Proceedings of the TMIC 2022 Slope Stability Conference (TMIC 2022)

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22 articles
Proceedings Article

Peer-Review Statements

Sina Javankhoshdel, Yousef Abolfazlzadeh
Proceedings Article

Novel Approach for Particle Size Distribution Analysis. Applied Case to Rockfills and Waste Dumps Using Unmanned Aerial Vehicle (UAV)

Marco Arrieta
This paper describes the workflow and results for Particle Size Distribution (PSD) analysis using UAV photogrammetry for waste rockfill materials. A methodology for digital detection and statistical measurement of PSD derived from UAV-SfM photogrammetry is presented. The comparative results between field...
Proceedings Article

Analysis of Deformations of Gravel Columns in Tailings Dams Using the Finite Element Method and Constitutive Equations

Kely Lara, Roxana Mamani, Jorge Cárdenas
In this research, the analysis of the deformations of the gravel columns applied in the foundation of the dam’s regrowth of the centerline method is developed. The purpose is to guarantee its stability against the potential liquefaction phenomenon induced by a seismic event, construction and external...
Proceedings Article

Comparative Analysis of the Effect of Disposal in Tailings and Waste Rock Piles

Michel Moreira Morandini Fontes, Edna Lizeth Ardila Montilla, Anderson Nascimento Milagres, Gladys Hurtado Aquino, Vanessa Cristina Justino
The disposal of tailings currently represents a major challenge in the Brazilian mining scenario. As a result of the accidents that have occurred in the last decade, the legislation has become increasingly demanding with regard to the disposal processes of these materials. Therefore, new disposal systems...
Proceedings Article

Tailings Dam’s Safety Assessment Considering Undrained Foundation Failure

Flávia Augusta Padovani, Thiago Bretas
During construction and raising phases of tailings dams, excess pore pressures and localized deformations (plasticization zones) may develop due to applied overloads. Therefore, it can develop an undrained shearing in contractile materials, as tailings and foundation soils. In this case, the design of...
Proceedings Article

Probabilistic Assessment of Reinforced Soil Walls Using Fourth Moment Normal Transformation

Ekansh Agarwal, Anindya Pain, Annan Zhou
Fourth Moment Normal Transformation (FMNT) is an efficient method to probabilistically scrutinize the stability of reinforced soil walls (RSW). The methodology doesn’t require the assumption of the distribution of involved random variables to estimate the probability of failure (Pf) and subsequently...
Proceedings Article

A New Stochastic Response Surface Method in Spatial Variability Slope Stability Analysis

Sina Javankhoshdel, Thomas Zeger, Brigid Cami, Helmut Wahanik, Terence Ma
Spatial variability is becoming more and more common in limit equilibrium slope stability analysis. With the recent advances in the abilities for limit equilibrium slope stability analysis to handle complicated models, it is more important than ever to have a fast and accurate method to perform slope...
Proceedings Article

Probabilistic Analysis of a Slope Using RLEM and Cross-Correlated Conditional Random Field

Sina Javankhoshdel, Elahe Mohammadi, Reza Jamshidi Chenari, Terence Ma, Brigid Cami, Meghdad Payan
Probabilistic analyses of slopes using Random Limit Equilibrium Method (RLEM) have been extensively reported in literature. However, in these types of analyses, the generated random fields are based on assumed values of horizontal and vertical correlation lengths. In practice, horizontal and vertical...
Proceedings Article

Meaningfulness of the Stable Range of Factor of Safety for Deep Pits – A Numerical Modelling Assessment

Mahdi Zoorabadi, Mojtaba Mousakhani
Limit Equilibrium (LE) methods have been used as the main tool to assess rock mass failure mechanisms at inter-ramp and overall slope scales in open pit mines. Rock mass shear strength parameters are determined by reducing the intact strength using Geological Strength Index (GSI), Damage factor (D),...
Proceedings Article

Numerical Modelling for Improved Open Pit Optimization

S. J. Jackson
Simple open pit optimization using industry standard approaches (e.g. Whittle or NPV scheduler) provides a range of pit shells for an engineer to evaluate and select an optimal pit, and/or interim push backs to which a mine design can be developed. The first optimization step requires the definition...
Proceedings Article

The Warm Blanket of Geotechnical Databases and the Reality of Rock Mechanics

Julian Watson, Antonio Verduzco Mendez, Patricia Robertson
The limited success of simplified slope stability assessment tools and concerns related to slope performance resulted in a review of an open pit mine located in South Western United States. 3D numerical was used to assess the LOM design which led to improved slope stability, while maintaining key safety...
Proceedings Article

Effect of Seawater on the Mechanical Strength of Geopolymer/Cement Stabilized Sandy Soils

