高密度电法在隐伏采空区识别分析中的应用

Application of high density resistivity method in identification and analysis of concealed goaf

确定采空区的位置和形态对于保障矿山安全生产十分重要,高密度电法因具有快速、准确、操作便利等优点而被广泛应用于采空区探测。以仙人桥铜矿隐伏采空区为研究对象,采用高密度电法,通过对采集的数据进行处理获取反演视电阻率剖面,并对剖面进行异常推理解译,结果表明:勘查区内推测有采空区11处,其中+20~+60 m中段主要表现为相对低阻;标高+60 m处共发现7个异常区,主要异常区位于测线中部,低阻异常体较大,为一较大规模采空区;标高+20 m处共发现4个异常区,主要异常区位于A_(4)-A_(6)号测线;根据物探结果初步确定了采空区的形态和体积。

Identification of the position and pattern of a goaf often play an important role in safety of mine operation,thus a high density resistivity method has been widely used for goaf survey because of its rapid,accurate and con-venient operation.In this paper,taking the concealed goaf in Xianrenqiao Copper Mine as the object of study,the high density resistivity method was successfully employed.The collected data were processed to obtain the inversion appa-rent resistivity sections and the anomaly inference and interpretation was carried out on the sections.It is estimated that there were 11 goafs(mined-out areas)in the exploration region among which the level+20 to+60 m exhibited relatively low resistance.A total of 7 abnormal areas were found at the level of+60 m.The major abnormal area was located at the middle of the survey line and presented low resistance anomaly,it was identified as an extensive goaf.There were 4 abnormal areas at level+20 m,among which the major one lies between line A_(4) and line A_(6).According to the results of geophysical exploration,the morphology and volume of the goaf were preliminarily determined.