Analysis of tectonic characteristics and regional tectonic evolution of Southern Gaoshan exploration area in Yiluo coalfield

Southern Gaoshan exploration area of Yiluo coalfield belongs to Mianlin depression area in North China Platform, with relatively developed fault structures. In order to clarify the structural characteristics of the exploration area in Southern Gaoshan and the influence on coal seam, the authors discussed the structural characteristics and tectonic evolution regularity of the exploration area, based on the comprehensive analysis of 2D seismic data, drilling data and field geological data. It is considered that the tectonic deformation in the area mainly includes three stages: Indosinian, Yanshanian and Himalayan. The fault structures mainly include the nearly EW trending faults in Indosinian Period, NW-trending nappe faults in Late Yanshanian and NE-trending tensile faults in Himalayan, which have greatly damaged the coal seams in the exploration area. The phenomenon of “two-storey building” exists in the 2-1 coal in the east of the exploration area. This research could provide new ideas and prospecting target areas for the further findings of coal resources in Yiluo coal field.