Table 4 Comparison of measured and theoretical critical depths for rock burst occurrence in some coal mines.
From: Roadway rock burst prediction based on catastrophe theory
Name of coal mine | Elastic modulus \(E({\text{GPa)}}\) | Poisson's ratio \(\mu\) | Uniaxial compressive strength \(\sigma_{{\text{c}}} ({\text{MPa)}}\) | Critical mining depth | |||||
|---|---|---|---|---|---|---|---|---|---|
Theoretical values | Pan Yishan’s theoretical values | Measured statistical values | The discrepancy with the statistical values % | The discrepancy in the theory with Pan Yishan % | |||||
Qi | Longfeng Mine | 3 | 0.3 | 9 | 376 | 351 | 350 | 6.91 | 6.65 |
Tianchi Mine | 2.4 | 0.28 | 12 | 424 | 418 | 395 | 6.84 | 1.42 | |
Mentougou Mine | 8.2 | 0.29 | 14 | 302 | 397 | 200 | 33.77 | 31.46 | |
Taozhuang Mine | 5.6 | 0.35 | 18 | 524 | 540 | 480 | 8.40 | 3.05 | |
Tangshan Mine | 7.8 | 0.29 | 10 | 518 | 426 | 500 | 3.47 | 17.76 | |
Dongtan Mine | 3.97 | 0.32 | 14.5 | 548 | 483 | 586 | 6.93 | 11.86 | |
He | Changcun Mine | 7 | 0.38 | 12.86 | 699 | 896 | 669 | 4.29 | 28.18 |
Cao | Zhangshuanglou Mine | 5.04 | 0.38 | 19.66 | 697 | 910 | 850 | 21.95 | 30.56 |
Zhang | Dongbaowei Mine | 2.23 | 0.35 | 11.47 | 762 | 919 | 686 | 9.97 | 20.60 |
Li | Hongyangsan Mine | 4.1 | 0.14 | 7.51 | 817 | 990 | 1082 | 32.44 | 21.18 |
Wang | Zhaoxian Mine | 5.94 | 0.27 | 13.47 | 925 | 880 | 792 | 14.38 | 4.86 |
Feng | Hongqinghe Mine | 6.0 | 0.3 | 29.56 | 1209 | 1129 | 746 | 33.92 | 14.53 |
Zhao | Jixian Mine | 6.08 | 0.3 | 7.33 | 823 | 871 | 689 | 16.28 | 5.83 |
Du | Yizhouyao Mine | 2.29 | 0.243 | 26 | 742 | 737 | 550 | 25.87 | 0.67 |
