Research Article
Theoretical Analysis of Damaged Width & Instability Mechanism of Rib Pillar in Open-Pit Highwall Mining
Figure 2
Borehole camera exploration in the rib pillar. (a) Monitoring design. (b) Test equipment YTJ20-BCED. (c) Photographs obtained from borehole at different depths.
(a) |
(b) |
(c) |