Investigations into the corrosive environments ...
2016-1-1 · Approximately 200 broken rock bolts have been collected from twelve Australian coal mines and received into UNSW laboratories for various analyses. All of the rock bolts were 21.7 mm core diameter, “X” grade steel which is typically >600 MPa yield and >840 MPa UTS. Three main failure modes are visually evident as shown in Fig. 1. Rebar SCC represented 63% of the broken bolts, …
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