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Deep rock mass quality detection method based on seismic waves while drilling and related device

A rock mass quality and seismic wave technology, applied in seismic signal processing, measurement, earthwork drilling, etc., can solve the evaluation of rock mass disturbance, structural plane and anisotropy, which is difficult to achieve, and it is difficult to achieve deep rock with a single drilling hole. Body structure evaluation and other issues to achieve the effect of accurate detection

Pending Publication Date: 2022-04-08
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

However, drilling often has the problem of one-hole view, and it is difficult to evaluate regional deep rock structural planes in a single drilling hole
At the same time, the drilling rig disturbs the rock mass during drilling and coring. It is difficult to completely restore the actual real stress state and structural properties in coring and laboratory tests. The evaluation of structural planes and anisotropy outside the hole is difficult. more difficult to achieve

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  • Deep rock mass quality detection method based on seismic waves while drilling and related device
  • Deep rock mass quality detection method based on seismic waves while drilling and related device
  • Deep rock mass quality detection method based on seismic waves while drilling and related device

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[0035] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0036] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure shall have ordinary meanings understood by those skilled in the art to which the present disclosure belongs. "First", "second" and similar words used in the embodiments of the present disclosure do not indicate any sequence, quantity or importance, but are only used to distinguish different components. "Comprising" or "comprising" and similar words mean that the elements or items appearing before the word include the elements or items listed after the word and their equivalents, without excluding other elements or items. Words such as "connected" or "connected" are not lim...

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Abstract

The invention provides a deep rock mass quality detection method based on seismic waves while drilling and related equipment, and the method comprises the steps: obtaining a seismic wave signal while drilling through a first seismic detector installed at the front end of a drill rod, and obtaining a seismic wave response signal on the surface of a detected deep rock mass through a second seismic detector arranged around a drill hole; obtaining a cross-correlation function signal through the seismic wave signal while drilling and the seismic wave response signal; a frequency dispersion curve is obtained based on the cross-correlation function signal, surface wave frequency dispersion inversion is carried out based on the frequency dispersion curve, and a transverse wave speed model of rock mass around the drill hole is obtained; longitudinal wave arrival time is determined based on the cross-correlation function signal, longitudinal wave velocity inversion is carried out based on the longitudinal wave arrival time, and a longitudinal wave velocity model of rock mass around the drill hole is obtained; based on the transverse wave velocity model and the longitudinal wave velocity model, the development characteristics of the structural surface of the deep rock mass are identified, so that the test can be completed in the drilling process of the drill rod, and the quality of the rock mass around the drill hole can be accurately detected.

Description

technical field [0001] The present disclosure relates to the technical field of rock mass survey, in particular to a deep rock mass quality detection method based on seismic waves while drilling and related devices. Background technique [0002] Drilling is an irreplaceable technical means in deep underground engineering investigation because of its intuitive nature of core, which can directly and effectively understand the formation lithology, geological structure, and other geological conditions. The physical and mechanical parameters of the deep rock mass can be obtained by judging the rock grade around the tunnel through core observation and mechanical tests. However, drilling often has the problem of one-hole view, and it is difficult to evaluate regional deep rock mass structural planes in a single drilling hole. At the same time, the drilling rig disturbs the rock mass during drilling and coring. It is difficult to completely restore the actual real stress state and ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/30G01V1/32E21B47/00E21B49/00
Inventor 刘鎏李邵军王栋
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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