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Keywords: drainage tunnel
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Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-052
... heights are 500m to 850m; but some of these will approach 1000m in the future. Surface water in the current pit is discharged through vertical shafts into a 3km long drainage tunnel beneath the base of the pit, which then discharges into a creek lower in the mountains. In order to achieve stable and...
Proceedings Papers

Paper presented at the ISRM International Symposium - 2nd Asian Rock Mechanics Symposium, September 11–14, 2001
Paper Number: ISRM-ARMS2-2001-007
... branches were of open excavation corresponding to the chamber of the ~ame segment. The rock body for the lead should be retained at east 30m above the chamber floor, Open excavation vs. drainage tunnel excavation: The drainage tunnels were excavated prior to the chamber open excavation. Open excavation vs...

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