THE TIME-DEPENDENT REDUCTION OF SLIDING COHESION DUE TO ROCK BRIDGES ALONG DISCONTINUITIES: A FRACTURE MECHANICS APPROACH
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dc.contributor.author | Kemeny J. | |
dc.date.accessioned | 2022-02-10T07:21:54Z | |
dc.date.available | 2022-02-10T07:21:54Z | |
dc.date.issued | 2003 | |
dc.identifier | https://elibrary.ru/item.asp?id=1383133 | |
dc.identifier.citation | Rock Mechanics and Rock Engineering, 2003, 36, 1, 27-38 | |
dc.identifier.issn | 0723-2632 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/35176 | |
dc.description.abstract | In this paper, a fracture mechanics model is developed to illustrate the importance of time-dependence for brittle fractured rock. In particular a model is developed for the time-dependent degradation of rock joint cohesion. Degradation of joint cohesion is modeled as the time-dependent breaking of intact patches or rock bridges along the joint surface. A fracture mechanics model is developed utilizing subcritical crack growth, which results in a closed-form solution for joint cohesion as a function of time. As an example, a rock block containing rock bridges subjected to plane sliding is analyzed. The cohesion is found to continually decrease, at first slowly and then more rapidly. At a particular value of time the cohesion reduces to value that results in slope instability. A second example is given where variations in some of the material parameters are assumed. A probabilistic slope analysis is conducted, and the probability of failure as a function of time is predicted. The probability of failure is found to increase with time, from an initial value of 5% to a value at 100 years of over 40%. These examples show the importance of being able to predict the time-dependent behavior of a rock mass containing discontinuities, even for relatively short-term rock structures. | |
dc.subject | ROCK FRACTURE MECHANICS | |
dc.subject | TIME DEPENDENT | |
dc.subject | SUBCRITICAL CRACK GROWTH | |
dc.subject | SLOPE STABILITY | |
dc.subject | ROCK JOINT | |
dc.subject | ROCK FRACTURE | |
dc.subject | JOINT COHESION | |
dc.subject | JOINT FRICTION ANGLE | |
dc.subject | ROCK BRIDGE | |
dc.title | THE TIME-DEPENDENT REDUCTION OF SLIDING COHESION DUE TO ROCK BRIDGES ALONG DISCONTINUITIES: A FRACTURE MECHANICS APPROACH | |
dc.type | Статья |
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