Study on Combined Energy Absorption Support for Rockburst Disaster Control in Tunnelling

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Condition</td><td class="align_center">Loading method</td><td class="align_center">Specimen</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">1</td><td class="align_center">Nonenergy storage, slow loading</td><td class="align_center">Cylindrical concrete</td></tr><tr><td class="align_left">2</td><td class="align_center">Nonenergy storage, fast loading</td><td class="align_center">Cylindrical concrete</td></tr><tr><td class="align_left">3</td><td class="align_center">Energy storage, slow loading</td><td class="align_center">Cylindrical concrete</td></tr><tr><td class="align_left">4</td><td class="align_center">Energy storage, fast loading</td><td class="align_center">Cylindrical concrete</td></tr><tr><td class="align_left">5</td><td class="align_center">Energy storage, slow loading</td><td class="align_center">Cylindrical concrete + PVC pipe (C-1)</td></tr><tr><td class="align_left">6</td><td class="align_center">Energy storage, slow loading</td><td class="align_center">Cylindrical concrete + PVC pipe + iron hoop (C-2)</td></tr><tr><td class="align_left">7</td><td class="align_center">Energy storage, slow loading</td><td class="align_center">Cylindrical concrete + PVC pipe + iron hoop + rubber (C-3)</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr><tr class="table-fn"><td><div>Note: The loading speed of slow loading is about 0.35 MPa·s<sup>−1</sup> according to the “Standard for test method of mechanical properties on ordinary concrete” in China. The fast loading speed is 5 times that of slow loading.<br/></div></td></tr></table>

Shock and Vibration

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Table 1

Table 1: Study on Combined Energy Absorption Support for Rockburst Disaster Control in Tunnelling 