Advances in Civil Engineering / 2020 / Article / Tab 14

Research Article

Estimation of Rock Burst Grades Using Rock Mass Strength

Table 14

Various criteria for rock burst estimation.

Barton’s criterionRehman’s criterionTao’s criterionCHEGI’s criterionModified criterion in this study
SRFRock burst gradeSRFQRock burst gradeRock burst gradeRock burst gradeRock burst grade

2.5∼55∼10Mild5∼10Mild5.5∼14.5Slight4∼7Slight>0.167Slight
2.5∼5.5Medium2∼4Medium0.066∼0.167Medium
<2.510∼20Heavy10∼20Heavy1∼2Strong0.012∼0.066Strong
<2.5Heavy<1Violent≤0.012Violent

SRF and SRFQ are stress reduction factor and modified stress reduction factor, respectively.

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