地下矿山多中段老采空区群稳定性分析及控制措施研究

发布时间：2018-04-18 03:13

本文选题：采空区 + Mathews稳定图解法　；参考：《武汉工程大学》2015年硕士论文

【摘要】：近年来,随着经济的快速发展对资源量需求的增加,国内金属非金属矿山的开采总量不断攀升,造成许多矿山面临采空区治理的难题。尤其是从上个世纪就开始开采的老矿山,采空区的处理更是迫在眉睫。目前针对采空区的稳定性分析大都只是单一的数值分析或者理论分析,没有有效的将这两种方法结合,对采空区的稳定性进行综合分析讨论,得到更为准确的结果。本文根据新疆金滩金矿的采空区现状,使用三轴试验测定岩石的力学参数,结合理论分析方法和数值模拟分析方法,对矿区内的3个矿体的采空区进行分析,综合两种分析方法的结果,找出最危险的采空区区域,并提出采空区的处理方案。在理论分析方面,采用经过修正的Mathews稳定图解法,通过调查矿区内的矿体赋存状况、岩石质量指标、节理裂隙的发育情况、采空区的形状及大小等数据,使用Mathews稳定图解法评价矿体内每个开采水平采空区的稳定性。在数值模拟方面,采用使用较广的有限元分析软件Ansys对矿区内的采空区进行稳定性分析,通过分析开挖之后沿矿体走向、X轴及Z轴剖面的位移、应力及弹性应变云图与顶板和矿柱上的关键节点的位移变化和应力变化情况,分析各开采水平采空区的稳定性。最后,综合以上两种分析方法的结果,列出各矿体内的关键采空区,对关键采空区进行充填处理。根据矿山的实际条件,提出可行的采空区充填方法,并对采空区充填之后的效果进行论证,以对矿山以后的生产提供参考。
[Abstract]:In recent years, with the rapid development of economy and the increasing demand for resources, the total amount of mining in domestic metal non-metal mines is increasing, resulting in many mines facing the problem of goaf treatment.Especially in the old mines which began to be mined in the last century, the treatment of goaf is urgent.At present, the stability analysis of goaf is mostly a single numerical analysis or theoretical analysis, there is no effective combination of the two methods, the stability of the goaf is analyzed and discussed, and more accurate results are obtained.According to the current situation of goaf in Jintan Gold Mine in Xinjiang, the mechanical parameters of rock are measured by triaxial test, and the goaf of three orebodies in the mining area are analyzed by combining theoretical analysis method and numerical simulation analysis method.Based on the results of two analysis methods, the most dangerous goaf area is found out, and the treatment scheme of goaf is put forward.In terms of theoretical analysis, the modified Mathews stability graphic method is used to investigate the occurrence of ore bodies, rock quality indexes, the development of joints and fissures, the shape and size of goaf, and so on.Mathews stability diagram method is used to evaluate the stability of each mining level goaf in the mine.In the aspect of numerical simulation, the stability of goaf in the mining area is analyzed by using the widely used finite element analysis software Ansys, and the displacement along the X axis and Z axis section of the orebody after excavation is analyzed.The stress and elastic strain cloud map and the displacement and stress changes of the key nodes on the roof and pillar are analyzed, and the stability of each mining level goaf is analyzed.Finally, according to the results of the above two analysis methods, the key goaf in each mine is listed, and the key goaf is filled.According to the actual conditions of the mine, a feasible method of goaf filling is put forward, and the effect of goaf filling is demonstrated to provide a reference for the future production of the mine.
【学位授予单位】：武汉工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD32

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