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超千米深井巷道围岩变形破坏时空演化规律试验研究
Similar simulation experimental study on space-time evolution law of deformation and destroy of deep rock roadway
投稿时间: 2017-05-03  最后修改时间: 2017-07-28
DOI:
中文关键词:  超千米深井巷道  大变形  相似模拟  时空效应
英文关键词:eep roadway  deformation of rock roadway  similar simulation  effect of time and space
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
张辉 河南理工大学 caikuangzhang@163.com 
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中文摘要:
      针对超千米深井巷道围岩大变形破坏的难题,通过相似模拟试验,分析了超千米深井巷道周围的应力应变演化规律和倾角对巷道稳定性的影响,揭示了超千米深井巷道变形破坏时空演化规律。试验结果表明:由于岩层倾角的存在,巷道底板两脚部出现应力集中现象,随外界载荷的增大,巷道拱部左上角与底板右下角首先发生破坏,而后向围岩深部扩展,且巷道围岩出现大范围变形破坏,而巷道左帮和右帮应力集中现象加剧;巷道围岩各位置处产生的位移量差别较大,巷道拱部与底板产生位移量较大,两帮位移量相对较小,巷道变形量最大的位置达到30mm以上;超千米深井巷道围岩变形破坏特征分为3个阶段:缓慢变形阶段、剧烈变形阶段和严重变形破坏阶段,巷道围岩产生大变形非对称性破坏,且破坏范围较大,顶底板最大破坏深度达到34mm,巷道围岩失去承载能力,巷道空间完全封闭。实验结果应用于工程实践,提出华丰煤矿超千米深井巷道全断面高强预应力锚网支护,特殊部位加强支护的方案,达到了理想的效果。
英文摘要:
      According to the similar simulation test, the influence of stress and strain evolution law and inclination angle on the stability of roadway around ultra-kilometer deep well roadway is analyzed, and the deformation and damage of super-kilometer deep roadway are revealed. Temporal and spatial evolution. The test results show that the stress concentration of the two parts of the roadway floor is damaged by the inclination of the rock formation. With the increase of the external load, the upper left corner of the roadway arch and the lower right corner of the bottom are destroyed first, The deformation of the rock is large, and the displacement of the left and right of the roadway is increased. The displacement of the roadway surrounding rock is different, and the displacement of the roadway arch and the bottom plate is larger, And the maximum deformation of the roadway is more than 30mm. The deformation and failure characteristics of the surrounding rock in the ultra-kilometer deep roadway are divided into three stages: the slow deformation stage, the severe deformation stage and the serious deformation and failure stage, and the large deformation asymmetry Damage, and the destruction of a larger range, the top and bottom plate maximum damage depth of 34mm, roadway rock loss of carrying capacity, roadway space is completely closed. The experimental results are applied to the engineering practice. It is proposed that the full-thickness high-strength prestressed anchor net support of the super-kilometer deep roadway in Huafeng Coal Mine is the ideal effect.
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