majid_sabet wrote:
From 1 to 10,(1 been the weakest ); which type of rocks are the worse for any type of bolting.
1-
2- Sandstone and Breccias
3- other Sandstone and some other Breccia
4- Sandstone in Australia
5- Basalt
6-
7- Crumbly Granite
8- Solid Granite
9-
10- Quartz Monzonite
(This post was edited by billcoe_ on May 26, 2009, 8:24 PM)
