on the mechanical response of rock slope in order to evaluate the rock slope stability
Summary
Open-pit mining is the most important technology for extracting mineral resources from the earth’s crust. Ese stratified structural planes are primordially distributed in stratified rock mass When such rock strata are excavated by open-pit mining, the stability of stratified rock slope will be an inevitable problem for the engineering. Mathematical Problems in Engineering which is not accurate for the stress-controlled landslide [6] In this respect, the finite element method (FEM) which makes up the insufficiency has become popular for slope stability analysis due to its simplicity and feasibility. E discontinuous deformation analysis (DDA) proposed by Shi [11] is internationally recognized in effectively quantifying the response of every structural planes in the rock mass, obtaining a good application in practical engineering. In order to further verify the engineering applicability of the proposed model, a stratified rock slope of Fushun west openpit mine is simulated using the model. e simulations are in good agreement with the actual measurements. is study may provide reference for more accurate analysis of the mechanics behavior of the stratified rock slope
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