深井大断面硐室围岩稳定性分析与支护技术

发布时间：2018-11-27 19:21

【摘要】：我国煤炭资源经历了近几十年的开采,浅部易采煤炭资源面临枯竭,煤炭深部开采已成为必然趋势。深井大断面硐室,由于其埋藏深,断面大,在进行支护设计时应综合考虑自然因素、工程因素及人为因素的影响。硐室的开挖过程是一个与工程的应力路径密切相关的过程,在施工过程中,围岩受到反复扰动,围岩的应力不断发生重分布,围岩变形也不断改变,围岩稳定性受到较大影响。论文在结合工程地质资料与室内试验数据的基础上,利用GTS对淮南矿业集团张集矿二副井主排水泵房的支护方案进行数值模拟,分析了围岩位移场和围岩应力场变化规律,并确定出最佳支护方案；通过对二副井马头门、主排水泵房及箕斗装载硐室等深井大断面硐室围岩的收敛变形进行定期监测分析可知,硐室围岩收敛量较小；通过对箕斗装载硐室钢筋应力监测数据进行分析,得出箕斗装载硐室与井筒的连接处压应力最大,在衬砌设计时必须增加该部位的支护强度。论文把张集矿二副井硐室群作为一个开放、动态的系统,研究施工顺序、开挖与支护方式等因素的动态响应规律,获得了自然和人为因素与深井连接硐室群围岩稳定性之间的内在规律。论文成果对解决深井连接硐室群可靠支护,有效预防大硐室破坏,确保煤矿生产安全,有着较为重要的指导意义。
[Abstract]:The coal resources of our country have experienced the exploitation in recent decades, the shallow and easy mining coal resources are faced with exhaustion, the deep mining of coal has become an inevitable trend. Because of its deep buried depth and large section, the influence of natural factors, engineering factors and human factors should be taken into account in the design of support. The excavation process of the chamber is a process closely related to the stress path of the engineering. During the construction process, the surrounding rock is repeatedly disturbed, the stress of the surrounding rock is continuously redistributed, the deformation of the surrounding rock is constantly changed, and the stability of the surrounding rock is greatly affected. On the basis of engineering geological data and laboratory test data, this paper uses GTS to simulate the supporting scheme of the main drainage pump house in the second auxiliary shaft of Zhangji Mine, Huainan Mining Group, and analyzes the variation law of displacement field and stress field of surrounding rock. And determine the best support scheme; Through the periodic monitoring and analysis of the surrounding rock deformation of the large section chamber in deep wells, such as Maotou door of the second auxiliary well, main drainage pump room and skip loading chamber, it is known that the convergence amount of surrounding rock in the chamber is relatively small. By analyzing the stress monitoring data of steel bar in the skip loading chamber, it is concluded that the pressure stress at the junction between the skip loading chamber and the shaft is the largest, and the support strength of this part must be increased in the design of lining. In this paper, the chamber group of the second auxiliary shaft in Zhangji Mine is regarded as an open and dynamic system, and the dynamic response law of construction sequence, excavation and supporting method is studied. The inherent law between natural and human factors and the stability of surrounding rock mass of deep well connection chamber group is obtained. The results of this paper are of great significance to solve the problem of reliable support of deep well connecting chamber group, effectively prevent the destruction of large chamber and ensure the safety of coal mine production.
【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】：TD354

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