煤复电阻率各向异性及其频率响应特征研究

发布时间：2018-05-21 19:51

  本文选题：复电阻率 + 各向异性　； 参考：《煤炭科学技术》2017年04期

【摘要】：为了实现煤岩物质组成和结构的高效电法勘探,基于岩石频率域激电效应,采用复电阻率法测试对四种不同变质程度的原生结构煤在不同方向上的复电阻率模值频率响应特征进行了研究。研究结果表明:随着频率不断增加,不同变质程度煤复电阻率模值在走向、倾向、垂向上均依次呈递减趋势;低频阶段复电阻率模值呈现明显各向异性;高频阶段复电阻率模在水平向和垂向呈各向异性,走向和倾向呈各向同性,造成这样的原因与煤中可极化电介质极化的时间长短有关。
[Abstract]:In order to realize the high efficiency electrical prospecting of the composition and structure of coal and rock materials, based on the rock frequency domain induced electricity effect, The frequency response characteristics of four primary structural coals with different metamorphism in different directions were studied by using complex resistivity method. The results show that: with the increasing of frequency, the modulus value of complex resistivity of coal with different metamorphic degree shows a decreasing trend in order of strike, tendency and vertical direction, and the modulus value of complex resistivity shows obvious anisotropy at low frequency stage. At the high frequency stage, the complex resistivity modes are anisotropic in horizontal and vertical directions, isotropic in strike and tendency, which is related to the time of polarization of polarizable dielectric in coal.
【作者单位】： 中国矿业大学(北京)资源与安全工程学院;河南理工大学瓦斯地质与瓦斯治理重点实验室—省部共建国家重点实验室培育基地;中国矿业大学(北京)地球科学与测绘工程学院;中原经济区煤层(页岩)气河南省协同创新中心;
【基金】：国家科技重大专项资助项目(2011ZX05040-005) 河南省高校科技创新团队支持计划资助项目(14IRTSTHN002) 教育部博士学科点专项科研基金资助项目(20134116110006)
【分类号】：P618.11;P631.3
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本文编号：1920528