摘要
为认识新疆某煤矿两大环境地质特征,根据该矿地质概况,分析瓦斯和煤自燃特征,并探讨控制这两大环境地质因素的地质条件。结果表明,研究区煤层厚度大,层数多,瓦斯含量高;构造运动使煤层发生两次生气过程,产生大量瓦斯,伴生的逆断层阻隔了瓦斯的逸散,使得瓦斯含量较高;地层倾角大,出露好,裂隙系统提供了氧气通道,促进了煤的自燃;煤中顺层向下流动的水阻隔了瓦斯的顺层向上运移,有效封存瓦斯;水在煤自燃的初始阶段起到促进作用,同时煤层出露较好,煤体热量易聚集,加之氧气供给相对丰富,自燃较易发生。
This paper is motivated by a need for a deeper understanding of the two main environmental geological characteristics unique to one minefield in Xinjiang Province. The research builds on the geological conditions of this mine, analyzes features of gas and spontaneous combustion of coal seam, and investigates the geological conditions underlying the two environmental geological factors. The results show that coal seams are of higher thickness and more layers and thus a higher gas content; tectonic movement has resulted in the two occurrences of coal generation processes, producing a large amount of gas, which are prevented by associated reverse faults from escaping, contributing to a higher gas content; higher dip angle, better developed outcrops and oxygen channels occurring in fissures are contributors to spontaneous combustion; water running downward through coal seams keeps gas from upward migration, with a consequent effective gas sequestration; and the combined factors,such as water beneficial to the initial stage of coal spontaneous combustion, a better coal exposure, an easier accumulation of coal heat, and a relatively abundant supply of oxygen contribute to leaving coals prone to spontaneous combustion.
出处
《黑龙江科技大学学报》
CAS
2015年第6期593-596,共4页
Journal of Heilongjiang University of Science And Technology
关键词
煤层自燃
瓦斯
新疆煤矿
煤层发育
构造运动
水文地质条件
coal spontaneous combustion
gas
Xinjiang coal mine
coal seam development
tectonic movement
hydrogeological condition
