Article
Engineering, Geological
Jun-Hao Zhong, Xiao-Li Yang
Summary: This paper presents a new method for evaluating the stability of rock slopes based on the Hoek-Brown strength criterion, incorporating a rotational failure mechanism and a modified pseudo-dynamic method. The stability of rock slopes is measured through optimization of 21 angle variables and a time variable, with stability charts provided for quick assessment in engineering applications. Comparisons with existing literature validate the rationality and accuracy of the proposed procedure.
Article
Engineering, Geological
Suraparb Keawsawasvong, Jim Shiau
Summary: This study presents an advanced approach to evaluate the stability of Hoek-Brown rock mass with a spherical cavity, using rigorous upper bound and lower bound solutions of stability factors solved through advanced finite element limit analysis. Comprehensive design charts, tables, and equations are provided for stability evaluation.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Di Wu, Xin Chen, Yongchao Tao, Xiaodong Meng
Summary: This study used the tangential method and quasi-static method to investigate the influence of nonlinear parameters, geometric parameters, and earthquake loads on the equivalent Mohr-Coulomb (MC) strength parameters of rock slope. The results showed that the nonlinear parameters have different effects on MC parameters for general steep slopes and vertical slopes, and the effect of slope inclination on MC parameters is significant in fractured hard rock masses. The 3D effect of rock slope on MC parameters was found to be minimal, and the impact of earthquakes on MC parameters becomes weaker for steeper rock slopes. The tables of approximate MC strength parameters provided in this study can serve as references for practical slope engineering.
Article
Environmental Sciences
Alan Showkati, Mansour Sharafisafa
Summary: In this paper, an upper bound solution to the factor of safety (FoS) of an anchor-reinforced rock slope is developed using the Hoek-Brown failure criterion in combination with kinematic approach of limit analysis. Two ways to incorporate the non-linear HB criterion into limit analysis are considered: the tangential technique and the equivalent Mohr-Coulomb parameters method. An optimization scheme is programmed in Matlab to capture an upper bound to the slope FoS by trying all kinematically admissible failure mechanisms. The numerical results show good agreement with other approaches. However, the equivalent method generally overestimates FoS when compared to the tangential technique, meaning that caution should be exercised when using it.
ENVIRONMENTAL EARTH SCIENCES
(2023)
Article
Computer Science, Interdisciplinary Applications
Su-Tang Wang, Xiao-Li Yang, Fu Huang, Qiu-Jing Pan
Summary: The paper presents a method for analyzing the stability of rock slopes in three dimensions, solving the hydraulic head distribution and calculating the seepage forces under steady state hydraulic conditions using numerical methods. The approach is validated through parametric analysis, showing that the safety factor increases with certain parameters but decreases with slope angle and aspect ratio increases.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Engineering, Geological
Z. B. Sun, B. W. Wang, C. Q. Hou, S. C. Wu, X. L. Yang
Summary: This paper proposes a 3D PD method considering the temporal and spatial effects of earthquake input for rock slopes yielding Hoek-Brown criterion. The method is established on a one-block mechanism and the details of the method are elaborated, including failure mechanism, energy balance equation, and solution strategy. The study reveals the significant effects of temporal-spatial variation of seismic input on slope stability.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2022)
Article
Engineering, Geological
Mingming He, Zhiqiang Zhang, Jiwei Zhu, Ning Li
Summary: The study proposes a new model to investigate the relationship between porosity and rock strength ratios, modifying the Hoek-Brown criterion to incorporate porosity instead of constants m(i) and s. Various rock tests show that the modified criterion effectively represents the impact of porosity on rock failure envelopes and can be used to estimate rock porosity and strength parameters.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Engineering, Geological
Dowon Park
Summary: An exact solution for stability measures was derived, which satisfies both equilibrium and compatibility, and was applied to evaluate the stability factor and factor of safety for infinite rock slopes governed by the Hoek-Brown criterion, considering the presence of parallel seepage flow. The generalized Hoek-Brown criterion was directly utilized without typical approximations.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Engineering, Mechanical
Yifan Chen, Hang Lin
Summary: The Hoek-Brown criterion is widely used in various fields. This study investigated the deterioration of Hoek-Brown parameters for freeze-thaw multi-fractured rock mass and proposed a new estimation method based on shear test. The values of GSI and mi were found to decrease with the increase of freeze-thaw cycles, following a negative exponential function model.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Energy & Fuels
Chunguang Li, Cuihua Li
Summary: The fracture angle of Mohr-Coulomb is 45 degrees + φ/2, which is important in soil mechanics. However, the fracture angle of the non-linear Hoek-Brown criterion is not as easily derived. Using physical evidence of no parallel plastic strain in the shear zone, the fracture angle of Hoek-Brown materials is derived as tan-1√1 + m(2√s + mσ3/σc). Experimental and numerical results confirm the agreement between the theoretical and observed fracture angles.
