Institute of Rock and Soil Mechanics, Chinese Academy of Sciences (published by Elsevier) Posted on May 6, 2015 by SCG DR Copyright Holders: Institute of Rock and Soil Mechanics, Chinese Academy of Sciences (published by Elsevier) Self-archiving policy Conditions Accepted version: X Open Access Journal Published version: √ Open Access Journal Remarks: JRMGE confirmed that the published version but not the accepted version can be used in association with a full citation, copyright, a link and author’s affiliation. (verified by Bo Siang via email) Verification Date: 04.05.2015