为研究温纳三极（AMN & MNB）联合反演成像在岩层接触带划分中的有效性，构建整体、局部表层高阻体的软硬岩层地电模型，分析不同高密度电法装置对反演电阻率的响应特征，探讨温纳三极联合反演成像对覆盖层电阻率及厚度变化下岩层接触带的识别能力，并通过改变接触带倾角研究电阻率断面的响应特征。结果表明： 1）地表局部高阻体对反演断面的干扰要强于整体高阻体，但影响深度较浅； 2）不同装置的反演断面与预设模型基本吻合，但温纳三极联合反演探测深度较大，且对倾角的刻画更加精细； 3）降低覆盖层电阻率或增加覆盖层厚度，温纳三极联合反演对倾角的识别能力随之下降； 4）温纳三极联合反演能追踪岩层倾角的变化，但高阻上覆岩层易在接触带部位产生虚假低阻异常。结合泗安水库导流隧洞岩层划分的应用可知，温纳三极联合反演成像较常规电法装置获得的接触带产状及位置与实际揭露吻合度更高。
To investigate the effectiveness of Wenner AMN &
MNB joint inversion imaging in the division of rock contact zones, a geoelectric
model of soft and hard rock with integral and local surface highresistance
bodies is constructed, and the response characteristics of different highdensity electrical arrays to the inversion resistivity are analyzed.
Furthermore, the ability of Wenner AMN & MNB joint inversion imaging to
identify the contact zone of rock strata under varying overburden resistivity
and thickness is discussed, and the response characteristics of the resistivity
section are investigated by changing the dip angle of the contact zone. The
results reveal the following: (1) The interference of the local highresistance body on the inversion section is stronger than that of
the whole high-resistance body, but the influence depth is shallow. (2) The
inversion fracture surfaces of different arrays are consistent with the preset
models, but the Wenner AMN & MNB joint inversion has a larger detection
depth and a more detailed description of the dip angle. (3) With a decrease in
overburden resistivity or an increase in overburden thickness, the
identification ability of Wenner AMN & MNB joint inversion to dip angle
decreases. (4) The Wenner AMN & MNB joint inversion can track the change of
rock dip angle, but the highresistance overlying
strata are prone to false lowresistance anomalies in
the contact zone. Based on the application of rock stratum division of
diversion tunnel at Si′an reservoir, the occurrence and
position of contact zone obtained by Wenner AMN & MNB joint inversion
imaging are more consistent with the actual exposure than those obtained by
conventional electrical method device.
