【摘要】 矿井瞬变电磁法探测电性界面分层的准确性关系到探测地质效果。探讨了瞬变电磁波场变换理论,提出了矿井瞬变电磁波场变换算法,对实际矿井瞬变电磁数据进行了波场变换,提出了波场变换数据处理及成像方法,实现瞬变电磁剖面到拟地震剖面的转换,达到对电性界面的准确划分。结合矿井顶板岩层富水性探测的工程实例对矿井瞬变电磁波场变换及其数据处理方法的实用性和有效性进行了验证,取得了较好的地质效果。研究表明:矿井瞬变电磁波场变换及数据处理方法能够提取瞬变电磁数据中所包含的电性界面信息,解决矿井瞬变电磁法探测在准确确定电性界面方面的不足,突出弱异常进而提高分辨率。更多还原

【Abstract】 The detection accuracy of electrical interface by mine transient electromagnetic method(MTEM) affects the geological surveying results.Authors first discussed the theory of transient electromagnetic field transforming,proposed the algorithm of mine transient electromagnetic field transforming and calculated wave filed with actual surveying data,and then created the method of wave-field data processing and imaging,realized the transformation from mine transient electromagnetic section into pseudo-seismic section and accurate detection of the electrical interface.At last,the practicability and effective of the wave-field transforming and data processing were proved by the actual exploration on the water-containing of coal roof.The conclusion show that the wave-field transforming and pseudo-seismic imaging and data processing can extract the electrical interface information of MTEM and supplement the deficiencies of the MTEM on detecting accurately the electrical interface,highlight the weak anomalies and improve the resolution and increase exploration accuracy.更多还原