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Keywords: tangent angle
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Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-536
... displacements of rockmass are predicted. The formula of predicting unstable time with tangent angle is established. INTRODUCTION It is well known that there are many Grey systems in reality, which are complex systems formed by both known and unknown factors or indefinite factors. To define all of factors...

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