Study on 3-D network simulation of rock mass discontinuity based on geological model
[Objective]Each structural plane in rock mass restricts and influences each other rather than being completely inde-pendent.To make the various structural planes coupling effectively,a three-dimensional network simulation is conducted on the structural plane,and a three-dimensional model of the structural plane is established to achieve three-dimensional visualization expression of various structural planes.[Methods]The mixed data structure technique is used to construct precise geological models of Ⅰ,Ⅱ and Ⅲ types of structural planes in rocks.Monte Carlo+dynamic checking method is used to simulate the Class Ⅳ structural plane.Based on the actual distribution pattern of structural planes,the preliminary model established by the Monte Carlo method is dynamically verified using the principle of grouping nearest,and the preliminary model is gradually modi-fied.Finally,the model coupling of class Ⅰ,Ⅱ,Ⅲ and N structural planes is carried out on the Vgeo platform.[Results]The result show:a 3D geological coupling model of class Ⅰ,Ⅱ and Ⅲ structural plane of X hydropower station,including rock layer,weak interlayer and fracture zone,is successfully constructed.Two groups of class Ⅳ structural plane samples were calcu-lated according to actual measurements,the 3 D model of the actual exposed structural plane of the excavation face is obtained and the final model is constructed by dynamic checking.By combining the constructed multiple 3 D geological body models and 3 D structural plane models,the 3 D visual expression and reconstruction of various structural planes in the building behind the dam of X hydropower Station are realized.[Conclusion]The result show that the class Ⅰ,Ⅱ and Ⅲ structural plane models are in good agreement with the measured 2 D sections.The errors of trace length and volume density of class Ⅳ are smaller,ranging from-3.13％to-1.77％and 6.36％to 7.69％,respectively,which are consistent with the actual revealed structural plane distribution.The model has good accuracy and reliability.Based on the model,engineers can quickly obtain the visual analysis result of the structural plane and the structural plane distribution map of any elevation and any section,and can also realize geological advance prediction through digital drilling,and provide intuitive analysis basis for the treatment of foundation and seepage problems.
rock mass structural surface3 D network modelgeological modelchecked dynamicinfluence factor
万方数据
维普
