Study on the Vibration Effect of Short Footage Blasting Load on Surrounding Rock-Support Structure of Tunnel

<table class="table-group" id="tab7"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left">Blasting times</td><td class="align_center">Arch bottom</td><td class="align_center">Arch top</td><td class="align_center">Left arch waist</td><td class="align_center">Right arch waist</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">1</td><td class="align_center">2.629</td><td class="align_center">1.597</td><td class="align_center">1.606</td><td class="align_center">1.605</td></tr><tr><td class="align_left">2</td><td class="align_center">4.127</td><td class="align_center">4.084</td><td class="align_center">4.097</td><td class="align_center">3.123</td></tr><tr><td class="align_left">3</td><td class="align_center">8.580</td><td class="align_center">8.866</td><td class="align_center">8.992</td><td class="align_center">8.873</td></tr><tr><td class="align_left">4</td><td class="align_center">15.735</td><td class="align_center">15.924</td><td class="align_center">15.935</td><td class="align_center">15.928</td></tr><tr><td class="align_left">5</td><td class="align_center">17.738</td><td class="align_center">16.255</td><td class="align_center">17.087</td><td class="align_center">17.146</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Peak value of vibration velocity at each measuring point of profile 5-5 (10<sup>−2</sup> m/sec).</div>

Shock and Vibration

tab7

Table 7

Table 7: Study on the Vibration Effect of Short Footage Blasting Load on Surrounding Rock-Support Structure of Tunnel 