Study on Sound Propagation Performance of Mechanized Coal Gangue-Fine Sand Filling Body

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr class="thead"><td class="align_left">Specific gravity</td><td class="align_center">Loose bulk density (kN·m⁻<sup>3</sup>)</td><td class="align_center">Dense bulk density (kN·m⁻<sup>3</sup>)</td><td class="align_center">Maximum porosity (%)</td><td class="align_center">Minimum porosity (%)</td><td class="align_center">Angle of repose (°)</td></tr><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr><td class="align_left">3.11</td><td class="align_center">9.528</td><td class="align_center">17.271</td><td class="align_center">68.63</td><td class="align_center">43.15</td><td class="align_center">30.40</td></tr><tr class="table-tr"><td colspan="6"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Physical properties of P⋅O 42.5 grade cement.</div>

Shock and Vibration

tab3

Table 3

Table 3: Study on Sound Propagation Performance of Mechanized Coal Gangue-Fine Sand Filling Body 