The Evolution of Geotech - 25 Years of Innovation

Keynote Lectures

Reflections on 40+ years of rock engineering practice in mining

W.F. Bawden

Recent Advances in Seismic Soil Liquefaction Engineering

K.O. Cetin & H. T. Bilge

Advances in data-driven subsurface mapping

K-K Phoon & J. Ching

After decades of rock engineering modelling, are we asking the right questions?

M.S. Diederichs

Position Papers for Panel Discussion 1

Comprehensive Slope Monitoring Program for Managing LargeScale Instabilities: A Contribution to "From Monitoring and Calibration to Predictive Modelling"

N. Coli

Position Paper for "From Monitoring and Calibration to Predictive Modelling" Panel Discussion - Thoughts on Instrumentation/Monitoring and Numerical Model Calibration

W.F. Bawden

Panel Discussion: From Monitoring and Calibration to Predictive Modelling – Continuously Improving Models with Monitoring Data

N. Bar

Real-Time Data Collection from InSAR is Coming Soon: A Contribution to "From Monitoring and Calibration to Predictive Modelling" Panel Discussion

D. Colombo

Position Papers for Panel Discussion 2

Position Paper on Numerical Modelling: Perspectives from Technical Support on User Models

B. Corkum

Position Paper on Numerical Modelling: Philosophy

J. Carvalho

Position Paper on Numerical Modelling: Numerical Modelling Philosophy

T. R. Stacey

Position Paper on Numerical Modelling: Challenges in Tailings Dam Models

T. Bretas

Technical Sessions

Session 1 - Rock Mass Characterization:

Towards improved definition of the Hoek-Brown constant mi for numerical modelling

T.G. Carter

Study of the Effect on Stability of Slope Variations and Reserve Estimation in the Kaolin Mining Quarry Design

I. Chusna, N.R. Mulyaputra, V. Vergiagara & H. Suharyadi

How to incorporate variability of rockmass structures into equivalent continuum numerical models using the Composite Geological Strength Index

J. Day

Rock Mass Characterization of Molasse-like Deposit of Dahor Formation and Its Application To Rock Slope Stability From Bunati Area, South Kalimantan: A Preliminary Study

L. Zeremy

Session 2 - Tunnels & Caverns I

Brittle failure assessment for TBM tunneling under high overburden: A case study from Pahang-Selangor Raw Water Transfer Tunnel Project, Malaysia `

H.H. Shaalan, M.A.M. Ismail, R. Azit & I.N. Yusof

Use of continuum and pseudo-discontinuum FEM models in stepwise verification of the FDEM for simulating damage around tunnels in brittle rock

S. Markus & M. Diederichs

Numerical investigation of the relationship between the inflow rate to the tunnel, block volume and block surface area

A. Shahbazi, A. Saeidi & R. Chesnaux

Severe rockburst occurrence during construction of a complex hydroelectric plantG. Russo

Session 3 - Stability Analysis of Mining Slopes IA

nalytical versus numerical analysis on slope stability of surface lignite mines

A. Mikroutsikos, A. Theocharis, N. Koukouzas & I. Zevgolis

Practicalities when adopting a gradational damage factor within a Hoek-Brown constitutive model

P. Edmondson & V. Pere

Open pit 3D slope stability for anisotropic rock masses in soft iron ore deposits – A case study

L.T. Figueiredo, R. Hammah, Y. Santos, T. Souza & C. Nogueira

Comparison of the probabilistic and deterministic slope stability analysis of a dolomite quarry in HungaryG. Bögöly & F. Füzesi

Session 4 - Probabilistic Slope Stability Analysis I

Considering multiple failure modes: a comparison of probabilistic analysis and multi-modal optimization for a 3D slope stability case study

B. Cami, T. Yacoub, T. Ma, B. Corkum & S. Javankhoshdel

Assessment of asperities geometry influence on MSW landfill critical interface side-slope stability using probabilistic analysis 199

D.D. Adeleke, D. Kalumba, L. Nolutshugu & J. Oriokot

Schematization of Soil Properties in Mathematical Modeling of Slope StabilityI. Fomenko

Session 5 - New Technologies in Geotechnical Engineering

Artificial intelligence and image processing in the MIRET approach for the water detection and integrated geotechnical management of existing mechanized tunnels: methodology, algorithm and case study

F. Foria, D. Cuccato, M. Calicchio, S. Rinaldo, A. Tarquini, & G. Bomben

An integrated geotechnical risk management approach using cloud-based risk assessments, artificial intelligence, satellite monitoring and drone technology

J. Strydom

Remote sensing and mapping of geological rock-mass features employing advanced data analytics and artificial intelligence.

