Experimental Study of the Damage and Failure Characteristics of the Backfill-Surrounding Rock Contact Zone.
Experimental Study of the Damage and Failure Characteristics of the Backfill-Surrounding Rock Contact Zone.
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充填体-围岩接触带损伤破坏特征试验研究
DOI：
10.3390/ma15196810
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发表时间：
2022-09-30
期刊：
影响因子：
--
通讯作者：
Wu Y
中科院分区：
文献类型：
--
作者：
Li G;Wan Y;Guo J;Ma F;Zhao H;Wu Y
由于充填体与围岩性质存在明显差异，变形总是在接触带附近发展。因此，确定充填体与围岩接触带的损伤破坏特征是矿山安全生产的前提。以金川矿区为研究区，根据几何形状的不同，充填体与围岩接触带分为线性模型、嵌入模型和多重折线模型三种模型。本研究采用数值模拟与物理模型试验相结合的方法。研究结果表明，线性模型中的破坏始于接缝，破坏主要集中在填充体，且以剪切破坏为主。嵌入模型中的损伤首先发生在拐点附近，而多重折线模型中的损伤首先发生在接缝处，并且裂纹总是首先出现在垂直接触面上。三种接触模型中，稳定性增加顺序为：嵌入>多重折线>线性。而且，被围岩包围的充填体是最稳定的，位于下盘的围岩比位于下盘的充填体更稳定。研究结论为金川矿及其他地质条件和开采方式相似的矿山设计开采方案提供了理论依据，并为研究复合材料的力学性能和稳定性提供了参考。
Due to obvious differences in the properties of the filling body and surrounding rock, deformation always develops near the contact zone. Thus, determining the damage and failure characteristics of the contact zone between the backfill and surrounding rock is a precondition for safe production in mines. Taking Jinchuan mine as study area, the backfill-surrounding rock contact zones are divided into three models according to their different geometric shapes, namely, a linear model, embedded model, and multiple broken line model. A combined numerical simulation and physical model test method was adopted in this study. The research results show that the damage in the linear model begins at the seam, the failure is mainly concentrated in the filling body, and shear failure is dominant. The damage in the embedded model initially occurs around the inflection points, while the damage in the multiple broken line model initially occurs at the seams, and cracks always appear on the vertical contact surface first. Among the three contact models, the stability increases as follows: embedded > multiple broken line > linear. Moreover, the filling body enclosed by surrounding rock is the most stable, and the surrounding rock located in the footwall is more stable than the filling body located in the footwall. The conclusions of this study provide a theoretical basis for designing a mining scheme for Jinchuan mine and other mines with similar geological conditions and mining methods, and they provide a reference for studying the mechanical properties and stability of composite materials.
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发表时间：
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影响因子：
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