【摘要】：研究全空間直流電測(cè)深曲線的變化規(guī)律,為全空間直流電法的創(chuàng)新應(yīng)用提供理論依據(jù),采用理論計(jì)算層狀全空間直流電測(cè)深曲線并統(tǒng)一歸納分類的方法,總結(jié)了全空間直流電測(cè)深曲線的類型和基本性質(zhì)。結(jié)果表明,全空間條件下n層地層對(duì)應(yīng)的曲線類型為2n-1種(n0),且遠(yuǎn)比半空間的復(fù)雜;層狀半空間曲線類型僅僅是全空間條件下記錄點(diǎn)以上的地層電阻率為無(wú)窮大的特殊情況;在超高阻層存在時(shí),半空間曲線尾支呈45°角上升的漸近線在全空間條件下其尾支漸近線變?yōu)?°角,由此發(fā)現(xiàn)全空間條件下直流電法探測(cè)低阻層比探測(cè)高阻層具有明顯優(yōu)越性。利用全空間直流電法這一性質(zhì),發(fā)展出許多煤礦井下全新的探測(cè)方法,為煤礦層狀地層條件下的全空間直流電測(cè)深法探測(cè)低阻含水導(dǎo)水等隱伏災(zāi)害性地質(zhì)構(gòu)造指明了應(yīng)用方向,豐富了全空間電測(cè)深理論。
[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 擄angle changes to 0 擄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.
【作者單位】： 中煤科工集團(tuán)西安研究院有限公司;煤炭科學(xué)研究總院;
【基金】：國(guó)家自然科學(xué)基金面上資助項(xiàng)目(41374150)
【分類號(hào)】：TD166

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