八宝井田地质构造特征及成因分析

Babao Minefield Geological Structure Characteristics and Genetic Analysis

通过对八宝井田勘探资料及野外地质资料进行分析,探讨了八宝井田地质构造特征及其成因,认为八宝井田位于老房子—砟子向斜东段,由一轴向NE倒转向斜构造、一组与向斜轴向大致平行的逆掩断层和NNW向的断裂(F1、F15)构成井田的主要构造格局。印支运动、燕山运动的多期活动使前晚侏罗世地层受到强烈改造,形成NE—近EW向的褶皱和断裂。井田内断层发育,给煤炭生产带来一定困难,但在NE向逆掩断层倾向与煤层倾向一致的地方,有可能找到储量可观的煤炭资源。

In order to find out the Babao minefield geological structure characteristics and their genesis, through the use of exploration and field geological information analyses, considered that the Babao minefield is located at the east part of Laofangzi-Zhazi syncline, main structural setup is a NE reversed syncline, a set of thrust faults approximately parallel with the syncline and two NNW faults （F1 and F15）. Multiple staged activities of the Indo-China Movement and Yanshan Movement strongly reformed the pre-Late Jurassic strata and formed NE and near EW folds and faults. Large amount faults in the minefield have impacted coal production, however, in case of NE thrust faults have same dip with coal seams, and then favorable number of coal resources may be found there.