Study of Strength Distribution in Cemented Paste Backfill
Author Information
Author(s): Tan Yuye, Li Yiding, Yu Xin, Deng Yuchao, Song Zepu, Kou Yunpeng
Primary Institution: University of Science and Technology Beijing
Hypothesis
What are the spatial strength distribution patterns and microstructure characteristics of ultra-fine tailings cemented paste backfill?
Conclusion
The study found that the uniaxial compressive strength of the ultra-fine tailings cemented paste backfill averages at 2.22 MPa, with strength increasing under higher surrounding pressures.
Supporting Evidence
- The uniaxial compressive strength of the UCPB averages at 2.22 MPa.
- The strength increased from 1.35 MPa to 4.69 MPa as the surrounding pressure increased.
- The spatial distribution of strength is influenced by the vertical distance and particle size distribution.
Takeaway
This study looks at how strong a special type of backfill material is and how its strength changes in different places. It helps us understand how to make better backfill for mining.
Methodology
The study used a scaled simulation model to test the mechanical properties of the backfill at different locations and analyzed the microstructure using CT and SEM.
Limitations
The study primarily focused on the spatial strength distribution and did not construct a comprehensive strength prediction model.
Digital Object Identifier (DOI)
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