Bre-Anne Louise Sainsbury

Bre-Anne Louise Sainsbury
Deakin University · School of Engineering

Professor (Geomechanics)

About

53
Publications
40,953
Reads
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551
Citations
Citations since 2016
32 Research Items
459 Citations
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
Introduction
Bre-Anne Louise Sainsbury is a Professor (Geotechnical Engineering) at Deakin University (Australia). Her expertise is geomechanics of rock masses.
Additional affiliations
January 2021 - present
Deakin University
Position
  • Professor
February 2018 - January 2021
Deakin University
Position
  • Professor (Associate)
January 2015 - January 2018
Monash University (Australia)
Position
  • Managing Director
Education
January 2009 - December 2012
UNSW Sydney
Field of study
  • Geomechanics
January 2000 - February 2002
UNSW
Field of study
  • Geomechanics
January 1996 - December 1999
RMIT University
Field of study
  • Geological Engineering

Publications

Publications (53)
Article
Full-text available
Anisotropic rock masses, the behavior of which is dominated by closely spaced planes of weakness, present particular difficulties in rock engineering analyses. The orientation of discontinuities relative to an excavation face has a significant influence on the behavioral response. At the present time, discontinuum modeling techniques provide the mo...
Article
MEMS-based instruments have become more attractive in recent years for many industries, particularly geotechnical monitoring owing to their small size and low capital cost. However, overcoming nonlinearity errors is a major concern to ensure accuracy, precision, and repeatability of measurement. Nonlinearity error in measuring instruments can be so...
Conference Paper
Full-text available
Pore water pressure monitoring is an important task in mining and civil engineering projects. The success of monitoring results is partly driven by the reliability and performance of the installed instrument in terms of simplicity, accuracy, conformance, precision, stability, and installation process. Despite recent developments in sensing technolo...
Article
In-situ monitoring is an important aspect of geotechnical projects to ensure safety and optimise design measures. However, existing conventional monitoring instruments are limited in their accuracy, durability, complex and high cost of installation and requirement for ongoing real time measurement. Advancements in sensing technology in recent years...
Conference Paper
Full-text available
It is known that in addition to the production schedule, a number of orebody, geologic and topographic features can influence the nature and extent of surface subsidence related to a cave mine. Some of these factors include the shape and depth of the orebody/extraction level in plan, strength of the rock mass including the intact blocks, joints and...
Article
A novel large-scale geomechanical laboratory testing program is developed to provide full characterization of the strength and deformational response of cemented rockfill (CRF) material for use in exposure stability analyses. Uniaxial compressive strength (UCS), direct shear, and three-point bending tensile tests are performed on large-scale sample...
Article
Full-text available
A dual-support smoothed particle hydrodynamics (DS-SPH) method is developed to quantify explosion-generated crack densities within granitic rock masses in field-scale computational domains. In DS-SPH framework, coupled Eulerian total Lagrangian formulations, along with interface treatment between solid and inviscid fluid particles are fully conside...
Article
Full-text available
Mechanisms via which the presence of geological discontinuities (e.g., faults, geological contacts, etc.) may arrest or divert strain-burst related failures of rock masses have been investigated using numerical simulations. The magnitude of energy release has been considered through an estimate of differential displacements and principal stress con...
Article
Within a well-established stress environment and with well-established laboratory properties, Hawkesbury Sandstone in the Sydney region of Australia hosts, and will continue to do-so, a significant proportion of the underground infrastructure. In order to conduct the most rigorous geotechnical design, it is recognized that the impact of scale on th...
Article
Full-text available
Purpose This research study aims to develop regular cylindrical pore network models (RCPNMs) to calculate topology and geometry properties of explosively created fractures along with their resulting hydraulic permeability. The focus of the investigation is to define a method that generates a valid geometric and topologic representation from a compu...
Article
Existing rockburst evaluation techniques are empirical in nature which limit their use to situations where seismic monitoring data is available. The proposed technique outlined herein is intended to be most useful to consider the risk of strain-burst events when seismic data is not available, e.g. during pre-feasibility or feasibility stage studies...
Article
This study identifies adaptation needs and proposes adaptation options to manage the impact of future climate change in the Australian uranium industry. The study is focussed on two mines - the Ranger and Olympic Dam sites, which represent in excess of 73% of the Australian uranium production. The study employed part of a previous vulnerability ass...
Article
Full-text available
The strength of a rockbolt is one of the key parameters for the design of ground support systems. However, published mechanical performance data by suppliers are usually limited to tensile strength and elongation. To provide additional performance measures, mechanical tests on four commercially available solid reinforcing bar rockbolts have been pe...
Article
In order to assess the severity of a violent brittle failure (strain-burst) around the vicinity of complex underground excavations an index parameter has been developed. The index incorporates measures of the induced stress path and accumulated plastic strain and is calculated after brittle failure conditions are identified by the established Damag...
Article
