层状全空间电测深曲线类型与新方法研究
发布时间：2019-03-27 14:18
【摘要】：研究全空间直流电测深曲线的变化规律,为全空间直流电法的创新应用提供理论依据,采用理论计算层状全空间直流电测深曲线并统一归纳分类的方法,总结了全空间直流电测深曲线的类型和基本性质。结果表明,全空间条件下n层地层对应的曲线类型为2n-1种(n0),且远比半空间的复杂;层状半空间曲线类型仅仅是全空间条件下记录点以上的地层电阻率为无穷大的特殊情况;在超高阻层存在时,半空间曲线尾支呈45°角上升的渐近线在全空间条件下其尾支渐近线变为0°角,由此发现全空间条件下直流电法探测低阻层比探测高阻层具有明显优越性。利用全空间直流电法这一性质,发展出许多煤矿井下全新的探测方法,为煤矿层状地层条件下的全空间直流电测深法探测低阻含水导水等隐伏灾害性地质构造指明了应用方向,丰富了全空间电测深理论。
[Abstract]:In order to provide theoretical basis for the innovative application of full-space DC sounding method, the variation law of DC sounding curve in all-space is studied, and the method of calculating layered DC sounding curve with theory and generalizing it in a unified way is presented. The types and basic properties of all-space DC sounding curves are summarized. The results show that the corresponding curve type of n-layer strata in the whole space is 2n-1 species (n0), which is much more complex than that of the half-space. The type of layered half-space curve is only a special case in which the formation resistivity above the recording point is infinitely large under the condition of full space. In the presence of super-high resistance layer, the asymptotic line whose tail branch of half-space curve rises at 45 掳angle changes to 0 掳angle under full-space condition. It is found that DC method is superior to high-resistance layer in detecting low-resistivity layer under full-space condition. Using the nature of all-space DC method, many new detection methods are developed in coal mines, which indicate the direction of application for detecting hidden geological structures, such as low resistivity water-bearing water conductivity and so on, by full-space DC electrical sounding method under the condition of layered strata in coal mines. It enriches the whole space electrical sounding theory.
【作者单位】： 中煤科工集团西安研究院有限公司;煤炭科学研究总院;
【基金】：国家自然科学基金面上资助项目(41374150)
【分类号】：TD166
[Abstract]:In order to provide theoretical basis for the innovative application of full-space DC sounding method, the variation law of DC sounding curve in all-space is studied, and the method of calculating layered DC sounding curve with theory and generalizing it in a unified way is presented. The types and basic properties of all-space DC sounding curves are summarized. The results show that the corresponding curve type of n-layer strata in the whole space is 2n-1 species (n0), which is much more complex than that of the half-space. The type of layered half-space curve is only a special case in which the formation resistivity above the recording point is infinitely large under the condition of full space. In the presence of super-high resistance layer, the asymptotic line whose tail branch of half-space curve rises at 45 掳angle changes to 0 掳angle under full-space condition. It is found that DC method is superior to high-resistance layer in detecting low-resistivity layer under full-space condition. Using the nature of all-space DC method, many new detection methods are developed in coal mines, which indicate the direction of application for detecting hidden geological structures, such as low resistivity water-bearing water conductivity and so on, by full-space DC electrical sounding method under the condition of layered strata in coal mines. It enriches the whole space electrical sounding theory.
【作者单位】： 中煤科工集团西安研究院有限公司;煤炭科学研究总院;
【基金】：国家自然科学基金面上资助项目(41374150)
【分类号】：TD166
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