Study on the Porosity of Saturated Fragmentized Coals during Creep Process and Constitutive Relation

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2">Parameter</td><td class="align_center" colspan="5">Grain size</td></tr><tr class="thead"><td class="align_center">m1</td><td class="align_center">m2</td><td class="align_center">m3</td><td class="align_center">m4</td><td class="align_center">m5</td></tr><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr><td class="align_left">K1 (MPa)</td><td class="align_center">27.1675</td><td class="align_center">32.84006</td><td class="align_center">35.049762</td><td class="align_center">35.8090186</td><td class="align_center">59.8890943</td></tr><tr><td class="align_left">K2 (MPa)</td><td class="align_center">964.286</td><td class="align_center">586.9565</td><td class="align_center">790.2439</td><td class="align_center">3056.60377</td><td class="align_center">733.031674</td></tr><tr><td class="align_left"><i>η</i> (MPa·s)</td><td class="align_center">5.4 <i>E</i> + 07</td><td class="align_center">67363268</td><td class="align_center">86390175</td><td class="align_center">351439009</td><td class="align_center">63883287.3</td></tr><tr class="table-tr"><td colspan="6"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Kelvin–Voigt model parameter table of fragmentized coals with different grain sizes under the stress of 12 MPa.</div>

Advances in Civil Engineering

tab3

Table 3

Table 3: Study on the Porosity of Saturated Fragmentized Coals during Creep Process and Constitutive Relation 