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Keywords: chalk marlClose
Paper presented at the 5th Symposium of the Macedonian Association for Geotechnics, June 23–25, 2022
Paper Number: ISRM-MAG-2022-03
... (thirteen) clay-filled bedding-plane faults crossing the cavern axis. The other was the Channel Tunnel(s) between England and France driven by TBM in chalk marl with UCS of 4 to 7MPa. This rock was strong enough to be significantly jointed and cause serious over-break due to low Jr and high Jn especially...
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