TV Borehole Inspection And Vacuum Testing Of Roof Strata

Herget, G.
Organization: International Conference on Ground Control in Mining
Pages: 5
Publication Date: Jan 1, 1982
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To improve quality control of roof conditions, a program was carried out at Elliot Lake uranium nines in Ontario, Canada to test a portable TV camera system. This camera has a 29 mm diameter probe and is capable of identifying crock locations, crack width and approximate dip direction. The extent of fractures to the roof was checked with the aid of a vacuum system by placing packers in various boreholes and checking for communication. The removal of some rock bolts indicated an increase in fracture extent.
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