高密度电法中的电极位置校正方法研究

Research on electrode position correction method in multi-electrode resistivity method

由于装备局限性,高密度电法野外施工要求剖面方向为直线,而在很多工区往往不具备这一施工条件,电极的布设难免偏离测线的设计方向。为校正由于电极偏移带来的不良影响,从直流电法方法理论出发,利用视电阻率的定义形式,从装置系数K入手得出了剖面位置校正的方法,利用解析法数值,模拟得到了均匀半空间下无电极偏移和有电极偏移两种情况下的视电阻率响应,证明了电极位置校正的必要性。最后以实测数据为例,验证了校正方法的有效性。

Due to equipment limitation,field construction of multi-electrode resistivity method requires a straight section direction,which is often not available in many work areas,so the layout of electrodes will inevitably deviate from the design direction of the survey line.To correct electrode deviation due to the ill effects,direct current(DC)method based on the theory,using the definition of apparent resistivity form,from the device coefficient K to reach the position profile correction method,by using numerical simulation method of electrodeless offset is obtained under homogeneous half space and with the electrode offset forward response of the two cases,proving the necessity of the electrode position correction.Finally,the validity of the correction method is verified by taking the measured data as an example.