Research Article
Research on the Influence of Slurry Filling on the Stability of Floor Coal Pillars during Mining above the Room-and-Pillar Goaf: A Case Study
Figure 13
D1 borehole layout diagram and borehole TV observation equipment.
(a) Layout plane of the D1 borehole |
(b) Layout profile of the D1 borehole |
(c) Drilling TV equipment box |
(d) Television borehole camera and cables |