Match!
Pathegama Gamage Ranjith
Monash University
414Publications
42H-index
6,231Citations
Publications 427
Newest
#1Yang Hao (CUMT: China University of Mining and Technology)H-Index: 2
#2Yu Wu (CUMT: China University of Mining and Technology)H-Index: 16
Last.Yi Teng (CUMT: China University of Mining and Technology)H-Index: 1
view all 6 authors...
Abstract With mining at deep levels worldwide, surrounding rocks of roadways are prone to suffer from high stress fields, large deformation, and burst-potential. Therefore, it is critical to develop high performance energy-absorbing rock bolts to carry high load, accommodate large rock deformation, and energy absorbing. In this paper, a novel energy-absorbing rock bolt with high constant working resistance and long elongation is theoretically and experimentally investigated. The new bolt is comp...
Source
#1M.H. Samarakoon (Monash University)
#2Pathegama Gamage Ranjith (Monash University)H-Index: 42
Last.V.R.S. De Silva (Monash University)H-Index: 5
view all 3 authors...
Abstract Alkali-activated binders (AABs) have the potential to consume various types of cementitious waste materials, including coal ashes, municipal solid waste incinerator ash, palm-oil fuel ash, steel slags, mine tailings, cement kiln dust, ceramic tile residue, rice husk ash, and waste glass. This paper presents a study of alkali-activated cement paste produced with the substitution of the cementitious waste material soda-lime glass, which makes up the major proportion of the general glass w...
Source
Abstract In-situ leaching (ISL) could be a viable alternative to conventional open cut mining, which is becoming increasingly uneconomic and energy intensive with increasing global mineral extraction and decreasing ore-grade. However, ISL is only applicable in permeable rock media. ISL has the potential to be adopted as an economic and energy efficient mining technology, provided that effective and safe artificial fracture stimulation can be performed in host rock to enhance permeability. In thi...
Source
#1Decheng Zhang (HEBUT: Hebei University of Technology)
#2Pathegama Gamage Ranjith (Monash University)H-Index: 42
Last.Cheng Zhang (Chongqing University)H-Index: 4
view all 4 authors...
Abstract Steady-state and unsteady-state (downstream pressure build-up) gas permeability tests were conducted on low permeability siltstone at a series of upstream pressures during the loading and unloading processes. The characteristics of downstream pressure build-up curves are analysed in detail, and the permeability is calculated based on the data in the stabilization stage. Analysing approaches with and without consideration of the sample pore volume are used to obtain the unsteady-state pe...
Source
#1Jian-Jian Zhao (CUMT: China University of Mining and Technology)H-Index: 1
#2Yong Zhang (CUMT: China University of Mining and Technology)H-Index: 1
Last.Pathegama Gamage Ranjith (Monash University)H-Index: 42
view all 3 authors...
Abstract Borehole blasting is a technique widely applied to form fracture networks in coal masses. There are many original cracks in coal masses, such as bedding planes and cleat planes. Coal masses are also subjected to high in-situ stress deep underground. However, the effects of pre-existing cracks and in-situ stress on blast-induced fractures are not well understood. In this paper, the isotropic and kinematic hardening plasticity model considering compression and tensile failure is introduce...
Source
#1K.H.S.M. Sampath (University of Melbourne)H-Index: 5
#2M.S.A. Perera (University of Melbourne)H-Index: 26
Last.Li Dong-yinH-Index: 1
view all 5 authors...
Abstract Multiple CO2 diffusion mechanisms coexist in the coal matrix in certain pore pressure ranges and the subsequent CO2 adsorption induced-matrix swelling alters the hydro-mechanical properties of the seam. We investigate the CO2 diffusion/adsorption-induced swelling behaviour of the coal matrix, through a fully-coupled gas flow – adsorption – coal deformation model. Besides the constant diffusion coefficient-based approach, the multiple diffusion mechanisms including slip flow and Knudsen ...
Source
#1D.W. Jayasekara (Monash University)
#2Pathegama Gamage Ranjith (Monash University)H-Index: 42
view all 5 authors...
Abstract This study aims at focusing on the geo-chemical reactions of caprock upon injection of supercritical CO2 (ScCO2) under deep saline aquifer's conditions. The caprock samples were obtained at a depth of 979 m in the DMP Harvey-2 well, which is recognized as mudstone in the Lesueur Formation of the South-west Hub geo-sequestration project located at south of Perth in Australia. Geo-chemical reactions were conducted in a reaction chamber to determine the chemical reactivity of brine-saturat...
Source
#1Decheng Zhang (HEBUT: Hebei University of Technology)
#2Pathegama Gamage Ranjith (Monash University)H-Index: 42
Last.Guowei Ma (HEBUT: Hebei University of Technology)
view all 4 authors...
Abstract Absolute and water saturation dependent gas flow under reservoir conditions is important for the exploration of deep energy resources. Steady-state and various unsteady-state argon permeability tests were conducted on dry Niutitang shale during the confinement loading and unloading cycles, then different gases were used for steady-state permeability tests at the final confinement of 20 MPa. Permeability decreased by 36% with the confinement increasing from 5 MPa to 60 MPa, and around 66...
Source
#1Tingting Wang (Monash University)
#2Tao Zhang (Northeast Petroleum University)
Last.Wanchun Zhao (Monash University)
view all 7 authors...
Abstract It is significant to accurately evaluate the brittleness of rock mass for the effective evaluation post-fracture of unconventional oil and gas reservoirs and stability of underground mining engineering. The failure of rock mass under compression is regarded as deformation and rupture of the double-body system. A new index for the brittleness evaluation of rock mass is proposed based on catastrophe theory. The new method can provide critical detail description to the variation of critica...
Source
#1C.P. Zhang (Monash University)H-Index: 4
#2P. Cheng (Chongqing University)
Last.Junping Zhou (Chongqing University)H-Index: 7
view all 5 authors...
Abstract Fracture surfaces were measured using a 3-D optical topography scanner, and the fracture surfaces caused by CO2 fracturing are much rougher than those caused by water fracturing due to the stronger penetrability of CO2 through tiny pores and channels. The fracture roughness of siltstone with intensive macro-pores is greater than that of shale, because fractures preferably propagate along the orientation of macro-pores. Fracture flow conductivity is greatly enhanced after small shear dis...
Source
12345678910