Experimental Research on Tailings Briquetting for Filling Mining Subsidence Area in Jinshandian Iron Mine

Abstract:

This paper analyzed the feasibility of tailings briquetting for filling mining subsidence area based on the actual conditions. In the experiment, the diameter 25mm filling balls were made of slurry of Jinshandian tailings and cement, the cement tailing ratio was 1:4, the concentration of slurry was respectively 68%, 70%, 72%, 75%, and the falling strength, the compressive strength, the powder ratio about the filling balls were tested. The results showed that the falling strength was more than 50 times/A; the compressive strength was 5.23~21.12MPa; the powder ratio was 0.69%~10.52%. The results of the PFC2D numerical simulation showed that the maximum stress among the filling balls was 3.39MPa during the ore drawing process. The stress was lower than the minimum compressive strength of 5.23MPa, and the corresponding powder ratio was less than 8%. It has been concluded that the filling-body is able to meet the requirement of the strength and the powder ratio in the mine filling. The filling-body can be applied to backfilling subsidence area.

• Periodical: Advanced Materials Research (Volumes 594-597)
• Pages: 310-315
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.594-597.310
• Online since: November 2012
• Authors: Cui Feng Du, Ying Zuo, Hao Feng Li, Shui Ping Wang
• Keywords: Compressive Strength, Falling Strength, Filling Ball, PFC^2D Simulation, Powder Ratio, Tailings Briquetting

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