反射槽波探测采空巷道的实验与方法研究

对利用反射槽波探测工作面内异常构造展开实验研究，针对实际井下地震数据中反射槽波受直达槽波与其他波场干扰严重的问题，提出了基于最小平方反褶积的反射槽波增强算法和基于径向道变换的方法压制直达槽波与巷道声波，并用绕射偏移的方法获得工作面内巷道的成像结果。实验结果表明：槽波传播过程中遇采空巷道能够产生较强的反射槽波，通过处理可获得采空巷道的成像结果；反射槽波的传播距离可达360 m以上，探测距离可达200 m以上。

Experiment and method of void roadway detection using reflected in-seam wave

An experiment on using reflected in-seam wave to detect abnormal geological structure in a working face was conducted.To overcome the interference of direct in-seam wave and other types of waves to the reflected in-seam wave，an enhancement method was proposed based on the least squares deconvolution algorithm to focus the reflected in-seam wave.The radial trace transformation and filtering were used to suppress the direct wave and the sound wave.An image of a roadway in the tested working face was generated by diffract migration.The results show that the reflected in-seam wave can be generated when the propagating in-seam waves encounter with a void roadway and the roadway can be imaged after the data are processed.The propagation distance of the reflected inseam is over 360 m，and the detection range is over 200 m.