淮南矿区谢桥矿A组煤底板灰岩组分结构及水化学特征分析  

Coal Group A Floor Limestone Component Structure and Hydrochemical Characteristics in Xieqiao Coalmine, Huainan Mining Area

作　　者：储婷婷[1] 葛涛[1] 刘桂建[1] 吴盾[1] 

机构地区：[1]中国科学技术大学地球与空间科学学院,中国科学院壳幔物质与环境重点实验室,安徽合肥230026

出　　处：《中国煤炭地质》2014年第3期27-31,共5页Coal Geology of China

基　　金：国家自然科学基金(41173032);科学部支撑计划(1012BAC10B02);淮南矿业(集团)有限责任公司联合资助

摘　　要：A组煤(1煤)是矿井延伸开采的主要煤层,受底板承压岩溶水威胁。随着开采深度的增加,A组煤层底板灰岩突水几率也随之逐渐增大。采集谢桥矿A组煤层底板石炭系太原组石灰岩样品及对应层位的太灰水样品,并对不同层石灰岩样品进行显微镜下、X射线衍射(XRD)以及X射线荧光光谱(XRF)分析,对水样进行常规离子组分的测试分析,探讨了A组煤石灰岩矿物组成、化学组分及离子含量之间的关系。研究结果表明:太原组C2Ⅰ层和C2Ⅲ层石灰岩孔隙发育,溶蚀能力强,为含水层;C2Ⅱ层石灰岩裂隙不发育,岩溶不发育,为相对隔水层;太灰水中Ca2+、Mg2+、Na+、K+含量主要与石灰岩组成、pH值以及阳离子交换作用有关;Cl-含量与沉积水体盐度相一致。将岩石的矿物学特征与地下水化学组成同时进行研究对A组煤开采可行性分析具有重要现实意义。The coal group A （coal No.1） is the main coal seam during extension mining stage, the mining will be threatened by confined karst water. Along with the mining depth deepening, probability of coal group A floor limestone water bursting will gradually increase. The Xieqiao coalmine coal group A floor Carboniferous Taiyuan Formation limestone samples and corresponding horizon Taiyuan For-mation limestone water samples were collected. And carried out different layer limestone samples microscopic, X-ray diffraction （XRD） and X-ray fluorescence （XRF） analyses, water samples routine ion component testing analysis;discussed relations between coal group A limestone mineral composition, chemical constituent and ion content. The result has shown：limestone C2I and C2III in Taiyuan For-mation have developed pores and easy to be corroded, thus are aquifers;fissures and karst not developed in limestone C 2II thus a rela-tive aquifuge;Ca2＋, Mg2＋, Na＋and K＋contents in limestone water are related to limestone composition, pH value and cation exchange;Cl-content is consistent with salinity of water during the limestone was deposited. To study the rock mineralogical characteristics and groundwater chemical constituents simultaneously has important practical significance in coal group A mining feasibility analysis.

关 键 词：煤层开采 底板灰岩水 样品分析 形貌特征 XRD分析 X-荧光衍射 常规组分 谢桥煤矿 

分 类 号：TD741[矿业工程—矿井通风与安全] P641.4[天文地球—地质矿产勘探]