小王家矿区水文地质特征分析及矿坑涌水量预测  

Analysis of Hydrogeological Characteristics and Prediction of Mine Water Inflow in Xiaowangjia Mining Area

作　　者：翟笃军 ZHAI Dujun(322 Geological Team,Bureau of Geology and Mineral Exploration of Anhui Province)

机构地区：[1]安徽省地质矿产勘查局322地质队

出　　处：《现代矿业》2023年第12期37-39,44,共4页Modern Mining

摘　　要：小王家铁矿处于长江中下游成矿带宁芜铁、硫成矿区之雍镇铁矿田南西端延伸部位上。通过分析矿区水文地质特征、抽水试验及预测矿坑涌水量,认为小王家矿区含水层主要为上层由第四系松散状态黏土、砂、砂砾石层,中层由上新近系未固结成岩的粉砂岩、含黏土砂砾石岩,下层由三叠系徐家山组碳酸盐岩裂隙岩溶含水岩组构成;含水层及矿层底部由闪长斑岩构成,富水性相对较弱,由此构成的底板视为隔水底板。采用抽水试验测试渗透系数,采用大井法进行矿坑涌水量预测,为矿床开发建设提供设计依据。The Xiaowangjia iron deposit is located in the southwest extension of the Yongzhen iron ore field in the Ningwu iron and sulfur metallogenic belt in the middle and lower reaches of the Yangtze River.By analyzing the hydrogeological characteristics of the mining area,pumping test and prediction of mine water inflow,it is considered that the aquifer in Xiaowangjia mining area is mainly composed of the upper Quaternary loose state clay,sand and gravel layer,the middle layer is composed of the upper Neogene unconsolidated diagenetic siltstone and clay sandy gravel rock,and the lower layer is composed of the Triassic Xujiashan Formation carbonate rock fissure karst water bearing rock group.The aquifer and the bottom of the ore layer are composed of diorite porphyry,and the water abundance is relatively weak.The floor formed by this is regarded as the water-resisting floor.The pumping test is used to test the permeability coefficient,and the large well method is used to predict the water inflow of the mine,which provides the design basis for the development and construction of the deposit.

关 键 词：水文地质特征 裂隙岩溶含水层 抽水试验 涌水量预测 

分 类 号：P641.463[天文地球—地质矿产勘探] TD742[天文地球—地质学]