Channel wave tomographic imaging method and its application in detection of collapse column in coal

DOI

10.2991/iceeg-16.2016.41How to use a DOI?

Keywords

collapse column, channel wave, dispersion analysis, tomographic imaging

Abstract

Coal seam seismic survey collapse column is common in heterogeneous geologic bodies. Groud-3D seismic observation due to limitations of its accuracy, for uneven geological subsided column often small leakage test or position error is large, the impact of mining coal mine safety sometimes causing heavy casualties. Downhole observation of channel wave transmission is one of the most effective ways to detect the small anomalous bodies within mine working face. Transmission experiments carried on at the king coal mine working face, in SHANGXI province, with 56 excitation points at lane and 48 receiving points at next lane arranged , its interval distance is 150m along roadway. 1344 airy phrase travel time are picked through the dispersion analysis and tomographic inversion calculation of velocity and absorption coefficient is carried out. The distribution diagram of group velocity and absorption coefficient of the channel wave is built which obtain 10 anomalous bodies discovered and excluding the other collapse columns delineated by the three-dimensional seismic exploration in the test areas. There are number 1-9 collapse columns among the 10 anomalous bodies, Number 1-9 collapse columns are verified by the result of actual mining, and the location all deviation is less than 10m. Number 1, 6and 7 collapse columns are exposed by the roadways. Number 6 collapse column has a 40m's extending length into the mining face. Number 7 collapse column has a 20m's extending length into the mining face. Number 4 collapse column has 50m's major axis and 30m's minor axis. This is consistent with the location of the collapse column DX4 given by 3D seismic exploration. There is no abnormal of the collapse column DX5 and DX6 in the result of tomographic inversion, which is exposed by 3D seismic exploration. The existence of Number 2-5 collapse columns seriously influences the coal mining safety. Concerning the geological condition exposed by the roadways, the production scheme has been modified to ensure high production and high productivity and safety of mine.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Wei Wang
AU  - Guoqiang Xue
AU  - Xing Gao
AU  - Jiwen Teng
AU  - Huanyu Cui
PY  - 2016/06
DA  - 2016/06
TI  - Channel wave tomographic imaging method and its application in detection of collapse column in coal
BT  - Proceedings of the 7th International Conference on Environment and Engineering Geophysics & Summit Forum of Chinese Academy of Engineering on Engineering Science and Technology
PB  - Atlantis Press
SP  - 148
EP  - 151
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceeg-16.2016.41
DO  - 10.2991/iceeg-16.2016.41
ID  - Wang2016/06
ER  -