矿区深部含水层水-岩作用的同位素与水化学示踪分析  

Water-Rock Interaction Tracing and Analysis of Deep Quifers in the Mining Area Using Isotope and Hydrochemistry Methods

作　　者：陈陆望[1] 殷晓曦[1] 桂和荣[2] 王茜[1] 

机构地区：[1]合肥工业大学资源与环境工程学院,合肥230009 [2]宿州学院地球科学与工程学院,宿州234000

出　　处：《地质学报》2013年第7期1021-1030,共10页Acta Geologica Sinica

基　　金：国家自然科学基金项目(编号41173106);安徽省自然科学基金项目(编号1308085ME61)资助成果

摘　　要：为了有效揭示华北隐伏型煤矿区煤炭开采进程中深部含水层水-岩作用机制,本文以淮北煤田宿县-临涣矿区为研究示范,收集与采集1985～2011年期间矿区松散层第四含水层、煤系砂岩裂隙含水层、石炭系太原组岩溶含水层与奥陶系岩溶含水层深部地下水样166个,分析与测试87Sr/86Sr、34S、13C同位素以及Na++K+、Ca2+、Mg2+、HCO-3、Cl-、SO2-4、CO2-3等常规组分,并开展基于同位素与水化学的水-岩作用示踪与分析。研究成果表明:在矿区主要充水含水层中,煤系砂岩裂隙含水层脱硫酸与阳离子交替吸附作用最为显著,而松散层第四含水层、石炭系太原组岩溶含水层与奥陶系岩溶含水层黄铁矿氧化或地下水硬化最为显著;受煤炭开采影响,煤系砂岩裂隙含水层、奥陶系岩溶含水层主要水-岩作用逐渐减弱,松散层第四含水层、石炭系太原组岩溶含水层主要水-岩作用或增强、或减弱,增强或减弱的程度取决于井田基岩面标高、主要断层的展布形态与隔水性能以及煤层开采扰动范围等。In order to illuminate the mechanism of water-rock interaction indeep aquifers in the concealed coal mining area in North China , this study took the Suxian-linhuan Mining Area in Huaibei coalfield for example , and 166 groundwater samples in 1985 to 2011 were collected or gathered ,which belonged to the fourth aquifer of unconsolidated formation , the coal sandstone fissure aquifer , the Carboniferous karst aquifer of Taiyuan formation and the ordovician karst aquifer. 87 Sr / 86 Sr ,34 S and 13 C of these groundwater sampleswere tested , as well as conventional components such as Na ＋ ＋K ＋ , Ca2＋ , Mg2＋ , HCO-3 , Cl- , SO2-4 , CO2-3 .Moreover , tracing and analysis of the water-rock interaction indeep aquifers were carried out based on isotopes and hydrochemistry.The results suggest that , among the maindischarge aquifers in the mining area , the coal sandstone fissure aquifer is predominantly characterized bydesulfurizing or cation exchange absorption ,whereas , the fourth aquifer of unconsolidated formation , the Carboniferous karst aquifer of Taiyuan formation and the ordovician karst aquifer are predominantly characterized by pyrite oxidation or hardening.The results also suggest that , under mining-induced disturbance , the primary water-rock interaction tends toweaken for the coal sandstone fissure aquifer and the ordovician karst aquifer , yet , the primarywater-rock interaction tends toweaken or strengthen for the fourth aquifer of unconsolidated formation and the Carboniferous karst aquifer of Taiyuan formation ,which is controlled by the bedrock level , the fault location and itswater-resisting property , the extent of mining-induced disturbance in the mine.

关 键 词：含水层 水-岩作用 同位素 水化学 

分 类 号：P597[天文地球—地球化学]