Study on Gas Control in Goaf of High Gas Coal Seam: A Case Study of Tingnan Coal Mine, China

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2">Coal seam</td><td class="align_center" colspan="2">Height of fall belt (m)</td><td class="align_center" colspan="2">Height of crack belt (m)</td></tr><tr class="thead"><td class="align_center">Theoretical value</td><td class="align_center">Actual inspection value</td><td class="align_center">Theoretical value</td><td class="align_center">Actual inspection value</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">4</td><td class="align_center">10.51~14.91</td><td class="align_center">14.4~21.4</td><td class="align_center">21.42~29.42</td><td class="align_center">21.4~40.3</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Theoretical calculation and test results.</div>

Geofluids

tab2

Table 2

Table 2: Study on Gas Control in Goaf of High Gas Coal Seam: A Case Study of Tingnan Coal Mine, China 