Dear my colleagues,
I am working on tunnel supporting based rock classification. But I could not find any references to describe about determining length of rockbolts.
Thanks and forwards
Dear Zaryab,
This book can help you.
Z. T. Bieniawski ,“Engineering Rock Mass Classifications”, page: 75
The length L of rockbolts can be estimated from the excavation width B and the Excavation Support Ratio ESR.
https://www.rocscience.com/documents/hoek/corner/04_Rock_mass_classification.pdf
http://dtic.mil/dtic/tr/fulltext/u2/a219783.pdf
https://tu-freiberg.de/fakult3/gt/feme/e-book/10_Rock_Mass_Classification_Systems.pdf
https://nrmt.files.wordpress.com/2011/02/rock-mass-classification.pdf
http://home.agh.edu.pl/~cala/hoek/Chapter3.pdf
http://e-collection.library.ethz.ch/eserv/eth:23677/eth-23677-02.pdf
http://www.ncku.edu.tw/source/home/Chao-Shi-Chen/02.pdf
Dear Zaryab,
This book can help you.
Z. T. Bieniawski ,“Engineering Rock Mass Classifications”, page: 75
The length L of rockbolts can be estimated from the excavation width B and the Excavation Support Ratio ESR.
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