基于时移思想的高密度电法在库区岩溶精细化探测中的应用

Application of high-density electrical method based on time-shift idea in fine exploration of karst in reservoir areas

摘要

为提升高密度电法探测精度和效率，提出了一种创新的数据处理技术，通过单次数据采集时移处理实现，简化了传统方法的复杂性。结合理论模型的数值模拟与实际应用案例，深入探讨了该方法在岩溶探测中的有效性。结果表明，该方法能够有效识别电阻率变化率剖面中的断层和低阻异常体。实际案例中，反演结果与钻孔数据高度吻合，且电阻率变化率与压水试验得到的渗透系数显著相关。此外，岩溶分布特征与电阻率变化率剖面的局部极小值区域密切相关。这一方法成功揭示了西流溪库区地下岩溶裂隙的分布特征，为后期防渗帷幕施工提供了重要的科学依据和指导，也为高密度电法在岩溶的精细化探测中提供了新的解决方案。

Abstract

To enhance the accuracy of high-density electrical method, an innovative data processing technique has been proposed, which is implemented through time-shift processing during a single data acquisition, simplifying the complexities of traditional method. Numerical simulation of theoretical models was combined with practical application cases to explore the effectiveness in karst detection.Results indicate that the method can effectively identify faults and low-resistivity anomalies within the resistivity variation profiles. In practical cases, inversion result show a high degree of correlation with borehole data, and the resistivity variation rate is significantly related to the permeability coefficients obtained from pumping tests. Additionally, the distribution characteristics of karst features are closely linked to the local minima in the resistivity variation profiles. This method successfully reveals the distribution of underground karst fractures in the Xiliu Creek reservoir area, providing essential scientific evidence and guidance for subsequent seepage curtain construction.It also provides a new solution for the refined exploration of karst in reservoir areas using high-density electric method.

关键词

高密度电法 / 时移反演 / 精细化 / 岩溶 / 库区

Key words

high-density electrical method / time-shift inversion / fine / karst / reservoir area

Author summay

张 虎(1987—), 男, 工程师, 硕士, 主要从事工程物探技术应用研究。E-mail: [e-mail]