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| Research and practice of reflection in-seam wave detection in coal seam flexural structure |
| Xu Bing1， Wang Ji2， Li Gang2 |
| 1. Shanxi Lingzhida Coal Industry Corporation Ltd., Changzhi 046600, China; 2. Xi'an Research Institute, China Coal Technology and Engineer Group Corporation Ltd., Xi’an 710077, China |
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Abstract In order to study reflection effect of deflection in-seam wave and the detection ability of reflection in-seam wave to coal seam deflection, reflection in-seam wave detection experiment was conducted in Lingzhida 15207 working face. Detecting instrument was set in 15209 air return roadway, reflection in-seam wave imaging was used to deal with underground seam data, flexural imaging result of 15207 working face was got. The experiment result showed that coal seam deflection could generate reflected in-seam waves, the reflection in-seam wave technique enabled to effectively detect the position of deflection and the extension in the working face.
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