A Summary of Research on the Durability of Cemented Paste Backfill in Mines

From the point of view of sustainable development, the durability of mine cemented paste backfill(CPB) structure has become more and more important. This paper mainly introduces the research status of the durability of CPB from the aspects of impermeability, heat resistance and chemical corrosion resistance. The main factors affecting the durability of CPB are summarized from the aspects of aggregate, cement and mixing water. And the measures for increasing the durability of the CPB were comprehensively reviewed. The results showed that the sulfate attack was the more serious problem and the temperature effect was second. The mineral composition and particle size distribution of the aggregate were the main factors affecting the performance of the CPB. Different cement varieties would provide different early strength, and the mixing water has a significant effect on the conveying performance of the CPB; adding active aggregate can replace the cement and increase the later strength of the CPB; selecting high-quality cement can significantly increase the early strength of the CPB and improve Anti-erosion performance; adding water reducing agent can reduce mixing water, improve the fluidity of the CPB and the conveying capacity in the pipeline, and improve the impermeability of the CPB. Provide theoretical basis for mine filling and mining engineering practice.