Research and Application of Open-Off Cut Roof Cutting Pressure Releasing Technology

Figure 9

Numerical simulation results: (a) mining to footage 0 (m) ① open-off cut roof cutting condition; ② open-off cut roof uncut condition; (b) mining to footage 10 (m) ① open-off cut roof cutting condition; ② open-off cut roof uncut condition; (c) mining to footage 20 (m) ① open-off cut roof cutting condition; ② open-off cut roof uncut condition; (d) mining to footage 40 (m) ① open-off cut roof cutting condition; ② open-off cut roof uncut condition.

(a)

(b)

(c)

(d)