GEOMECHANICS FOR ENERGY AND THE ENVIRONMENT
(2023)
Article
Engineering, Geological
Shenglin Li, Tianlong Ling, Dianshu Liu, Shufeng Liang, Rui Zhang, Bo Huang, Kai Liu
Summary: This study establishes a quantitative method to evaluate the strength and deformation modulus of a rock mass in an excavation-damaged zone (EDZ) using the modified Hoek-Brown criterion. The results show that blasting significantly weakens the surrounding rock mass, reducing compressive and tensile strengths by over 70% and 90% respectively. The study provides an effective approach to evaluate blast-induced damage during rock mass excavation.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Energy & Fuels
Xiangcheng Que, Zhende Zhu, Zihao Niu, Shu Zhu, Luxiang Wang
Summary: Accurate description of the failure strength behaviors of rock materials, including intact rocks and jointed rock masses, is crucial for engineering design and construction. This paper proposes a novel three-dimensional (3D) version of the Hoek-Brown (HB) criterion for intact rocks, which incorporates the effects of intermediate and minimum principal stresses. The proposed criterion is validated and compared with existing criteria, showing the smallest prediction error for most rock types. Additionally, an empirical relationship between the material parameter and joint dip angle is developed for jointed rock masses, with the proposed relation exhibiting the best prediction performance.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2023)
Article
Mining & Mineral Processing
A. Karrech, X. Dong, M. Elchalakani, H. Basarir, M. A. Shahin, K. Regenauer-Lieb
Summary: The parameters and failure criteria that affect slope stability are well understood, but conservative design approaches can lead to excessive overburden removal and jeopardize profitability in open pit mining. Numerical methods are useful for identifying stable zones, but they are approximate and lack the ability to pinpoint critical factors without extensive parametric studies. Existing analytical approaches have not addressed slope stability using non-linear plasticity criteria and three-dimensional failure mechanisms. This paper bridges this gap by utilizing the yield design theory and the Hoek-Brown criterion, while also considering the effect of seismic forces.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Geological
Jian Liu, Quan Jiang, Daniel Dias, Chen Tao
Summary: The study proposes a quantitative expression for determining the geological strength index (GSI) and disturbance factor (D) of the Hoek-Brown criterion by establishing a theoretical relationship between the P-wave velocity of rock mass (V-p) and dynamic elastic modulus (E-md). A probability inversion framework using Bayesian theory is developed to derive the probability distribution of Hoek-Brown criterion parameters. The framework is validated using time-series data obtained from the excavation of the main powerhouse at the Yingliangbao Hydropower Station, showing improved accuracy in predicting excavation deformation.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Engineering, Geological
Guilherme J. C. Gomes, John H. Forero, Euripedes A. Vargas, Jasper A. Vrugt
Summary: This paper discusses the importance of understanding rock anisotropy for reliability analysis and engineering design, and proposes a formulation for calculating strength anisotropy embedded in a Bayesian framework for practical application. The results demonstrate the accuracy of the proposed model in predicting peak strengths of rocks with varying degrees of anisotropy, confining stresses and anisotropy orientations, emphasizing the need for explicit treatment of strength anisotropy uncertainty in rock mechanics studies. The Bayesian methodology is versatile and can assist in informing geotechnical engineers, contractors, and other professionals about rock conditions, design reliability, and overall risks of engineering structures.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2021)
