Not having a go just curious.
Neil, why are you insistent on these bolts being okay for this particular application. The mechanical type bolt is so dependant on the compressive strength of the rock. With, in my opinion, the shallow depth that these bolts are placed, these are not adequate for the application. Even with the utmost care in placement these bolts the margin of failure is just not high enough and the bolting not 'best practice'. :-) |