新立矿区海底金属矿坑与上覆海水的连通性分析  

Analysis of connectivity between undersea metal mine and overlying seawater in Xinli mine area

作　　者：李国庆[1,2] 马凤山[2] 孟召平[3] 

机构地区：[1]中国地质大学(武汉)资源学院,湖北武汉430074 [2]中国科学院地质与地球物理研究所工程地质力学重点实验室,北京100029 [3]中国矿业大学(北京)地球科学与测绘工程学院,北京100083

出　　处：《中南大学学报（自然科学版）》2012年第10期3938-3945,共8页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(41172271;40972197);国家重点基础研究发展计划("973"计划)项目(2007CB209405)

摘　　要：以新立矿区主采矿体为研究目标,经过现场水文地质调查、矿坑涌水的常量离子测试与相关分析,剔除显著正相关性的指标,考察各测试指标的物理意义,并选用Cl,K+和Ca2+的质量浓度以及环境指数γ(SO42)/γ(Cl)和γ(Na+)/γ(Cl)作为变量,对水样进行分层聚类,分析矿坑涌水的水文地球化学特征以及与上覆海水的连通性。研究结果表明:目前矿坑东北部沿脉巷道围岩裂隙涌水与海水化学性质较接近,说明控矿断裂下盘东北部岩体裂隙与海水连通性相对较好;矿坑西南部沿脉巷道及穿脉巷道围岩裂隙涌水与卤(咸)水化学性质较接近,目前该部位涌水以消耗基岩裂隙卤(咸)水净储量为主。With Xinli mine area as a case study, in-situ surveying, sampling and constant ions test in water samples were conducted, correlation analysis on the variables indicators was performed based on the test data and some variables of significant positive correlations were removed, and the physical significances of some ions in water were discussed. With mass concentrations of CI-, K＋ and Ca2＋, r（SOa2-）/r（C1-） and r（Na＋）/r（C1-） as variables, the mine water samples were classified using hierarchical cluster analysis and the connectivity between an undersea metal mine and overlying seawater was speculated. The results show that the mine water from surrounding rock of the northeast roadway along the vein is closer to sea water in chemical properties, which indicates that the connectivity between the rock fissures in lower northeast block of the ore-controlling fault and seawater is relatively good; the mine water in the southwest roadway along the vein and crosscuts is closer to the brine （salty） water in bedrock fissures in chemical properties and drains the net reserves of brine （salty） water in bedrock fissures.

关 键 词：卤水 海水 矿坑涌水 连通性 脱硫作用 水岩作用 

分 类 号：P641.4[天文地球—地质矿产勘探]