Study on the Damage Model of Coal Rock Caused by Hydraulic Pressure and Electrical Impulse in Borehole

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left">Permeability coefficient (m/s)</td><td class="align_center">Filtration coefficient (m/pas)</td><td class="align_center">Fracturing fluid viscosity (pas)</td><td class="align_center">Peak displacement (m<sup>2</sup>/s)</td><td class="align_center">Natural fracture angle (°)</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">1e-7</td><td class="align_center">1e-14</td><td class="align_center">0.001</td><td class="align_center">0.002</td><td class="align_center">0</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Physical parameters of coal-rock mass.</div>

Geofluids

tab4

Table 4

Table 4: Study on the Damage Model of Coal Rock Caused by Hydraulic Pressure and Electrical Impulse in Borehole 