多尺度电磁联合方法在贵州某磷矿深部岩溶探测中的应用  

Application of multiscale electromagnetic joint methods in deep karst detection in phosphorus pines in Guizhou Province

作　　者：张博尧 郭振威[1,2] 柳建新 刘春明[1,2] 杨牧 王妍艺[1,2] ZHANG Boyao;GUO Zhenwei;LIU Jianxin;LIU Chunming;YANG Mu;WANG Yanyi(School of Geosciences and Info-physics,Central South University,Changsha 410083,Hunan,China;Hunan Key Laboratory of Nonferrous Resource and Geological Disaster Exploration,Changsha 410083,Hunan,China)

机构地区：[1]中南大学地球科学与信息物理学院,湖南长沙410083 [2]湖南有色资源与地质灾害探查湖南省重点实验室,湖南长沙410083

出　　处：《矿产勘查》2024年第9期1653-1660,共8页Mineral Exploration

基　　金：国家自然科学基金项目“湘南钨锡多金属矿集区深部三维电性结构研究”(42130810)资助。

摘　　要：随着新能源行业的迅猛发展以及粮食需求的不断增多,深部磷矿资源开采迫在眉睫。贵州作为磷矿资源大省,品位高、矿层厚,具有很高的开采价值。但该地区呈现典型的喀斯特地貌特征,可溶岩总面积达12.88万km^(2),约占全省总面积的73%。开采过程中极易发生井喷、突泥等地质灾害,严重影响工程进度与开发成本,甚至造成人员伤亡。因此,探明地下岩溶发育情况对于磷矿开采工作十分重要。结合研究区地质条件以及磷矿埋藏深的特点,本文综合运用扩频激电法和可控源电磁法进行岩溶探测。两种方法优势互补,相互印证,通过对反演得到的电阻率剖面图进行定性分析,准确地圈定出岩溶发育区,为下一步磷矿开采工作提供参考,同时也为岩溶发育地区的物探工作提供有益的参考和借鉴。With the rapid development of the new energy industry and the continuous increase in grain demand,the exploitation of deep-seated phosphate resources is imminent.Guizhou,as a major province rich in phosphate resources with high grade and thick ore layers,has high mining value.However,the region exhibits typical karst landform features,with a total area of soluble rocks reaching 128,800 square kilometers,accounting for about 73%of the total area of the province.During the mining process,geological hazards such as blowouts and mud bursts are prone to occur,severely affecting project progress and development costs,and even causing casual⁃ties.Therefore,it is crucial to investigate the development of underground karst for phosphate mining.Combining the geological conditions of the study area with the characteristics of deep phosphate burial,this paper comprehensively applies spread spectrum induced polarization method and controlled source electromagnetic method for karst detection.The two methods complement each other's advantages and mutually confirm each other.Through qualitative analysis of the resistivity profiles obtained from inversion,the karst development areas are accurately delineated,providing reference for the next step of phosphate mining work and also offering beneficial references and guidance for geophysical work in karst development areas.

关 键 词：岩溶探测 扩频激电法 可控源电磁法 多尺度联合探测 

分 类 号：P631[天文地球—地质矿产勘探]