Deflection Laws of Gas Drainage Boreholes in Interbedded Soft and Hard Seams: A Case Study at Xinzheng Coal Mine, China

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left">Technological factors U2</td><td class="align_center">U21</td><td class="align_center">U22</td><td class="align_center">U23</td><td class="align_center">Weight</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">U21</td><td class="align_center">1</td><td class="align_center">1/2</td><td class="align_center">1</td><td class="align_center">0.25</td></tr><tr><td class="align_left">U22</td><td class="align_center">2</td><td class="align_center">1</td><td class="align_center">1</td><td class="align_center">0.5</td></tr><tr><td class="align_left">U23</td><td class="align_center">1</td><td class="align_center">1</td><td class="align_center">1</td><td class="align_center">0.25</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Judgment matrix table U2.</div>

Advances in Civil Engineering

tab3

Table 3

Table 3: Deflection Laws of Gas Drainage Boreholes in Interbedded Soft and Hard Seams: A Case Study at Xinzheng Coal Mine, China 