The Selection and Application of Filling Material Based on Long-Term Strength of Backfill Body

Abstract:

High stress makes backfill body present the rheological properties in deep mine. This paper first uses RRTS-ⅢA to carry on creep test of specimen in different proportion, according to ε-t curves under different load levels to determine the specimen’s long-term strength, based on the exponential relationship of rock block and rock body, the long-term compressive strength is derived, combining with concrete parameters of working face, mixture ratios of filling material which meet long-term stability are selected, while analyzing the support resistance of backfill body. The results show that this design can effectively avoid the rheological instability of backfill body.

• Periodical: Advanced Materials Research (Volumes 239-242)
• Pages: 3156-3160
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.239-242.3156
• Online since: May 2011
• Authors: Bao Jie Fu, Min Tu
• Keywords: Backfill Body, Long-Term Strength, Rheology, Support Resistance

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