松软厚煤层采区巷道注浆加固及支护技术研究

发布时间：2018-06-10 21:13

本文选题：Maag + 渗透注浆理论　；参考：《西安建筑科技大学》2015年硕士论文

【摘要】：注浆加固是土木工程中常用的岩土体加固技术。随着注浆材料及注浆工艺的进步,新型注浆加固技术及其工程运用研究也愈加受到重视。本文以韩城矿业公司下峪口煤矿为工程依托,开展高渗透性早强注浆材料的注浆工艺、注浆参数、煤体加固效果及应用研究,对矿山生产与安全具有重要意义。为了找到适合松软厚煤层的注浆加固材料,从注浆理论、注浆材料、注浆技术和支护方式等方面,对巷道周围的煤岩体进行室内试验、地面模拟注浆试验和井下注浆试验。理论探究:首先分析了下峪口煤矿煤田的形成过程;其次对Maag渗透注浆理论进行了补充修正,分析了注浆压力对于渗透注浆的影响;再次基于弹塑性理论,推导了劈裂注浆的启劈压力的求解方法;估算出了下峪口煤矿21308巷道的松动圈范围;最后依据煤岩体裂隙发展机理,推测出裂隙条数与裂隙宽度的大致关系,并据此关系对灌注系数?的合理性进行了验证。室内试验:对不同密度下的煤与聚氨酯搅拌后进行了无侧限抗压强度试验,发现聚氨酯对于煤岩体有很大的胶结作用;同时为了工程应用,还对用于充填的水泥-黄土浆液进行了无侧限抗压强度试验。地面模拟试验:通过自制的煤体注浆加固装置,进行了地面模拟注浆试验,计算分析了密闭空间下的煤体注浆加固的可行性。井下试验:通过多次井下注浆试验,得到了合适的注浆加固封孔及管路设计方案,并对现阶段的注浆加固方案进行了优化;根据锚杆拉拔试验结果,叙述了现行支护方式的一些不足,并提出了巷道加固的初步方案。
[Abstract]:Grouting reinforcement is a commonly used rock and soil reinforcement technology in civil engineering. With the progress of grouting materials and grouting technology, the new grouting reinforcement technology and its engineering application have been paid more and more attention. Based on Xiayukou Coal Mine of Hancheng Mining Company, this paper is of great significance to mine production and safety by developing grouting technology, grouting parameters, coal reinforcement effect and application of high permeability early-strength grouting materials. In order to find suitable grouting reinforcement materials for soft and thick coal seam, laboratory tests, ground simulation grouting tests and underground grouting tests were carried out on coal and rock mass around roadway from the aspects of grouting theory, grouting materials, grouting technology and supporting methods. Theoretical research: firstly, the formation process of coal field in Xiayukou coal mine is analyzed; secondly, the Maag permeable grouting theory is modified to analyze the influence of grouting pressure on permeable grouting; thirdly, based on elastic-plastic theory, This paper deduces the solution method of splitting pressure of split grouting, estimates the loosening circle range of 21308 roadway in Xiayukou Coal Mine, and finally, according to the fracture development mechanism of coal and rock mass, infer the approximate relationship between the number of cracks and the width of fractures. And on the basis of the relationship between the perfusion coefficient? The rationality of the method is verified. Laboratory test: the unconfined compressive strength test of different density of coal and polyurethane was carried out. It was found that polyurethane has great cementation effect on coal and rock mass, and for engineering application, The non-lateral compressive strength test of cement-loess slurry used for filling was also carried out. Ground simulation test: through the self-made coal body grouting reinforcement device, the ground simulation grouting test was carried out, and the feasibility of the coal body grouting reinforcement under the closed space was calculated and analyzed. Underground test: through many underground grouting tests, a suitable grouting reinforcement sealing and pipe design scheme is obtained, and the grouting reinforcement scheme at the present stage is optimized, according to the test results of anchor rod drawing, This paper describes some shortcomings of current supporting methods and puts forward a preliminary plan for roadway reinforcement.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD353

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