Mechanism and Integrated Control of “Rib Spalling: Roof Collapse—Support Instability” Hazard Chains in Steeply Dipping Soft Coal Seams

Figure 19

The support enhancement program for the coal wall and roof. (a) Double metal mesh on support. (b) Enlarged guard plate. (c) Support with guard plate, metal mesh, and universal beam. (d) Section of coalface.

(a)

(b)

(c)

(d)