Stability Mechanism and Control Factors on Equipment Removal Area under “Goaf-Roof-Coal” Structure

<div>Internal stress of rock beam above the removal area. (a) <i>σ</i><sub>max</sub>. (b) <i>τ</i><sub>max</sub>.</div>

Advances in Civil Engineering

Figure 5: Stability Mechanism and Control Factors on Equipment Removal Area under “Goaf-Roof-Coal” Structure 