Study on Pretightening Loss Effect of Bolt Support in Deep Soft Rock Roadway

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Bolt diameter (mm)</td><td class="align_center">Nut outer diameter <i>R</i> (mm)</td><td class="align_center">Nut inner diameter <i>r</i> (mm)</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">16</td><td class="align_center">19</td><td class="align_center">8</td></tr><tr><td class="align_left">18</td><td class="align_center">20</td><td class="align_center">9</td></tr><tr><td class="align_left">20</td><td class="align_center">21</td><td class="align_center">10</td></tr><tr><td class="align_left">22</td><td class="align_center">24</td><td class="align_center">11</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Shock and Vibration

tab2

Table 2

Table 2: Study on Pretightening Loss Effect of Bolt Support in Deep Soft Rock Roadway 