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Contemporary rock mechanics practice for underground mining and ground control
386A 906512 Recent developments in the application of the influence function method for ground movement predictions in the U.S. Karmis, M; Agioutantis, Z; Jarosz, A
Min Sci Technol VIO, N3, May 1990, P233-245 A bell-shaped Gaussian influence function was developed to predict ground movement associated with underground mining. Two formulations, one for rectangular panels, the other for irregular panels, were used to predict subsidence, horizontal displacement and strain, slope, and curvature. Empirical subsidence parameters were developed to assist application of the method, although site specific parameters may be used. Comparison of predictions with site measurements demonstrates the suitability of this technique for the East Appalachian coalfields. 906513 Finite element analysis for the establishment of stress development in a coal mine caved waste Trueman, R
Min Sci Teclmoi VIO, N3, May 1990, P247-2S2 Stress strain behaviour of longwall coal mining goaf was studied and data used in a finite element analysis to investigate vertical stress buildup in the goaf. The distance at which cover load is reached is seen to be a function of seam thickness and bulking factor of immediate roof, rather than the widely accepted depth below surface. Observations fit well in the majority of cases. Caved waste can carry vertical stress in excess of cover load, although the extremely wide panels where this could occur are not in current use. 906514 Contemporary rock mechanics practice for underground mining and ground control Brady, B H
Proc 7th Annual Workshop Generic Mineral Technology Center Mine Systems Design and Ground Control, Blacksburg, 22-24 October 1989 P3-14. Publ Blacksburg: Virginia Polytechnic Institute and State University, 1989 Recent developments in rock mechanics practice for ground control in underground mining are described. Practical methods of large-scale reinforcement of mine excavations are considered and a technique for reinforcement design is illustrated.
Promising methods for analysis and mitigation of rockbursts and the analysis of mining-induced surface subsidence are discussed. While the review is by no means comprehensive, it identifies those topics which need further attention to improve the reliability of particular aspects of mine excavation design.
Subjects Peripheral to Geomechanics Snow and ice mechanics 906515 Creep of ice measured with the presuremeter (In French) Kjartanson, B H; Shields, D H; Domaschuk, L; Man, C S
Rev Fr Geotech NSO, 1990, P23-38 Pressuremeter testing offers the possibility of testing ice in the undisturbed state at real field conditions. Laboratory proving tests on polycrystaUine ice at -2 deg C are described. The instrument used provided accurate measurements over a 7 week period. Results are in general agreement with those of uniaxiai compression tests, but the power law dependence of primary creep was not confirmed by prcssuremeter tests.
Fracture mechanics 906516 Rock fracture mechanics - past, present, future (In German) Rossmanith, H P
Felsbau V8, N2, May 1990, P68-73 Fracture mechanics concepts and their application to rocks and rock like materials are outlined. Presently accepted theories on rock fracture formation are described and fracture testing of rock is reviewed. Some applications, such as optimisation of blasting and fragmentation in layered and monolithic rocks, are discussed.
© 1990 Pergamon Press plc. Reproduction not permitted
Min Sci Technol VIO, N3, May 1990, P233-245 A bell-shaped Gaussian influence function was developed to predict ground movement associated with underground mining. Two formulations, one for rectangular panels, the other for irregular panels, were used to predict subsidence, horizontal displacement and strain, slope, and curvature. Empirical subsidence parameters were developed to assist application of the method, although site specific parameters may be used. Comparison of predictions with site measurements demonstrates the suitability of this technique for the East Appalachian coalfields. 906513 Finite element analysis for the establishment of stress development in a coal mine caved waste Trueman, R
Min Sci Teclmoi VIO, N3, May 1990, P247-2S2 Stress strain behaviour of longwall coal mining goaf was studied and data used in a finite element analysis to investigate vertical stress buildup in the goaf. The distance at which cover load is reached is seen to be a function of seam thickness and bulking factor of immediate roof, rather than the widely accepted depth below surface. Observations fit well in the majority of cases. Caved waste can carry vertical stress in excess of cover load, although the extremely wide panels where this could occur are not in current use. 906514 Contemporary rock mechanics practice for underground mining and ground control Brady, B H
Proc 7th Annual Workshop Generic Mineral Technology Center Mine Systems Design and Ground Control, Blacksburg, 22-24 October 1989 P3-14. Publ Blacksburg: Virginia Polytechnic Institute and State University, 1989 Recent developments in rock mechanics practice for ground control in underground mining are described. Practical methods of large-scale reinforcement of mine excavations are considered and a technique for reinforcement design is illustrated.
Promising methods for analysis and mitigation of rockbursts and the analysis of mining-induced surface subsidence are discussed. While the review is by no means comprehensive, it identifies those topics which need further attention to improve the reliability of particular aspects of mine excavation design.
Subjects Peripheral to Geomechanics Snow and ice mechanics 906515 Creep of ice measured with the presuremeter (In French) Kjartanson, B H; Shields, D H; Domaschuk, L; Man, C S
Rev Fr Geotech NSO, 1990, P23-38 Pressuremeter testing offers the possibility of testing ice in the undisturbed state at real field conditions. Laboratory proving tests on polycrystaUine ice at -2 deg C are described. The instrument used provided accurate measurements over a 7 week period. Results are in general agreement with those of uniaxiai compression tests, but the power law dependence of primary creep was not confirmed by prcssuremeter tests.
Fracture mechanics 906516 Rock fracture mechanics - past, present, future (In German) Rossmanith, H P
Felsbau V8, N2, May 1990, P68-73 Fracture mechanics concepts and their application to rocks and rock like materials are outlined. Presently accepted theories on rock fracture formation are described and fracture testing of rock is reviewed. Some applications, such as optimisation of blasting and fragmentation in layered and monolithic rocks, are discussed.
© 1990 Pergamon Press plc. Reproduction not permitted