RQDt anisotropy solving method based on RQD and optimal threshold t
An anisotropic, optimal threshold technology, applied in 3D modeling, drawing from basic elements, design optimization/simulation, etc., can solve problems that cannot reflect RQD anisotropy, have not obtained RQD anisotropy calculation formula, and have not yet Obtaining RQD anisotropy solution methods and other issues
Inactive Publication Date: 2021-03-09
SHAOXING UNIVERSITY
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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
[0009] 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 yet given a calculation method for the optimal threshold t, so the calculation formula of RQD anisotropy based on the optimal threshold t has not been obtained, and the RQD parameters that can best reflect the quality of the rock mass have not yet been obtained. Anisotropic solution method
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[0140] The present invention will be further described below with reference to the accompanying drawings.
[0141] Refer Figure 1 ~ 4 , A RQD based on RQD, optimal threshold T t Anisotropic solving method, including the following steps:
[0142] 1) The rock mass calculation based on the RQD indicator, the process is as follows:
[0143] 1.1: Select the rollover drilling method according to geotechnical category and survey requirements;
[0144] 1.2: The 75mm diameter N-type double core tube and diamond drill bit, drilling caliber and drilling specifications are in accordance with the provisions of the current national standards, and the aperture caliber meets the requirements of sampling, testing and drilling process;
[0145] 1.3: According to the design drilling position, use the handheld GPS measurement to be positioned in the field. After the drilling is completed, the GPS is officially accurately determined;
[0146] 1.4: During the drilling drilling, a piece of charge per 10...
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An RQDt anisotropy solving method based on RQD and an optimal threshold t belongs to the field of RQDt anisotropy solving, and comprises the following steps: (1) making rock mass quality calculation based on an RQD index; (2) generating and sectioning a rock mass three-dimensional fracture network model; (3) drawing an RQDt anisotropy diagram; (4) arranging an optimal threshold t solving method based on RQD inversion; and (5) arranging an RQDt anisotropy solving method. The RQD theory, the fracture network model, the generalized RQD theory and inversion calculation are combined, the optimal threshold t and anisotropy of the RQDt are solved, and the RQDt anisotropy solving method based on the RQD and the optimal threshold t is provided. The method is clear, and is suitable for anisotropic solution of rock mass RQDt.
Description
Technical field [0001] The present invention relates to a RQD based on RQD, optimal threshold T t Anisotropic solving method, especially the present invention based on RQD indicators, fracture network models, and generalized RQD theory, and inversion calculates RQD t The range of optimal threshold T and the optimal threshold T value give RQD t The method of solving anisotropy provides a RQD based on RQD, optimal threshold T t Anisotropic solving method, belongs to RQD t Anisotropic solution area. Background technique [0002] In nature, anisotropy is everywhere. The rock mass exhibits a very obvious anisotropy, and its nature changes with the observation angle and the measurement direction. The origin of the anisotropy change in the rock mass can be attributed to the geological origin, such as the unique hierarchy in the sedimentary rock, a natural hole in the basalt, the lacy structure in the lacyclone and the cleavage in slate, and run through these The fault, etc. of the rock ...
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IPC IPC(8): G06F30/20G06T17/00G06T11/20G06Q10/06
CPCG06Q10/06395G06T11/20G06T17/00G06F30/20
Inventor 胡高建
Owner SHAOXING UNIVERSITY