Theoretical Study and Experiment Validation on Drilling Cutting Weight during the Whole Process of Drilling

<table class="table-group" id="tab8"><tr><td><table class="table"><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr class="thead"><td class="align_left">UCS (MPa)</td><td class="align_center">Young’s modulus (GPa)</td><td class="align_center">Poisson’s ratio</td><td class="align_center">Internal friction angle</td><td class="align_center">Density</td><td class="align_center"><i>n</i><sub>1</sub></td><td class="align_center"><i>m</i></td></tr><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr><td class="align_left">12.0</td><td class="align_center">0.26</td><td class="align_center">0.45</td><td class="align_center">30°</td><td class="align_center">1240.0 kg/m<sup>3</sup></td><td class="align_center">1.1</td><td class="align_center">−0.45</td></tr><tr class="table-tr"><td colspan="7"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>The mechanical parameters of coal body in Longfeng Coal Mine.</div>

Shock and Vibration

tab8

Table 8

Table 8: Theoretical Study and Experiment Validation on Drilling Cutting Weight during the Whole Process of Drilling 