Q anisotropy solving method based on laser scanning, RQD and RQDt anisotropy

Abstract

A Q anisotropy solving method based on laser scanning, RQD and RQDt anisotropy belongs to the field of Q anisotropy solving, and comprises the following steps: (1) quickly obtaining structural plane three-dimensional laser scanning; (2) drawing a structural surface pole diagram and an inclined rose diagram; (3) making rock mass quality calculation based on RQD indexes; (4) generating and sectioning a rock mass three-dimensional fracture network model; (5) drawing an RQDt anisotropy diagram; (6) an optimal threshold t solving method based on RQD inversion; (7) arranging an RQDt anisotropy solving method; and (8) arranging a Q anisotropy solving method. Three-dimensional laser scanning, an affinity propagation algorithm, an RQD theory, a fracture network model, a generalized RQD theory and inversion calculation are combined, the optimal threshold t and anisotropy of RQDt are solved, Q anisotropy is solved, and the Q anisotropy solving method based on laser scanning, RQD and RQDt anisotropy is provided. The method is clear, and is suitable for anisotropy solution of the rock mass Q.

Description

technical field [0001] The invention relates to a laser scanning, RQD, RQD t Anisotropic Q anisotropy solution method, especially the present invention is based on three-dimensional laser scanning, nearest neighbor propagation algorithm, RQD index, crack network model and generalized RQD theory, inversion calculates RQD t The range of optimal threshold t and the optimal threshold t value, gives the RQD t Anisotropic solution method, and based on RQD t Anisotropy, the solution method of Q anisotropy is given, and a method based on laser scanning, RQD, RQD t The method for solving anisotropic Q anisotropy belongs to the field of solving Q anisotropy. Background technique [0002] The appearance and quality of the rock mass strongly depend on the degree of anisotropy of the rock mass, and the stability of the rock mass is determined by the quality of the rock mass. Some geological phenomena have also proved this point. For example, during the excavation process of a roadwa...

AI Technical Summary

Problems solved by technology

Deer proposed the concept of borehole RQD in 1964. Due to the following two shortcomings in the application of borehole RQD: whether the threshold value of 100 mm is reasonable for different engineering scale rock masses; the drilling direction of the borehole is limited, and the obtained RQD can only reflect local rock mass conditions, but cannot reflect RQD anisotropy

[0011] The anisotropy of RQD directly affects the quality of the rock mass, and the mechanism of the influence of RQD anisotropy on the quality of the rock mass has not yet been explored clearly

In terms of the threshold t, no scholars have given the calculation method of the optimal threshold t, so the RQD based on the optimal threshold t has not been obtained. t Anisotropy calculation formula, and the RQD that can best reflect the quality of rock mass has not yet been obtained t Anisotropy solution method

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