The Selection and Application of Filling Material Based on Long-Term Strength of Backfill Body
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.
Zhong Cao, Xueqiang Cao, Lixian Sun, Yinghe He
B. J. Fu and M. Tu, "The Selection and Application of Filling Material Based on Long-Term Strength of Backfill Body", Advanced Materials Research, Vols. 239-242, pp. 3156-3160, 2011