| 冒我冬,白锦琳,骆燕,张伟盟,程莎莎.浅析地空瞬变电磁在煤矿采空区的探测效果[J].矿产勘查,2025,16(S1):181-188 |
| 浅析地空瞬变电磁在煤矿采空区的探测效果 |
| Analysis of the detection effect of Semi-Airborne TEM in coal mine goaf |
| 投稿时间：2024-11-27 |
| DOI：10.20008/j.kckc.2025S1021 |
| 中文关键词: 地空瞬变电磁 煤矿采空区 电磁响应特征 偏移距 |
| 英文关键词: Semi-Airborne TEM coal mine goaf electromagnetic response offset |
| 基金项目:本文受山东省煤田地质局科研专项(鲁煤地科字(2022)48号)和中国核工业地质局基础地质项目(202242-5)联合资助。 |
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| 中文摘要: |
| 本文研究了山东省滕州市金达煤矿采空区的地空瞬变电磁探测效果。通过不同发射电流和偏移距的电磁响应分析，发现随着偏移距增大，电磁响应振幅减小，噪声增大，偏移距大于 500 m时信号被噪声压制。在发射电流为 15 A、35 A和 50 A的条件下，电阻率剖面显示地下存在不连续的中高阻层和低阻带。地空与地面瞬变电磁探测数据结合，揭示了地层结构特征。 2种方法各有优缺点，地空电磁法受地形和电磁干扰影响小，但解释精度有限；地面瞬变电磁法分辨率相对较高，但对地形起伏和高阻覆盖层适应性差。实际应用中需根据具体条件选择合适的物探方法，并结合其他手段进行综合解释和验证。随着技术进步，未来有望提高探测精度和效率，为地下资源探测与工程安全提供更多可靠信息。该研究结果对煤矿安全生产和地下资源探测具有重要的指导意义。 |
| 英文摘要: |
| This article studies the effectiveness of Semi-Airborne TEM detection in the goaf of Jinda coal mine in Tengzhou City，Shandong Province. Through electromagnetic response analysis with different emission currentsand offset distances，it was found that as the offset distance increases，the amplitude of the electromagnetic response decreases and the noise increases. When the offset distance is greater than 500 m，the signal is sup. pressed by noise. Under the conditions of emitting currents of 15 A，35 A，and50 A，the resistivity profile showsthe presence of discontinuous medium to high resistance layers and low resistance bands underground，with resistiv. ity varying with depth. The combination of Semi-Airborne and ground transient electromagnetic detection datareveals the characteristics of geological structure. Both methods have their own advantages and disadvantages. The Semi-Airborne electromagnetic method is less affected by terrain and electromagnetic interference，but have limited interpretation accuracy；The ground transient electromagnetic method has relatively high resolution，but has poor adaptability to terrain undulations and high resistance cover layers. In practical applications，suitable geophysical methods need to be selected based on specific conditions，and combined with other means for comprehensive interpretation and verification. With technological progress，it is expected to improve detection accuracy and efficiency in the future，providing more reliable information for underground resource detection andengineering safety. These research results have important guiding significance for coal mine safety production andunderground resource exploration. |
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