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

<div>Schematic diagram of test schemes. (a) Specimens with different drilling diameters. (b) Specimens with different numbers of drilling holes. (c) Specimens with different numbers of drilling rows.</div>

Advances in Civil Engineering

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Figure 2

Figure 2: Numerical Investigation of Influences of Drilling Arrangements on the Mechanical Behavior and Energy Evolution of Coal Models 