Influence of Unloading Conditions of Confining Pressure on the Compressive Strength and Permeability of Deep Mudstone

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Buried depth of mudstone</td><td class="align_center">200 m</td><td class="align_center">1000 m</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">Ignition loss</td><td class="align_center">9.280</td><td class="align_center">14.620</td></tr><tr><td class="align_left">SiO<sub>2</sub></td><td class="align_center">62.480</td><td class="align_center">53.360</td></tr><tr><td class="align_left">Al<sub>2</sub>O<sub>3</sub></td><td class="align_center">16.450</td><td class="align_center">24.560</td></tr><tr><td class="align_left">TFe</td><td class="align_center">5.240</td><td class="align_center">3.870</td></tr><tr><td class="align_left">FeO</td><td class="align_center">4.460</td><td class="align_center">2.680</td></tr><tr><td class="align_left">K<sub>2</sub>O</td><td class="align_center">1.458</td><td class="align_center">0.580</td></tr><tr><td class="align_left">Other</td><td class="align_center">0.632</td><td class="align_center">0.330</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Quantitative analysis of composition of mudstone based on fluorescence spectroscopy.</div>

Advances in Civil Engineering

tab2

Table 2

Table 2: Influence of Unloading Conditions of Confining Pressure on the Compressive Strength and Permeability of Deep Mudstone 