Fig. 17
Cloud diagram of plastic zone in roadway under different mining-excavation positions. This picture shows the plastic zone of the roadway at various stages as shown in the cloud diagram; within the interval from 80m before the intersection to 20m after the intersection, the stability of the roadway perimeter rock is greatly reduced by the influence of the over-supporting pressure of the neighbouring working face, leading to serious deformation of the perimeter rock in this area.13313 The plastic zone of the right gang of the return roadway is extended, with a destructive depth of about 2m.
