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| EXPERIMENTAL STUDY OF RELATIONSHIP BETWEEN ELECTRIC RESISTIVITY AND MECHANICAL PROPERTIES OF PHOSPHATE TAILINGS |
| XU Jiajun1，2，WEI Zuoan1，2，CHEN Yulong3，YANG Yonghao2 |
(1. State Key Laboratory of Coal Mine Disaster Dynamics and Control，Chongqing University，Chongqing 400030，China；
2. College of Resources and Environmental Sciences，Chongqing University，Chongqing 400030，China；3. Department of Civil Engineering，The University of Tokyo，Tokyo 113–8656，Japan) |
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Abstract The impacts of moisture content，dry density，temperature and other factors on the electric resistivity of phosphate tailings are studied using the method of two-phase electrode. Modified triaxial apparatus is used to conduct triaxial tests on the specimen of phosphate tailings to obtain the stress-strain curves and the changes of electric resistivity synchronously. Then stress-strain-electric resistivity curve and the relationships between the electric resistivity and the cohesion and internal friction angle are obtained. Results show that the electric resistivity of phosphate tailings decreases with the increase of water content，temperature and dry density. The initial electric resistivity correlated negatively with the shear strength，the cohesion and the internal friction angle. During the triaxial compression process，the electric resistivity of phosphate tailings increases initially and then decreases with the growing of strain.
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Received: 31 March 2014
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2014, Vol. 33 
