深井沿空预掘顺槽（泄水巷）高强锚网支护技术研究与应用

发布时间：2018-06-01 01:29

本文选题：沿空巷道 + 围岩稳定性控制　；参考：《山东科技大学》2017年硕士论文

【摘要】：本论文以彭庄煤矿1301泄水巷为工程背景,通过应用现场调研分析、理论分析、计算机数值分析、现场应用监测等方法,研究了深井沿空巷道复合锚网支护技术。首先从沿空巷道围岩变形破坏特征入手,对采空区和巷道上覆岩层结构的力学模型作了分析,明确了上覆岩层破断后形成的弧形三角块结构的稳定性对巷道稳定性的决定作用,还分析了巷道变形在采煤工作面在回采过程中的不同阶段的特点;其次,探讨了沿空留小煤柱掘巷的可行性,根据合理煤柱宽度的确定原则,以及和其他矿区沿空巷道条件的比较,得出了留4.5m小煤柱掘巷可行的结论;第三,介绍了高强高预应力让压锚杆支护技术,详细阐述了高强高预应力让压锚杆支护作用机理,对锚杆让压构件进行了合理的设计,提高了锚杆支护系统的支护效率;第四,根据1301泄水巷矿压显现规律,并借助计算机数值模拟软件,理论计算确定了支护方案及支护参数;第五,为了保证1301泄水巷顶板支护试验成功,对锚杆的性能进行了井下测试,锚杆系统(杆体、托盘、螺纹、螺母、树脂)的整体表现良好,满足了巷道支护要求。文章的最后综合分析了 1301泄水巷整体支护效果,通过对泄水巷的顶、底板和两帮的位移的观测,可以得出泄水巷围岩变形在可接受的科学范围之内,达到了支护预期目标。论文中的支护方案及支护参数科学合理,很好地解决了彭庄煤矿泄水巷的安全支护问题,降低了煤矿生产成本,提高了煤矿生产效率,也为相邻采区和类似矿井的支护提供一种方法和思路。
[Abstract]:Based on the engineering background of 1301 drainage roadway in Pengzhuang Coal Mine, the combined bolting and mesh supporting technology of deep goaf roadway is studied by using field investigation and analysis, theoretical analysis, computer numerical analysis, field application monitoring and so on. Starting with the deformation and failure characteristics of surrounding rock in goaf roadway, the mechanical model of overlying rock structure in goaf and roadway is analyzed, and the influence of the stability of arc triangle block structure on roadway stability is made clear. The characteristics of different stages of roadway deformation in the process of mining face are also analyzed. Secondly, the feasibility of driving roadway with small pillar along the gob is discussed, and the principle of determining the reasonable width of coal pillar is discussed. Compared with the conditions of roadway along the goaf in other mining areas, the feasible conclusion of driving roadway with 4.5m small coal pillar is obtained. Thirdly, the supporting technology of high strength and high prestress concession bolt is introduced, and the mechanism of high strength and high prestress concession bolt supporting is expounded in detail. The supporting efficiency of the bolting support system is improved by reasonable design of the pressure-bearing member of the bolt. Fourthly, according to the law of mine pressure appearance in 1301 drainage roadway, and with the help of computer numerical simulation software, the supporting scheme and supporting parameters are calculated and determined theoretically. Fifthly, in order to ensure the success of roof support test in 1301 drainage roadway, the performance of bolt system (bar body, tray, thread, nut and resin) is tested downhole, which meets the requirement of roadway support. At the end of this paper, the overall support effect of 1301 drainage roadway is analyzed synthetically. Through the observation of displacement of roof, bottom plate and two sides of drainage roadway, it can be concluded that the surrounding rock deformation of drainage roadway is within an acceptable scientific range, and the expected goal of supporting is achieved. The supporting scheme and supporting parameters in the paper are scientific and reasonable, which can solve the problem of safe support in Pengzhuang coal mine drainage roadway, reduce the production cost of coal mine, and improve the production efficiency of coal mine. It also provides a method and train of thought for supporting adjacent mining areas and similar mines.
【学位授予单位】：山东科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD353

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