Article
Engineering, Geological
Andy Wilkins, Qingdong Qu
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2020)
Article
Computer Science, Interdisciplinary Applications
Andy H. Wilkins, Andrew Strange, Yi Duan, Xun Luo
COMPUTERS & GEOSCIENCES
(2020)
Article
Engineering, Civil
D. A. Post, R. S. Crosbie, N. R. Viney, L. J. M. Peeters, Y. Q. Zhang, N. F. Herron, A. Wilkins, S. Janardhanan, F. Karim, S. K. Aryal, J. Pena-Arancibia, S. Lewis, T. Evans, J. Vaze, F. H. S. Chiew, S. P. Marvanek, B. Henderson, B. Schmidt, A. Herr
JOURNAL OF HYDROLOGY
(2020)
Article
Water Resources
Christopher P. Green, Andy Wilkins, Jonathan Ennis-King, Tara LaForce
Summary: The geomechanical response of a porous reservoir to fluid injection is complex and can be predicted using simplified analytical models or detailed numerical simulations. The study compares analytical and numerical solutions for fluid and temperature fronts, finding qualitative agreement for some quantities but not others. While the LaForce et al. (2014a,b) solutions are useful for rapid investigation, MOOSE software offers enhancements for more sophisticated analyses and should be preferred.
ADVANCES IN WATER RESOURCES
(2021)
Article
Computer Science, Interdisciplinary Applications
Andy Wilkins, Christopher P. Green, Jonathan Ennis-King
Summary: The study highlights the importance of numerical simulation of transport and flow in porous media in various practical fields, and introduces the development of a physics module for non-isothermal, multicomponent, multiphase flow in porous media using the open-source framework MOOSE. Tight interfaces with existing physics modules allow for fully coupled thermo-hydro-mechanical-chemical simulations in a massively parallel manner. The availability of MOOSE and the porous flow module under an open-source license promotes collaborative efforts in this research field.
COMPUTERS & GEOSCIENCES
(2021)
Article
Energy & Fuels
Heather A. Sheldon, Andy Wilkins, Christopher P. Green
Summary: Aquifer Thermal Energy Storage (ATES) systems utilize excess thermal energy to heat water stored underground, with recovery efficiency being a crucial factor in determining viability. This study explores the variation of recovery efficiency with different aquifer properties and operating conditions for high temperature (HT) ATES systems. The results suggest that HT-ATES systems may be feasible at injection temperatures as high as 300 degrees C, depending on aquifer characteristics and operational parameters. Additionally, daily cycles are shown to be more efficient across a range of conditions compared to annual cycles.
Article
Engineering, Geological
Manoj Khanal, Deepak Adhikary, Rao Balusu, Andy Wilkins, Bharath Belle
Summary: Most research on goaf-hole failures has been done using 2D numerical analyses, which may not provide a full picture of strata movement and stress change effect. This paper uses advanced 3D numerical modelling to understand the goaf-hole shear failure mechanism and investigate the impact of geo-mechanical properties and panel widths on shear development. The results highlight the importance of 3D modelling for capturing true three-dimensional strata deformation behavior.
GEOTECHNICAL AND GEOLOGICAL ENGINEERING
(2022)
Article
Energy & Fuels
Qingdong Qu, Jingyu Shi, Andy Wilkins
Summary: Coal seam permeability is crucial for coal seam gas extraction and gas outburst control. While Australian coal mines estimate permeability using packer tests or drill stem tests, Chinese coal mines estimate a parameter called gas conductivity coefficient by measuring natural gas flow rates. Numerical modeling and simulations show that the Chinese method can estimate permeability with a high level of accuracy.
