Fig. 1. Main view of GMO analysis tool (Ver 2.0).
Fig. 3. Combined Microseismic data of Yuil mine.
Fig. 2. Microseismic data of Yuil mine (BH 2).
Fig. 5. Automatic picking of the first arrivals of P-waves using STA/LTA algorithm.
Fig. 4. Effective range setting of the first arrival picking for P-waves.
Fig. 6. Inversion results using the first arrival times of P-waves.
Fig. 7. P-waves hodogram obtained from 3-component geophone.
Fig. 8. S-waves hodogram obtained from 3-component geophone.
Fig. 9. Results of polarization filter and automatic picking. (Left) Original signal, (Right) Polarization filter applied signal.
Fig. 10. Microseismic 3-component raw data (a) and their polarization filtered data (b). Effective range setting enables proper first arrival S-wave acquisition.
Fig. 11. Initial configuration setting menu for location inversion.
Fig. 12. Inversion results using the first arrival times of P- and S- waves.
Fig. 13. The area coefficient of Yuil mine for calculating microseismic magnitude.
Fig. 14. Microseismic magnitude of Yuil mine in case of using 1 g detonator.
Fig. 16. Three-dimensional diagram of inversion results.
Fig. 15. Inversion result and satellite photo overlays.
Table 1. Program development environment.
Table 2. Inversion results using the first arrival times of P-waves.
Table 3. Inversion results using the first arrival times of P-and S-waves.
Table 4. Equivalent explosive energy release, fault/fracture size and slip for different magnitude values (Maxwell, 2014).
Table 5. Magnitude values according to explosive energy in Yuil mine.
References
- Flinn, E. A., 1965, Signal analysis using rectilinearity and direction of particle motion, Proc. IEEE, 53(11), 1874-1876. https://doi.org/10.1109/PROC.1965.4462
- Gibowicz, S. J., and Kijko, A., 1994, An introduction to mining seismology, Academic Press.
- Kim, C. O., Um, W. Y., Chung, S. K., and Cheon, D. S., 2016, Case study of microseismic techniques for stability analysis of pillars in a limestone mine, Tunnel & Underground Space, 26(1), 1-11. https://doi.org/10.7474/TUS.2016.26.1.001
- Kim, M. S., Byun, J. M., and Seol, S. J., 2010, Study on micorseismic monitoring method for enhanced oil recovery (EOR), Journal of the Korean Society for Geosystem Engineering, 47(6), 871-879. In Korean with English abstracts
- Lee, G. H., Lee, K., Shin, C. H., and Kim, Y. W., 2014, Microseismic monitoring in shale gas development: A report, J. Korea Inst. Mineral Mining Eng., 51(2), 285-297 (in Korean with English abstract).
- Maxwell, S., 2014, Microseismic Imaging of Hydraulic Fracturing: Improved Engineering of Unconventional Shale Reservoirs, Society of Exploration Geophysicists Distinguished Instructor Series, No. 17.
- Montalbetti, J. F., and Kanasewich, E. R., 1970, Enhancement of teleseismic body phases with a polarization filter, Geophys. J. R. Astr. Soc., 21, 119-129. https://doi.org/10.1111/j.1365-246X.1970.tb01771.x
- Sheen, D. H., Cho, C. S., and Lee, H. I., 2013, Microseismic monitoring using seismic mini-array, Geophys. and Geophys. Explor., 16(1), 53-58 (in Korean with English abstract). https://doi.org/10.7582/GGE.2013.16.1.53