Rudrajit Mitra
University of the Witwatersrand
Coal miningGeologyEngineeringShear rateMining engineeringSubsidenceGeotechnical engineeringClosure (topology)Materials scienceJoint (geology)RoofNumerical modelingGas managementRisk managementDirect shear testRock mass classificationCoalSlip (materials science)MechanicsStructural engineeringPetroleum engineeringShear (geology)
66Publications
12H-index
538Citations
Publications 67
Newest
#1M. E. Matlou (University of the Witwatersrand)
#2Rudrajit Mitra (University of the Witwatersrand)H-Index: 12
#1M. E. Matlou (University of the Witwatersrand)
#2Rudrajit Mitra (University of the Witwatersrand)H-Index: 12
#1Martin S. Brook (University of Auckland)H-Index: 4
#2Bruce Hebblewhite (UNSW: University of New South Wales)H-Index: 20
Last. Rudrajit Mitra (University of the Witwatersrand)H-Index: 12
view all 3 authors...
Abstract The rock mass rating (RMR) has been used across the geotechnical industry for half a century. In contrast, the coal mine roof rating (CMRR) was specifically introduced to underground coal mines two decades ago to link geological characterization with geotechnical risk mitigation. The premise of CMRR is that strength properties of mine roof rock are influenced by defects typical of coal measures stratigraphy. The CMRR has been used in longwall pillar design, roof support methods, and eva...
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#1Katarina DavidH-Index: 3
#2Wendy TimmsH-Index: 16
Last. Rudrajit MitraH-Index: 12
view all 3 authors...
Source
#1Yingchun Li (UNSW: University of New South Wales)H-Index: 13
#2Joung Oh (UNSW: University of New South Wales)H-Index: 16
Last. Bruce Hebblewhite (UNSW: University of New South Wales)H-Index: 20
view all 5 authors...
AbstractThis paper presents the results of numerical studies that illustrate the performance of a new joint constitutive model developed for the stability analysis of large-scale jointed rock masses. The joint model features the reduction of stiffness and strength due to joint initial opening and scale effect, which has been demonstrated by performing a series of direct shear tests. The study thus focuses on the model’s applicability to field-scale rock joints. The movement of a real rock slope ...
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#1Tien Dung Le (Hanoi University of Mining and Geology)H-Index: 4
#2Chengguo Zhang (UNSW: University of New South Wales)H-Index: 13
Last. Bruce Hebblewhite (UNSW: University of New South Wales)H-Index: 20
view all 5 authors...
Abstract This paper presents a new criterion for assessing top coal cavability in Longwall Top Coal Caving mining technology. Top coal Cavability Index (TCI) criterion was developed through a parametric study, statistical analysis and validation against field monitoring data. A discontinuum modelling technique with plastic rock material was used to quantify the impact of parameters on top coal cavability in a more realistic manner. The study demonstrated that an increase in the value of paramete...
Source
#1Chengguo Zhang (UNSW: University of New South Wales)H-Index: 13
#2Rudrajit Mitra (UNSW: University of New South Wales)H-Index: 12
Last. Bruce Hebblewhite (UNSW: University of New South Wales)H-Index: 20
view all 5 authors...
This paper presents a detailed study of the mechanisms contributing to fracture development around river valleys associated with mining operations. Due to the geology and geomorphology of the Southern Coalfield of New South Wales, Australia, non-conventional subsidence effects usually occur. The influences associated with valley closure and upsidence are principally tensile and shear fracturing/cracking of the river and underlying strata, which act as underground flow paths for surface water. Th...
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#1B. Genc (University of the Witwatersrand)H-Index: 13
#2Rudrajit Mitra (University of the Witwatersrand)H-Index: 12
Source
#2C. Musingwini (University of the Witwatersrand)H-Index: 10
The School of Mining Engineering (Wits Mining) at the University of the Witwatersrand (Wits) has a long history of Mining Engineering education, being the oldest and largest on the African continent. In 2016, the School celebrated 120 years in existence and according to the recent QS University Rankings, it is recognized as one of the world’s top mining engineering schools, hosting an expansive program. It also has one of the highest growth rates of any of the engineering schools or departments,...
Source
#1Tien Dung Le (UNSW: University of New South Wales)H-Index: 4
#2Rudrajit Mitra (University of the Witwatersrand)H-Index: 12
Last. Chengguo Zhang (UNSW: University of New South Wales)H-Index: 13
view all 5 authors...
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