王海军
WANG Haijun

• 1:中煤科工集团西安研究院有限公司
• 2:西北大学地质学系西北大学大陆动力学国家重点实验室

摘要(Abstract)：

为了对煤层顶板稳定性做出合理的评价,从沉积环境入手,通过顶板岩层精细划分对比、岩心精细描述、各类岩石样品的系统采集及测试分析,结合地球物理测井(包括水文测井)、抽水试验、矿井生产资料等,研究顶板沉积环境及其与工程地质、水文地质的关系。结果表明:研究区煤层顶板的沉积环境为曲流河沉积,主要发育泛滥平原沉积微相,零星的发育决口扇、点砂坝沉积微相。泛滥平原顶板岩石稳定性差,点砂坝、决口扇顶板稳定性中等。顶板直接含水层主要形成于延安组曲流河中的决口扇、点砂坝沉积微相形成的中–厚层状透镜状砂岩中;直罗组底部的砂岩含水层形成于多期河道砂岩纵向叠置形成的巨厚层状砂岩中。沉积环境不仅影响煤层顶板工程地质特征而且影响煤层顶板含水层的分布、富水性、导水裂隙带的高度等水文地质特征。
In order to make reasonable evaluation on the stability of coal seam roof, thus for mine design, equipment selection, the roof maintenance management to provide scientific basis and to ensure the safety of mine high-efficient exploitation, research from the coal seam roof depositional environment through the roof strata classification and correlation, core fine description, samples of rock mechanics analysis of the sampling and testing system combining with the geophysical well logging technology(including hydrological logging), pumping test technology, mine production data analysis technology, and so on. The coal seam roof depositional environment and the relationship between engineering geological and hydrogeological are studied. The main research area extracting seam roof belongs to the meandering river sedimentary environments, the main development sedimentary microfacies in the flood plain, the growth of sporadic crevasse splay sedimentary microfacies, point bar sedimentary microfacies, flood plain sedimentary formation of roof rock stability belongs to the poor. The point bar, crevasse splay sedimentary formation of roof rock stability belongs to the medium, the aquifer of roof mainly formed in the crevasse splay, point bar sedimentary environment, mainly for the lenticular, small range to thick bedded sandstone, J2 z aquifer formed in multiphase vertical superimposed channel sand body formed by the thick layer of sand body. Sedimentary environment not only affects the engineering geological characteristics but also impacts coal seam roof aquifer distribution, water content, the height of water flowing fracture belt and so on hydrogeological characteristics.

关键词(KeyWords)： 煤层顶板;沉积环境;工程地质特征;水文地质特征;顶板稳定性
seam roof;sedimentary environment;the characteristics of engineering geological;hydrogeological characteristics;roof stability

Abstract:

Keywords:

基金项目(Foundation): 中煤科工集团西安研究院有限公司科技创新基金项目(2013XAYQN002)~~

作者(Author): 王海军
WANG Haijun

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