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Keywords: extensometer rod
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Proceedings Papers

Paper presented at the ISRM International Symposium on Rock Mechanics - SINOROCK 2009, May 19–22, 2009
Paper Number: ISRM-SINOROCK-2009-163
.... The displacements of extensometer rods of 3 and 4m depth (Figure 8) at the Left side tunnel wall were proportional to the Vmax for few near-field blast rounds of main tunnel blasts. There was no considerable change in the extensometer readings of these rods for some of the Vmax levels below Vcr (370 mm/s). After 40...

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