By B. H. G. Brady
This re-creation has been thoroughly revised to mirror the awesome recommendations in mining engineering and the outstanding advancements within the technology of rock mechanics and the perform of rock angineering taht have taken position over the past twenty years. even if "Rock Mechanics for Underground Mining" addresses some of the rock mechanics matters that come up in underground mining engineering, it's not a textual content solely for mining functions. according to wide expert learn and educating event, this ebook will supply an authoratative and finished textual content for ultimate yr undergraduates and beginning postgraduate stydents. For profesional practitioners, not just will it's of pursuits to mining and geological engineers, but in addition to civil engineers, structural mining geologists and geophysicists as a customary paintings for pro reference reasons.
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7 Components and logic of a rock mechanics programme. multi-pass loop. There are two main reasons for this. First, the site characterisation phase never generates a sufficiently comprehensive data base from which to develop a unique plan for the complete life of the mine. Second, mine design is itself an evolutionary process in which engineering responses are formulated to reflect the observed performance of the mine structure under actual operating conditions. 7. At times, some of the activities, or parts of those activities, may proceed in parallel.
The change in loading conditions from the initial state to the final state causes a displacement of each point relative to all other points. If the applied loads constitute a self-equilibrating set, the problem is to determine the equilibrium displacement field induced in the body by the loading. A particular difficulty is presented in the analysis of displacements for a loaded body where boundary conditions are specified completely in terms of surface tractions. In this case, unique determination of the absolute displacement field is impossible, since any set of rigid-body displacements can be superimposed on a particular solution, and still satisfy the equilibrium condition.
This procedure represents no more than a logical formalisation of the observational principle long used in soil mechanics practice (Peck, 1969). It is a natural engineering response to the problems posed by basic limitations in site characterisation and conceptualisation associated with excavation design in geologic media. 1 Problem definition The engineering mechanics problem posed by underground mining is the prediction of the displacement field generated in the orebody and surrounding rock by any excavation and ore extraction processes.