Determination of Cyclic Filling Length in Gob-Side Entry Retained with Roadside Filling and Its Application

Figure 7

Immediate roof horizontal stress distribution cloud map of the retained roadway with different lengths of the lagging unsupported roof (unit: Pa). (a) Length of the lagging unsupported roof is 2.0 m. (b) Length of the lagging unsupported roof is 2.5 m. (c) Length of the lagging unsupported roof is 3.0 m. (d) Length of the lagging unsupported roof is 3.5 m. (e) Length of the lagging unsupported roof is 4.0 m. (f) Length of the lagging unsupported roof is 4.5 m. (g) Length of the lagging unsupported roof is 5.0 m.

(a)

(b)

(c)

(d)

(e)

(f)

(g)