黔中某矿区灯影组断控白云岩富水性差异研究及防治水意义  

Study on the difference of water-bearing capacity of fault-controlled dolomites inDengying Formation of a mining area in central Guizhouand its significance of water control

作　　者：向刚[1] 王明章[2] 曾牡丹[1] 王嘉铭 樊善兴 XIANG Gang;WANG Mingzhang;ZENG Mudan;WANG Jiaming;FAN Shanxing(104 Geological Brigade of Guizhou Geological and Mineral Exploration and Development Bureau,Duyun,Guizhou 558000,China;Guizhou Geological and Mineral Exploration and Development Bureau,Guiyang,Guizhou 550000,China)

机构地区：[1]贵州省地质矿产勘查开发局一〇四地质大队,贵州都匀558000 [2]贵州省地质矿产勘查开发局,贵州贵阳550000

出　　处：《中国岩溶》2023年第3期402-412,共11页Carsologica Sinica

基　　金：贵州省2020年矿产资源大精查项目(XNNK-KC-【2022】-0002);贵州省地矿局地质科研一般科学研究项目(黔地矿科合[2019]8号、[2020]5号)。

摘　　要：黔中地区矿床水文地质条件复杂,磷矿的主要充水层灯影组富水性中等至强,矿坑突水严重影响区域磷矿资源的安全开采。因此,掌握该区域灯影组的富水性特征极为重要。文章依托贵州省2020年矿产资源大精查项目资料,采用研究与生产相结合、典型矿区解剖的方法开展该矿床灯影组富水性研究。结果表明:黔中地区大湾磷矿为顶板直接充水的岩溶矿床,充水层灯影组的岩性、结构以及断裂构造是控制矿床充水条件的主要因素,灯影组含水性和透水性具有明显的“平面分块”和“垂向分层”的分布规律。充分利用该特征对于矿井防水设计并指导矿山开采,对保障黔中磷矿安全生产、降低开采成本具有重要意义。The central region of Guizhou Province enjoys global fame of its areas with large-scale production rich in phosphorus.For a long time,the phosphate rock resources in this area have provided a reliable guarantee for the domestic economic development.At present,this region has also become an important raw material base of phosphate rocks and a production base of fine phosphate chemicals in China.After decades of mining,phosphorus mines in this area have gradually changed from open pits to underground ones and from shallow to deep,and thus the hydrogeological conditions of deposits become increasingly complex.Dengying Formation,the main aquifers of phosphate rocks,is composed of dolomite with the water-bearing medium of solution pores and cracks.It is a waterbearing formation comprised of pure carbonate rocks with medium to high water abundance.Consequently,the high cost of mine drainage has imposed a heavy burden on mining enterprises.In addition,mine water inrush has severely threatened the exploitation safety of phosphate rock resources in this region.Therefore,it is very important to research the characteristics of water abundance of the Dengying Formation.The phosphate mine of Dawan,a water-filling deposit with deeply covered karst,is located on the western flank of the Baiyan anticline.The high bearing capacity of groundwater and complicated hydrogeological conditions of Dengying Formation are representative and typical in the Baiyan anticline area.Due to the super large scale and high grade of phosphate ore resources,the phosphate mine of Dawan was listed as a key project of mineral resource exploration in Guizhou Province in 2020.During the exploration work,a large amount of geological data was obtained through surface surveys,geophysical and hydrological logging,drilling,and hydrogeological experiments.In this paper,a study on the water abundance of the Dengying Formation of the deposit has been conducted based on the data from the exploration of the phosphate mine as well as the anatomy of typical mining a

关 键 词：富水性 灯影组 岩溶矿床 大湾磷矿 黔中地区 

分 类 号：TD745[矿业工程—矿井通风与安全] P641.46[天文地球—地质矿产勘探]