淮北地区地质构造与瓦斯灾害关系研究

Study on relationship between geological structure and gas disaster in Huaibei area

淮北地区经历了多期构造运动,形成了地区独特的徐宿叠瓦状逆冲断层系统。为了了解淮北矿区地质构造与瓦斯灾害关系,避免煤与瓦斯突出事故的发生,以淮北矿区地质构造为例,通过区域构造演化特征研究瓦斯赋存。在对研究区资料收集并详细对比中发现:淮北地区的高突矿井大都分布在徐宿叠瓦状逆冲断层系统的外缘,这些地区应力增高,构造煤发育,并且逆冲推覆体对煤系地层形成良好的覆盖,构成了煤与瓦斯突出的良好条件;研究区发育的北东向与近东西向的开阔褶皱与断层控制着燕山期岩浆岩的侵入,岩浆岩在矿井中有规律的分布,使邻近煤层变质程度增高、孔隙度变大,导致矿区煤与瓦斯突出严重。

Huaibei region has experienced multistage tectonization and formed Xuzhou-Suzhou imbricate thrust fault system.In order to draw relations of huaibei mining area geological structure and gas disasters,in Huaibei mining area geological structure,through the regional tectonic evolution characteristics of the gas occurrence,which is a unique regional structure.After detailed collecting and comparing the study region data,we found that high-gas outburst mines in this region are distributed in the outer margin of Xuzhou-Suzhou imbricate thrust fault system.This regional strain is concentrated,the coal was disturbed seriously and the coal seams was well covered by Xuzhou-Suzhou imbricate thrust system,which are benefit to coal and gas outburst.The invasion of magmatic rocks in Yanshanian were controlled by the developed NNE and nearly EW Open folds and faults.The magmatic rocks′ regular distribution increased the metamorphosis and porosity of near coal seams.