Analysis of Influence of Ultra-High Pressure Water Jet Cutting Pressure Sequence on Pressure Relief and Reflection Improvement of Coal Seam

<div>Fracture and stress distribution of coal seam after drilling. (a) Distribution of fractures. (b) Stress distribution condition.</div>

Advances in Civil Engineering

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Figure 9

Figure 9: Analysis of Influence of Ultra-High Pressure Water Jet Cutting Pressure Sequence on Pressure Relief and Reflection Improvement of Coal Seam 

Figure 9 | Analysis of Influence of Ultra-High Pressure Water Jet Cutting Pressure Sequence on Pressure Relief and Reflection Improvement of Coal Seam 