【摘要】 由于近露头倾斜煤层可能受到风化带影响，煤岩层的富水性增强，电阻率值将降低，影响无线电波透视探查效果。为提高近风化带煤层工作面探查精度，对研究区煤层进行了数值模拟和淮南谢桥矿现场探测应用研究。数值模拟结果表明，近露头侧煤层对无线电波吸收系数较大，两侧巷道接收场强值差异达11～17 dB,双侧数据吸收系数反演难以反映地质异常，而单侧数据吸收系数反演效果显著优化，结果与地质模型较为吻合。现场探测结果表明：回风巷接收场强值较机巷高约12 dB,采用两巷探测场强数据反演结果对地质异常反映不明显；采用回风巷单侧接收数据吸收系数反演成像结果可有效圈定主要异常区范围，与实际回采验证资料较为吻合。研究表明，采用近风化带侧巷道单侧接收数据吸收系数反演成像结果能够有效反映主要异常区范围，解释结果与实际回采验证资料较吻合。研究结果对近风化带煤层工作面的安全高效生产提供了地质保障依据。更多还原

【Abstract】 Due to the potential influence of the weathering zone on near-outcrop inclined coal seams, the water-richness of coal and rock strata is increased, leading to a decrease in resistivity values and affecting the detection performance of radio wave perspective exploration. To improve the exploration accuracy of coal seam working faces in the near-weathering zone, numerical simulations and on-site detection applications were carried out in the coal seams of the study area, Xieqiao Mine, Huainan. Numerical simulation results show that the coal seam on the near-outcrop side has a higher radio wave absorption coefficient, with a difference in received field strength values reaching 11～17 dB between the two side roadways. The inversion using absorption coefficients from bilateral data is difficult to reflect geological anomalies, while the inversion from unilateral data significantly optimizes the effect, with results in good agreement with the geological model. On-site detection results indicate that the received field strength value in the return air roadway is approximately 12 dB higher than that in the machine roadway. The inversion results of field strength data detected from both roadways show insignificant reflection of geological anomalies, whereas the inversion imaging results of absorption coefficients from unilateral received data in the return air roadway can effectively delineate the scope of major abnormal areas, which are in good agreement with actual mining verification data. The study demonstrates that the inversion imaging using single-side absorption coefficient data from the roadways near the weathering zone can effectively reflect the scope of major abnormal areas, with interpretation results highly matching actual mining verification data. The research findings provide a geological guarantee for the safe and efficient production of coal seam working faces in the near-weathering zone.更多还原