<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1794-6190</journal-id>
<journal-title><![CDATA[Earth Sciences Research Journal]]></journal-title>
<abbrev-journal-title><![CDATA[Earth Sci. Res. J.]]></abbrev-journal-title>
<issn>1794-6190</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1794-61902023000200183</article-id>
<article-id pub-id-type="doi">10.15446/esrj.v27n2.86211</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Analysis of the influence characteristics and correction effect of the mine direct current method in advance detection of roadway cavities]]></article-title>
<article-title xml:lang="es"><![CDATA[Análisis de las características de influencia y efecto de corrección del método de corriente continua en la detección avanzada de la cavidad de la calzada en minería]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Xie]]></surname>
<given-names><![CDATA[Haijun]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[Jingrui]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[Zhiqiang]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[Sheng]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Xi'an University of Science and Technology College of Geology and Environment ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af2">
<institution><![CDATA[,Weinan Shaanxi Coal Qichen Technology Co., Ltd  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af3">
<institution><![CDATA[,China Coal Science and Industry Xi 'an Research Institute (Group) Co., Ltd  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2023</year>
</pub-date>
<volume>27</volume>
<numero>2</numero>
<fpage>183</fpage>
<lpage>190</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S1794-61902023000200183&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S1794-61902023000200183&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S1794-61902023000200183&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT To ensure safety during coal mining, the DC electric method is frequently used for the advanced detection of concealed water-rich abnormal geological bodies located ahead of a drivage roadway. However, to some extent, the accuracy of the detection is influenced by the roadway cavity, resulting in a deviation from the actual location of the anomaly. To investigate this phenomenon, the principle of advanced detection based on a spheroidal physical model was analyzed via "comparative analyses" and "simulated" methods using COSMOL Multiphysics software. Following the principle of numerical simulations, the influence of the roadway cavity on the accuracy of the advanced DC detection method was introduced, and the ratio of apparent resistivity calculated from actual data to that calculated only with the roadway cavity was carried out to obtain the roadway correction coefficient. This coefficient was employed to correct the apparent resistivity data for advanced 3-D detection. Additionally, the response characteristics of the anomalies at different electrode layout locations in the roadway were discussed. The results show that the ratio method effectively corrects the influence of the roadway during advance detection using the DC electric method and simultaneously improves the resolution of geological anomalies and the accuracy of positioning. Additionally, the influence of the roadway was related to the relative positions of the electrodes along the roadway. When the electrodes are set at the junction of the floor and the sidewall, the obtained resistivity curve is less affected. Therefore, the resolutions of the anomalies are higher, and their positioning is more accurate. Furthermore, a practical application of the ratio method indicated that the corrected curves reflected the geological anomalies better.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El método eléctrico de corriente continua (DC) se usa frecuentemente para la detección avanzada de cuerpos geológicos anormales ricos en agua y ocultos en la calzada de la mina y así asegurar la operación extractiva de carbón. Sin embargo, en cierto alcance, la exactitud de la detección puede estar alterada por la cavidad de la calzada, lo que significa una desviación en la ubicación de la anomalía. Para investigar este fenómeno se analizó el principio de detección avanzada, que está basado en el modelo físico esférico, a través de métodos de "análisis comparativos" y "simulados" a través del software Cosmol Multiphysics. De acuerdo con los principios de simulaciones numéricas, se introdujo la influencia de la cavidad de la calzada en la exactitud de la detección de corriente continua avanzada y se computó la proporción de resistividad aparente calculada con este método frente a aquella calculada solo con información de la cavidad de la calzada para así obtener el coeficiente de corrección. Este coeficiente se empleó para corregir la información de resistividad aparente en la detección 3-D avanzada. Adicionalmente, se discutieron las características de respuesta de las anomalías en varias posiciones con un diseño de electrodos en la calzada. Los resultados muestran que el método de proporción corrige efectivamente la influencia de la calzada durante el avance de la detección a través del método eléctrico de corriente continua y simultáneamente mejora la visualización de las anomalías geológicas y la exactitud del posicionamiento de estas anomalías. Además, la influencia de la calzada se ve reflejada en las posiciones relativas de los electrodos a lo largo de la calzada. Cuando los electrodos están en la zona donde confluyen el suelo y la pared, la curva de resistividad obtenida se ve menos menos afectada. Por lo tanto, la resolución de las anomalías es mayor y sus posiciones son más exactas. Además, una aplicación práctica del método de proporción indicó que las curvas corregidas reflejaron mejor las anomalías geológicas.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Mine DC electric method]]></kwd>
<kwd lng="en"><![CDATA[advanced detection]]></kwd>
<kwd lng="en"><![CDATA[numerical simulation]]></kwd>
<kwd lng="en"><![CDATA[ratio method]]></kwd>
<kwd lng="es"><![CDATA[método eléctrico de corriente continua]]></kwd>
<kwd lng="es"><![CDATA[detección avanzada]]></kwd>
<kwd lng="es"><![CDATA[simulación numérica]]></kwd>
<kwd lng="es"><![CDATA[método de proporción]]></kwd>
</kwd-group>
</article-meta>
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</name>
<name>
<surname><![CDATA[Yang]]></surname>
<given-names><![CDATA[X. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Wu]]></surname>
<given-names><![CDATA[X. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Cao]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Cui]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Research on Forward Modeling of "Triangular Cone" Type Direct Current Method]]></article-title>
<source><![CDATA[Journal of China Coal Society]]></source>
<year>2022</year>
<volume>47</volume>
<numero>08</numero>
<issue>08</issue>
<page-range>3015-23</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
