Fissure measuring device matched with borehole television imager and using method

Abstract

The invention discloses a fissure measuring device matched with a borehole television imager and a using method. The fissure measuring device comprises a vertical outer cylinder, an inner cylinder for installing a probe of a boring imager and a power supply control box; a reflecting lens is arranged on the upper portion of a cavity of the outer cylinder, and a bore wall image observed through the outer cylinder can be reflected by the reflecting lens; scales are arranged on the inner wall, opposite to the position where the reflecting lens is located, of the outer cylinder, and semi-transparent comparison strips are arranged on the scales at intervals. The distance between a camera and the reflecting lens is adjusted by relatively moving the outer cylinder and the inner cylinder, the bore fissure breaking condition is completely recorded through the camera, and the fissure width is obtained by comparing scale or fissure width with the comparison strips. The simple optical principle is adopted so that the bore wall image parallel to the axial direction of the camera can vertically income the camera, the observing effect is improved, and quantitative description of the bore wall fissure and the separation layer width is achieved.

Description

technical field [0001] The invention relates to a borehole television imager. Background technique [0002] As an auxiliary survey method, the borehole TV imager is widely used in coal mining and some underground projects. It collects the panoramic image of the borehole wall through the camera, so that engineers and technicians can obtain the lithology type and rock thickness of the stratum. , crack development and other information. [0003] The development of fractures is an important index to evaluate the mechanical properties of rock formations, and it is very important to accurately measure the orientation and opening of fractures. As far as the current borehole TV imager is concerned, due to the limitation of its camera structure, it can only observe the whole picture of the hole wall rock through the borehole camera, and cannot quantitatively determine the width of the cracks in the borehole, the width of the abscission layer, etc. For structural joint information, ...

AI Technical Summary

Problems solved by technology

[0005]In order to overcome the problem that the existing borehole TV 3D imager is used in advance borehole detection and other projects, because the propulsion speed is difficult to be uniform, which makes the operation more difficult and more efficient Low technical defect, the present invention provides a kind of fissure measurement device supporting the borehole TV imager, which is used to quantitatively detect the development of borehole fissures, and provide an effective basis for judging the movement of rock formations

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