Progressive Failure and Acoustic Emission Characteristics of Red Sandstone with Different Geometry Parallel Cracks under Uniaxial Compression Loading

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">Resonant frequency</td><td class="align_center">100–400 kHz</td></tr><tr><td class="align_left">Sampling frequency</td><td class="align_center">10<sup>6</sup> s</td></tr><tr><td class="align_left">Threshold value</td><td class="align_center">40 dB</td></tr><tr><td class="align_left">Floating threshold value</td><td class="align_center">5 dB</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Advances in Materials Science and Engineering

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Table 2

Table 2: Progressive Failure and Acoustic Emission Characteristics of Red Sandstone with Different Geometry Parallel Cracks under Uniaxial Compression Loading 

Table 2 | Progressive Failure and Acoustic Emission Characteristics of Red Sandstone with Different Geometry Parallel Cracks under Uniaxial Compression Loading 