Fig. 7
Schematic diagram of “square” excavation of 1802 working face: (a) Excavate 100 m; (b) Excavate 150 m; (c) Excavate 200 m; (d) Excavate 250 m; (e) Excavate 300 m.
Fig. 7 | Scientific Reports
Schematic diagram of “square” excavation of 1802 working face: (a) Excavate 100 m; (b) Excavate 150 m; (c) Excavate 200 m; (d) Excavate 250 m; (e) Excavate 300 m.
