Comprehensive valuing method for characterization unit volume scale of jointed rock mass

Abstract

The invention discloses a comprehensive valuing method for the characterization unit volume scale of jointed rock mass. The method comprises the following steps: solving a density distribution function, a direction distribution function and a size distribution function; obtaining mechanical parameters of the rock mass and the structural surface; generating a reconstructed rock mass sample; extracting a rock mass structure as a sampling sample; building a synthetic rock mass model corresponding to the sample; calculating structural plane geometric parameters of the synthetic rock mass model of the current specified scale and equivalent mechanical parameters of the synthetic rock mass model; and obtaining the structural plane geometric parameters of the synthetic rock mass model and the appointed scale where the equivalent mechanical parameters of the synthetic rock mass model tend to be stable. According to the method, the rock and structural plane mechanical parameters determined by indoor tests are directly used, and calculation and analysis are simple; in a large reconstructed rock mass sample, the discrete type of the jointed rock mass sample under the same specified scale condition can be considered through same-scale multi-center-point sampling; when the characterization unit body scale is determined, mechanical parameters and geometric parameters are considered at the same time.

Description

technical field [0001] The invention belongs to the technical fields of civil engineering, water conservancy and hydropower engineering, and new energy engineering, and in particular relates to a method for comprehensively obtaining the scale of a representative volume element (REV) of a jointed rock mass, which is used for underground engineering, rock slopes, etc. Research on the value of mechanical parameters in the field of rock engineering. Background technique [0002] The formation process of rock is a long geological process. In the process of crystallization, deposition and metamorphism, due to the action of geological tectonic movement, a large number of almost irregular cracks will be formed inside the rock. The existence of these cracks will reduce the The mechanical indicators such as deformation modulus, strength, and bearing capacity of rocks threaten engineering safety. Therefore, it is of great academic and engineering significance to study the characteristi...

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Problems solved by technology

The method partially solves the defects of the theoretical method and experimental method, but its limitations are: (1) The particle discrete element numerical calculation method adopted is based on the assumption of microscopic parameters, and it is difficult to obtain the value of the microscopic parameters; (2) The process of calculating the REV scale It is necessary to construct a multi-scale numerical model of rock mass, and the existing methods cannot consider the discrete type of jointed rock mass samples; (3) the existing methods only consider the mechanical parameters, and do not consider the geometric parameters

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