多种地球物理法在磷石膏堆场渗漏探测中的应用研究  

Research on Application of Various Geophysical Methods in Leakage Detection of Phosphogypsum Yard

作　　者：潘乐荀 PAN Lexun(Anhui Huizhou Geological Safety Research Institute Co.,Ltd.)

机构地区：[1]安徽惠洲地质安全研究院股份有限公司

出　　处：《现代矿业》2024年第9期54-58,共5页Modern Mining

基　　金：国家自然科学基金面上项目(编号:52274243)。

摘　　要：为了精确查明磷石膏堆场防渗膜下方渗水原因,找出地下水源渗流通道和方向,采用并行高密度电阻率测深、自然电位、电阻率穿透3种物探方法进行探测对比。结果表明:研究区内的背景电阻率值为36~50Ω·m,将小于背景电阻率的相对封闭低阻区划分为渗漏通道影响范围,研究区外围的低阻渗漏区,并推断了研究区可能存在的渗流通道。通过自然电位的大小确定了研究区内的电位梯度,分析了地下电化学场的方向,并划分了3处低电位汇集区。研究区内电阻率值的分布范围为30~170Ω·m,根据电阻率异常平面分布图和研究区内北低南高、西低东高的地形特征,划分了5个异常区,且电阻率值均小于55Ω·m。自然电位与电阻率穿透的结果在平面位置上具有高度的重合性,也进一步验证了该方法的可行性。综合3种物探结果,并结合现场地形分布情况,确定了堆场下方渗水的原因和地下渗流场的通道及方向。In order to find out the reason of water seepage under the impervious membrane of phos-phogypsum yard and find out the seepage channel and direction of underground water source,three geo-physical exploration methods of parallel high density resistivity sounding,natural potential and resistivity penetration are compared to detect.The results show that the background resistivity in the study area is about 36~50Ω·m,and the relatively closed low-resistance region with lower than the background resistiv-ity is divided into the influence range of the leakage channel and the low-resistance leakage region outside the study area,and the possible seepage channel in the study area is inferred.The potential gradient in the study area was determined by the size of the spontaneous potential,the direction of the underground elec-trochemical field was analyzed,and three low potential convergence areas were divided.The distribution range of resistivity values in the study area is 30~170Ω·m.According to the plane distribution of resistivi-ty anomalies and the topographic characteristics of the study area,which are low in the north and high in the south and low in the west and high in the east,five abnormal regions are divided,and the resistivity values are all less than 55Ω·m.The results of spontaneous potential and resistivity penetration have a high coincidence in the plane position,which further verifies the feasibility of the method.Based on the results of three kinds of geophysical exploration and the distribution of site topography,the cause of water seepage and the channel and direction of underground seepage field are determined.

关 键 词：磷石膏堆场 并行电法 自然电位法 电阻率穿透法 渗漏通道 

分 类 号：TD876.1[矿业工程—非金属矿开采] TD32[矿业工程—矿山开采]