The Breaking Span of Thick and Hard Roof Based on the Thick Plate Theory and Strain Energy Distribution Characteristics of Coal Seam and Its Application

Figure 8

The simulation results.

(a) The face’s advancing distance is 30 m

(b) The face’s advancing distance is 60 m

(c) The face’s advancing distance is 90 m

(d) The face’s advancing distance is 120 m

(e) The face’s advancing distance is 150 m

(f) The face’s advancing distance is 180 m