宽甸县下甸子铁选厂尾矿库地球物理测试

为了评估尾矿库的稳定性,必须查明尾矿库下隐伏的地质构造.通过联剖电法、高密度电法对宽甸县下甸子铁选厂尾矿库场地进行了地球物理测试.联剖电法测试结果表明测区库底存在一条北东25°走向的破碎带异常,倾向南东,角度较缓,为压扭性特征;高密度电法测试未发现破碎带异常.基于地球物理测试结果的差异,进行了钻探实验,钻探结果表明:测区内没有破碎带异常,联剖曲面的正交点为原地表不对称沟谷的反映.该研究成果可以直接应用于评估尾矿库的稳定性.

Geophysical survey at tailing dam site of Xiadianzi iron ore processing plant in Kuandian county

In order to assess the stability of a tailing dam,all hidden geological structures must be identified under a tailing dam.A geophysical survey using associated electrical profile method and high-density electrical method was conducted at the tailing dam site of Xiadianzi iron ore processing plant in Kuandian County.The survey with associated electrical profile method shows that there is a fracture zone abnormality with a strike of 25 degree North-East and a dip toward South-East.The fracture zone presents the characteristics of low dip and compress-sheared.However,the survey with high density electrical method did not find abnormalities of fracture zone.Due to the difference in these two geophysical surveys,a drilling program was conducted in the disputed area.The drilling shows that there is no fracture zone in the surveyed area,and the orthogonal point found in the survey using associated electrical profile method is the response of an asymmetric valley in the original surface.The study results can be directly applied to assess the stability of the tailing dam.