Experimental Study on Comprehensive Real-Time Methods to Determine Geological Condition of Rock Mass along the Boreholes while Drilling in Underground Coal Mines

<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 class="align_left">Item</td><td class="align_center">Value</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">Maximum channel number</td><td class="align_center">5</td></tr><tr><td class="align_left">Minimum sampling period</td><td class="align_center">0.5 s</td></tr><tr><td class="align_left">Overall power consumption</td><td class="align_center">7.5 watt</td></tr><tr><td class="align_left">Data transfer mode</td><td class="align_center">USB or Wi-Fi</td></tr><tr><td class="align_left">Battery life per recharging cycle</td><td class="align_center">8 hours</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Main parameters of the MWD system.</div>

Shock and Vibration

tab1

Table 1

Table 1: Experimental Study on Comprehensive Real-Time Methods to Determine Geological Condition of Rock Mass along the Boreholes while Drilling in Underground Coal Mines 

Table 1 | Experimental Study on Comprehensive Real-Time Methods to Determine Geological Condition of Rock Mass along the Boreholes while Drilling in Underground Coal Mines 