基于克希霍夫偏移的槽波超前探测方法及应用

为查明邢台矿区葛泉矿1199工作面掘进巷前方地质构造，采用井下槽波地震进行超前探测，用线性拉东变换提取来自巷道前方的反射波，在时间域内进行速度分析获得围岩参数信息，通过克希霍夫偏移对巷道前方地质异常体成像。结果显示，掘进巷前方距离G12检波点205 m与237 m存在异常，分别对应采空巷道与SF4断层；通过速度分析提取速度参数，初步判断SF4含水。钻探验证结果表明，克希霍夫偏移方法能对掘进巷前方断层异常体进行成像。 

Channel wave advanced detection method based on Kirchhoff migration and its application

In order to detect the geological structures in the front of the working face 1199 in Gequan mine of Xingtai mining area, underground channel wave seismic exploration was used to conduct advanced detection, linear Radon transform was used to extract the reflection wave from the front of the roadway, parameter information of the surrounding rocks were obtained through velocity analysis in time domain, The abnormal geological bodies in the front of the roadway were imaged through Kirchhoff migration. The results indicated that there existed anomalies at 205 m and 237 m away from the geophone point G12 in the front of the excavating roadway, corresponding to the mined-out roadway and the fault SF4 respectively; The velocity parameters were extracted through velocity analysis, it was judged preliminarily that SF4 was water-bearing. The drilling verification results showed that Kirchhoff migration method can image the faults in front of the roadway.