Wei Victor Liu

Wei Victor Liu
University of Alberta | UAlberta · Department of Civil and Environmental Engineering and the School of Mining and Petroleum Engineering

19.79
 · 
PhD, PEng

About

41
Publications
6,652
Reads
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114
Citations
Introduction
Victor is a Professional Engineer registered in Alberta and an Associate Professor of Mining Engineering at the University of Alberta, Edmonton, Canada. Before joining the academia, he worked as a geotechnical engineer in Canada’s Arctic Region, focusing on Arctic mining projects composed of rock/soil mechanics, ground freezing, and geothermal modeling. His research interests include dust control, bulk materials handling, development of cement-based materials, and thermal-mechanical modeling.
Research Experience
July 2020 - present
University of Alberta
Position
  • Associate Professor
Description
  • Duties: teach, conduct research, and deliver services. Active research areas are 1) development of sustainable cement-based composites, 2) thermal-mechanical modeling of geo-system, and 3) mine dust control.
September 2014 - June 2020
University of Alberta
Position
  • Assistant Professor
Description
  • Duties: teach, conduct research, and deliver services. Active research areas are 1) development of sustainable cement-based composites, 2) thermal-mechanical modeling of geo-system, and 3) mine dust control.
February 2013 - July 2014
Tetra Tech
Position
  • Geotechnical Engineer
Description
  • Duties: design and undertake construction monitoring of civil and mining components for large mining sites in the Arctic region. Practicing areas include rock/soil mechanics, permafrost, ground freezing, and geothermal modeling.

