supported by the National Natural Science Foundation of China(Grants No.41772329,41572283 and 41230635);the funding of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection(Nos.SKLGP2017Z001 and SKLGP2013Z004);supported by the Funding of Science and Technology Office of Sichuan Province(Grants No.2015JQ0020 and 2017TD0018)
As an estimate for the in-situ spalling strength around massive underground excavations to moderately jointed brittle rocks, crack initiation stress marks the initiation of rock micro fracturing. It is crucial to accu...
supported by National Natural Science Foundation of China(Grant No.41230635);Projects of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection(Grant No.SKLGP2013Z004);The Cultivating programme of middle-aged backbone teachers of Chengdu University of Technology(Grant No.JXGG201703);Key Projects of Education Department of Sichuan Province(Grant No.16ZA0095)
High geothermal temperatures appear to be unfavorable for the construction of tunnels in slate rocks with high overburden. To investigate the mechanical characteristics of slates at various levels of geothermal temper...