Dynamic Fracture Toughness and Dynamic Tensile Strength of the Rock from Different Depths of Beijing Datai Well

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="8"><hr/></td></tr><tr class="thead"><td class="align_left">Diameter of the bar (mm)</td><td class="align_center">Length of the input bar (mm)</td><td class="align_center">Length of the output bar (mm)</td><td class="align_center">Elastic modulus (GPa)</td><td class="align_center">Longitudinal wave velocity</td><td class="align_center">Poisson ratio</td><td class="align_center">Pressure (MPa)</td><td class="align_center">Density (kg·m<sup>−3</sup>)</td></tr><tr><td class="thead-hr" colspan="8"><hr/></td></tr><tr><td class="align_left">75</td><td class="align_center">2000</td><td class="align_center">2000</td><td class="align_center">250</td><td class="align_center">5400</td><td class="align_center">0.285</td><td class="align_center">0∼10</td><td class="align_center">7810</td></tr><tr class="table-tr"><td colspan="8"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Advances in Civil Engineering

tab2

Table 2

Table 2: Dynamic Fracture Toughness and Dynamic Tensile Strength of the Rock from Different Depths of Beijing Datai Well 