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Drill core direction recovery method

A recovery method and core technology, applied in the field of high-level radioactive waste geological disposal research, can solve the problems of incomplete splicing of drilled cores, inability to determine the exact orientation of structural planes of deep drilled cores, loss of valuable information, etc.

Active Publication Date: 2014-03-26
BEIJING RES INST OF URANIUM GEOLOGY
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AI Technical Summary

Problems solved by technology

However, during the drilling construction process, due to rock breakage, damage and other reasons, the drilled cores often cannot be completely spliced, resulting in the inability to determine the exact orientation of the structural plane of the deep drilled core, resulting in a large number of deep structure features in the core. loss of valuable information

Method used

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Embodiment Construction

[0022] The following structural drawings and implementation examples further illustrate the method for restoring the orientation of a drilled rock mass provided by the present invention.

[0023] A drilling core orientation recovery method, such as figure 1 shown, including the following steps:

[0024] (1) Core baseline delineation: if figure 2 As shown, the core 1 is connected in order from top to bottom in the direction close to the surface; the baseline 2 is delineated in the complete splicing section of each core, and the depth mark 3 is marked; when the baseline 2 is delineated, it should be ensured that The cores within the same baseline range are seamlessly spliced ​​to ensure that the relative orientations of each structural plane and the baseline are accurate. This baseline ends and is flagged for cases where the core cannot be spliced ​​due to chipping or breakage. A new baseline is marked on the next complete segment of the core. When delineating the baseline ...

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Abstract

The invention belongs to the technology of deep rock mass construction characteristic research in the field of high-level waste geological disposal research and the filed of engineering geological research, and particularly relates to a drill core direction recovery method. The method comprises the following steps: 1, drawing core base lines; 2, recording core structural faces; 3, measuring and explaining a borehole TV to obtain a borehole wall distribution diagram; 4, calibrating a core, determining reference faces and determining inclination of the reference faces; 5, determining the direction of the base lines, wherein an inclination value Zi of the reference faces is acquired according to a borehole TV measuring result, and then the direction of the base lines can be obtained according to the following equation and the relative positions of the reference faces and the base lines; 6, determining the inclination of the core structural faces, wherein the inclined values of the structural faces within the ranges of the base lines are determined according to the following equation and the relative positions of the structural faces within the ranges of the base lines. According to the technical scheme, the drill core direction recovery method can achieve system recovery of deep drill core structural face occurrence and further provide technical support for deep geological environment research.

Description

technical field [0001] The invention belongs to the research field of geological disposal of high-level radioactive waste and the technology of deep rock structure feature research in the field of engineering geology research, and specifically relates to a drilling core orientation recovery method. Background technique [0002] The orientation and scale of deep rock mass structural planes are important contents of deep geological environment investigation, and also the key information necessary for feasibility analysis and engineering design of deep underground engineering. For the geological disposal project of high-level radioactive waste, the distribution of structural planes of rock mass not only affects the mechanical properties of rock mass, but also provides potential migration channels for radioactive nuclides, which is a key factor affecting the stability and long-term safety of the project. [0003] In order to obtain the structural characteristics of deep rock mas...

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Application Information

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IPC IPC(8): E21B49/00E21B47/09E21B47/002
Inventor 陈伟明陈亮王驹苏锐宗自华王锡勇罗辉李亚伟田霄
Owner BEIJING RES INST OF URANIUM GEOLOGY
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