Micro-Mechanism of Uniaxial Compression Damage of Layered Cemented Backfill in Underground Mine.
Micro-Mechanism of Uniaxial Compression Damage of Layered Cemented Backfill in Underground Mine.
复制标题
地下矿山层状胶结充填体单轴压缩破坏的微观机理
DOI：
10.3390/ma15144846
复制
发表时间：
2022-07-12
期刊：
影响因子：
--
通讯作者：
中科院分区：
文献类型：
--
作者：
充填体分层现象在大型充填区普遍存在。本文采用1：8的灰砂比，分别配置68%、70%、72%、74%四种浓度，充填层数分别为一层、二层、三层、四层的胶结充填试样。结合单轴压缩试验和二维颗粒流分析软件（PFC 2D），研究了其力学性能和破坏模式。结果表明，浓度能增强充填体的单轴抗压强度，而充填次数的增加会减弱其强度，据此建立了本构损伤模型。结果表明，分层充填体存在初始分层破坏，总破坏呈现先快后慢的上升趋势;单层和双层充填体的主要破坏模式表现出突出的剪切破坏特征，三层和四层充填体更接近于拉伸破坏。从裂纹的产生到试件的破坏，存在着不同能量之间的相互转换。
Layering of filling body is common in large-scale filling areas. In this paper, the cement–sand ratio of 1:8 is based on the configuration of 68%, 70%, 72% and 74%; four concentrations; and filling layers of one-, two-, three- and four-layered cemented filling samples. Combined with a uniaxial compression test and two-dimensional particle flow software (PFC2D), the mechanical properties and failure modes were explored. The results show that the concentration can strengthen the uniaxial compressive strength of the filling body while increasing the filling times weakens its power; therefore, the constitutive damage model was constructed. It was found that the initial layered damage existed in the layered filling, and the total damage showed an upward trend of first fast and then slow; the main failure modes of one-layer and two-layer backfills showed prominent shear failure characteristics, and the three-layer and four-layer fillings were closer to tensile failure. From the crack generation to the specimen failure, there is a mutual conversion between different energies.
登录
查看更多内容
单轴压缩层状胶结尾矿充填声发射特性及损伤演化过程
影响因子：
7.4
作者：
Wang, Jie;Fu, Jianxin;Wu, Shan
通讯作者：
Wu, Shan
影响因子：
7.4
作者：
Cao, Shuai;Song, Weidong;Yilmaz, Erol
通讯作者：
Yilmaz, Erol
影响因子：
2.5
作者：
Belibi Tana, Armelle Estelle;Yin, Shenghua;Wang, Leiming
通讯作者：
Wang, Leiming
加载速率对胶结尾矿充填体单轴抗压强度行为和声发射特性的影响
影响因子：
7.4
作者：
Cao, Shuai;Yilmaz, Erol;Xue, Gaili
通讯作者：
Xue, Gaili
耙式深锥浓密机尾矿床孔隙连通性及脱水机理
影响因子：
2.5
作者：
Chen, Xinming;Jin, Xiangfei;Liu, Juanhong
通讯作者：
Liu, Juanhong