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Rock mass quality evaluation method based on ultrasonic drilling imaging technology and fractal method

A technology of rock mass quality evaluation and borehole imaging, which is applied in the field of engineering survey, can solve the problems of large discrete analysis conclusions, time-consuming and labor-intensive problems, and achieve the effects of high research value, shortened construction period, and fast and accurate evaluation

Inactive Publication Date: 2021-08-17
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

This technology is widely used in engineering, but the analysis is still mainly in the manual analysis stage, resulting in large dispersion of analysis conclusions, time-consuming and labor-intensive, and it is urgent to establish an accurate and fast intelligent automatic analysis method

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  • Rock mass quality evaluation method based on ultrasonic drilling imaging technology and fractal method
  • Rock mass quality evaluation method based on ultrasonic drilling imaging technology and fractal method
  • Rock mass quality evaluation method based on ultrasonic drilling imaging technology and fractal method

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Embodiment Construction

[0025] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0026] The invention provides a rock mass quality evaluation method based on ultrasonic drilling imaging technology and fractal method.

[0027] like figure 1 As shown, the method includes the following steps:

[0028] S1: Carry out the first engineering survey drilling construction, determine the diameter of the drilling hole, and carry out the whole hole coring work;

[0029] S2: Analyze the lithological characteristics of the borehole, divide the characteristic strata, calculate the RQD value of the core, and analyze the rock quality of different strata;

[0030] S3: After drilling to the end, if there is a casing, take out the casing and clean the hole;

[0031] S4: Carry out ultrasonic borehole imaging measurement of the entire borehole, and comp...

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Abstract

The invention provides a rock mass quality evaluation method based on an ultrasonic drilling imaging technology and a fractal method, and belongs to the technical field of engineering investigation. The method comprises the steps that firstly, a drill hole is formed in a stratum or a rock mass through a drilling technology; then a hole wall image of the drill hole is obtained in situ through the ultrasonic drilling imaging technology, and due to the self-similar characteristics of an internal structural surface of the rock mass, a fractal box dimension value of the hole wall image can be obtained by utilizing the fractal method according to the characteristics; and then a quantitative relation between the fractal box dimension value of the hole wall image and the rock quality is established, so that the rock quality in the detected stratum is rapidly and accurately evaluated without taking a rock core, the construction period is shortened, and especially the exploration efficiency is improved in a deep construction process.

Description

technical field [0001] The invention relates to the technical field of engineering survey, in particular to a rock mass quality evaluation method based on ultrasonic drilling imaging technology and fractal method. Background technique [0002] With the increase in the depth of resource exploitation, human engineering activities are also gradually developing to deep strata. The deep formation is a complex geological body composed of various media and multiphase physical and mechanical fields. Under the joint action of the occurrence environment of in-situ stress, high ground temperature, high osmotic pressure and the strong disturbance of deep space development and construction, it often leads to underground Sudden dynamic disasters such as rockburst, water inrush, fault dislocation, and local subsidence occurred during the excavation of the project. The accurate detection and evaluation of engineering rock mass quality is the basis for predicting and controlling the risks o...

Claims

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Application Information

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IPC IPC(8): E21B47/00E21B49/02
CPCE21B47/00E21B49/02
Inventor 张月征纪洪广权道路付桢
Owner UNIV OF SCI & TECH BEIJING
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