A Discussion of Stability and Engineering Verification of Thin Immediate Roof under Uniform Load of the Rectangular Coal Roadway

Figure 12

Parameter analysis of maximum tensile stress of thin immediate roof under uniform load. (a) The coal cohesion. (b) The coal friction angle. (c) The coal cohesion of the contact surface. (d) The friction angle of the contact surface. (e) The thickness of the thin immediate roof. (f) The supporting strength. (g) The roadway height. (h) The roadway width.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)