Parisa Samadi, Ali Ghodrati, Pooria Ghadir, Akbar A. Javadi
Freshwater supply for stabilizing sandy soils is one of the significant challenges in coastal regions. On the other hand, Ordindary Portland cement (OPC) has several limitations in the exposure to saline environments. Geopolymers, as environmentally friendly soil stabilizers, have been widely used in...
Proceedings Article

Optimization of Spline Slip Surfaces Using Metaheuristic Search in LEM

Terence Ma, Brigid Cami, Sina Javankhoshdel, Brent Corkum, Thamer Yacoub
The search for the critical slip surface on a slope is an optimization problem whereby the factor of safety is minimized over a set of parameters which define the shape of the slip surface. In limit equilibrium slope stability analysis, traditional methods for searching for the critical slip surface...
Proceedings Article

Investigating Sub-soil Moisture Variation of Engineered Turf Cover for Landfills Through Field Instrumentation

Md. Jobair Bin Alam, Maalvika Aggarwal
Understanding the moisture distribution pattern and associated suction variability of soil in response to environmental loading (e.g., precipitation, temperature) is important. However, there is a lack of understanding of the spatial variability of moisture and suction in different final cover systems....
Proceedings Article

Slope Stability, Performance and Berm Design of Small Arms Ranges for the Canadian Armed Forces

Richard LeBlanc, Maria Skordaki, Nicholas Vlachopoulos
The soil berm stop butt used to arrest bullets behind targets of Canadian Armed Forces Small Arms Ranges (SAR) infrastructure presents a geotechnical opportunity for optimization. Existing pre-emptive monitoring of the berms over the past decade has established multiple modes of failure. Previously,...
Proceedings Article

Comparison Between Newmark Time History Analysis and Finite Element Method for Estimating Seismically Induced Slope Displacement

Mahir Badanagki, Feng Li, Christian Armstrong
Estimating the seismically induced slope displacement is important in assessing the stability and relative deformation of slopes during earthquakes. The Newmark time history analysis (also known as Newmark displacement analysis) bridges the gap between the simplified pseudo-static method and complex...
Proceedings Article

Spatial Variability of Input Motion in Stochastic Slope Stability

Pooneh Shah Malekpoor, Susana Lopez-Querol, Sina Javankhoshdel
The slope stability has been widely analysed in the past, which demonstrates the significance of the subject in human life, especially in terms of life safety and economy. This is even more important in earthquake-prone areas where statically stable slopes may be triggered by the dynamic loads. Pseudo-static...
Proceedings Article

Probabilistic Assessment of Seismic Bearing Capacity of Strip Footings Seated on Heterogeneous Slopes Using Finite Element Limit Analysis (FELA) and Response Surface Method (RSM)

Hessam Fathipour, Sina Javankhoshdel, Yousef Abolfazlzadeh, Meghdad Payan, Reza Jamshidi Chenari
The paper demonstrates the use of the response surface method (RSM) to carry out probabilistic assessment of the seismic bearing capacity of shallow footings seated near naturally occurring heterogeneous slopes. To this end, a pseudo-static loading is applied to a randomly uniform slope, which is homogeneous...
Proceedings Article

A Case Study on the Use of Expert Selected Set Method in the Reliability Analysis of an Urban Deep Excavation Project

Ali Fakher, Arefeh Arabaninezhad, Minoo Nikghalbpour
The necessity of constructing structures beneath ground level, increases the need of performing deep excavations in urban areas. It is essential to have a reliable estimation about the performance of deep excavation systems. This approach is not accessible via common deterministic analysis methods, since...
Proceedings Article

Tailings Dam Reservoir Sectoring Using CPTU and Geophysical Test Data

Amanda Souza, Bruno Novais, Michel Fontes, Naiala Fidelis
The need for stabilization of a dam located at Quadrilatero Ferrifero, located at the Southern of Craton São Francisco, in Brazil, demanded geological-geotechnical studies that made possible the building of a geological model that reflects the behavior and distribution of sediments deposited within the...
Proceedings Article

Ground Forecasting in Mechanized Tunneling

Saadeldin Mostafa, Rita L. Sousa, Herbert H. Einstein, Beatriz G. Klink
The construction of TBM tunnels is associated with high uncertainty due to the unknown ground conditions surrounding the TBM. Recently, there have been several attempts to make use of the large amount of TBM data recorded during construction to predict the ground conditions and automate the tunneling...
Proceedings Article

EPBM Advance Rate Prediction Using Hybrid Feature Selection and Support Vector Regression Modeling

Shengfeng Huang, Misagh Esmaeilpour, Pooya Dastpak, Rita Sousa
Advance rate (AR) prediction is crucial for optimal mechanized tunneling performance. However, the type of input features used when developing AR prediction models vary greatly from study to study. In this paper, a hybrid automatic feature selection method is presented and demonstrated through the development...