深部大规模开采岩石破裂失稳模拟实验研究
发布时间：2019-01-29 20:20
【摘要】：随着我国浅部矿产资源日益减少以及采掘设备的大型化,矿产资源的^u懫逐渐向深部和大规模两个方向发展,深部矿体所处的高地应力、高渗透压以及高地热的不良条件和大规模开采的剧烈扰动都严重威胁到采场围岩的稳定性。本文依托深部铁矿床超大规模开采过程围岩破裂失稳演化规律及动态调控机制研究科研课题,以设计开采深度为900m,年产量为2700万吨的马城铁矿为背景矿山,通过室内试验、数值模拟以及物理相似模拟实验等方法,对马城铁矿深部大规模开采过程中采场围岩的变形破坏特征进行研究,主要研究内容和成果如下:1)在室内进行矿、岩的基本岩石力学实验以及物理模拟相似材料配比试验,获取矿岩抗压强度、抗拉强度、粘聚力以及内摩擦角等基本参数,确定矿岩物理相似材料的配,为后续的数值模拟和物理模拟研究提供基本参数;2)在充分了解矿山实际地质概况和工程概况的基础上,运用数值模拟的方法对深部采场开挖进行模拟,分析深部采场开挖前后,采场围岩应力位移时空演化规律以及塑性区的变化情况;3)选择VIC-3D非接触式全场应变测量系统以及压力盒等联合监测手段,利用YJ203大尺度相似材料加载模拟试验台,在预加载荷的作用下,对深度为900m的矿体进行了的深部大结构参数采场开挖的相似模拟试验。从宏观和微观上分析深部大规模开采过程中采场围岩的变形破坏特征、应力和位移的时空演化规律。结合数值模拟试验以及相似材料模拟试验的数据和成果,得到了马城铁矿深部大结构参数采场围岩应力、位移以及变形破坏的规律,为矿山的安全生产提供一定的帮助。
[Abstract]:With the decreasing of shallow mineral resources in China and the large-scale development of mining equipment, the mineral resources are gradually developing towards deep and large scale, and the deep orebodies are under high ground stress. The stability of surrounding rock of stope is seriously threatened by high permeability pressure, bad condition of high geothermal and severe disturbance of large-scale mining. In this paper, based on the research on the evolution law of rock fracture instability and dynamic control mechanism during the super-large scale mining process of deep iron ore deposit, taking the design mining depth of 900m and the annual output of 27 million tons of Macheng Iron Mine as the background, the laboratory tests are carried out. The deformation and failure characteristics of surrounding rock in deep mining of Maicheng Iron Mine are studied by numerical simulation and physical similarity simulation. The main research contents and results are as follows: 1) the ore is carried out indoors. The basic rock mechanics experiment and the physical simulation similar material proportion test, obtains the ore rock compressive strength, the tensile strength, the cohesive force and the internal friction angle and so on basic parameter, determines the mineral rock physical similar material match, To provide the basic parameters for the subsequent numerical simulation and physical simulation research; 2) on the basis of fully understanding the actual geological and engineering situation of the mine, the deep stope excavation is simulated by numerical simulation method, and the deep stope excavation before and after excavation is analyzed. Spatial-temporal evolution of stress and displacement of surrounding rock and change of plastic zone in stope; 3) choosing the VIC-3D non-contact full-field strain measurement system and pressure box, and using the YJ203 large-scale similar material loading simulator, under the action of pre-loading. The similar simulation test of deep large structural parameter mining excavation was carried out for the orebody with depth of 900m. The characteristics of deformation and failure of surrounding rock in deep mining and the evolution of stress and displacement in time and space are analyzed from macro and micro aspects. Combined with the data and results of numerical simulation test and similar material simulation test, the rules of stress, displacement and deformation failure of surrounding rock in deep large structural parameters of Maicheng Iron Mine are obtained, which provide certain help for safe production of mine.
【学位授予单位】：华北理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD861.1;TD313
[Abstract]:With the decreasing of shallow mineral resources in China and the large-scale development of mining equipment, the mineral resources are gradually developing towards deep and large scale, and the deep orebodies are under high ground stress. The stability of surrounding rock of stope is seriously threatened by high permeability pressure, bad condition of high geothermal and severe disturbance of large-scale mining. In this paper, based on the research on the evolution law of rock fracture instability and dynamic control mechanism during the super-large scale mining process of deep iron ore deposit, taking the design mining depth of 900m and the annual output of 27 million tons of Macheng Iron Mine as the background, the laboratory tests are carried out. The deformation and failure characteristics of surrounding rock in deep mining of Maicheng Iron Mine are studied by numerical simulation and physical similarity simulation. The main research contents and results are as follows: 1) the ore is carried out indoors. The basic rock mechanics experiment and the physical simulation similar material proportion test, obtains the ore rock compressive strength, the tensile strength, the cohesive force and the internal friction angle and so on basic parameter, determines the mineral rock physical similar material match, To provide the basic parameters for the subsequent numerical simulation and physical simulation research; 2) on the basis of fully understanding the actual geological and engineering situation of the mine, the deep stope excavation is simulated by numerical simulation method, and the deep stope excavation before and after excavation is analyzed. Spatial-temporal evolution of stress and displacement of surrounding rock and change of plastic zone in stope; 3) choosing the VIC-3D non-contact full-field strain measurement system and pressure box, and using the YJ203 large-scale similar material loading simulator, under the action of pre-loading. The similar simulation test of deep large structural parameter mining excavation was carried out for the orebody with depth of 900m. The characteristics of deformation and failure of surrounding rock in deep mining and the evolution of stress and displacement in time and space are analyzed from macro and micro aspects. Combined with the data and results of numerical simulation test and similar material simulation test, the rules of stress, displacement and deformation failure of surrounding rock in deep large structural parameters of Maicheng Iron Mine are obtained, which provide certain help for safe production of mine.
【学位授予单位】：华北理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD861.1;TD313
【参考文献】
相关期刊论文 前10条
1 何瑞峰;李万涛;吕斌;;地面预注浆工艺在田兴铁矿主井区的应用[J];现代矿业;2015年12期
2 谢和平;高峰;鞠杨;;深部岩体力学研究与探索[J];岩石力学与工程学报;2015年11期
3 赵毅;周小平;钱七虎;;Progressive failure processes of reinforced slopes based on general particle dynamic method[J];Journal of Central South University;2015年10期
4 张爱民;;中国恩菲设计的思山岭铁矿采选工程项目建设正式全面启动[J];中国有色金属;2015年14期
5 何满潮;郭平业;;徐州矿区深部开采热害治理现场试验研究[J];煤炭工程;2015年04期
6 何满潮;;深部软岩工程的研究进展与挑战[J];煤炭学报;2014年08期
7 张t，
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