Study on Wave Field Characteristics and Imaging of Collapse Column in Three-Dimensional Detection with Love Channel Wave Reflected outside the Working Face
- 1 China University of Mining and Technology, School of Resources and Geophysics, Xuzhou, China
- 2 Shang Dong Energy Linyi Group Luxi Coalmine, Jining, China
- 3 Kaijia Group Yitang Changyuan Coalmine, Jiexiu, China
- 4 China University of Mining and Technology, School of Mechanics and Civil Engineering, Xuzhou, China
- 5 China University of Mining and Technology, School of Resources and Geophysics, Xuzhou, China
- 6 China University of Mining and Technology, School of Mechanics and Civil Engineering, Xuzhou, China
- 7 China University of Mining and Technology, School of Mechanics and Civil Engineering, Xuzhou, China
Abstract
The safety accidents caused by collapse column water diversion occur frequently, which has great hidden danger to the safety production of coal mine. Limited by the space of underground, the detection of collapse column on the outside of working face has been a difficult problem. Based on this, numerical simulation and imaging research were carried out in this paper. The results indicate that when a seismic source near the roadway is excited, a part of seismic wave propagates along the roadway direction, namely direct P-wave, direct S-wave and direct Love channel wave. When the body waves and Love channel wave propagating to the outside of working face meet the interface of collapse column, the reflected Love channel wave and reflected body waves are generated. Reflection body waves and direct waves are mixed in time domain, which is difficult to identify in seismic records, while reflected Love channel wave whose amplitude is relatively strong. The reflected Love channel wave which has a large interval from other wave trains in the time domain is easily recognizable in seismic record, which makes it suitable for advanced detection of collapse column. The signal-to-noise ratio of X component is higher than that of Y component and Z component. According to the seismic records, polarization filtering was carried out to enhance the effective wave, which removed the interference waves, and the signal was migrated to get the position parameters of collapse column interface, which was basically consistent with the model position.
- Wu, Q., Cui, F.P., Zhao, S.Q., Liu, S.Q., Zeng, Y.F. and Gu, Y.W. (2013) Type Classification and Main Characteristics of Mine Water Disasters. Journal of China Coal Society, 4, 561-565. https://doi.org/10.13225/j.cnki.jccs.2013.04.015
- Dong, S.N. (2010) Some Key Scientific Problems on Water Hazards Frequently Happened in China’s Coal Mines. Journal of China Coal Society, 35, 66-71. https://doi.org/10.13225/j.cnki.jccs.2010.01.019
- Chang, Z.J., Wei, W., Fu, L.Y., Qin, N., Su, J. and Sun, W.J. (2020) Focal Beam Resolution Analysis of Wide-Band, Wide-Azimuth and High-Density Land 3D Seismic Acquisition Geometries. Chinese Journal of Geophysics, 63, 3868-3885. https://doi.org/10.6038/cjg2020N0114
- Yuan, L. and Zhang, S.P. (2019) Development Status and Prospect of Geological Guarantee Technology for Precise Coal Mining. Journal of China Coal Society, 44, 2277-2284. https://doi.org/10.13225/j.cnki.jccs.KJ19.0571
- Liu, S.D., Liu, J. and Yue, J.H. (2014) Development Status and Key Problems of Chinese Mining Geophysical Technology. Journal of China Coal Society, 39, 19-25. https://doi.org/10.13225/j.cnki.jccs.2013.0587
- Cheng, J.L., Li, F. and Peng, S.P. (2014) Research Progress and Development Direction on Advanced Detection in Mine Roadway Working Face Using Geophysical Methods. Journal of China Coal Society, 39, 1742-1750. https://doi.org/10.13225/j.cnki.jccs.2014.9007
- Ji, G.Z., Cheng, J.Y., Hu, J.W., Wang, J., Li, G. and Wang, B.L. (2014) In-Seam Wave Imaging Using Attenuation Coefficient: Method and Application. Journal of China Coal Society, 39, 471-475. https://doi.org/10.13225/j.cnki.jccs.2013.1672
- Hu, G.Z., Teng, J.W., Pi, J.L., Wang, W. and Qiao, Y.H. (2013) In-Seam Seismic Exploration Techniques—A Geophysical Method Predicting Coal-Mine Disaster. In: Rabinovich, A.B., Ed., Progress in Geophysics, Springer, Berlin, 439-451.
- Wang, J., Li, J.Z., Wu, H. Wang, B.L., Hu, J.W. and Ji, G.Z. (2015) Tomography of Transmission In-Seam Wave Attenuation Coefficient and Detection of Collapse Columns. Coal Science and Technology, 43, 108-111. https://doi.org/10.13199/j.cnki.cst.2015.01.026
- Li, G.Y., Jiao, Y., Wei, J.S., Tan, J., Dou, W.W. and Li, Z.Y. (2018) Application of Channel Wave Seismic Transmission Method in Detection of Collapse Columns. Shanxi Coal, 38, 35-38. https://doi.org/10.3969/j.issn.1672-5050.2018.06.009
- Ma, X., Yang, S.T., Li, X.F., Guo, X.D., Bai, J.L., Wen, Z.J. and Zhang, L. (2019) Simulation Study on Detection of Collapse Column in Coal Face Based on Transmitted Slot Wave. Safety in Coal Mines, 50, 32-36. https://doi.org/10.13347/j.cnki.mkaq.2019.04.008