Study on Stability Control of Retained Gob-Side Entry by Blasting Fracturing Roof Technology in Thick Immediate Roof

<table class="table-group" id="tab5"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left">Strain</td><td class="align_center">0</td><td class="align_center">1e-4</td><td class="align_center">5e-3</td><td class="align_center">2e-3</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">Cohesion (MPa)</td><td class="align_center">2e6</td><td class="align_center">2</td><td class="align_center">1.6</td><td class="align_center">1</td></tr><tr><td class="align_left">Friction angle (°)</td><td class="align_center">26</td><td class="align_center">24</td><td class="align_center">23</td><td class="align_center">22</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Strain-softening parameters of coal.</div>

Shock and Vibration

tab5

Table 5

Table 5: Study on Stability Control of Retained Gob-Side Entry by Blasting Fracturing Roof Technology in Thick Immediate Roof 