A tensioned rod anchoring the roof of a working to the strata above.
〔矿〕（用来加固顶板岩层的）顶板锚杆
Example sentencesExamples
The protracted closure of the main pool for three months after the failure of a couple of roof bolts, and the lack of publicity for the training pool's availability, meant many customers simply ‘lost the habit’ of visiting their local pool.
She stated in her letter that the pool was closed for repair work for three months due to a couple of roof bolts.