Study on Pressure Relief Technology of High-Pressure Water Jet of Residual Coal Pillar in Overlying Goaf in Close Seam Mining

<div>Load transfer before and after the weakening of the residual coal pillar. (a) Before weakening. (b) After weakening.</div>

Shock and Vibration

Figure 10: Study on Pressure Relief Technology of High-Pressure Water Jet of Residual Coal Pillar in Overlying Goaf in Close Seam Mining 