S. Amvrazis, J. Patzelt, C. Binder, M. Smesnik & A. Freuis

Tunnel liner yield forecasting at Cigar Lake Mine: an Input Omission approach to understanding machine learning processesJ. Morgenroth, M.A. Perras & U. T. Khan

Session 6 - Surface Excavations

Evaluation of theoretical liquefaction of compacted tailings piles based on the state parameter approach: a case study

E. O. Muguet & R. Silva

Lessons Learnt from 3D Soil-Structure Modeling of a Peanut Shaped Cofferdam for Cut & Cover Tunnel

A.K.L. Kwong

Field instrumentation based performance verification of an improved soil siteA. Yunatci, H. Bilge, E. Çakır & Y.U.　Doğan

Session 7 - 3D Slope Stability Analysis

Finite element analysis of a deep excavation: A case study ground response due to deep excavations in Sydney Sandstone

M. Kitson & M. Kitson

North wall stability analysis of Vasilkovskoye open pit Kazakhstan

D. Dossymbek & S. Mortazavi

3-D stability analyses in soft clays with strain-softening

M.P. Pacheco & M. Pacheco

On the comparison of 2D and 3D stability analyses of an anisotropic slopeA. McQuillan, N. Bar & T. Yacoub

Session 8 - Numerical Slope Stability Analysis I

Numerical profile modeling for transient groundwater flow at pit slope

E. Leonteva & R. Sapachev

Soil-Structure Interaction of Mechanically Stabilized Earth (MSE) Retaining Walls Subjected to Construction Sequencing and Seismic Loading

L.L. Clemente, G.P. Ventura & PE.B. Quinay

2D and 3D Numerical Study of Geosynthetic Mechanically Stabilized Earth GMSE Walls

E.L.A. Montilla, E.R. Esquivel & F.H. Martins Portelinha

2D and 3D FEM modeling of the initiation of progressive landslidesR. Dey & S. Javankhoshdel

Session 9 - Liquefaction & Foundation Analysis

Bearing capacity and settlement analysis of closely spaced shallow foundations with various footing geometry on multi-layered soils

M.E.C. Amorin & G.P. Ventura

Behaviour of Rigid Block on Uniform Sand Under Horizontal Base Acceleration

N. Trbović, V. Jagodnik & N. Čeh

Skin Friction Displacement Relations for Load Settlement Behaviour of Bored Piles in Dubai

A. Mufty

Implementation of Constrained Differential Evolution in Reliability-based Evaluation of Soil-Structure Interactioninfluenced Liquefaction PotentialC.R. Guanzon, G.P. Ventura & A.S. Freire

Session 10 - Stability Analysis of Mining Slopes II

The effect of water filling on slope stability of open pits: a numerical investigation

I. Zevgolis, A. Mikroutsikos & A.I. Theocharis

Geotechnical Analysis of Cut and Fill Mining Sequence on Dumping Materials Re-handling XPit by Using Slide3

P. Handanawarih & Z.I. Munthaha

3D Slope Stability Analysis of a Filtered Iron Ore Tailings Dry Stacking

A.S. Freire, T.C. Bretas, T.B.G.　Moreira & M.C.　Medeiros

Slope Angle Optimization Applied for Geometry Design Of An Open Pit Iron Ore MineM. C. Medeiros, B.A. Alemão, M .A.P. Guimarães, T.C. Bretas, F. F.M. Vilela, T.B.G. Moreira

Session 11 - Probabilistic Slope Stability Analysis II

Back Analysis For Landslide In Mine Waste Dump Slope Using Probabilistic Analysis

G. Firmanda, A. Gemas & P. Nayoan

Reliability analysis of soil nail walls using SRV and RLEM approaches

S.M. Asadollahi, M. Rezvani, A. Fakher & S. Javankhoshdel

Probabilistic slope stability analysis of a case study using Random Limit Equilibrium Method and Surface Altering Optimization

