Research Article
Focus Energy Determination of Mining Microseisms Using Residual Seismic Wave Attenuation in Deep Coal Mining
Table 1
Variation of the basic characteristic information of the microseismic specimen.
| | Distance (m) | Arrival time (s) | PPV (mm/s) | Amplitude (μm) | Dominant frequency (Hz) | Wave energy (J) | Original | Denoised | Original | Denoised | Original | Denoised | Original | Denoised |
| sw1 | 453.32 | 0.520 | 0.622 | 0.594 | 2.91 | 2.88 | 50.828 | 49.400 | 4928.96 | 4421.40 | sw2 | 480.40 | 0.550 | 0.286 | 0.264 | 2.74 | 2.70 | 33.981 | 32.553 | 845.57 | 786.92 | sw3 | 575.26 | 0.556 | 0.204 | 0.210 | 1.84 | 1.81 | 32.553 | 32.838 | 606.54 | 589.29 | sw4 | 336.77 | 0.576 | 0.465 | 0.458 | 2.64 | 2.48 | 38.835 | 37.407 | 6323.37 | 5781.94 | sw5 | 693.23 | 0.602 | 0.091 | 0.096 | 1.20 | 1.21 | 15.420 | 11.422 | 133.40 | 127.11 | sw6 | 1202.98 | 0.652 | 0.020 | 0.020 | 3.17 | 3.15 | 13.706 | 13.706 | 17.86 | 16.95 | sw7 | 1029.07 | 0.684 | 0.029 | 0.027 | 4.17 | 4.16 | 11.708 | 11.708 | 31.47 | 28.59 | sw8 | 1326.37 | 0.712 | 0.024 | 0.025 | 4.03 | 3.98 | 7.139 | 7.139 | 18.18 | 16.39 | sw9 | 1178.75 | 0.730 | 0.033 | 0.034 | 7.24 | 7.09 | 11.993 | 11.993 | 23.88 | 22.17 | sw10 | 1447.96 | 0.744 | 0.015 | 0.014 | 2.05 | 2.04 | 15.134 | 15.134 | 9.26 | 8.81 |
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magnitude is slightly influenced by the built-in velocity threshold of the monitoring firmware. |