| With the development of economy and science&technology, more and more large-size underground projects has occur at domestic and foreign. Consequent the difficult of large empty area stability evaluation and stability control is also growing. So large empty area stability evaluation and control has become a serious problem. Compare with the traditional stability evaluation of rock mass classification systems and the stability evaluation theory based on interdisciplinary generated, this paper aims to evaluate empty area stability from more intuitive and quantitative perspective.In the case of a large chamber works depot requires detailed evaluation of the stability, expand the stability analysis based on the rock mass classification and 3D laser scanning. Get different regions’rock mass classification, stability evaluation method based on Mathews stability chart,3D laser scanning to obtain an empty area data and numerical simulation based on the structure surface survey results, Under the premise of geological survey, experimental rock mechanics, structural surface analysis and survey. Then obtain the corresponding models and the density of cross-sectional consistent with experimental needs.Obtained different regions’caving data and elastic-plastic deformation characteristics through analysis equal density sectional from different models. From caving area, caving depth, caving volume and other aspects to illustrate the regional situation, Thus evaluate and analysis the stability of corresponding region. Obtain stability evaluation of specific area through said means then propose support parameters. |
