Conference Proceedings
Symposium on Rock Bolting, February 1971
Conference Proceedings
Symposium on Rock Bolting, February 1971
Rotary Boring and Resin Bolting at Metropolitan Colliery
Metropolitan Colliery has some areas of roof where immedi- ate support is required in development. The disadvantages of percussive roof bolting at the face have led to recent produc- tion trials with rotary boring and rapid=setting resin anchored roof bolts developed at the Colliery. The three innovations involved are: (1) the wet drilling of small holes with an all- hydraulic, portable rotary boring machine; (2) the rapidity of loading a "point anchored" resin bolt; and (3) the consistently high anchorage strength available. All three innovations provide striking advantages over the previously available alternatives. The greatest disad- vantage - that of cost of resin - is not prohibitive, and there is promise of improvement in the future. There are possibilities of variations of the techniques for special support problems in particularly difficult roofs.
Contributor(s):
A E R McCoy, L Vnenk, A J Hargraves
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- Published: 1970
- PDF Size: 1.033 Mb.
- Unique ID: P197101012