New Method to Design Coal Pillar for Lateral Roof Roadway Based on Mining-Induced Stress: A Case Study

Figure 2

Deformation of roof roadway with panel 31010 retreat: (a) Feb 12, 2012; (b) Mar 10, 2012; (c) Apr 06, 2012; (d) Apr 30, 2012; (e) Jun 09, 2012; (f) Jul 07, 2012.

(a)

(b)

(c)

(d)

(e)

(f)