With the advancement of fine coal exploration and the deepening of mine water hazard prevention and research, more and more advanced test instruments and detection methods are introduced into the study of engineering rock mass. In this paper, the samples of mudstone and sandy mudstone cores of Jurassic Anding, Zhiluo and Yan'an formations on the roof of Huanglong coal layer are selected, and the mineral composition and microstructure characteristics of the rock mass are mastered by means of X-ray diffraction and scanning electron microscope. The disintegration and expansibility tests of the rock mass are carried out to clarify the hydraulic properties of several types of rock mass. The intrinsic relationship among mineral composition , microstructure and the hydraulic properties of rock mass is analyzed objectively, which provides basic data and theoretical basis for the research and prevention of roof water hazards in the study area, and provides a reference for the comprehensive evaluation of water-resisting and waterproof properties of Jurassic coal measures strata.%提 要 随着煤田勘探精细化的推进以及矿井水害防治与研究工作的深入,越来越多的先进试验仪器与检测手段被引入到对工程岩体的研究中.本文选取黄陇煤田顶板的侏罗系中统安定组、直罗组、延安组的泥岩、砂质泥岩岩芯样品,运用X衍射、扫描电镜方法,掌握了这些岩层中的矿物组成与微观结构特征,并进行了各类岩石的崩解性、膨胀性试验,明确了几类岩体的水理性质,客观地分析了矿物组成与微观结构与岩体水理性质的内在联系,为研究区顶板水害研究与防治提供了基础数据与理论依据,为侏罗系煤系地层隔水、防水性能的综合评价提供参考.
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