Failure Mechanisms and the Control of a Longwall Face with a Large Mining Height within a Shallow-Buried Coal Seam

<div>Comparison of failure modes of the 12401 coal wall. (a) Before increasing the strength of the shield. (b) After strengthening the strength of the shield.</div>

Shock and Vibration

fig9

Figure 9

Figure 9: Failure Mechanisms and the Control of a Longwall Face with a Large Mining Height within a Shallow-Buried Coal Seam 