Investigation of the Optimal Layout of the Roadway in Closely Spaced Ultra-Thick Coal Seams Mining with Remaining Coal Pillars

Figure 11

Overlying rock movement caused by recovery at the 30503 working face and its influence on new roadway 2 (after new roadway 1 has been filled). (a) H = −2 m. (b) H = 0 m. (c) H = 2 m. (d) H = 4 m. (e) H = 6 m.

(a)

(b)

(c)

(d)

(e)