地质与勘探2025，Vol.61Issue(3)：464-474,11.DOI:10.12134/j.dzykt.2025.03.003
豫西新安煤田二1煤层厚度变化特征及控制因素研究
Thickness Variation Characteristics and Controlling Factors of the No.Ⅱ1 Coal Seam in the Xin'an Coalfield of Western Henan Province
摘要
Abstract
This work aims to address the severe impact of localized coal seam thickness variations on the safe and efficient production of mines in the Xin'an coalfield of western Henan Province,and attempts to provide a basis for mine disaster management and mining layout.The thickness variation and controlling factors of the No.Ⅱ1 coal seam in the Shanxi Formation were investigated based on principles of statistics,sedimentology,and structural geology.The results show that the overall variation pattern of coal seam occurrence in the Xin'an coalfield is not obvious,with significant variations in coal thickness both macroscopically and microscopically,resulting from the combined effects of ancient sedimentary environments and multi-phase tectonic movements.The following conclusions are drawn:(1)The average thickness of the No.Ⅱ1 coal seam in the area is 4.04 m,mainly concentrated in the range of 0～5 m.The coal seam is thicker in the west and thinner in the east,with the western coal seam being less stable than the eastern one.(2)The lithology of the roof and floor of the No.Ⅱ1 coal seam is divided into four different combination patterns,primarily consisting of mudstone roof with mudstone floor and sandstone roof with mudstone floor.Different roof and floor lithology combinations exert varying control effects on coal seam thickness variations.(3)The thickness variation of the No.Ⅱ1 coal seam is regionally influenced by epigenetic erosion,while localized severe thickness variations are mainly controlled by interlayer sliding structures,with a control range of 25～92 m.(4)Small to medium-sized fault structures are another cause of abrupt coal seam thickness changes in working faces,with a control range of less than 30 m.关键词
煤层厚度/沉积环境/构造运动/层间滑动/新安煤田/豫西Key words
coal seam thickness/sedimentary environment/tectonic movement/interlayer sliding/Xin'an coalfield/Western Henan Province分类
地质学引用本文复制引用
金明方,李度周,杜留群,马合飞,张万鹏..豫西新安煤田二1煤层厚度变化特征及控制因素研究[J].地质与勘探,2025,61(3):464-474,11.基金项目
国家自然科学基金资助项目(编号:42004088)资助. （编号:42004088）
