兰家沟钼矿-560m水平大巷稳定性分析
发布时间：2018-07-29 14:25
【摘要】：针对金属矿山开采水平大巷围岩变形失稳破坏问题,本文以兰家沟钼矿-560m水平大巷为例,在以往资料和研究基础上,通过理论分析和数值模拟,对水平大巷围岩失稳与破坏机理、支护结构作用进行深入研究。首先在总结巷道围岩应力场影响因素基础上,通过力学分析和数值模拟,针对层状围岩结构面特性,采用RFPA二维数值模拟软件,通过围岩破坏过程、位移变形和声发射现象分析,分析得出不同结构面间距对围岩稳定性影响规律；根据上述研究成果,归纳总结常用支护形式的特点,通过对有无支护体系时围岩破坏过程、位移变形和声发射现象分析,得出支护结构对围岩稳定性影响规律；最后针对兰家沟钼矿深埋平巷中典型区段建立MIDAS三维模型,分析支护初期围岩应力、应变变化规律及支护结构的内力变化,并通过现场测试分析验证支护结构的合理性。为兰家沟钼矿巷道支护提供理论依据,以确保整个生产线的安全稳定,保证井工开采安全进行。
[Abstract]:Aiming at the problem of deformation instability of surrounding rock of horizontal roadway in metal mining, taking Lanjiagou molybdenum mine -560m horizontal roadway as an example, on the basis of previous data and research, theoretical analysis and numerical simulation are carried out. The instability and failure mechanism of surrounding rock in horizontal roadway and the function of supporting structure are studied in depth. Firstly, on the basis of summarizing the influencing factors of surrounding rock stress field of roadway, through mechanical analysis and numerical simulation, according to the characteristics of layered surrounding rock structure plane, RFPA two-dimensional numerical simulation software is used to simulate the failure process of surrounding rock. Based on the analysis of displacement deformation and acoustic emission phenomenon, the influence of different structural plane spacing on the stability of surrounding rock is obtained. According to the above research results, the characteristics of common supporting forms are summarized, and the failure process of surrounding rock when there is support system is summarized. Based on the analysis of displacement deformation and acoustic emission phenomenon, the influence of supporting structure on the stability of surrounding rock is obtained. Finally, the MIDAS 3D model is established for typical sections of deep buried roadway in Lanjiagou molybdenum mine to analyze the stress of surrounding rock in the initial stage of support. The strain variation law and the internal force change of the supporting structure are analyzed and the rationality of the supporting structure is verified by field test and analysis. It provides a theoretical basis for roadway support in Lanjiagou molybdenum mine to ensure the safety and stability of the whole production line and to ensure the safety of mining.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD322.4
本文编号：2152966
[Abstract]:Aiming at the problem of deformation instability of surrounding rock of horizontal roadway in metal mining, taking Lanjiagou molybdenum mine -560m horizontal roadway as an example, on the basis of previous data and research, theoretical analysis and numerical simulation are carried out. The instability and failure mechanism of surrounding rock in horizontal roadway and the function of supporting structure are studied in depth. Firstly, on the basis of summarizing the influencing factors of surrounding rock stress field of roadway, through mechanical analysis and numerical simulation, according to the characteristics of layered surrounding rock structure plane, RFPA two-dimensional numerical simulation software is used to simulate the failure process of surrounding rock. Based on the analysis of displacement deformation and acoustic emission phenomenon, the influence of different structural plane spacing on the stability of surrounding rock is obtained. According to the above research results, the characteristics of common supporting forms are summarized, and the failure process of surrounding rock when there is support system is summarized. Based on the analysis of displacement deformation and acoustic emission phenomenon, the influence of supporting structure on the stability of surrounding rock is obtained. Finally, the MIDAS 3D model is established for typical sections of deep buried roadway in Lanjiagou molybdenum mine to analyze the stress of surrounding rock in the initial stage of support. The strain variation law and the internal force change of the supporting structure are analyzed and the rationality of the supporting structure is verified by field test and analysis. It provides a theoretical basis for roadway support in Lanjiagou molybdenum mine to ensure the safety and stability of the whole production line and to ensure the safety of mining.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD322.4
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