Study on the Strata Movement Rule of the Ultrathick and Weak Cementation Overburden in Deep Mining by Similar Material Simulation: A Case Study in China

Figure 17

Subsidence of multiworking faces mining in different depth: (a) single mined working face; (b) two mined working faces; (c) three mined working faces; (d) four mined working faces.

(a)

(b)

(c)

(d)