告成煤矿滑动构造带三软煤层巷道锚杆支护研究

发布时间：2018-06-04 07:37

本文选题：三软煤层巷道 + 滑动构造带　；参考：《西安科技大学》2015年硕士论文

【摘要】：三软煤层巷道支护是煤巷支护技术难题之一,本论文以河南告成滑动构造带三软煤层20161下付巷支护为研究对象,在分析巷道变形破坏特征的基础上,采用数值模拟、物理模拟及极限平衡圈理论分析相结合的方法,揭示了告成煤矿巷道变形破坏规律,确定了合理的支护参数和支护方案,为该矿三软煤层巷道支护设计提供了依据。通过现场取样和岩石力学实验,测定了告成煤矿三软煤层巷道围岩物理力学参数;通过巷道变形破坏规律实测,得出了巷道四周收敛变形,移近量最大达到850mm~950mm,以顶底收敛变形为主,是两帮变形量的1.27倍;运用数值计算及物理模拟分析了三软煤层巷道变形破坏机理,得出了告成煤矿巷道主要表现为右帮破坏和顶底板下沉。据此,提出了反底拱巷道优化断面,数值模拟表明巷道获得了右帮受力往中上部转移,顶底板移近量降低的效果。基于软底板条件,分别建立了仅考虑顶板影响、考虑两帮—顶板影响、考虑底板—两帮—顶板共同影响的巷道顶板平衡拱和巷道平衡圈计算模型,给出了平衡拱的解析表达式,分析了巷道底板、两帮、顶板三者的相互影响关系,确定了支护参数的计算公式。收集了类似14条巷道支护参数,通过工程类比法结合巷道围岩平衡圈理论分析,确定了锚网索喷+帮中部4m锚杆+W型钢带联合支护方式。最后,通过物理及数值模拟对方案可靠性进行验证及评价。
[Abstract]:Roadway support in three soft coal seams is one of the difficult technical problems in coal roadway support. This paper takes 20161 soft coal seam underpaid roadway support in Gaocheng sliding structure belt of Henan Province as the research object, based on the analysis of the characteristics of roadway deformation and failure, adopts numerical simulation. By combining physical simulation with theoretical analysis of limit equilibrium circle, the deformation and failure law of roadway in Gaocheng Coal Mine is revealed, and the reasonable supporting parameters and supporting scheme are determined, which provides a basis for the roadway support design in three soft coal seam of Gaocheng Coal Mine. Through field sampling and rock mechanics experiment, the physical and mechanical parameters of surrounding rock of roadway in three soft coal seams of Gaocheng coal mine are measured, and the convergence deformation around roadway is obtained by measuring the law of roadway deformation and failure. The maximum displacement is 850mm / 950mm, which is mainly convergent deformation of the top and bottom, which is 1.27 times that of the two sides. The deformation and failure mechanism of the roadway in the three soft coal seams is analyzed by numerical calculation and physical simulation. It is concluded that the roadway of Goucheng coal mine is mainly reflected in the damage of the right side and the sinking of the roof and floor. Based on this, the optimized section of reverse arch tunnel is put forward. The numerical simulation shows that the right side forces are transferred to the middle and upper part of the tunnel, and the roof and floor movement is reduced. Based on the soft floor condition, the calculation models of roadway roof equilibrium arch and roadway equilibrium circle are established, which only consider the influence of roof, consider the influence of two sides and roof, consider the influence of floor and two sides, and give the analytical expression of equilibrium arch. The relationship among the floor, the two sides and the roof of the roadway is analyzed, and the formula of the supporting parameters is determined. The supporting parameters of 14 similar roadways are collected. By combining the engineering analogy method with the theoretical analysis of the surrounding rock equilibrium circle of the roadway, the combined support mode of the 4 m anchor bolt W type steel belt in the middle of the bolting wire mesh and shotcreting slope is determined. Finally, the reliability of the scheme is verified and evaluated by physical and numerical simulation.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD353.6

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