Comprehensive Measurement of the Deformation and Failure of Floor Rocks: A Case Study of the Xinglongzhuang Coal Mine

<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">Borehole parameters</td><td class="align_left"></td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">Opening diameter (mm)</td><td class="align_center">110</td></tr><tr><td class="align_left">Diameter (mm)</td><td class="align_center">80</td></tr><tr><td class="align_left">Borehole elevation angle (°)</td><td class="align_center">75</td></tr><tr><td class="align_left">Angle between the drilling hole and the strike line of the coal and rock seam</td><td class="align_center">90</td></tr><tr><td class="align_left">Hole depth (m)</td><td class="align_center">38.3</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Design parameters of the boreholes.</div>

Geofluids

tab1

Table 1

Table 1: Comprehensive Measurement of the Deformation and Failure of Floor Rocks: A Case Study of the Xinglongzhuang Coal Mine 