Study on Occurrence Mechanism of Coal Pillar in L-Shaped Zone during Fully Mechanized Mining Period and Prevention Technology

Figure 10

Stress-strain curves of coal pillar under dynamic and static combined load: (a) stress-strain curves for superimposed disturbances with the same static load and different dynamic loads; (b) stress-strain curve for superimposed disturbance of the same dynamic load with different static loads; (c) peak point stress-strain curve.

(a)

(b)

(c)