A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Energy, mine stability and rockbursts
Abstract The discussion in preceding chapters was concerned with the design of single, or mechanically isolated, excavations in different types of rock media. In all cases, a design objective was to achieve a static stress distribution, or a set of static forces on joint-defined internal surfaces, which could be sustained by the constituent elements of the rock mass. This approach would be completely satisfactory if rockbursts and similar dynamic events did not need to be considered in underground excavation design, or if the stress concentrations which occur around openings were achieved in a pseudo-static way. Rockbursts are a pervasive problem in mines which operate at high extraction ratio, and involve release and transmission of seismic energy from the zone of influence of mining. Furthermore, in metalliferous mining, the development of mine excavations, for both access and ore production, frequently involves near-instantaneous generation of segments of the excavation surface. As observed in Chapter 1, the development of an underground opening is mechanically equivalent to application of a set of tractions over a surface representing the excavation boundary. Thus, typical excavation development practice is represented mechanically by the impulsive application of these surface forces in the rock medium.
Energy, mine stability and rockbursts
Abstract The discussion in preceding chapters was concerned with the design of single, or mechanically isolated, excavations in different types of rock media. In all cases, a design objective was to achieve a static stress distribution, or a set of static forces on joint-defined internal surfaces, which could be sustained by the constituent elements of the rock mass. This approach would be completely satisfactory if rockbursts and similar dynamic events did not need to be considered in underground excavation design, or if the stress concentrations which occur around openings were achieved in a pseudo-static way. Rockbursts are a pervasive problem in mines which operate at high extraction ratio, and involve release and transmission of seismic energy from the zone of influence of mining. Furthermore, in metalliferous mining, the development of mine excavations, for both access and ore production, frequently involves near-instantaneous generation of segments of the excavation surface. As observed in Chapter 1, the development of an underground opening is mechanically equivalent to application of a set of tractions over a surface representing the excavation boundary. Thus, typical excavation development practice is represented mechanically by the impulsive application of these surface forces in the rock medium.
Energy, mine stability and rockbursts
Brady, B. H. G. (author) / Brown, E. T. (author)
Rock Mechanics ; 251-287
Second edition
1999-01-01
37 pages
Article/Chapter (Book)
Electronic Resource
English
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