Study on the Rheological Failure Mechanism of Weakly Cemented Soft Rock Roadway during the Mining of Close-Distance Coal Seams: A Case Study

Figure 17

Nephogram of stress perpendicular to the section auxiliary haulage roadway (perpendicular to the axis section of the roadway): (a) 2-2 upper coal seam excavation; (b) 20314 tailgate excavation; (c) 20314 panel excavation.

(a)

(b)

(c)