不同灰砂比回填组合围岩控制能量耗散特性分析及数值模拟

IF 1.3 4区 工程技术 Q3 ENGINEERING, GEOLOGICAL
Kang Zhao, Qizheng Huang, Jun Wu, Yajing Yan, Jian Yang, Fujin Ning, Xiangqing Tian, Lang Liu, Yongbo Ji
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引用次数: 0

摘要

为了降低矿山回填的经济成本,通常采用不同灰砂比的胶结材料进行充填。本研究从能量消耗的角度探讨了不同灰砂比下充填体与岩石组合的损伤演化机制,并引入强度耗散率、损伤值参数和弹性应变能率来实现试件损伤的定义,以及能量积累效应的表征。此外,利用FLAC 3D软件对组合层状回填进行了数值模拟。结果表明:(1)弹性应变能率能够反映试件应变能的积累能力;应变能率越大,积累能力越强;(2)充填体-回填体组合的损伤演化分为初始损伤修复阶段、损伤稳定发展阶段、损伤加速发展阶段和残余损伤阶段;(3)顶层灰砂比为1:4、中间层灰砂比为1:8、底层灰砂比为1:10为最优充填方案。该研究可为空心区的回填提供理论参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Analysis of energy dissipation characteristics and numerical simulation of surrounding rock control for backfill combinations with different ash-sand ratios
To reduce the economic cost of backfilling a mine, layers of cemented materials with different ash sand ratios are often used to backfill the void. In this study, we explored the damage evolution mechanism from the energy consumption point of view for backfill and rock combination with different ash sand ratios, and introduced the strength dissipation rate, damage value parameter and elastic strain energy rate to achieve the definition of damage in the specimens, as well as the characterization of the energy accumulation effect. In addition, the layered backfilling of the assemblage was simulated using FLAC 3D software. The results show that: (1) the elastic strain energy rate can reflect the accumulation ability of the strain energy of the specimen; the larger the strain energy rate, the stronger the accumulation ability; (2) the damage evolution of the backfill–backfill combination is divided into stages: initial damage repair stage, damage stable development stage, damage accelerated development stage and residual damage stage; and (3) the top layer with an ash/sand ratio of 1:4, the middle layer with an ash/sand ratio of 1:8 and the bottom layer with an ash/sand ratio of 1:10 is the optimal backfilling scheme. This study can provide a theoretical reference for the backfilling of a hollow area.
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来源期刊
CiteScore
3.40
自引率
14.30%
发文量
66
审稿时长
6 months
期刊介绍: Quarterly Journal of Engineering Geology and Hydrogeology is owned by the Geological Society of London and published by the Geological Society Publishing House. Quarterly Journal of Engineering Geology & Hydrogeology (QJEGH) is an established peer reviewed international journal featuring papers on geology as applied to civil engineering mining practice and water resources. Papers are invited from, and about, all areas of the world on engineering geology and hydrogeology topics. This includes but is not limited to: applied geophysics, engineering geomorphology, environmental geology, hydrogeology, groundwater quality, ground source heat, contaminated land, waste management, land use planning, geotechnics, rock mechanics, geomaterials and geological hazards. The journal publishes the prestigious Glossop and Ineson lectures, research papers, case studies, review articles, technical notes, photographic features, thematic sets, discussion papers, editorial opinion and book reviews.
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