小屯井田地质构造特征分析

Analysis on Geological Tectonic Features of Xiaotun Minefield

基于断裂构造发育对煤层稳定、开采技术条件及安全生产影响的重要性,采用统计分析方法对大量钻孔及矿井揭露资料分析研究的基础上,探讨了小屯井田构造形成机制,该井田自古生代以来先后经历了3期构造应力场,形成正断层控制的断裂断块组合,断裂构造以NE及NNE向最为发育,在剖面上构成地堑、地垒构造形态,煤系被保存于地堑、地垒或阶梯状断裂组成的断块构造中。井田煤层小断层发育,其展布具有一定的规律性,某些小断层表现出层滑的性质。

Based on the importance of the fracture tectonic development affected to the seam stability, mining technical conditions and safety production, the static analysis method was applied to analyze and study the information of the large number boreholes and mine and the paper discussed the tectonic formation mechanism of Xiaotun Minefield. There were three periodical tectonic stress fields occurred since Paleozoic Era in the research area. There were fracture broken block components controlled by the centripetal faults. The fractured tectonic was well developed based on the NE and NNE direction. In the cross section, there were moat and horst tectonics. The coal measures were deposited in the moat, horst or ladder type fractured broken block tectonic. In the minefield, the small faults in the seam were well developed, the distribution of the faults was in certain pattern and some of the small faults had the strata sliding features.