Numerical Investigation of Influences of Drilling Arrangements on the Mechanical Behavior and Energy Evolution of Coal Models

<div>Stress-strain curves of specimens with different drilling arrangements under uniaxial compression. (a) Different drilling diameters. (b) Different numbers of drilling holes. (c) Different numbers of drilling rows.</div>

Advances in Civil Engineering

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Figure 5

Figure 5: Numerical Investigation of Influences of Drilling Arrangements on the Mechanical Behavior and Energy Evolution of Coal Models 