Device and method for directly and quickly determining coal seam drilling depth

Abstract

The invention relates to a device and a method for directly and quickly determining coal seam drilling depth. The device is characterized in that blades are arranged surrounding a moving device, a baffle plate is arranged in the moving device, gasifiable solid particles are placed on the front end of the moving device, the rear end of the moving device is connected with a rubber pipe in which high-pressure gas can be pumped, the pressure of the high-pressure gas is far higher than the pressure generated by gasification of the solid particles, an air outlet in the front end is opened backwards, and an air outlet in the rear end is opened forwards. Through the design, when high-pressure gas is inflated, the blades are enabled to open, and the moving device is pushed to move quickly and forwards; when the high-pressure gas is closed, the blades are closed, are integrated with the moving device and are smooth in appearance, additional resistance cannot be generated during backward moving, and the moving device can be conveniently pulled out of a drilling hole; finally, the drilling depth is determined through the length of the rubber pipe entering the drilling hole and the self length of the moving device; the determination technology is relatively simple, less time is consumed for determination work, a result can be quickly obtained, and the reliability of the result is relatively high because of direct measurement.

Description

technical field [0001] The invention relates to a device and a method for measuring the depth of a coal seam borehole, in particular to a device and a method capable of directly and quickly measuring the depth of a coal seam borehole. Background technique [0002] As we all know, drainage is a fundamental technical measure for gas control, and drilling drainage is the most commonly used coal seam gas pre-drainage method. [0003] To use boreholes to extract coal seam gas, it is necessary to construct gas drainage boreholes in the coal seam in the pre-drainage area; under the current market economy conditions, the wages of construction personnel directly depend on the length of their accumulated construction boreholes, and, For a single borehole, the greater the depth of the borehole, the greater the difficulty of construction; therefore, there is often a phenomenon that the borehole construction personnel falsely report the depth of the borehole. [0004] Falsely reporting ...

AI Technical Summary

Problems solved by technology

[0006] The above method has played an important role in measuring the depth of coal seam drilling; however, there are more or less limitations, such as the problem of economic cost, measurement accuracy and accuracy, and the intuitiveness of the measurement results and the simplicity of operation question etc.

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