Article
Biochemical Research Methods
Nicholas J. Beeton, Andrew Wilkins, Adrien Ickowicz, Keith R. Hayes, Geoffrey R. Hosack
Summary: This study describes a model for the spread of a gene drive system in the Anopheles gambiae subspecies in sub-Saharan Africa. The results suggest that under suitable conditions, gene drive can potentially spread from offshore islands to the African mainland, but resistance may develop over time. This model can help understand the mechanisms of mosquito gene drive and how it can be effectively and safely applied in the field.
PLOS COMPUTATIONAL BIOLOGY
(2022)
Article
Multidisciplinary Sciences
Andy Wilkins, Russell Crosbie, Tristan Louth-Robins, Phil Davies, Matthias Raiber, Warrick Dawes, Lei Gao
Summary: This study upscales chloride deposition-rate measurements at various points in Australia to the entire continent and estimates uncertainties. The resulting dataset can be used for estimating groundwater recharge, salt balance estimates, regional investigations of groundwater hydrochemistry, and corrosion prediction.
Article
Computer Science, Software Engineering
Alexander D. Lindsay, Derek R. Gaston, Cody J. Permann, Jason M. Miller, David Andrs, Andrew E. Slaughter, Fande Kong, Joshua Hansel, Robert W. Carlsen, Casey Icenhour, Logan Harbour, Guillaume L. Giudicelli, Roy H. Stogner, Peter German, Jacob Badger, Sudipta Biswas, Leora Chapuis, Christopher Green, Jason Hales, Tianchen Hu, Wen Jiang, Yeon Sang Jung, Christopher Matthews, Yinbin Miao, April Novak, John W. Peterson, Zachary M. Prince, Andrea Rovinelli, Sebastian Schunert, Daniel Schwen, Benjamin W. Spencer, Swetha Veeraraghavan, Antonio Recuero, Dewen Yushu, Yaqi Wang, Andy Wilkins, Christopher Wong
Summary: The last two years have witnessed unprecedented growth for the MOOSE community and its software. The website's monthly visitor count has increased from just over 3,000 to an average of 5,000. Furthermore, over 1,800 pull requests have been merged since the beginning of 2020, and the new discussions forum has attracted an average of 600 unique visitors per month. The previous publication has been cited over 200 times in the past two years. This paper provides an update on the key additions and changes to the code and ecosystem, as well as acknowledges the contributions from the community.
Article
Engineering, Chemical
Christopher Green, Samuel J. Jackson, James Gunning, Andy Wilkins, Jonathan Ennis-King
Summary: The FluidFlower International Benchmark Study offers a unique opportunity to assess the uncertainties brought by numerical modeling by comparing with high-quality experimental data. This paper presents a complete description of how CSIRO modeled the experiment, from the simplified model of tracer tests and subsequent inversion of permeability data using spatial tracer concentration, to the rapid development of an open-source finite volume simulator capability, and finally to the numerical predictions and reporting of key metrics.
TRANSPORT IN POROUS MEDIA
(2023)
Article
Geosciences, Multidisciplinary
Jose M. Bastias Espejo, Andy Wilkins, Gabriel C. Rau, Philipp Blum
Summary: The development of RHEA, an open-source application capable of including element-resolution hydro-geomechanical properties in coupled simulations, provides a valuable tool to assess challenging real-world hydro-geomechanical systems with different levels of complexity.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2021)
Article
Engineering, Geological
Manoj Khanal, Brett Poulsen, Deepak Adhikary, Rao Balusu, Andy Wilkins, Bharath Belle
Summary: This study investigates the failure mechanism of vertical goaf drainage holes in a operating Australian mine due to strata shear during longwall mining, using advanced 3D finite element modelling and 2D discrete element modelling simulation techniques. Finite element modelling is employed to locate high shear areas in the overburden strata at the vertical goaf gas drainage hole region, while discrete element modelling is used to analyze connectivity from the goaf region to the goaf-gas drainage system.
GEOTECHNICAL AND GEOLOGICAL ENGINEERING
(2021)
