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RQDt optimal threshold t solving method based on RQD inversion

An optimal threshold and inversion technology, applied in 3D modeling, extraction from basic elements, design optimization/simulation, etc., can solve the problem that the optimal threshold t is no longer optimal, cannot reflect RQD anisotropy, etc. question

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
The research on the optimal threshold t in these two aspects has certain limitations in the applicable conditions. It is a method of solving the optimal threshold t in a specific theory and background. When the background or model changes, the optimal The threshold t will no longer be optimal

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  • RQDt optimal threshold t solving method based on RQD inversion
  • RQDt optimal threshold t solving method based on RQD inversion
  • RQDt optimal threshold t solving method based on RQD inversion

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Embodiment Construction

[0103] The present invention will be further described below with reference to the accompanying drawings.

[0104] refer to Figure 1 ~ Figure 3 , an RQD based on RQD inversion t The optimal threshold t solution method includes the following steps:

[0105] 1) Calculation of rock mass quality based on RQD index, the process is as follows:

[0106] 1.1: Select the rotary drilling method according to the geotechnical category and survey requirements;

[0107] 1.2: Using 75mm caliber N-type double-layer core tube and diamond drill bit, the drilling caliber and drilling tool specifications comply with the current national standards, and the hole caliber meets the requirements of sampling, testing and drilling technology;

[0108] 1.3: According to the designed drilling position, the handheld GPS measurement is used for field positioning. After the drilling is completed, the GPS is used for formal and accurate measurement;

[0109]1.4: During the drilling process, a measurement...

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Abstract

An RQDt optimal threshold t solving method based on RQD inversion belongs to the RQDt optimal threshold t solving field, 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; and (4) arranging an optimal threshold t solving methodbased on RQD inversion. The RQD theory, the fracture network model, the generalized RQD theory and inversion calculation are combined, the optimal threshold t of RQDt is solved, and the RQDt optimal threshold t solving method based on RQD inversion is provided. The method is clear, the obtained threshold t can reflect the real rock mass quality, and the method is suitable for solving the optimal threshold t of the rock mass RQDt.

Description

technical field [0001] The invention relates to an RQD based on RQD inversion t The optimal threshold t solution method, especially the present invention is based on the RQD index, the crack network model and the generalized RQD theory, and calculates the RQD by inversion t The range of optimal threshold t and the optimal threshold t value, providing an RQD based on RQD inversion t Optimal threshold t solution method, belonging to RQD t The optimal threshold t for solving the field. Background technique [0002] In nature, RQD is an important index to characterize the quality of rock mass, and RQD has anisotropy. The anisotropy of RQD can also be seen from the expansion of the calculation formula from borehole RQD to generalized RQD. 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 direct...

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Application Information

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IPC IPC(8): G06F30/20G06T17/00G06T11/20G06Q10/06
CPCG06Q10/06395G06T11/20G06T17/00G06F30/20
Inventor 胡高建
Owner SHAOXING UNIVERSITY
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