Study on factors affecting strength of tailings backfill body with response surface method

doi:10.16265/j.cnki.issn1003-3033.2017.12.018

Abstract

Abstract: In order to study the comprehensive effects of various factors on the compressive strength of filling body at different curing ages and improve the quality of mine filling, physical and chemical properties of filling materials were analyzed, orthogonal experiments were carried out. A response surface model was built to analyze the interactions between the various factors. The results show that F-value and P-value obtained in the response surface model test are larger than 33.34 and less than 0.000 1 respectively, so the model is effective, that both the increase in mass fraction of solid in slurry and the increase in ratio of cement to sand can effectively improve the compressive strength of filling body, that there is a critical value of the accelerater dosage, that there is a collaborative relationship between slurry solid content and lime sand ratio, and that there is a faint antagonistic relationship between mass fraction of solid in slurry, cement-sand ratio and accelerater dosage.

Key words: cemented backfilling, compression strength, synergistic effect, antagonistic effect, response surface model, ratio optimization

CLC Number:

X936

YANG Jian, YIN Tubing, LIU Kewei, LIU Zhixiang, CHEN Chong. Study on factors affecting strength of tailings backfill body with response surface method[J]. China Safety Science Journal, 2017, 27(12): 103-109.

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