Numerical Assessment on Unloading Disturbance and Gas Extraction in Remote Distance Protective Layer Mining

<table class="table-group" id="tab5"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left">Borehole</td><td class="align_center">Residual gas pressure (MPa)</td><td class="align_center">Borehole</td><td class="align_center">Residual gas pressure (MPa)</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">P<sub>q1</sub></td><td class="align_center">0.45</td><td class="align_center">P<sub>z1</sub></td><td class="align_center">0.31</td></tr><tr><td class="align_left">P<sub>q2</sub></td><td class="align_center">0.39</td><td class="align_center">P<sub>z2</sub></td><td class="align_center">0.29</td></tr><tr><td class="align_left">P<sub>q3</sub></td><td class="align_center">0.34</td><td class="align_center">P<sub>z3</sub></td><td class="align_center">0.22</td></tr><tr><td class="align_left">P<sub>q4</sub></td><td class="align_center">0.29</td><td class="align_center">P<sub>z4</sub></td><td class="align_center">0.26</td></tr><tr><td class="align_left">P<sub>q5</sub></td><td class="align_center">0.30</td><td class="align_center">P<sub>z5</sub></td><td class="align_center">0.20</td></tr><tr><td class="align_left">P<sub>q6</sub></td><td class="align_center">0.36</td><td class="align_left"></td><td class="align_left"></td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Residual gas pressure in inspection boreholes.</div>

Geofluids

tab5

Table 5

Table 5: Numerical Assessment on Unloading Disturbance and Gas Extraction in Remote Distance Protective Layer Mining 