Yanlin Zhao

Nov 20, 2024 | mdpi.com | Yuan Chen |Yanlin Zhao |Wei Wu |Qingqing Lin

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Dec 19, 2023 | mdpi.com | Yingjie Zhang |Yingjié Zhang |Yanlin Zhao |Qiang Liu |Hang Lin

All articles published by MDPI are made immediately available worldwide under an open access license. No specialpermission is required to reuse all or part of the article published by MDPI, including figures and tables. Forarticles published under an open access Creative Common CC BY license, any part of the article may be reused withoutpermission provided that the original article is clearly cited. For more information, please refer tohttps://www.mdpi.com/openaccess.

Jun 29, 2023 | frontiersin.org | Yong Wang |Yanlin Zhao |Danqing Song

1 IntroductionRock mass basic quality (BQ) and Protodyakonov coefficient (f) are the rock classification methods in China and Russia respectively. Due to the different methods of rock classification, serious communication problems arose during the tunnel project, which was designed according to Russian norms and built according to Chinese standards.