Rock Mass Classification for Columnar Jointed Basalt: A Case Study of Baihetan Hydropower Station

<table class="table-group" id="tab6"><tr><td><table class="table"><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr class="thead"><td class="align_left">Permeability</td><td class="align_center">Good</td><td class="align_center">Relative good</td><td class="align_center">Moderate good</td><td class="align_center">Relatively bad</td><td class="align_center">Bad</td></tr><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr><td class="align_left">Lugeon</td><td class="align_center">&lt;1.5</td><td class="align_center">1.5~3.7</td><td class="align_center">3.7~8.1</td><td class="align_center">8.1~12</td><td class="align_center">&gt;12</td></tr><tr class="table-tr"><td colspan="6"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Division standard of rock mass permeability.</div>

Geofluids

tab6

Table 6

Table 6: Rock Mass Classification for Columnar Jointed Basalt: A Case Study of Baihetan Hydropower Station 