Excavation Method of Reducing Blasting Vibration in Complicated Geological Conditions

<table class="fixed-width table-group" id="tab5"><tr><td><table class="table"><colgroup><col style="width:10.20em"/><col style="width:10.68em"/><col style="width:7.75em"/></colgroup><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Protected projects</td><td class="align_center">Minimum distance (m) </td><td class="align_center">Standard (cm/s)</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">Generator layer</td><td class="align_center">60</td><td class="align_center">≤2.5</td></tr><tr><td class="align_left">Turbine layers</td><td class="align_center">60</td><td class="align_center">≤2.5</td></tr><tr><td class="align_left">New pouring concrete</td><td class="align_center"> </td><td class="align_center"> </td></tr><tr><td class="align_left"> 0~3 d</td><td class="align_center">54</td><td class="align_center">≤1.5</td></tr><tr><td class="align_left"> 3~7 d</td><td class="align_center">54</td><td class="align_center">≤3.0</td></tr><tr><td class="align_left"> 7~28 d</td><td class="align_center">54</td><td class="align_center">≤7.0</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Safety control standard of blasting vibration in Fengning pumped storage power station.</div>

Shock and Vibration

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Table 5

Table 5: Excavation Method of Reducing Blasting Vibration in Complicated Geological Conditions 