An ultrasonic scanning imaging device and method for the inner wall of a borehole

Abstract

The invention provides an ultrasonic scanning imaging device for the inner wall of a borehole, which includes an external unit, a guide pipe body and a scanning unit; the external unit includes a numerical control module and a wind speed control device; the numerical control module is connected to the scanning unit, and the wind speed control device is provided with a blower. The cylinder is connected with the wind speed control device and the guide pipe body; a magnetic traction line is set between the numerical control module and the scanning unit; The motor shaft of the motor is connected with a transmission shaft, and the transmission shaft is connected with the ultrasonic range finder; the ultrasonic range finder is provided with an ultrasonic probe. In addition, the present invention also provides a scanning imaging method of the above-mentioned ultrasonic scanning imaging device for the inner wall of the borehole. The device of the present invention can realize the three-dimensional scanning imaging of the inner wall of the borehole, obtain the three-dimensional scanning image of the entire borehole, and realize the detection of the collapsed hole position of the borehole.

Description

technical field [0001] The invention belongs to the technical field of coal mining, and in particular relates to an ultrasonic scanning imaging device and method for the inner wall of a borehole. Background technique [0002] Coal mining conditions in most areas of the country are harsh, the mining depth is large, the gas content in the coal seam is high, the pressure is high, the gas permeability of the coal seam is low, the geological structure conditions are complex, and gas accidents are prone to occur. Reducing and preventing gas accidents has become an urgent problem in the field of coal mine safety. The problem. At present, the most common method of gas drainage in my country is to use boreholes to pre-drain the coal seam gas in the mining face. The most commonly used method of gas drainage is comprehensive gas drainage. Ground vertical-downhole horizontal directional drilling and underground coal seam drilling. Because the coal body becomes soft in the high-gassy so...

AI Technical Summary

Problems solved by technology

Therefore, the judgment of the location of the collapsed hole and the mastery of the layout of the entire length of the hole wall are important foundations for the prevention and control of the entire hole collapse. The traditional method of judging the location of the collapsed hole mostly relies on the amount of cuttings during the drilling process combined with the work experience of the worker's master. Make a rough judgment, the judgment accuracy is not high, the severity of the hole collapse is not clear, and the situation of the entire hole wall after the hole is drilled cannot be effectively grasped

There are problems such as inaccurate judgment of the position of the collapsed hole and unclear gradual change process of the hole circumference of the drilled hole

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