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Keywords: different tunnel
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Proceedings Papers

Paper presented at the ISRM SINOROCK 2013, June 18–20, 2013
Paper Number: ISRM-SINOROCK-2013-106
... the collapse develops to a certain degree, the middle rock pillar collapse, cracks appear and enlarge above the two tunnels, and finally the surrounding rock under the cracks drops and so a combinated collapse arch formed. Secondly, the failure mode of small spacing tunnel is different under different tunnel...

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