Abstract Locating concealed geological structures in coal seams on both sides of a coal mine excavation roadway is of vital importance for safe production. Conventional electrical resistivity imaging methods mostly arrange observation systems on the roadway roof and floor, so they are inevitably deficient when it comes to detecting concealed geological structures in coal seams. According to the electric field distribution characteristics of artificial field sources for electrical resistivity imaging methods and utilizing the shielding of current by roadway cavities, this paper proposes the parallel coal seam detection method that arranges observation systems in coal seams on the roadway side to detect concealed geological structures in coal seams. On the basis of introducing the principles of consequent detection methods, this paper investigates the influence of roadway cavities on observation results and offers a method of correcting the influence of roadway cavities. In view of the geoelectric characteristics of typical concealed geological structures in working faces, this paper establishes numerical models to verify the feasibility of the parallel coal seam detection method. As indicated by the calculation results, the consequent pole–dipole (A-MN) observation system is the most ideal in terms of dividing the geoelectric interfaces of concealed geological structures in working faces, and its detection effect is influenced significantly by the coal seam thickness and the electric differences between surrounding rock and anomalous bodies. Coal seam resistivity slightly influences detection of the consequent pole–dipole system. According to practical application effects, the parallel coal seam detection method can solve the problem of detecting concealed geological structures in “single-roadway” working faces.

中文翻译：

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电阻率成像在单巷道隐蔽地质构造检测中的应用

摘要 煤矿开挖巷道两侧煤层隐蔽地质构造的定位对安全生产具有重要意义。传统的电阻率成像方法多在巷道顶底板上布置观测系统，在探测煤层隐蔽地质构造时难免存在不足。针对电阻率成像方法人工场源的电场分布特点，利用巷道空腔对电流的屏蔽，提出了在巷道侧煤层中布置观测系统的平行煤层探测方法，对隐蔽地质进行探测。煤层结构。在介绍后续检测方法原理的基础上，本文研究了巷道空洞对观测结果的影响，并提出了一种巷道空洞影响的修正方法。针对工作面典型隐伏地质构造的地电特征，建立数值模型验证平行煤层检测方法的可行性。计算结果表明，在划分工作面隐伏地质构造地电界面时，随向极-偶极子（A-MN）观测系统是最理想的，其探测效果受煤层厚度影响显着。以及周围岩石和异常体之间的电差异。煤层电阻率对后续极-偶极系统的检测有轻微影响。