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

Figure 12

Variation curves of working resistance of some hydraulic supports upon periodic weighting: (a) #4 hydraulic support, (b) #15 hydraulic support, (c) #30 hydraulic support, (d) #46 hydraulic support, (e) #60 hydraulic support, (f) #83 hydraulic support, (g) #92 hydraulic support, (h) #98 hydraulic support, (i) #113 hydraulic support, (j) #128 hydraulic support, (k) #136 hydraulic support, (l) #150 hydraulic support, (m) #166 hydraulic support, and (n) #174 hydraulic support.

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