Discussing the internal structural characteristics of coal seams using electrical microresistivity image logging data

摘要

This paper summarises the response characteristics of electrical microresistivity image logging on different coal seam structures through systemic pectination from Qinshui Basin in Central China. We use these characteristics to describe the internal structure characteristics of coal seams. The results show that image logging is a good way to provide reliable information for many aspects, such as the division of coal seams, deformed soft coal, the internal structure of coal seams, and so on. Coal seams with a layered structure are commonly shown to be relatively homogeneous orange-yellow (2,700-3,900 Omega.m) and to have clear lamination characteristics of dark and tan strips (800-1,500 Omega.m) inside. The layered-block structure is mainly shown in bright yellow (3,300-3,600 Omega.m) and has few dark stripes (800-1,200 Omega.m). The block structure is shown as bright yellow-white (3,300-4,800 Omega.m). The partings show up as clear and complete dark stripes (800-1,200 Omega.m) in images. The layers in which deformed soft coal develops normally have irregular fractures and present dark stripes of dark grey strata (1,000-1,500 Omega.m) in image logs