Method for determining nonpenetrating jointed and fractured rock mass deformation parameter

Abstract

The invention discloses a method for determining nonpenetrating jointed and fractured rock mass deformation parameter, comprising the following steps: 1) data is collected, fractured group analysis is carried out on the fracture of the nonpenetrating jointed and fractured rock mass of a sample rock, a plurality of fractured groups having main influence are collected, and the values of the inclination, the connection ratio, the interval and the thickness ratio of each fracture are obtained by detection; 2) the values of the deformation modulus, the Poisson Ratio of a filler in the nonpenetrating fracture of each fracture collected in step 1, and the deformation modulus of and the Poisson Ratio of the rock are obtained through indoor rock mechanics experiments; 3) the deformation model of anonpenetrating fractured rock mass is built; 4) the exact values of all parameters obtained in step 1 and step 3 are substituted in a model formula obtained in step 3 so as to obtain a plurality of nonpenetrating fractured rock mass deformation modulus and the Poisson ratio values in the sample rock. The value error is obviously lowered, which can satisfy engineering requirements or design requirements.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering investigation, and relates to a method for determining deformation parameters of non-penetrating joint fissure rock mass. Background technique [0002] The scientific determination of deformation parameters of non-penetrating fractured rock mass is extremely important in the design, stability evaluation and formulation of reinforcement measures for rock mass engineering such as underground caverns, rock slopes, and rock subgrades. The deformation parameters of traditional non-perforated fractured rock mass are determined through costly field large shear experiments or unrepresentative indoor experiments. Although these two determination methods have been widely used in engineering and have summed up a lot of application experience, but These methods cannot directly reflect important factors such as non-perforated fractures that affect the deformation properties of rock mass, and t...

AI Technical Summary

Problems solved by technology

The deformation parameters of traditional non-perforated fractured rock mass are determined through costly field large shear experiments or unrepresentative indoor experiments. Although these two determination methods have been widely used in engineering and have summed up a lot of application experience, but These methods cannot directly reflect important factors such as non-penetrating fractures that affect the deformation properties of rock mass, and the determined deformation parameters of non-penetrating fractured rock mass have large errors, which are difficult to meet engineering needs.

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