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Use of Basalt Fiber-Reinforced Tailings for Improving the Stability of Tailings Dam
Binbin Zheng1,2, Dongming Zhang3,4, Weisha Liu5
1School of Management Science and Engineering, Shandong Technology and Business University, Yantai 264005, China. zhengbin_vip@sina.com.
Abstract:
As one of the largest artificial geotechnical structures on earth, the tailings dams are classified as one of the high-risk sources in China's industry. How to improve the stability and safety of tailings dams remains a challenge for mine operators currently. In this paper, an innovative method is presented for improving the stability of tailings dams, in which the basalt fiber is used to reinforce tailings. The mechanical properties of tailings used for dam-construction have a great influence on the stability of tailings dam. In order to investigate the mechanical performance of basalt fiber-reinforced tailings (BFRT), a series of laboratory triaxial tests were conducted. The effects of five parameters (fiber length, fiber content, particle size, dry density and confining pressure) on the mechanical properties of BFRT were studied. The microstructure and the behavior of interfaces between basalt fibers and tailings particles were analyzed by using scanning electron microscopy (SEM). The triaxial experimental test results show that the mechanical properties of BFRT increase with the increases of fiber length and content, particle size, dry density and confining pressure. The SEM results indicate that the interfacial interaction between fibers and tailings particles is mainly affected by particle shape.
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