CAO Shuai, SONG Wei-dong, XUE Gai-li. Experimental study of long-term mechanical strength of cemented tailings backfill considering effect of filling interval time and solid content[J]. 2018, 39(S1): 341-347.
CAO Shuai, SONG Wei-dong, XUE Gai-li. Experimental study of long-term mechanical strength of cemented tailings backfill considering effect of filling interval time and solid content[J]. 2018, 39(S1): 341-347.DOI: 10.16285/j.rsm.2017.2311.
In order to investigate the influence mechanism of the long-term strength of cemented tailings backfill(CTB) with different filling interval times(FITs) and solid contents(SDs). The uniaxial compression strength(UCS) test was carried out by using two layered CTB specimens with three SDs of 70%
72% and 75%
four FITs of 12
24
36 h and 48 h. And the mechanical properties and its failure forms were investigated. The results show that: (1) The peak compressive strength of CTB decreases with the increases of filling interval. When the FIT is fixed
the UCS value increases along with the SD
and the peak compressive strength and filling interval are polynomial. (2) During the loading process
four stages of the compaction
line elastic
crack propagation and failure development are shown. With the extension of interval time
the failure forms of CTB may represent as the tension failure-shear failure transition-shear mixing damage. The conclusion can provide a useful reference for the strength design and stability control of CTB.