Study on Pore and Fissure Structure Characteristics of Deep Soft Coal Rock

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="8"><hr/></td></tr><tr class="thead"><td class="align_left">Coal sample</td><td class="align_center">Mad (%)</td><td class="align_center">Ad (%)</td><td class="align_center">Vdaf (%)</td><td class="align_center">Std (%)</td><td class="align_center">Qgrad (MJ/kg)</td><td class="align_center">GR·I</td><td class="align_center">CR·C (1-8)</td></tr><tr><td class="thead-hr" colspan="8"><hr/></td></tr><tr><td class="align_left" rowspan="2">Large coal</td><td class="align_center"><span style="width: 58.5535ptpx;"><svg height="8.55521pt" id="M1" style="vertical-align:-0.2063904pt" version="1.1" viewbox="-0.0498162 -8.34882 58.5535 8.55521" width="58.5535pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M241 635C89 635 35 457 35 312C35 153 89 -12 240 -12C390 -12 443 166 443 312C443 466 390 635 241 635ZM238 602C329 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<div>Raw coal industry analysis results.</div>

Geofluids

tab1

Table 1

Table 1: Study on Pore and Fissure Structure Characteristics of Deep Soft Coal Rock 