Review Article
Large Section of Soft Rock Gob-Side Entry Retaining Surrounding Rock Control
Figure 4
Location of roof rock breakage: (a) breakage above the solid coal side, (b) breakage above the roof of the roadway, (c) breaking above the mining area, and (d) breaking above the mining area after precracking and blasting.
(a) |
(b) |
(c) |
(d) |