风氧化软岩巷道变形机理及其控制研究

发布时间：2018-05-29 16:31

本文选题：风氧化软岩 + 变形机理　；参考：《太原理工大学》2015年硕士论文

【摘要】：软岩引起的煤矿井巷的破坏现象已经非常普遍，严重影响着煤矿生产安全、效率和效益的提高，因此已经引起国内外学术界和相关部门的高度重视。在构造应力的作用下，受风氧化影响的软岩节理裂隙发育、破碎，在此类软弱围岩中布置的巷道变形强烈，往往由于采取的巷道支护措施不当，使得大量破碎软岩巷道的返修率居高不下，不仅浪费大量人力物力财力，而且直接影响矿井高效生产，危及工作人员的人身安全。风氧化软岩巷道的支护技术已经成为一个亟待解决的问题。以山西长治羊头岭红旗煤业有限公司9#煤层皮带、轨道、回风巷为研究对象，针对9#煤层巷道围岩受风氧化严重且受构造应力、下部15#煤层开采时的动压影响，支护困难的问题，在总结前人的研宄成果和工程类比的基础上，对风氧化软岩巷道的变形破坏特征、变形破坏影响因素和变形机理进行了深入研宄，在9#煤层巷道顶底板和两帮采取煤岩样，并通过实验室试验获得了其物理力学参数；对9#煤层巷道皮带巷顶板进行钻孔窥视，并由9#煤巷道所取的煤岩样实验室物理力学参数通过岩体参数计算软件RocLab得到了9#煤巷道围岩岩体力学性质参数。以皮带巷、轨道巷和回风巷所处的围岩地质条件与开采条件为基础，过数值模拟，，对大巷围岩的应力分布、围岩变形情况、围岩破坏情况、岩层移动情况和煤柱上的应力分布进行了分析，确定了巷道发生失稳破坏的机理。根据围岩完整性分析、巷道变形原因分析以及变形数值分析，结合工程类比的方法，提出了锚索+锚杆+网+U型钢支架联合支护方案及其支护参数。
[Abstract]:The destruction of coal mine roadway caused by soft rock has been very common, which seriously affects the safety, efficiency and benefit of coal mine production. Therefore, it has been paid great attention to by academic circles and related departments at home and abroad. Under the action of tectonic stress, the joints and fractures of soft rock affected by wind oxidation are developed and broken, and the roadway arranged in this kind of soft surrounding rock is deformed strongly, which is often due to the improper supporting measures taken in the roadway. The repair rate of a large number of broken soft rock roadways is high, which not only wastes a large amount of manpower, material and financial resources, but also directly affects the efficient production of the mine and endangers the personal safety of the staff. The supporting technology of wind-oxidized soft rock roadway has become an urgent problem to be solved. Taking 9# coal belt, track and return wind roadway of Changzhi Yangtouling Hongqi Coal Industry Co., Ltd., as the research object, aiming at the serious wind oxidation and structural stress in the surrounding rock of 9# coal roadway, the dynamic pressure of the lower 15# coal seam mining is studied. On the basis of summing up the previous research results and engineering analogy, the deformation failure characteristics, deformation failure factors and deformation mechanism of wind-oxidized soft rock roadway are deeply studied. Coal and rock samples were taken from the roof and floor of the roadway and the two sides in the 9# coal seam, and the physical and mechanical parameters were obtained through laboratory tests, and the roof of the belt roadway in the 9# coal seam was drilled and peeped. The mechanical properties of the surrounding rock mass of 9# coal roadway are obtained by using the physical and mechanical parameters of the coal and rock samples taken from 9# coal roadway through the calculation software of rock mass parameter RocLab. Based on the surrounding rock geological conditions and mining conditions of belt roadway, track roadway and return wind roadway, the stress distribution, surrounding rock deformation and surrounding rock failure of roadway surrounding rock are simulated by numerical simulation. The rock movement and stress distribution on coal pillar are analyzed, and the mechanism of roadway instability and failure is determined. According to the analysis of the integrality of surrounding rock, the cause analysis of roadway deformation and the numerical analysis of deformation, combined with the method of engineering analogy, this paper puts forward the combined support scheme of U-shaped steel support with anchor cable and anchor net and its supporting parameters.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD353

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