The ability to assess the proneness of rocks to bursting prior to the development of an underground excavation is critical in order to optimise the design in regards to safety and economics. Six key factors have previously been identified that are known to contribute to rockbursting. They include stress, excavation geometry, excavation rate, minera...
Conference Paper
In general, the violent fracturing and ejection of rock from an excavation face is referred to as ‘bursting’. Bursting is one of the most serious and least understood problems facing deep underground excavations and is extremely hazardous to both workers and infrastructure. The definition of a rockburst varies greatly between countries, companies,...
Conference Paper
For most practical rock engineering purposes, stress versus strength conditions around underground openings for which rock masses fail and their various modes of failure, are reasonably well-understood and predictable. Some rock masses and particular rock types fail slowly and relatively quietly. However, others can fail rapidly, violently and mayb...
Article
Uranium demand is expected to increase due to the worldwide growth in electricity demand and the shift towards more sustainable and reliable low carbon energy sources. For more than 10 years, the Australian uranium industry production (primarily represented by production from the Ranger and Olympic Dam Mines) has been affected by adverse weather co...
Conference Paper
Full-text available
Based on the successful initiation and breakthrough to surface of the PC1 cave at Cadia East, a back-analysis of the performance was conducted to confirm design parameters to optimise the future draw strategy. A mine-scale numerical model was developed to calibrate the existing caving and subsidence behaviour associated with the initiation of PC1 a...
Article
Through a review of selected published case study data from around the world, in situ conditions that contribute to rockburst events have been identified. This review was carried out to assist research associated with developing numerical modelling techniques to reproduce rockbursting within a large-scale (mine models) for predictive purposes. Cont...
Article
Fractures around excavations in hard, fine-grained, brittle rock sometimes display unique patterns from which an interpretation of the manner of failure / fracture propagation can be made. Igneous rock fragments from a strain-burst event at a site in Western Australia have been studied under a Scanning Electron Microscope (SEM) in order to characte...
Article
The application of a small-strain calculation mode in a numerical model is most useful when controlling boundary and applied conditions when large displacements are expected in relation to the grid size. As a result of this calculation mode, modification of the density and bulking/dilational behaviour of the simulated rock mass material during volu...
Article
In block and panel caving, mobilisation of the ore is achieved without drilling and blasting. The disintegration is brought about by natural processes that include the in situ fracturing of the rock mass, stress redistribution, the limited strength of the rock mass and gravitational forces. Sub-level caving requires the transformation of in situ or...
Article
Australia holds 31% of the global uranium resources and currently supplies 12% of the worldwide market. Based on the expected increase in global energy consumption, the demand for uranium is projected to increase, and Australia is well positioned to ensure it remains a significant supplier in the market. However, due to future climate change, the l...
Article
Full-text available
The capacity of ground support components which have been affected by corrosion is reduced and may ultimately lead to dynamic failure of the component and the strata. In order to maintain an effective, long-term ground support system, significant campaigns of rehabilitation are often required in corrosion affected areas which also expose the worker...
Conference Paper
Full-text available
The capacity of ground support components which have been affected by corrosion is reduced and may ultimately lead to dynamic failure of the component and the strata. In order to maintain an effective, long-term ground support system, significant campaigns of rehabilitation are often required in corrosion affected areas which also expose the worker...
Conference Paper
Full-text available
The cave propagation behaviour of a jointed rock mass is strongly governed by the unique nature of joints and discontinuities together with the intact strength of rock-bridges that make up the rock fabric. A Discrete Finite Difference (DFD) modelling technique has been developed to allow for the detailed consideration of the rock mass structural fa...
Article
Full-text available
Anisotropic and foliated rock masses present particular difficulties in the assessment of pit slope stability. Although many attempts have been made to describe the strength of rock masses that exhibit a preferred orientation of weakness, no general methodology has emerged throughout the literature to simulate anisotropic behaviour in a three-dimen...
Article
Full-text available
Microseismic monitoring, the engineering application of earthquake seismology, provides an insight into the location and extent of fracturing induced by the caving process. The spatial characteristics of the observed microseismicity provide valuable validation for the back analysis of the cave process through numerical models (e.g. Pierce et al. 20...
Conference Paper
Full-text available
The capacity of ground support components which have been affected by corrosion is reduced and may ultimately lead to failure of the component and the strata. In order to maintain an effective, long-term ground support system, significant campaigns of rehabilitation are often required in corrosion affected areas. The most common corrosion protectio...
Conference Paper
Full-text available
The established (industry standard) practice to design stable stope spans in jointed rock is to use empirical methods. Experience at a number of open stoping operations has shown that empirical methods can produce unreliable and ambiguous results when applied to particular geological settings. A numerical modelling methodology has been developed an...