Publications

Publications (41)
Article
This study aims to explore the possibility of using calcium sulfoaluminate (CSA) cement to prevent early-age frost damage. CSA-based and ordinary Portland cement (OPC)-based mortars with and without calcium nitrate were exposed to −10 °C for 3 days, then re-cured at 23 °C until 28 days. Another group of mortars was directly cured at 23 °C as refere...
Article
Full-text available
It is important to understand the behaviour of voussoir beams in the design of underground excavations. There are a large number of discrepancies between the results obtained by different researchers so far. To resolve these discrepancies, physically testing the stress distribution at the midspan and abutment of voussoir beam is the key. In this pa...
Article
The objectives of this study are to utilize and investigate the performance of molasses as a retarder and plasticizer for calcium sulfoaluminate (CSA) cement and examine the effects of molasses on the hydration reaction, microstructure, and mechanical properties of CSA cement mortar. In this study, experiments were conducted to measure the setting...
Article
The currently available moving finite line source (MFLS) model for design and simulation of vertical borehole heat exchangers (BHEs) neglects the effect of buried depth, i.e., the vertical distance between the ground surface and the BHEs. We propose a new analytical solution of the MFLS model with the buried depth added in a single integral form—it...
Article
Full-text available
The objective of this paper is to investigate the effects of initial particle gradation and rock content on the crushing behavior (i.e. grain size before and after crushing) of weathered phyllite fills. Compaction tests were conducted on weathered phyllite fills with rock contents of 35%, 45%, 55%, 65% and 75% (by weight). First, the particle size...
Article
Deep petroleum wells are often associated with high bottom-hole temperatures and can provide a cost-effective way to produce geothermal energy. The goal of this study is to develop a reliable simulation model to demonstrate the feasibility of extracting geothermal energy with deep coaxial borehole heat exchangers in abandoned petroleum wells in the...
Article
Full-text available
Coal dust is one of the most serious hazards on mine sites. Water spray with surfactant added is an effective way to control the coal dust. In this study, wind tunnel experiments were designed to evaluate the surfactant on coal dust suppression efficiency. A CFD modeling was first constructed in to investigate the coal dust particles movement chara...
Article
Full-text available
One of the most serious mining disasters in underground mines is rockburst phenomena. They can lead to injuries and even fatalities as well as damage to underground openings and mining equipment. This has forced many researchers to investigate alternative methods to predict the potential for rockburst occurrence. However, due to the highly complex...
Article
Foam is an effective material for controlling industrial dust. To optimize and upgrade the performance of dust-suppression foam, this paper proposes a method of exposing the foaming agent solution to a magnetic field of specific intensity prior to foaming. The effects of magnetization on foaming capacity, foam stability and foam size were investiga...
Article
The utilization of polymer stabilizers is a promising method in mitigating bauxite residue (red sand) dust pollution. Its thickening property can effectively bind sand particles by constructing crusts to withstand wind erosion. Previous studies recommended the mixture of polymer solutions for a better dust control performance. However, limited refe...
Article
High production rates and low operating costs highlight block caving as one of the favorable underground mining methods. However, the uncertainties involved in the material flow make it complicated to optimize the production schedule for such operations. In this paper, a stochastic mixed integer linear optimization model is proposed in order to cap...
Article
This study aims to investigate the use of pozzolans–fly ash (FA), metakaolin (MK), and silica fume (SF)—which can be sourced from local mine waste to improve acid resistance of rehabilitation shotcrete. Cement was replaced with these pozzolanic materials at ratios of 5%, 10%, 20%, and 30% to prepare cylindrical samples. These samples were immersed...
Conference Paper
Full-text available
The selection of an elevation for the placement of the undercut level is a decisive initial step in the planning and design of block caving mines. It is key for the success of a caving project to define the undercut elevation that will most likely yield the highest possible net present value (NPV) of the operation, considering the discounting perio...
Article
Full-text available
This paper is intended to conduct a narrative review on the acid corrosion of sewer tunnel concrete in the City of Edmonton-an investigation on the MIC (microbially induced corrosion) mechanism and the potential control methods to improve the sustainability of concrete. Firstly, three categories of main influencing factors were identified for the r...
Article
Full-text available
The mining industry often uses shotcrete for ground stabilization. However, cracking within shotcrete is commonly observed, which delays production schedules and increases maintenance costs. A possible crack reduction method is using expansive shotcrete mixture consisting of calcium sulfoaluminate cement (CSA), ordinary Portland cement (OPC), and c...
Article
Full-text available
The mining industry often uses shotcrete for ground stabilization. However, cracking within shotcrete is commonly observed, which delays production schedules and increases maintenance costs. A possible crack reduction method is using expansive shotcrete mixture consisting of calcium sulfoaluminate cement (CSA), ordinary Portland cement (OPC), and c...
Article
This study established numerical modeling using COMSOL™ to examine the influence of horizontal location and drainage ability of surface borehole on spontaneous combustion in longwall working face gob. Rescaled Range Analysis (R/S analysis) was employed to investigate the chaos characteristic of N2/O2 ratio from a surface borehole in 10416 working f...
Article
Full-text available
The objective of this study is to investigate the role of different atmospheric temperature on the effectiveness of chemical suppressants to control mine haul road dust. In this study, water and selected chemical surfactants-salt, chloride free agents, polymers, and molasses-were tested experimentally for their dust retention efficiency under three...
Conference Paper
Full-text available
The current trend of deeper and lower-grade deposits makes open pit mining less profitable. Mass mining alternatives have to be developed if mining at a similar rate is to be continued. Block cave mining is becoming an increasingly popular mass mining method, especially for large copper deposits currently being mined with open pit methods. After fi...
Article
Full-text available
Predicting the stability of open stopes can be a challenging task for underground mine engineers. For decades, the stability graph method has been used as the first step of open stope design around the world. However, there are some shortcomings with this method. For instance, the stability graph method does not account for the relaxation zones aro...
Technical Report
Full-text available
Microbially induced corrosion (MIC) is occurring throughout concrete sanitary tunnels in Edmonton. It is reported that up to 20% of sanitary sewer pipes are in poor condition. The City of Edmonton (COE) is seeking possible methods to control the corrosion. To that end, a joint Sustainability Scholars Program was initiated between the COE and the Un...
Conference Paper
A large-scale wildfire had broken out at Fort McMurray in Alberta, Canada during May 2016. Many oil sands mining activities were affected due to the wildfire and the associated ash emissions. In particular, ash emission generated from the fire outbreak is a huge problem during the post-fire cleanup. These emissions pose a severe health hazard to wo...
Article
Full-text available
Fast drainage is a key in balancing coal bed methane (CBM) control and coal fire prevention in highly gassy and spontaneous combustion-prone longwall faces in the initial mining range. In this case study, two similar working faces, the 15202 and 15203 faces of Shigang Mine, were studied for the CBM emission history and its control strategy in the i...
Article
Purpose The trapped geothermal heat in the infinite rock mass through which mine tunnels are excavated is a great threat to the safety of personnel and mine operating equipment in deep underground hot mines. In order to lessen the temperature inside the tunnel a considerable amount of energy is being spent by the way of using ventilation and coolin...
Article
The heat flow generated from the infinite rock mass surrounding the underground tunnels is a major cause for the increasing cooling demands in deep mine tunnels. Insulation layers with lower thermal conductivities on tunnel walls and roof ceilings are believed to supply a thermo-barrier for heat abatement. However, it is found that no systematic th...
Article
Full-text available
This paper describes the thermal properties of lightweight dry-mix shotcrete using expanded perlite aggregate (EPA). Mixes made with different EPA/sand ratios were sprayed through the dry-mix shotcreting technique onto wooden molds to produce panels for mechanical and thermal testing. The density, uniaxial compressive strength (UCS), splitting tens...
Technical Report
http://www.mvlwb.ca/Boards/WLWB/Registry/2012/W2012L2-0001/W2012L2-0001%20-%20Ekati%20-%20WROMP%20-%20Version%204.1%20-%20May%205_14.pdf
Chapter
Full-text available
As the demand for minerals increases over the world, mining reaches new depths. As a result, one has to contend with increasing temperatures in working areas due to geothermal heat trapped in the surrounding rocks. One consequence of this is an escalating cost related to ventilation and cooling systems in order to keep the working environment comfo...
Conference Paper
Full-text available
This paper describes the thermal properties of lightweight dry-mix shotcrete using expanded perlite aggregate (EPA). Mixes made with different EPA/sand ratios were sprayed through the dry-mix shotcreting technique onto wooden molds to produce panels for mechanical and thermal testing. The density, uniaxial compressive strength (UCS), splitting tens...
Article
Full-text available
This paper aims to investigate the use of expanded perlite in mortar, for further application of shotcrete to thermal insulation of underground mines. Mixes were designed according to the typical proportions of underground shotcrete, with the sand volumetrically substituted by expanded perlite. Tests of samples were conducted at four ages. Transien...

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Projects (5)