河流相沉积导向在大南湖某煤矿水文地质条件评价中的作用研究  

Study on Function of Fluvial Facies Sedimentary Orientation in a Dananhu Coalmine Hydrogeological Condition Assessment

作　　者：李攀峰 Li Panfeng(China Coal Geology Group Co.Ltd.,Beijing 100040)

机构地区：[1]中煤地质集团有限公司

出　　处：《中国煤炭地质》2019年第12期94-98,共5页Coal Geology of China

摘　　要：新疆大南湖某矿区地处内陆干旱地区,区内的葡萄沟组为主要含水层。在以往3次地质勘探对矿区的水文地质条件形成不同结论,导致3个开拓中的井筒严重突水或被淹的情况下,采用了沉积环境分析法确定了矿区葡萄沟组为冲积扇沉积,层序分析、沉积相认识和测井资料都显示有3个旋回的沉积建造,每个旋回都具备河流相典型的二元结构。根据沉积环境导向,认为矿区发育3条古河道,其中一条古主河道通过井筒区域,导致井筒区水文地质条件复杂,葡萄沟组富水性强;抽水试验和井筒突水证明了沉积环境导向分析的准确性。A coalmine area in the Dananhu,Xinjiang is situated in an inland arid area.The Putaogou Formation in the area is a principal aquifer.Previous three geological explorations have different conclusions on mine area hydrogeological condition.Thus,in 3 developing pit shafts under serious water bursting or flooding conditions,through sedimentary environmental analysis has determined mine area Putaogou Formation is alluvial fan deposits.The sequence analysis,sedimentary facies cognition and logging data are all shown a sedimentary formation with 3 cycles,every cycle possesses typical dualistic structure of fluvial facies.Based on sedimentary environment orientation has considered that the mine area had developed 3 paleochannels,one of them has across pit shaft area thus caused complex hydrogeological condition in the area and strong water yield property of Putaogou Formation.Pumping test and pit shaft water bursting have proved exactitude of sedimentary environment orientation analysis.

关 键 词：沉积环境 粒度分析 层序分析 抽水试验 

分 类 号：P641.4[天文地球—地质矿产勘探]