Roof-Breaking Characteristics and Ground Pressure Behavior in Deep Jurassic Coal Seams: A Thick-Plate Model and Field Measurements

Figure 11

Variation curves of working resistance in some hydraulic supports upon first weighting: (a) #8 hydraulic support, (b) #46 hydraulic support, (c) #92 hydraulic support, (d) #120 hydraulic support and (e) #174 hydraulic support.

(a)

(b)

(c)

(d)

(e)