S. Javankhoshdel, T. Ma, B. Cami, R.J. Chenari & T. Yacoub

Simulating the topography induced stresses using 3D numerical modelingW. Ali & R.A. Abdullah

Session 12 - Numerical Slope Stability Analysis II

Consistent evaluation of slope safety factors between different strength criteria

J. Clausen

Global Stability Assessment of Open Pit Slopes Using LEM and FEM: A Comparison between the Factor of Safety and Strength Reduction Factor

J. Goodale & B. Fisher

A simple method to model buckling slope instability using continuum numerical models

R. Ridl, D.H. Bell, M.C. Villenueve & D.F. Macfarlane

Interaction of Twin Tunnels within Weak Rock Masses and SlopesI. Vazaios & N. Vlachopoulos

Session 13 - Tunnels & Caverns II

The probabilistic analysis of steep lakeside slopes; geotechnical-geological-hydrogeological constraints and numerical analysis, an example from Hungary

F. K. Nagy-Göde & Á. Török

Weathered Rock and Crack Detection of Tunnel Excavation using Image Analysis

I.N. Yusoff, T. Miyoshi, M.A.M. Ismail, K. Date, H. Tobe & Y. Yokota

Numerical investigation of the stability of tunnel excavation faces in deep tunnels

D. Georgiou, M. Kavvadas & A. Kalos

A numerical investigation on the influence of rockmass parameters and yield mechanics in pillar designE.J. Dressel & M. Diederichs

Session 14 - Stability Analysis of Mining Slopes IIIC

ontinuous Wall Stabilization of Impoundment Slopes

W. Carswell, L.C. Barlow & D.R. Siebert

Landslide Hazard and Risk Level Assessment of Quarried Slopes in Lebanon using Drone Imagery

R. Kaafarani & G.A. Jaoude

Back-analysis of ductile slope failure mechanisms and validation with aerial photogrammetry, InSAR and GbRAR to proactively manage economic risks to protect the mine plan

N. Bar, L.A. Mosquea, M. Arrieta, B. Mojica, A. Espino, A. McQuillan, C. Diaz, G. Baldeon, G. Falorni

Comparison between GSI-based implicit and explicit structure modelsC. Fischer & M.S. Diederichs

Session 15 - Spatial Variability in Probabilistic Slope Stability Analysis

Probabilistic analysis of geosynthetic reinforced slopes using 2D and 3D models

P. Dastpak, B. Cami, D. Dias, S. Javankhoshdel & R.J. Chenari

A stochastic spatial modeling approach for pit slope stability analysis using 3D Limit Equilibrium Analysis

F. Cudjoe & K. Esmaeili

Developing spatially constrained Discrete Fracture Network (DFN) models for a stochastic pit slope stability analysis

Y. Zhao , K. Esmaeili & J. Ran

Probabilistic Analysis of an Open Pit Mine Slope in the Central African Copperbelt with Spatially Variable StrengthsS. Cylwik, S.B. Cox & J.J. Potter

Session 16 - Numerical Analysis of Underground Excavations

Options for designing a hold-retain strategy for excavations in stratified rock

R. Seedsman

The fast multipole method for the computation of large-scale three-dimensional elastostatics boundary-element problems in underground excavations

H. Wahanik, S. Moallemi, J.H. Curran & T. Yacoub

Life-of-mine deformation　and　stability assessment for　Kibali　conditions in　Western 9000 series lodes 569　　

G. Kaleba

Numerical　models　for　the　design　and　construction　of　new　underground structures at CERN　(HL-LHC),　Point　5D. Merlini, M. Falanesca, G. Bella, R. Schürch, F. Gianelli, A. Luz Lopez- Hernandez

Session 17 - Stability Analysis of Jointed Rock Slopes

Modelling the effectiveness of a grout curtain for construction groundwater control in Karst for a lock excavation

V. Bateman

Application of discrete fracture networks (DFN`s) to the design of benches in an open pit mine in South Africa

V. Kuppusamy

Comparison of 2D-3D limit equilibrium and finite element methods for the analysis of bi-planar rock slope failures

Y.U. Doğan & N.S. Isik

On the use of Extended Finite Element Method (XFEM) for jointed rock slope problemsS. Moallemi, T. Yacoub, T. Yee, B. Corkum, D. Qi & J. Curran

Session 18 - Limit Equilibrium Slope Stability Analysis

Mitigation measures for the protection of working railway lines from landslides: the case study of Altare and Santuario

F. Foria, R. Giordano & G. Cordua

Can 2D cross sections be safely extrapolated?

