The Enhancement of Mine Waste Stability Using Biocementation
Sheyda Parvizi, Ramin Doostmohammadi, Foruzan Ghasemian Roodsari
University of Zanjan, Zanjan, Iran
Keywords: consolidation of mine wastes, uniaxial compressive strengths, biocement, microbially induced calcium carbonate precipitation, Sporosarcinapasteurii bacteria
Abstract
There are large amounts of waste deposits around mines and mineral processing plants, and their instability is one of the major concerns in mining industries. One of the methods to amend the waste deposit stability is the strength enhancement. Biocement is a method for improvement of the ground using microorganisms to precipitate calcium carbonate between geomaterial particles. For this process, Sporosarcinapasteurii bacteria is used to activate the calcite precipitation to increase the strength of Angouran mine. In this research, the effect of biocementation on increasing the strength of waste is investigated. The results of laboratory tests show that wave velocity and uniaxial compressive strength were considerably increased with number of injections. Also, the compressive strength of samples under initial load is increased in comparison to unloading modes. Therefore, utilizing the proposed method promotes the mine waste stabilization.
|
