集贤煤矿瓦斯地质规律主控因素分析

Analysis on main controlling factors to gas geology system of Jixian coal mine

为获得集贤煤矿的矿井瓦斯地质规律,对2007—2009年集贤煤矿的地质资料和瓦斯涌出量数据进行收集整理。在此基础上运用区域构造演化和瓦斯地质理论,分析集贤矿区地质构造演化及分布特征对瓦斯的控制影响。结果表明,集贤煤矿煤层的裂隙发育、高渗透性的顶底板砂岩岩性对瓦斯赋存的控制影响较小,不考虑为集贤煤矿瓦斯地质规律主控因素;而矿井构造、煤层埋深、岩浆岩侵入等因素对瓦斯赋存的控制影响较大,基本上为集贤煤矿瓦斯地质规律的主控因素。

This paper is aimed to provide our analysis on the main controlling factors of the gas geological system of Jixian coalmine. Tn get a thnrough-going comprehension of the gas geological features of the coahnine,we have accessed the geological data and the gas emission data of the mine from 2007 to 2009 in the said area and analyzed the causes that are likely to lead to such features. Based on the study of the collected data, we have also investigated the correlation between the data and the actual geological conditions in the mine from its regional tectonic evolution and gas geological theories. The longlasting and intensive analysis results of tectonic evolution and their distribution features of Jixian coal mine have enabled us to find that the gas-movement and evolution features are elosely linked with such geo-factors. The results of our analysis show that all the factors, like mine construction, coal seam depth, magmatic intrusion, can be taken as the main controlling factors for the mine and influence the mine construction, coal seam depth, magmatic intrusion and other factors influence greater the control of gas accidents. Therefore, the roof and floor lithology would have little effect on the coal production with no regard of the geological regularity of the mine gas because such geological features often result in the geo-fractures and chance of waterpermeability. Thus, such careful studies of the geo-features should be taken as a guide for the decision makers to take timely assistant and resistant measures so as to avoid serious accidents.