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

<div>Simplified model of the coal pillar in L-shaped zone: (a) superimposed support pressure of the coal pillar in the L-shaped area; (b) A-A′ section.</div>

Shock and Vibration

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Figure 3

Figure 3: Study on Occurrence Mechanism of Coal Pillar in L-Shaped Zone during Fully Mechanized Mining Period and Prevention Technology 