Bed Separation Characteristics of an LTCC Panel and Subsidence Controlling Grouting: Case Study of Longquan Coal Mine, China

Figure 7

Evolution of bed separation in the overburden of the 4203 LTCC panel. The longwall face advancing (a) 70 m, (b) 120 m, (c) 150 m, (d) 190 m, (e) 210 m, (f) 255 m, (g) 295 m, and (h) 335 m.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)