The three stages of stress relaxation - Observations for the time-dependent behaviour of brittle rocks based on laboratory testing

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• 作者：Chrysothemis Paraskevopoulou^a ; ^{chrys.parask@gmail.com} ; ^{chrys.parask@queensu.ca} ; ^{cparaske@ethz.ch} ; Matthew Perras^b ; ^{matthew.perras@erdw.ethz.ch} ; Mark Diederichs^a ; ^{diederim@queensu.ca} ; Florian Amann^b ; ^{florian.amann@erdw.ethz.ch} ; Simon Lö ; w^b ; ^{simon.loew@erdw.eth.ch} ; Tom Lam^c ; ^tlam@nwmo.ca ; Mark Jensen^c ; ^{mjensen@nwmo.ca}
• 关键词：Time-dependent behaviour ; Time-dependency ; Stress relaxation testing ; Laboratory testing ; Stages of stress relaxation ; Brittle rocks
• 刊名：Engineering Geology
• 出版年：2017
• 出版时间：12 January 2017
• 年：2017
• 卷：216
• 期：Complete
• 页码：56-75
• 全文大小：4133 K
• 卷排序：216

文摘

We give insight into the time-dependent behaviour of rock materials and the importance of performing laboratory testing. The paper focuses on stress relaxation of brittle rocks, the time-dependent response under constant (controlled) strain. We show that three distinct stages during stress relaxation take place. A data set of stress relaxation test results is presented to estimate and predict the relaxation of different rock types.