C. MacRobert, T. Mutede & N. de Koker

Characterization and stabilization of a mine waste dump-landslide

E. Türk, S. Oguzhan & Ö. Dumanlilar

Case study – Development of a practical design for a landslip site using advanced geotechnical software.

D. Egan, A.Zaharescu & I. Williams

Biography

Dr. Reginald Hammah, P.Eng., is the Rock Mechanics Lead (West Africa) in the Accra office of Golder Associates. He has a strong background in numerical modelling and application of software tools to geomechanics problems, including stress and stability analysis of slopes and underground excavations. He is also very experienced in the use of probabilistic and risk assessment techniques in geotechnical analysis. Dr. Hammah graduated with a Masters degree in Structural Engineering from the Zaporozhye Industrial Institute in the Ukraine in 1993. He immediately went to Canada to pursue further studies and obtained his Ph.D. in Rock Mechanics from the University of Toronto in 1998. In December 1998, Dr. Hammah joined the Mine Waste Group in the Mississauga office of Golder Associates. He later moved to the Sudbury office as a Rock Mechanics Specialist. In 2000 he joined a team of professors at the University of Toronto to help apply for a major research grant from the W.M. Keck Foundation. Dr. Hammah served as research manager for the Lassonde Institute that was born out of this grant. He was also the Technical Co-Chair for the 2002 North American Rock Mechanics Symposium. Thereafter Dr. Hammah moved over full-time to Rocscience Inc. He participated in the development of programs such as Phase2, Slide and RocData. He also helped develop and teach several Rocscience training courses and seminars. Dr. Hammah rejoined Golder Associates in 2010 to help the company grow its business in Africa.

Dr. Thamer Yacoub, P.Eng. is the CEO & President of Rocscience. He has more than 25 years of experience in geomechanics numerical modeling. Thamer has a wide range of experience in several numerical modeling applications, covering topics including slope stability analysis, settlement and foundation analysis, surface and underground stress analysis. He also has extensive experience in probabilistic analysis of slopes. Thamer received his Bachelors and Masters degrees in Civil Engineering in 1986 and 1990 from the University of Baghdad in Iraq. He then obtained his Ph.D. degree in numerical geomechanics from the University of Toronto, Canada in 1999. Thereafter, Thamer joined Rocscience Inc. as a geomechanics specialist in 1999. Thamer was involved in developing the boundary element engine for Examine, and the finite element engine for RS 2. He was also the lead developer for Settle. Thamer has extensive experience in fluid flow analysis and developed the groundwater engine for Slide 2 and RS 2. Ongoing areas of interest include material model development, soil-structure interaction, shear strength reduction, Slope stability analysis, and three-dimensional finite element modeling in RS 3. Thamer has developed and taught several Rocscience workshops and seminars. He is the primary course instructor for both the Rocscience standard short courses as well as the customized course packages. He has presented courses around the world in North and South America, the Middle East, Asia, New Zealand and Australia.

Dr. John Curran is the founder and CEO of Rocscience and Robert Smith Professor Emeritus, Civil Engineering, University of Toronto. Over his 32-year career at the University of Toronto, he taught a wide range of subjects including rock and soil mechanics, soil dynamics, computational geomechanics, and the finite element method. His research focused on the development of boundary element and finite element techniques for 2D and 3D stress analysis of underground excavations including automated 3D finite element meshing techniques. He developed numerical techniques for modeling hydraulically propagated fractures in rock as well as constitutive models for with the anisotropic geomaterials. Most recently, he has been working on developing a rock fall simulator based on rigid body impact mechanics. Dr. Curran obtained his bachelor and master’s degrees in Civil Engineering at the University of Toronto and completed his Ph.D. in Mechanical Engineering at the University of California, Berkeley in 1976. He became an assistant professor in Civil Engineering at the University of Toronto in 1977 and became the 1st holder of the Robert M. Smith Chair in Geotechnical Analysis and Mine Design in 1996. He started Rocscience Inc. in 1996 as a spin-off company from his research group at the University of Toronto, a company that has been very successful in the technology transfer of academic knowledge to the working engineer, in the form of fast and easy to use software