软岩注浆体流变特性及应用研究
发布时间：2019-07-02 10:55
【摘要】：巷道围岩稳定性一直是煤炭工程技术重点关注的问题,尤其随着煤矿开采深度的不断增加,高温、高地应力、高渗透压的影响,深井软岩巷道随时间效应表现出来的流变现象更加明显,因此研究深部软岩流变,是确保围岩长期稳定的前提。 本文以安徽省宿州市祁南煤矿为工程背景,根据34下采区的岩芯和注浆体基本力学试验结果,分析软岩和注浆体的应力应变曲线特征、强度与变形特征以及破坏形式,得到注浆体的强度参数,发现相同粒径大小的注浆体,水灰比小的注浆体内聚力和内摩擦角都大,为蠕变试验提供参考；本文进一步研究了软岩注浆体的流变力学特性,选择西原模型对注浆体流变特性进行模拟,并给出了流变参数,发现试验曲线和拟合曲线相近度非常高,说明选择的西原模型是科学的。 结合实验室对钻孔取芯煤岩体与注浆体试件测试参数,依据34下采区主体巷道围岩变形治理原则,提出了34下采区主体巷道围岩变形治理方案,包括巷道全断面刷扩段围岩变形控制方案、巷道断面部分刷扩段围岩变形方案及巷道过构造或煤巷段围岩变形控制方案,经现场应用,效果良好。
[Abstract]:The stability of the surrounding rock of the tunnel has always been the key concern of the coal engineering technology, especially with the increasing of the mining depth of the coal mine, the high temperature, the high ground stress and the high osmotic pressure, the rheological behavior of the deep well soft rock roadway with the time effect is more obvious, Therefore, the study of the rheology of deep soft rock is the premise of ensuring the long-term stability of the surrounding rock. In this paper, based on the results of the basic mechanical tests of the rock core and the grouting body under the 34 mining area, the stress-strain curves, the strength and the deformation characteristics and the damage form of the soft rock and the grouting body are analyzed according to the results of the basic mechanics tests of the rock core and the grouting body in the Suzhou city of Anhui Province, and the strength parameters of the grouting body are obtained. In this paper, the rheological and mechanical properties of the soft rock grouting body are studied, and the rheological property of the grouting body is selected. It is proposed that the rheological parameters have been given. It is found that the similarity of the test curve and the fitting curve is very high, indicating that the selected Xiyuan model is science. Based on the principle of deformation and treatment of the surrounding rock in the main body of the mining area under the 34 working area, the deformation and control scheme of the surrounding rock of the main tunnel of the next mining area is put forward, including the deformation control of the surrounding rock of the whole section of the roadway. in that scheme, the deformation scheme of the surrounding rock of the section of the section of the roadway section and the deformation control scheme of the surrounding rock of the tunnel through the structure or the coal roadway section are applied and the effect of the field application and the effect
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD322.4
本文编号：2508877
[Abstract]:The stability of the surrounding rock of the tunnel has always been the key concern of the coal engineering technology, especially with the increasing of the mining depth of the coal mine, the high temperature, the high ground stress and the high osmotic pressure, the rheological behavior of the deep well soft rock roadway with the time effect is more obvious, Therefore, the study of the rheology of deep soft rock is the premise of ensuring the long-term stability of the surrounding rock. In this paper, based on the results of the basic mechanical tests of the rock core and the grouting body under the 34 mining area, the stress-strain curves, the strength and the deformation characteristics and the damage form of the soft rock and the grouting body are analyzed according to the results of the basic mechanics tests of the rock core and the grouting body in the Suzhou city of Anhui Province, and the strength parameters of the grouting body are obtained. In this paper, the rheological and mechanical properties of the soft rock grouting body are studied, and the rheological property of the grouting body is selected. It is proposed that the rheological parameters have been given. It is found that the similarity of the test curve and the fitting curve is very high, indicating that the selected Xiyuan model is science. Based on the principle of deformation and treatment of the surrounding rock in the main body of the mining area under the 34 working area, the deformation and control scheme of the surrounding rock of the main tunnel of the next mining area is put forward, including the deformation control of the surrounding rock of the whole section of the roadway. in that scheme, the deformation scheme of the surrounding rock of the section of the section of the roadway section and the deformation control scheme of the surrounding rock of the tunnel through the structure or the coal roadway section are applied and the effect of the field application and the effect
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD322.4
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