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Laser measurement method and device for multi-point displacement of rock formation

A technology for rock formation and laser measurement, which is applied in earth-moving drilling, wellbore/well components, etc., and can solve problems such as equipment security threats

Active Publication Date: 2016-11-02
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the tunnel is a semi-concealed project built in the underground rock-soil medium, the displacement and deformation of the tunnel wall is one of the important factors affecting the ground settlement, construction safety and construction progress. Device security poses a significant threat

Method used

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  • Laser measurement method and device for multi-point displacement of rock formation
  • Laser measurement method and device for multi-point displacement of rock formation
  • Laser measurement method and device for multi-point displacement of rock formation

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Embodiment

[0028] In the multi-point displacement laser measurement method of rock formations, the laser beam excited by the laser transmitter hits the reflective sheet and is reflected back, which can be captured by the receiving device on the laser transmitter. The following steps are specifically adopted:

[0029] 1. First excavate a small-diameter borehole on the surrounding rock 2, such as figure 1 shown.

[0030] 2. According to the design requirements, press the first reflective sheet 4, the second reflective sheet 5, and the third reflective sheet 6 to the measurement point on the hole wall 1, wherein the first reflective sheet 4 is the reference reflective sheet, and record the other reflective sheets The circumferential angle with the first reflective sheet 4, such as figure 2 shown.

[0031] 3. Install the orifice positioning plate 10 at the end of the drilling entrance 3, the 0 scale of the dial 9 of the orifice positioning plate 10 is aligned with the first reflective she...

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Abstract

The invention relates to a rock stratum multi-point displacement laser measuring method and device. The device is composed of reflectors, a laser emitter and an orifice locating disk. A hole with a small aperture is drilled in a rock stratum, the laser emitter is installed at the aperture end, meanwhile, the reflectors are bonded to the positions, where measuring points are designed, of the wall of the hole, laser beams excited by the laser emitter shoot the reflectors and the datum points at the bottom of the drilled hole and are then reflected back, the reflected laser beams can be captured by a receiving device on the laser emitter, a collecting device of the laser emitter calculates and displays the distances from the reflectors to the laser emitter and from the datum points at the bottom of the hole to the laser emitter, the distance from the reflectors to the datum points at the bottom of the hole is obtained by subtracting the distance from the laser emitter to the reflectors by the distance from the laser emitter to the datum points at the bottom of the hole, the distance is measured at regular intervals and the difference value obtained by comparing the distances measured twice or multiple times is the desired displacement or the desired deformation.

Description

technical field [0001] The invention relates to a measuring method capable of measuring multi-point displacement or deformation of rock formations and a corresponding measuring device, especially a laser measuring method and device capable of measuring multi-point radial displacement of surrounding rock in a rock cavern. Background technique [0002] At present, my country has become the country with the largest number of tunnel projects, the most complex and the fastest development in the world. However, since the tunnel is a semi-concealed project built in the underground rock-soil medium, the displacement and deformation of the tunnel wall is one of the important factors affecting the ground settlement, construction safety and construction progress. Device security poses a significant threat. Accidents caused by excessive tunnel deformation, deformation, inclination or even collapse of surface buildings, and tunnel collapse are not uncommon. How to accurately and conven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00
Inventor 薛亚东李硕标杨文亮葛嘉诚
Owner TONGJI UNIV
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