神府矿区柠条塔井田直罗组地层富水性研究

发布时间：2018-04-04 08:33

本文选题：安全工程　切入点：地下水科学　出处：《安全与环境学报》2016年04期

【摘要】：柠条塔井田内的直罗组砂岩层属于孔隙裂隙含水层且富水性差异较大,若煤层采动区域位于直罗组砂岩富水性强的区域,顶板水害直接威胁矿井安全生产。采用沉积学方法分析了柠条塔井田直罗组砂岩的沉积特征、直罗组顶部风化砂岩特征、直罗组砂岩的富水规律,并对柠条塔井田内的直罗组砂岩富水性进行了分区。结果表明,直罗组地层在垂向上分为3段,为辫状河沉积相、辫状河三角洲沉积相、曲流河沉积相和滨浅湖沉积相;直罗组沉积相以砂坝和粉砂-泥质河漫、砂质河道骨架为主,表现为南北向分布。其中,能够为地下水提供较好储存空间的主要是砂质河道及砂坝发育的厚度较大的砂岩层,此地段的砂岩富水性相对较强。直罗组砂岩厚度越大,富水性越强。研究表明直罗组沉积相与地层的富水性之间存在一定的内在联系。根据砂体的展布规律将研究区划分为富水性不同的3个区(强、中等和弱)。
[Abstract]:The sandstone layer of Zhiluo formation in Caragana tower mine field belongs to pore fissure aquifer and has great difference in water enrichment. If the mining area of coal seam is located in the area of strong water-rich sandstone of Zhiluo formation, the roof water hazard directly threatens the safety of mine production.The sedimentary characteristics of Zhiluo formation sandstone in Caragana tower mine field, the characteristics of weathered sandstone at the top of Zhiluo formation, and the water-rich regularity of Zhiluo formation sandstone were analyzed by means of sedimentology method. The water-rich sandstone of Zhiluo formation in Caragana tower mine field was partitioned.The results show that the stratigraphy of Zhiluo formation is divided into 3 sections vertically, which are braided river sedimentary facies, braided river delta sedimentary facies, meandering river sedimentary facies and shore-shallow lake sedimentary facies, and the Zhiluo formation sedimentary facies are sand dam and silty sand muddy river overflowing.The framework of sandy river is dominant, and it is distributed in the north and south direction.Among them, sand channel and sand dam are the main sandstones which can provide better storage space for groundwater, and the sandstone in this area is relatively rich in water.The greater the thickness of the Zhiluo formation sandstone, the stronger the water-rich.The results show that there is a certain relationship between the sedimentary facies of Zhiluo formation and the water-rich strata.According to the distribution law of sand body, the study area is divided into three regions with different water rich (strong, medium and weak).
【作者单位】：西安科技大学地质与环境学院;陕西省土地工程建设集团;
【基金】：国家自然科学基金项目(51474098) 西安科技大学青年教师培育基金项目(201607)
【分类号】：TD745

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