Bolt Report

Through the looking glass 14

# Dave Cardosa, Scott Harris, Greg Brooks / 1988

Before

Original Report

Reported By: Heath dieckert
Reported on: 10 Nov 2014
Issue: Placement
Bolt Number: 4
Severity:   5  
Description: Rock has cracked under bolt exposing shaft of bolt.

Developer/Admin Updates

Installed Date: 2014-12-02
Reviewed Name: [email protected]
Reviewed Date: 2014-12-02
Sug. Next Review: 2015-01-02
Suggested Action: Monitor

Admin Notes

I just fixed Through The Looking Glass. The bolt broke when trying to remove so I had to unfortunately drill a new hole. I would have attempted coring but didn't know for sure if the core bit I had would work correctly since it was developed for a 3/8 bolt. I also didn't trust the hole as it was total shit. I honestly can't believe a mechanical bolt was in this rock. I'm thankful no one got hurt. Please help me keep an eye on this bolt because the rock really isn't that good. My assumption about why the bolt broke is that it had been torquing on that lower spot where the hole started breaking out so the bolt was probably already stressed on the top. I think it is a pretty educated guess because it wasn't super hard to break and my attempts to loosen in normal ways was useless. Normally when this has happened to me in the past the cone starts slipping. Also, the sleeve broke at the same spot leaving me to believe there has been a lot of pressure on that spot. There is a new glue in and the hole has been patched.