煤层导水裂缝带电各向异性特征研究（英文）

发布时间：2018-04-14 04:19

本文选题：煤层导水裂缝带 + 电各向异性　；参考：《Applied Geophysics》2017年02期

【摘要】：水害是煤矿五大自然灾害之一,严重威胁着煤矿工人的生命安全,其主要原因是煤层导水裂缝带诱发透水事故。由于导水裂隙带电各向异性严重,利用传统的电阻率方法探测的电阻率信息将会导致错误的水文地质结论。本文以煤层导水裂缝带为地质基础,建立地电模型,研究煤层导水裂隙带电各向异性特征。分别讨论了裂隙带地层水电导率、基质孔隙度、基质电阻率、裂缝密度,裂缝表面粗糙度,围岩地层压力大小以及裂缝倾角的对导水裂隙带电各向异性的影响。通过数值模拟,定性分析了各因素对电各向异性的影响以及地表视电阻分布形态与导水裂隙带特征之间的关系,初步探讨了利用导水裂隙带的电各向异性研究裂缝走向以及倾向方法。
[Abstract]:Water disaster is one of the five natural disasters in coal mine, which seriously threatens the safety of coal miners.Due to the serious anisotropy of the conductivity fracture, the resistivity information detected by the traditional resistivity method will lead to the wrong hydrogeological conclusion.In this paper, a geoelectric model is established on the basis of the fracture zone of coal seams, and the anisotropy characteristics of the fractures in coal seams are studied.The influences of formation water conductivity, matrix porosity, matrix resistivity, fracture density, fracture surface roughness, surrounding rock pressure and fracture dip angle on the conductivity anisotropy of water conducting fractures are discussed respectively.Through numerical simulation, the influence of various factors on electrical anisotropy and the relationship between surface apparent resistance distribution and the characteristics of water conductivity fracture zone are qualitatively analyzed.The method of studying fracture strike and tendency by using the electric anisotropy of water conduction fracture zone is discussed preliminarily.
【作者单位】：中国矿业大学资源与地球科学学院应用地球物理研究所;
【基金】：supported by a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions the Fundamental Research Funds for the Central Universities 2014QNA88 the National Natural Science Foundation(No.41674133)
【分类号】：TD745

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