【作者】 陈金平；

【导师】 盛建龙；

【作者基本信息】 武汉科技大学 ， 采矿工程， 2011， 硕士

【摘要】 在FLAC^3D数值模拟的过程中,最重要的是模拟中采用的本构模型与实际的围岩环境吻合,由于金山店粉状矿体性质的特殊性,采用普通的土壤和岩土所用的mohr-coulomb本构模型显然忽视了它的蠕变特性和碎胀特性。本文分析粉状矿体所表现出来的变形特性,选择比较合适的poyting-thomson粘弹性本构模型,以此修改FLAC^3D软件源程序文件,通过visual studio 2005自定义poyting-thomson模型的动态链接库文件（.dll）内嵌于FLAC^3D软件源程序库内,作为FLAC^3D软件数值模拟的本构模型。本论文针对粉矿矿体建立起精确的数值模拟模型对巷道的锚喷网支护提供合理的建议。首先,在数值模拟的参数获取上,一方面在现场位移监测数据的基础上,经过位移反分析得到;另一方面通过实测的原岩物理力学参数得到。其次,在建立模型的过程中,拟定出6种模拟巷道围岩的方案,通过对比分析,最终选择需开挖无破裂区围岩模型。再次,在本构模型的选择上,通过自带的mohr-coulomb模型和二次开发的poyting-thomson模型对比分析,揭示了巷道围岩变形机制,同时比较彼此的优缺点,最后确定poyting-thomson本构模型作为该粉矿岩体模拟所使用的模型。然后,在围岩稳定性分析上,通过Fish语言编写了合理的支护结构,围岩模型,以及单元体的安全系数程序,运用FLAC^3D数值模拟分析围岩稳定情况。最后,在锚喷网结构参数的选择上分别从锚杆类型、锚杆的长度、锚杆的排距、围岩支护刚度等几个主要影响围岩变形破坏的因素进行对比分析,最终选择适合该粉矿巷道的支护方式和合理支护参数,以此作为实际施工中的前期预备和参考依据。更多还原

【Abstract】 In the numerical simulation of the process, the most important is to simulate the constitutive model used in the surrounding environment and the actual match, due to the nature of Jinshandian special powdered ore bodies, using common soil and rock used in the mohr-coulomb The constitutive model is clearly ignored its hulking creep characteristics and properties. Based on the analysis based on this powder Kuangti shown on the basis of the deformation properties, select the more appropriate poyting-thomson viscoelastic constitutive model, as Xiugai FLAC^3D software source documents, through visual studio 2005 custom full by Ding - Thomson model is embedded in the software source code repository FLAC^3D as FLAC^3D numerical simulation software, the constitutive model.In this thesis, the body set up for powder ore accurate numerical simulation model of the bolting and shotcrete net to provide reasonable protection recommendations. First, the parameters for the numerical simulation on the one hand in the field on the basis of displacement monitoring data, obtained through the displacement back analysis; the other hand, the original rock by measuring the physical and mechanical parameters are. Secondly, in the model building process, to work out six kinds of simulation programs roadway, by comparing the final selection to be no excavation of rock fracture zone model. Again, the choice of the constitutive model, through the built-mohr-coulomb model and the secondary development of poyting-thomson model of comparative analysis reveals the surrounding rock deformation mechanism, and compare the advantages and disadvantages to each other to finalize poyting-thomson constitutive model as a simulation of the rock mineral powder used by the model. Then, in the surrounding rock stability analysis, written by Fish a reasonable support structure, rock models, and procedures for the safety factor of unit cell, the use of numerical simulation FLAC^3D the stability of surrounding rock. Finally, in the shotcrete on the choice of network structure parameters, respectively, from the anchor type, anchor length, anchor the row spacing, stiffness of surrounding rock deformation and failure of several major factors that affect the rock were analyzed, the final choice The fine ore for roadway support parameters and reasonable manner, as the actual construction of the pre-preparation and reference.更多还原