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Borehole inspection survey

The borehole inspection survey was conducted for capturing the damaged roek strata due to repeated blasting at Crown of tuimel. The images of borehole sections which contain the interface of intact and disturbed rock mass are shown in Figure 19. The maximum damage depth measured by the borehole camera survey with joint angle parallel to the tunnel profile was 3.21 m, but... [Pg.151]

Figure 12. Images ofpre-blast and post-blast inspection surveys of rock mass with acute joint orientations captured by borehole camera... Figure 12. Images ofpre-blast and post-blast inspection surveys of rock mass with acute joint orientations captured by borehole camera...
Video surveying Cameras are lowered down the well, which allows for a visual inspection of the well. In particular, the integrity of the borehole, casing, concrete and tubing can be checked. The fractures in the receptor zone into which the concentrate is injected can also assessed... [Pg.45]

See other pages where Borehole inspection survey is mentioned: [Pg.148]    [Pg.148]    [Pg.135]    [Pg.141]    [Pg.146]    [Pg.147]    [Pg.287]    [Pg.144]   
See also in sourсe #XX -- [ Pg.148 , Pg.151 ]



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