Rock Load Estimation in Development Galleries and Junctions for Underground Coal Mines: A CMRI-ISM Rock Mass Rating Approach

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td align="left">Parameter</td><td align="center">Maximum rating</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td align="left">Layer thickness (cm)</td><td align="center">30</td></tr><tr><td align="left">Structural features</td><td align="center">25</td></tr><tr><td align="left">Weatherability (1st cycle slake durability index)</td><td align="center">20</td></tr><tr><td align="left">Compressive strength (Kg/cm<sup>2</sup>)</td><td align="center">15</td></tr><tr><td align="left">Groundwater condition (mL/min)</td><td align="center">10</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Journal of Mining

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Table 1

Table 1: Rock Load Estimation in Development Galleries and Junctions for Underground Coal Mines: A CMRI-ISM Rock Mass Rating Approach 