A New Method to Improve the Fracturing Effect of Coal Seams by Using Preset Slots and Induced Stress Shadows

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Material properties</td><td class="align_center">Value</td><td class="align_center">Unit</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">Young’s modulus</td><td class="align_center">8.4</td><td class="align_center">GPa</td></tr><tr><td class="align_left">Poisson’s ratio</td><td class="align_center">0.23</td><td class="align_center">—</td></tr><tr><td class="align_left">Tensile strength</td><td class="align_center">2.55</td><td class="align_center">MPa</td></tr><tr><td class="align_left">Injection rate</td><td class="align_center">1.3</td><td class="align_center">ml/s</td></tr><tr><td class="align_left">Viscosity</td><td class="align_center">1</td><td class="align_center">cP</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Parameters used in the simulation of lab-scale hydraulic fracture propagation.</div>

Geofluids

tab1

Table 1

Table 1: A New Method to Improve the Fracturing Effect of Coal Seams by Using Preset Slots and Induced Stress Shadows 