煤矿安全2019，Vol.50Issue(7)：31-36,41,7.DOI:10.13347/j.cnki.mkaq.2019.07.008
榆横北区煤层顶板含水层岩石微观特征研究
Study on Rock Microscopic Characteristics of Roof Aquifers in Northern Yuheng Mine Area
摘要
Abstract
By studying the micro characteristics of rock, the spatial structure, permeability and distribution of aquifer can be mastered. To fully understand the watery quality of direct water-filled aquifers of coal seam roof, taking Balasu Well Field as an example, by means of theoretical analysis, thin section observation and mercury injection tests, the microscopic characteristics of rocks in the direct water-filled aquifer of No. 2 coal seam roof in the future main mining of the mine are analyzed and studied. The results showed that, the lithology of the aquifers in Yan’an formation mainly consists 2 lithologic types which are fine lithoclastic feldspar sandstone and medium lithoclastic feldspar sandstone; there are 3 main lithologic types of the aquifer in Zhiluo formation, one kind of coarse lithoclastic feldspar sandstone more than Yan’an formation. The larger the grain size and the smaller the density in the sandstone aquifers, the conditions of porosity and permeability of the aquifer in Zhiluo formation are better than those in the fourth section of Yan’an formation. The occurrence of these two aquifers is not uniform and may affect the safety of mine production.关键词
侏罗纪煤田/矿井水害/煤层顶板含水层/岩石学特征/微观空间性质Key words
Jurassic coal field/mine water hazards/roof aquifer of coal seam/petrologic feature/microscopic space quality分类
矿业与冶金引用本文复制引用
王春刚,方刚..榆横北区煤层顶板含水层岩石微观特征研究[J].煤矿安全,2019,50(7):31-36,41,7.基金项目
国家重点研发计划资助项目(2017YFC0804102, 2017YFC0804103) （2017YFC0804102, 2017YFC0804103）
国家自然科学基金资助项目(41807221) （41807221）
陕西省自然科学基础研究计划资助项目(2018JQ5150) （2018JQ5150）
