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Author:
Sam Paterson
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2006-05-16 |
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We have a problem where our contractor wants to blast then support with rock bolts and then blast deeper again in an open cut type excavation.
Can anyone help with a rationale for determining the likely effect of the blasting on stability and how we account for that in design.
At present I can only find references for; Seismic type loads - which isn't really applicable due to frequency differences, And references for PPVs vs blast damage to structures.
I have found a reasonable reference from HK GEO report 12 but it doesn't truley consider the presence of support and is I beleive over-conservative.
Any response would be most welcome - especially something with a quick empirical fix :-)
Regards
Sam
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Subject:
Accounting for blasting in a rockbolted wall 