• 论文
主办单位:煤炭科学研究总院有限公司、中国煤炭学会学术期刊工作委员会
工作面内地质异常无线电磁波透视规律研究
  • Title

    Wireless electromagnetic wave perspective law of geological anomaly in working face

  • 作者

    占文锋李文武玉梁刘芳彬郑佳荣牛学超

  • Author

    ZHAN Wenfeng;LI Wen;WU Yuliang;LIU Fangbin;ZHENG Jiarong;NIU Xuechao

  • 单位

    北京工业职业技术学院建筑与测绘工程学院煤炭科学技术研究院有限公司安全分院山西省矿井地球物理勘探技术创新中心成都大学煤炭工业规划设计研究院有限公司

  • Organization
    School of Architectural and Surveying and Mapping Engineer, Beijing Polytechnic College
    Mine Safety Branch, China Coal Research Institute
    Shanxi Province Technical Innovation Center forMine Geophysical Exploration
    University of Chengdu
    CCTEG Coal Industry Planning Institute
  • 摘要
    为了掌握煤(岩)层及地质异常体对电磁波透视的影响规律,采用三维数值模拟方法,研究全空间条件下环形天线发射电磁波在煤(岩)层中传播时,遇到不同地质异常体(断层、陷落柱)时的传播特征。结果表明:异常体充填空气较多时,电磁波损耗小,磁场强度等值线外凸;若异常体充填水较多时,电磁波能量损耗较大,曲线内凹;充填其他介质时,电磁波损耗介于两者之间,可通过实测场强曲线、等值线变化,判断异常区电性特征。异常体形态和规模不同,磁场强度分布也不相同;异常区为圆形或似圆形时,磁场强度在异常体内产生畸变,远离异常体后逐渐恢复正常分布,识别较为困难;故异常体直径越小,离接收点越远,识别越困难;当异常区为条状断层分布时,断层走向与巷道交角越小,受影响的测点较多,识别较容易;若断层走向与巷道交角变大,受影响的测点变少,则识别较困难,据此可大致判断断层走向。正常情况下,场强曲线呈左右对称的抛物线形态,中间大、两侧递减;异常体所处位置、形态及充填物质不同,曲线形态亦不相同;当异常体规模较大时,曲线呈对称或不对称的“M”形。因此,在数据处理初期,由于场强曲线获取较快,可以通过识别曲线形态初步定性判别异常体的某些特性,但无法准确定位射线上不同区段的异常特征,可进一步结合层析成像分析,得到正确合理的认识。
  • Abstract
    In order to study the impact of coal (rock) layers and geological anomalies on the perspective of electromagnetic waves, a 3D numerical simulation method was used to simulate the propagation characteristics of electromagnetic waves emitted by a circular antenna in coal (rock) layers encountering different types of geological anomalies ( faults, collapse columns) under full-space conditions. The following conclusions were obtained: when the geological anomaly is predominantly filled with air, the electromagnetic wave loss is low, and the contour lines of magnetic field intensity protrude outside; while filled with water, the electromagnetic wave energy loss is greater and the curves are concave; when filled with other media, the loss is between the two extremes, and the electrical characteristics of the anomaly area can be determined by observing the changes in field strength curves and contour lines.Different shapes and sizes of geological anomalies lead to various magnetic field 891第56卷第3期 COAL ENGINEERING Vol. 56, No. 3intensity. When the anomaly area is circular or approximately circular, the magnetic field intensity is distorted within the anomalous body and gradually returns to a normal distribution away from the anomaly, making identification more difficult; the smaller the diameter of the anomalous body, the more challenging the identification becomes. When the anomaly area consists of a linear fault, the angle between the fault direction and the tunnel affects the number of affected measurement points, making identification easier when the angle is small; as the angle increases, fewer measurement points are affected, making identification more difficult, and the fault direction can be roughly determined with this observation.Under normal circumstances, the field strength curve is a symmetrical parabola with the intensity maximizes at the middle and gradually decreases along both sides. However, the shape of the curve varies depending on the position, morphology, and filling material of the anomalous body. When the anomalous body is large, the curve is a symmetrical or asymmetrical “M” shape. Therefore, in the initial stage of data processing, the qualitative characteristics of anomalous bodies can be preliminarily determined according to the curve shape. However, precise localization of anomalous features along the ray requires further analysis using tomographic imaging to achieve a correct and reasonable understanding.
  • 关键词

    无线电波透视法数值模拟陷落柱断层

  • KeyWords

    radio penetration method;numerical simulation;collapse column;fault

  • 基金项目(Foundation)
    国家自然科学基金项目(52104196);北京工业职业技术学院科技支撑计划项目(BGY2023KY-10);北京工业职业技术学院重点科研课题(BGY2022KY-15Z)
  • DOI
  • 引用格式
    占文锋, 李 文, 武玉梁, 等. 工作面内地质异常无线电磁波透视规律研究 [J]. 煤炭工程, 2024, 56(3):189-196.
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