Short Cantilever Rock Beam Structure and Mechanism of Gob-Side Entry Retaining Roof in Reuse Period

Figure 2

Structure form of short cantilever-articulated rock beam. (a) Roof structure in the stage of gob-side entry retaining, (b) roof structure in the early stage of reuse of gob-side entry retaining, and (c) the roof structure in the late stage of reuse of gob-side entry retaining.

(a)

(b)

(c)