An Integrated Approach to Detect Seepage Path Using Streaming Potential & Electrical Resistivity in Tailing Dam

This study proves the efficiency of the integrated geophysical approach in detecting the seepage path on the tailing dam. However, a direct approach to the problem would be more time consuming, expensive & weakening of structures. In order to identify the problematic zone without damage to the civil structure can be made possible through geophysical investigation.

The Electrical Resistivity Imaging (ERI) & Streaming Potential (SP) were opted for the present study to assess the relative change in the physical properties of the geomaterial. ERI helps in assessing the electrical properties of the material and the SP helps in detecting the flow paths & direction via change in its potential. Integrating both the results gives a reliable outcome in detecting the seepage paths.

Seepage from a mine tail dam possesses a great threat to the surrounding neighborhood due to its hazardous nature. Multiple ERI & SP lines (parallel) were performed to track the entry and exit point of water. An increase in moisture level within the impermeable clay layer showcases significant drop in resistivity & potential of ERI & SP results. The survey was carried out using bentonite clay over the berm sections for a firm contact with the body of the dam. A 3D volume of the dam body has been created to detect the seepage connectivity.