Hamid Roshan
University of New South Wales
Pore water pressurePorous mediumGeologyWettingOil shaleComposite materialPermeability (earth sciences)Geotechnical engineeringMaterials scienceMineralogyHydraulic fracturingHydrologyEnvironmental scienceFracture (geology)MultiphysicsCoalMechanicsContact anglePorosityPetroleum engineeringStress (mechanics)Fluid dynamicsShear (geology)
103Publications
24H-index
1,250Citations
Publications 108
Newest
#1Sobhan Hatami (Monash University)H-Index: 1
#2Tom Hughes (Monash University)H-Index: 1
Last. Stuart D.C. Walsh (Monash University)H-Index: 24
view all 5 authors...
Abstract null null Silica sol gels have the potential to act as sealing agents to reduce leakage risks associated with long-term CO null null null null null null 2 null null null null null storage. This study considers the effects of brines of varying chemical composition on the formation of sol gels, their viscosity, and their long term stability. The gelation times of sol–gel solutions were measured for different concentrations of SiO2, Na null null null null null null + null null null null , ...
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#1Muhammad Asad Pirzada (UNSW: University of New South Wales)H-Index: 4
#2M. Bahaaddini (SBUK: Shahid Bahonar University of Kerman)H-Index: 10
Last. Hamid Roshan (UNSW: University of New South Wales)H-Index: 24
view all 4 authors...
Abstract null null The role of surface geometry and its evolution during shearing process on the hydromechanical behaviour of rock discontinuities has long remained an open question for geologist. During the shearing process, only a fraction of discontinuity is in contact and the actual stresses on these contacts are considerably greater than nominal stresses. However, measuring the contact area during shearing process has been a significant experimental challenge due to difficulties in detectio...
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Abstract null null Permeability is arguably the most important parameter in gas pre-drainage and production practices in coal mining and coal seam gas industries. In fractured coal seams, permeability can significantly vary both laterally and vertically. Knowing the vertical variation of permeability in relatively thick coal seams is important in optimizing inseam pre-drainage design in underground coal mining and improving reservoir management and completion design efficiency in the coal seam g...
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#1Cut Aja Fauziah (Colorado School of Mines)H-Index: 5
#2Ahmed Al-Yaseri (Colorado School of Mines)H-Index: 21
Last. Ahmed Barifcani (Colorado School of Mines)H-Index: 37
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#1H. Salemi (Curtin University)H-Index: 2
#2Alexy Yurikov (Curtin University)
Last. Mohammad Sarmadivaleh (Curtin University)H-Index: 33
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Linear poroelastic effective stress law is often used to relate in situ total stresses to pore fluid pressure in underground formations. The indirect estimations of effective stress coefficient (Biot coefficient) based on porosity relationships are often not accurate, and therefore the Biot coefficient measurements on retrieved samples using hydro-mechanical laboratory testing is considered. In this study, we propose a new indirect technique to infer the Biot coefficient from micro X-ray compute...
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#1Klaus Regenauer-Lieb (UNSW: University of New South Wales)H-Index: 39
#2Manman Hu (HKU: University of Hong Kong)H-Index: 5
Last. Hamid Roshan (UNSW: University of New South Wales)H-Index: 24
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Abstract. Theoretical approaches to earthquake instabilities propose shear-dominated source mechanisms. Here we take a fresh look at the role of possible volumetric instabilities preceding a shear instability. We investigate the phenomena that may prepare earthquake instabilities using the coupling of thermo-hydro-mechano-chemical reaction–diffusion equations in a THMC diffusion matrix. We show that the off-diagonal cross-diffusivities can give rise to a new class of waves known as cross-diffusi...
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#2Hamid Roshan (UNSW: University of New South Wales)H-Index: 24
#4Hossein Masoumi (Monash University)H-Index: 12
#1K.E. Elphick (QUT: Queensland University of Technology)
#2Adelina Lv (UNSW: University of New South Wales)H-Index: 4
Last. Christoph Schrank (QUT: Queensland University of Technology)H-Index: 14
view all 6 authors...
Abstract We examine whether bedding thickness or constitutive properties correlate with the spacing of equally spaced shear-enhanced compaction bands and compactional shear bands in Miocene sandstones of the Whakataki Formation, North Island, New Zealand. Quantitative spacing analysis reveals a positive correlation between bedding thickness and the spacing of strata-bound deformation bands, as is commonly observed for veins, joints, and normal faults. The observed spacing to thickness ratio (STR...
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#1Mehdi Serati (UQ: University of Queensland)H-Index: 6
#2M. Bahaaddini (SBUK: Shahid Bahonar University of Kerman)H-Index: 10
Last. Nicholas Bryant (UQ: University of Queensland)
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This work aims to identify fracture pattern and crack growth mode in brittle rocks and solids under induced tensile stresses, and further investigates how the estimation of material tensile strength is influenced by the fracture mode in the Brazilian test. Using ultra-high-speed photography technique and optical methods at 100 kHz and above, the fracture propagation modes of 450 samples of several materials (including various rock types, ceramic, brittle polymers, concrete, asphalt, and construc...
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#1Adelina Lv (UNSW: University of New South Wales)H-Index: 4
#2Mohammad Ali Aghighi (UNSW: University of New South Wales)H-Index: 9
Last. Hamid Roshan (UNSW: University of New South Wales)H-Index: 24
view all 4 authors...
The effective stress coefficient (ESC) is a key parameter in the linear poroelastic effective stress formulation. In fluid-bearing porous media, the effective stress is the difference between total stress and a fraction of the pore fluid pressure controlled by the ESC. The ESC is either measured in the laboratory or estimated by empirical models using field data. Among different techniques, sonic velocity measurements are widely used to estimate the ESC. The structure of coal, however, has some ...
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