韩城矿区瓦斯赋存规律及致灾危险性分区

发布时间：2018-05-14 06:44

本文选题：地质构造 + 煤层含气性　；参考：《西安科技大学》2017年硕士论文

【摘要】：我国是煤炭大国,煤炭在一次性能源生产、消费结构中比例占到700%以上,煤炭在保障中国能源安全中,起着重要作用。中国煤炭赋存地质条件复杂,同时我国50%以上是高瓦斯、煤与瓦斯突出矿井,这使得矿井瓦斯赋存规律研究一直备受重视。论文以韩城矿区为研究对象,通过收集各个矿主要煤层的煤田地质、瓦斯地质和相关钻孔资料,依据煤田地质、瓦斯地质、数理统计等理论,对研究区瓦斯赋存规律、构造煤判识以及瓦斯致灾危险区进行研究,主要得到以下成果:1.通过统计分析矿区内瓦斯钻孔数据,厘清了研究区煤层含气性在层域和区域上的分布规律,系统研究了煤层赋存特征、煤级、煤质、水文地质、构造等因素对煤层含气性的影响作用。2.在系统研究含气性分布规律的基础上,通过结合各井田内地球物理测井曲线,初步判识了研究区煤体结构的分布特征;使用构造曲率方法,对研究区地层变形特征进行了刻画,最后结合钻孔岩芯分析对韩城矿区构造煤进行综合预测和判识。3.在对矿区煤层含气性特征和煤体结构进行研究之后,选取构造、含气量、围岩以及煤级四个一级指标,基于层次分析法构建了煤与瓦斯突出危险性评价模型,对韩城矿区各主采煤层进行灾害危险性分区,并分析其在垂向和平面上的分区特征。
[Abstract]:China is a big country of coal, coal in one-time energy production, consumption structure accounted for more than 700%, coal in ensuring China's energy security, plays an important role. The geological conditions of coal storage in China are complex, and more than 50% of the coal mines in China are high gas, coal and gas outburst mines. This paper takes Hancheng mining area as the research object, through collecting coal field geology, gas geology and related borehole data of each main coal seam, according to the theory of coal field geology, gas geology, mathematical statistics and so on, the paper studies the law of gas occurrence in the study area. Structural coal recognition and gas disaster risk areas are studied, the main results are as follows: 1. Through statistical analysis of gas drilling data in mining area, the distribution law of gas content of coal seam in the study area is clarified, and the characteristics of coal seam occurrence, coal rank, coal quality, hydrogeology are systematically studied. The influence of structure and other factors on the gas-bearing property of coal seam. On the basis of systematic study on the distribution law of gas-bearing property, the distribution characteristics of coal body structure in the study area are preliminarily identified by combining the geophysical logging curves in each well field, and the formation deformation characteristics in the study area are described by using the method of structural curvature. Finally, combined with drilling core analysis, comprehensive prediction and recognition of structural coal in Hancheng mining area are carried out. After studying the gas-bearing characteristics and coal body structure of coal seam in mining area, four primary indexes, namely structure, gas content, surrounding rock and coal rank, are selected, and the risk assessment model of coal and gas outburst is constructed based on AHP. The main coal seams in Hancheng mining area are divided into disaster risk zones and their vertical and plane zoning characteristics are analyzed.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD712.2

【参考文献】