许疃矿井田地质构造特征及其演化规律

基于矿井地质勘探与生产揭露资料，分析许疃矿井地质构造发育特征及其构造演化过程。结果表明：矿井主体褶皱为一走向近南北、向东倾斜的单斜构造，并发育两组轴向为NWW向和近EW向褶曲；断层构造较发育，且逆断层所占比例较大，断层走向主要以NE和NNE向为主，断层平均倾角为50°，高角度断层居多。矿井构造受多期构造运动的叠加，断层相互切割，构造更趋复杂化，对矿井生产有一定影响。

Geological structure characteristics and evolution rule of Xutuan mine

This paper is an analysis of the geological structure characteristics and the tectonic evolu- tion process of Xutuan mine, based on mine geological and production date available. The results show that the main fold of the mine body is composed mainly of a monoclinic structure which has near SN trend and tilt east, and is a fold which develops two groups of axial as NWW and near EW of fault ; and that the faults are of better developed structures and consist of disproportionately large number of reverse faults, dominated by NE and NNE trend and the faults with the average angle of 50 are dominated by high-angle faults. Given the superposition of multiphase tectonic movement and fault cutting each others, the mine structure becomes a more complex structure with a negative impact on production.