Fig. 8

Schematic diagram of mining process of 1802 working face: (a) Excavate 600 m; (b) Excavate 1000 m; (c) Excavate 1400 m; (d) Excavate 1800 m; (e) Excavate 2200 m; (f) Excavate 2600 m; (g) Excavate 3000 m; (h) Excavate 3400 m.

Schematic diagram of mining process of 1802 working face: (a) Excavate 600 m; (b) Excavate 1000 m; (c) Excavate 1400 m; (d) Excavate 1800 m; (e) Excavate 2200 m; (f) Excavate 2600 m; (g) Excavate 3000 m; (h) Excavate 3400 m.