电阻率单极-偶极测深法勘查溶洞的研究

RESISTIVITY MONOPOLE-DIPOLE DEVICE SOUNDING IN ROCK HOLE INVESTIGATION

碳酸盐在我国分布极为广泛,地下水主要赋存于碳酸盐溶隙中。本文介绍了电阻率测深在水文地质调查中的作用和意义,根据常规对称四极测深方法工作效率低的客观事实,提出了应用单极-偶极装置测深方法进行水文地质勘查,由推导出的点源半无限介质导体球电阻率公式,说明了三极测深方法具有理论依据,详细介绍了电阻率法单极-偶极装置特征,可以解决诸如含水层情况,埋藏深度,贮存地下水的断层破碎带等水文地质问题。根据多孔灰岩和含水层电阻率特征,在工区开展电阻率测深法具有物性前提,结合实例说明该装置测深勘查溶洞具有较好的地质效果。

The carbonate is distributed extensively over our country, of which groundwater mainly accumulates in cranny. In this paper, the effect and significance to resistivity sounding in the hydrogeology investigation are presented. In view of the inefficient conventional symmetry quadrupole device in resistivity sounding, monopole-dipole device in sounding groundwater in the hydrogeology investigation is proposed. The educing resistivity expressions to the conductive sphere in the half-infinity medium show that the dissymmetry triple -pole device in sounding has theoretical gist. The characteristic of resistivity monopole-dipole device is particularly introduced, which can deal with several hydrogeology issues such as aquifer, embedding depth, the fault fragmentized zone to store groundwater. According to the resistivity feature of lacunaria limestone and aquifer, the study of resistivity dissymmetry sounding in working area has physical precondition. It is proved with the example that monopole-dipole device sounding in rock hole investigation has a better geological effect.