Recent studies have shown that the damage characteristics of cemented tailings backfill (CTB) are influenced significantly by the variation of cement-tailings ratio, while the effects of other influencing factors remain unanswered. The CTB damage constitutive model, which takes the corrected coefficient of damage variable into consideration, and peak toughness are introduced to investigate the effects of fine tailings contents, curing ages, curing temperatures, and water-to-cement ratios () on the damage evolution laws, damage (), and specific energy () at peak stress point of CTB. The results show that appropriate content of fine tailings could improve the compressive strength of CTB and reduce its damage evolution speed and . The damage growth rate of CTB decreases with curing age in early curing period and increases with higher curing temperature and . of CTB takes on a descending trend with higher and fine tailings content but shows an increase with curing age. There exists no significant relationship between and curing temperature. of CTB increases with curing age and higher curing temperature with a quadratic function but is on a decline with increases of fine tailings content and with logarithmic and exponential function, respectively. The results obtained from our study have important application to the successful design of backfill structures in underground mines.

中文翻译：

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对胶结尾矿回填破坏机理的认识

最近的研究表明，水泥尾矿回填（CTB）的破坏特性受水泥尾矿比变化的影响显着，而其他影响因素的影响仍未得到解答。引入CTB损伤本构模型，考虑修正的损伤变量系数和峰值韧性，研究细尾矿含量、养护龄期、养护温度和水灰比的影响。)关于CTB 峰值应力点的损伤演化规律、损伤 ( )和比能 ( )。结果表明，适量的细尾矿可以提高CTB的抗压强度，降低其损伤演化速度和。CTB的损伤增长率在养护早期随着养护龄期的增加而降低，随着养护温度的升高和. CTB 呈下降趋势，较高和细尾矿含量，但随着养护龄期的增加而增加。和固化温度之间不存在显着关系。CTB 的含量随着固化时间和固化温度的升高而增加，呈二次函数，但随着细尾矿含量的增加和分别具有对数和指数函数。我们的研究结果对地下矿山回填结构的成功设计具有重要应用。