Rock mass homogeneous region division method based on improved concatenated table method

Abstract

The invention provides a rock mass homogeneous region division method based on an improved train connection table method. The method comprises the steps of recording occurrence and trace length of joints of two regions; adding a trace length coordinate axis on the Schmidt diagram, wherein the Schmidt diagram and the trace length coordinate axis form a cell element; respectively extracting occurrence and trace length data of joints of the two areas, projecting the data in the new coordinate system, establishing a column connection table on the basis of the two projection drawings, and obtaining a chi-square value of chi-square test; determining the significance level and the degree of freedom of chi-square test; and performing homogeneous region division on the joints of the two regions according to chi-square test. A column linked table method is improved, and a coordinate axis for displaying joint trace length information is added, so that occurrence and trace length changes can be detected at the same time in the homogeneous region division process. The invention provides a method for determining the significance level instead of selecting a specific significance level to compare the two regions, so that the division result of the homogeneous region is more persuasive.

Description

technical field [0001] The invention relates to the technical field of homogeneous area division of rock mass, in particular to a method for dividing homogeneous area of ​​rock mass by improving the contingency table method. Background technique [0002] Joints are usually formed by multiple stages of geological tectonic movements, and each stage of geological movement has its unique geological characteristics, resulting in very complex geometric parameters of joints (such as occurrence and trace length, etc.). Joints have a strong impact on the mechanical and hydraulic properties of rock mass. Even in the same area, the properties of rock mass in different engineering parts may still be different. Different rock masses can be divided into the same homogeneous zone in the case of similar geometric properties. Rock masses in the same homogeneous zone can be analyzed or reinforced by using the same discrete joint network model or the same design scheme, thus saving a lot of m...

AI Technical Summary

Problems solved by technology

However, the existing multi-factor discrimination method only considers multiple attributes of joints independently, but does not consider the coupling relationship between different attributes. Independent consideration of each attribute will reduce the accuracy of homogeneous area division

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