3-D Network Modeling For Stochastic Discontinuities With Deterministic Information And Rock Block Stability Analysis Of Surrounding Rock Masses

Stability analysis related with rock mass can help us correctly understand the law of deformation and failure to judge the safety status of rock mass. To analyze the stability of rock mass, first we must make the spatial combination clear, Select a reasonable analysis model, find out the key blocks, estimate of the likely damage situation and probability, Thus we can analysis the stability of rock mass and take effective measures for protection. In general, discontinuities are randomly distributed. Its uncertainty increases the difficulty of research on rock mass.This paper takes the project of the research on underground disposal of high-level radioactive waste as the engineering background and obtains relevant data through field measurements. According to the images of fracture, this paper uses the image processing method to obtain roughness of structural plane and prepare image processing procedures with Matlab. Then it uses the Barton Formula to determine the structure strength of fracture. Based on VS2008, it writes a program called Data-C which can adjust the data. In this paper it adjusts the relevant data obtained through field measurements with Data-C. Data-C can further help us solve the measurement problems and it lays the foundation for the establishment of the Modeling for random discontinuities with determinate information.It also does the statistical analysis of probability distribution based on the data of outcrops and establishes random three-dimensional network model of fracture. On the basis of it, it refines the three-dimensional network model by adding deterministic infonnation and establishes the3-D network modeling for stochastic discontinuities with deterministic information. The three dimensional network systems of rock fracture was developed by using VS2008and OpenGL. On the basis of it, this paper can search out the possible destabilization blocks in accordance with the size of roadway section. Based on the identified block information, It takes a possible depth of the roadway as an example and established the finite element mode of underground cavern. By considering the influence of the initial geostress and the secondary stress field of surrounding rock, it uses the program of ABAQUS/Explicit to calculate stability of the underground cavern. In addition, it calculates the stability only under gravity force and evaluates the differences between the two ways, which can provide theoretical basis for actual engineering application.