Research on Acoustic Emission Characteristics and Constitutive Model of Rock Damage Evolution with Different Sizes

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td class="align_left">Parameter</td><td class="align_center">Magnitude</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">Minimum particle size (mm)</td><td class="align_center">0.3</td></tr><tr><td class="align_left">Particle size ratio</td><td class="align_center">1.66</td></tr><tr><td class="align_left">Density (kg m<sup>−3</sup>)</td><td class="align_center">2620</td></tr><tr><td class="align_left">Particle contact modulus (GPa)</td><td class="align_center">7.0</td></tr><tr><td class="align_left">Deformation modulus of parallel bonding (GPa)</td><td class="align_center">60</td></tr><tr><td class="align_left">Porosity</td><td class="align_center">0.1</td></tr><tr><td class="align_left">Coefficient of friction</td><td class="align_center">0.78</td></tr><tr><td class="align_left">Tensile strength of parallel bonding (MPa)</td><td class="align_center">58</td></tr><tr><td class="align_left">Parallel bonding cohesion (MPa)</td><td class="align_center">128</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Meso-mechanical parameters of sandstone physical mechanics.</div>

Advances in Civil Engineering

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Table 1

Table 1: Research on Acoustic Emission Characteristics and Constitutive Model of Rock Damage Evolution with Different Sizes 