Downhole Ip Measurements Ulth A Piezocone At Mine Tailings Impoundment

The last decade’s environmental concerns have resulted in additions to the Cone<br>Penetration Test piezocone making it capable of measuring geophysical parameters and therefore<br>effective at identifying anomalies. This paper describes one of the most recently developed<br>additions, which measures the induced polarization (IP) effects.<br>The testing site used to assess the capability of the IP-piezocone consisted of very<br>conductive mine tailings impoundments. The piezocone was used to study the detailed<br>stratigraphy, measure hydrogeological and geotechnical parameters and therefore provided<br>ground truthing.<br>The IP measuring system is described in detail. A typical IP trace is presented and<br>discussed in combination with the resistivity piezocone profiles and parameters.<br>Factors affecting results and application of IP measured with the piezocone are discussed.