Technical Report
Full-text available
Highly skilled engineers drive many Australian industries including mining – a crucial Australian industry - in their pursuit of economic returns around the globe. Understanding the globalised context of Australian mining highlights the challenges of attracting highly skilled engineers to the often remote locations of Australia’s mining landscape....
Conference Paper
Full-text available
Cemented Rock Fill (CRF) has been implemented at the Ballarat Gold Project to allow pillarless recovery of the narrow vein gold deposit. The stoping extraction strategy requires both vertical and horizontal CRF exposures to remain stable and prevent excessive dilution. This paper outlines a program of initial laboratory testing and numerical modell...
Conference Paper
Full-text available
Anisotropic and foliated rock masses, the behaviour of which are dominated by closely spaced planes of weakness, present particular difficulties in the assessment of pit slope stability. Various numerical modelling techniques are available that explicitly simulate the joints and discontinuities within an anisotropic rock mass. However, due to the c...
Conference Paper
Full-text available
A numerical assessment of historical, caving induced subsidence at the Kiirunavaara Lake Orebody has been conducted. Established displacement and strain-based criteria have been used to accurately simulate the evolution of ground surface displacements during a numerical simulation of production from 2003-2010.
Conference Paper
Full-text available
Microseismic monitoring, the engineering application of earthquake seismology, provides an insight into the location and extent of fracturing induced by the caving process. The spatial characteristics of the observed microseismicity provide valuable validation for the back analysis of the cave process through numerical models (e.g. Pierce et al. 20...
Thesis
Full-text available
Cave mining methods allow for the bulk extraction of large, low grade orebodies in a cost effective manner. The fundamental mechanics of caving involves the self-propagating yield (failure) of an in situ rock mass in response to production draw from a mining horizon located at depth. Since the inception of large-scale mechanised cave mining methods...
Conference Paper
Full-text available
Cave mining methods allow for the bulk extraction of large, low grade ore bodies in a cost effective manner. The fundamental mechanics of caving involves the self-propagating yield (failure) of an in situ rock mass in response to production draw from a mining horizon located at depth. Since the inception of cave mining methods in the iron ore mines...
Conference Paper
Full-text available
A numerical approach to cave assessment has been developed over the past 12 years, partly through funding provided by the International Caving Study (ICS) and Mass Mining Technology (MMT) Projects. Recent improvements have been made to the modeling methodology that allows the explicit representation of large, persistent geological structures within...
Article
Full-text available
The Grace Mine, located in southeastern Pennsylvania, USA, was owned and operated by Bethlehem Steel Corporation during 1951–1977. During this time, iron ore was extracted using the underground panel caving mining method that has resulted in significant surface subsidence. Upon recovery of the water table after mining, a lake has formed over much o...
Article
Full-text available
The accurate assessment of cave initiation and propagation is of critical importance to the planning of any new caving operation. For this reason, the use of numerical models for simulation of the undercutting, draw, propagation and surface subsidence processes are becoming more commonplace. This paper describes the application of a numerical cavin...
Conference Paper
Full-text available
The transition from surface to underground mining presents a series of technical and operational challenges, in particular those arising from the interaction between the cave and the overlying pit. Seismic monitoring provides a unique means to obtain near real-time information about the development of the fracturing process induced by the mining op...
Conference Paper
Full-text available
A technique termed Synthetic Rock Mass (SRM) modeling has been developed to study the strength and deformation behavior of jointed rock in three-dimensions. It uses PFC3D to represent the intact rock as an assembly of bonded particles and an embedded Discrete Fracture Network to represent the joints as disc-shaped flaws. This new technique overcome...
Conference Paper
Full-text available
Some of the most challenging aspects of design in moderately to heavily jointed rock masses relate to the impacts of in-situ joint fabric on rock mass behavior. Preferred joint orientations can induce a marked anisotropy in modulus, strength and brittleness. In addition, joint density and persistence must be considered relative to problem size, as...
Conference Paper
Full-text available
Traditional approaches to cave analysis do not provide a means for the robust examination of how key inputs such as fracture orientation and fracture persistence impact rock mass strength and its response to caving. A ubiquitous jointed rock mass (UJRM) technique has been developed to represent rock mass strength anisotropy and scale effects within...
Thesis
Full-text available
The review of present literature has highlighted that significant effort has been placed in the past into developing pillar design criteria based on empirical relationships that do not account for adverse floor conditions. From research conducted over the past decade, it is believed that the geotechnical properties of the strata underlying the coal...
Article
Full-text available
Traditional approaches to cave analysis do not provide a means for the robust examination of how key inputs such as fracture orientation and fracture persistence impact rock mass strength and its response to caving. A ubiquitous jointed rock mass (UJRM) technique has been developed to represent rock mass strength anisotropy and scale effects within...

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Projects (8)