A device for detecting the environment in a borehole for in-situ stress measurement and its detection method

Abstract

The invention relates to an in-situ stress measurement device for detecting the environment in a borehole and a detection method thereof, and belongs to the field of in-situ in-situ stress testing instruments and equipment for underground deep engineering sites. The device includes a cylinder type detection vehicle, an adapter sleeve, an image information acquisition device, and an image information acquisition control system. The wide-angle camera in the cylinder type detection vehicle is connected to the main board through a signal line, and the main board is connected to the signal conversion module. The group converts the image data information, and the signal conversion module transmits the converted image information to the image information acquisition control system through the external signal interface / or the wireless transmission module. The invention is used for the detection of the environment inside the borehole before the ground stress test in the casing stress relief method, and then identifies and judges whether the environmental conditions in the hole meet the installation and test requirements of the ground stress test equipment, avoids blindness or subjective guesswork based on experience, and greatly improves the performance of the test. Improve test success rate, reduce test cost, and transmit data in real time.

Description

technical field [0001] The invention relates to a device for measuring the environment in a borehole and a detection method thereof for in-situ stress measurement, especially for the research on the in-situ stress measurement and distribution law of deep underground engineering, and is useful for improving the success rate of in-situ stress testing and guarantee testing for casing stress relief methods. The accuracy and reliability of the results are of great value, and belong to the field of in-situ stress testing instruments and equipment for underground deep engineering sites. Background technique [0002] In-situ stress is the fundamental force that causes deformation and destruction of mining, water conservancy and hydropower, civil construction, roads and various underground rock and soil excavation projects. Scientific and accurate in-situ stress measurement is to determine the mechanical properties of engineering rock mass and analyze the stability of surrounding rock...

AI Technical Summary

Problems solved by technology

[0006] In summary, there are several problems in the in-situ stress measurement drilling environment detection device currently developed: (1) It is difficult to peep and detect the in-hole environment of the small hole section actually used for measurement, and it is still impossible to detect the in-hole environment in the small hole. (2) There is no effective equipment to realize automatic detection of the environment in the hole; (3) Non-contact laser ranging is generally used for distance measurement, and the field test results show that small holes are easy to form Water mist and floating rock dust make it difficult for light to penetrate, and the non-contact measurement method has large errors

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