Determination of the long-term strength of rocks by short-term tests
Abstract
With the development of theoretical and experimental studies, the general picture of manifestations of rock pressure, the mechanism of deformation and destruction of rocks in time and space, becomes increasingly clear. It is established that one of the main acting factors is not short-term, as previously thought, but long-term strength. The issues of stability, reliability of support of cleaning and preparatory workings and many others cannot be satisfactorily solved without taking this factor into account. Specificity of solving these issues (short life of many mine workings, changes in mining and geological conditions, etc.) makes it necessary to obtain the characteristics of long-term strength in the shortest possible time. The existing method of determining these characteristics with the help of special equipment during testing under constant load requires a long time (from several months to several years) and does not satisfy the necessary conditions ...
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References
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