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工程科学与技术:2016,48(Z1):87-93
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真实水环境下高水材料三轴蠕变特性研究
(四川大学水利水电学院)
Study on Triaxial Creep Characteristics of High-water-material Under Real Water Environment
(School of Hydraulic and Hydroelectric Eng., Sichuan Univ.)
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投稿时间:2015-08-31    修订日期:2015-12-28
中文摘要: 高水充填材料用于充填开采时,高水材料自身的物理力学性质,尤其是其长期力学和变形特性,对顶底板岩层的活动规律会产生直接影响,同时也决定采空区地表沉降控制的效果。为研究采空区中的高水充填材料的活动规律,利用自行设计、加工、制造的轴压水压联合作用岩石流变试验系统,进行了真实压力水环境下高水材料的蠕变试验。研究结果表明:水环境有利于高水材料强度的保持和发展,水压力可以提高材料的承载能力和长期强度;同时,水压力可以抑制高水材料的蠕变发展,且水压力越大,材料稳定蠕变的极限蠕变量越小;水压力对高水材料蠕变试验的初始应变率有显著影响,并影响进入到稳定蠕变阶段所需的时间长度。
Abstract:When high-water-material is applied in deep goaf to control ground settlement, the physical and mechanical properties of the material, especially its long-term mechanical and deformation characteristics, can not only directly affect the activity rhythm of roof and floor, but also control the effect of ground settlement of goaf. To simulating the real filling situation of goaf, triaxial creep test of high-water-material under real water environment was conducted and the creep characteristics was analyzed. Research results showed that: Water environment is conducive to keep and development of strength of high-water-material, and water pressure environment can improve the bearing capacity and long-term strength of the material; Water pressure environment can inhibit creep variable development of the material, and the limit creep variable on Stable creep stage of the material is decrease with the increase of the water pressure. Water pressure environment has significantly effect on initial strain rate and time length of stable creep stage.
文章编号:201500873     中图分类号:    文献标志码:
基金项目:国家自然基金煤炭联合基金重点项目(51134018); 水压轴压共同作用下深部矿井岩石峰后力学效应研究(51369001)
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蒋源,刘长武.真实水环境下高水材料三轴蠕变特性研究[J].工程科学与技术,2016,48(Z1):87-93.
jiangyuan,liuChangwu.Study on Triaxial Creep Characteristics of High-water-material Under Real Water Environment[J].Advanced Engineering Sciences,2016,48(Z1):87-93.