The purpose of this survey was to use the ZZ Universal resistivity meter to explore possible geological reasons as part of a railway tunnel (from 370 to 430m) experienced settlement after completion. A total of 63 electrodes were laid on the surface above the tunnel and one was placed into the tu...

The purpose of the dam safety inspection was to monitor the safety of a stone masonry overflow dam (12m high and 161m long) using the ZZ Universal resistivity meter.

For this survey, several crosshole sections were undertaken in order to deduce the developing direction and size of the underground mineralisation.

The purpose of this surface resistivity survey was to delineate the development direction of a gold ore deposit. The surface resistivity survey uses a 10m interval cable, which enables the ZZ Universal system to detect an explorable depth of up to 120m. The system found a low resistive band from ...

These two surveys were designed to maximise the value of two existing boreholes. There was already known mineralisation existing between 60-80m in Figure 1 and 100-115m in Figure 2. The inversion resistivity images showed not only the shape of ore bodies, but also other possible high mineralisati...

Crosshole surveys are used when two or more boreholes are present in order to provide the maximum imaging accuracy for the cross-section between respective boreholes.

Surface-point resistivity surveys are used to obtain detailed survey information around a known anomaly. At least one borehole is required near the point of interest.

The traditional Mise-a-la-masse method is very useful for finding the developing direction of the ore body. However, this method is very time and effort-consuming.