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