A gas sampling and anti-blocking device in goaf of coal mine

Abstract

The invention discloses a gas sampling and anti-blocking device in a coal mine goaf, comprising: a rigid sleeve; a pressure dividing head, which is a cone structure, and the bottom surface of the cone is fixedly connected with the top of the rigid sleeve; a plurality of air intake elements , the air inlet of each air intake element is opposite to the side wall of the rigid sleeve, and each air intake element is fixed on the side wall of the rigid sleeve and communicates with the inside of the rigid sleeve. The air intake element enters the inside of the rigid casing; the side of the air intake element is inclined downward with an angle, and when the coal block falls from above, it will fall down the slope; the invention provides a gas sampling and anti-blocking device for goafs in coal mines , used in the goaf tube monitoring system, when the tube is laid in the goaf, the anti-blocking device is installed at the end of the tube, which can increase the compression resistance and anti-destruction performance of the tube, and prevent the tube from being blocked. Improve the pumping effect of the beam tube.

Description

technical field [0001] The invention relates to the technical field of goaf gas analysis and monitoring, in particular to a gas sampling and anti-blocking device in a coal mine goaf. Background technique [0002] Coal spontaneous combustion is one of the main disasters in coal production. Since coal spontaneous combustion mainly occurs in hidden places such as gobs and fracturing coal pillars, it is difficult to find spontaneous combustion at the initial stage. Once found, the location of the high-temperature area cannot be determined and the fire cannot be detected. Timely firefighting, so as to cause major vicious accidents, so the localization of spontaneous combustion fire source has always been one of the major problems in coal mine safety production. The mined-out area is the most prone to spontaneous combustion underground. Many existing mines use beam tube monitoring systems to monitor the goaf or collect data for analysis. However, due to the development of fully me...

AI Technical Summary

Problems solved by technology

The mined-out area is the most prone to spontaneous combustion underground. Many existing mines use beam tube monitoring systems to monitor the goaf or collect data for analysis. However, due to the development of fully mechanized mining technology, most of them use the caving method The empty area increases the speed of excavation and improves the coal mining efficiency. For the bundled pipes laid on the floor, it is easy to have excessive pressure, crush the outer casing, and finally crush the bundled pipes; It is easy for the coal dust suspended in the air to enter the casing from the outer casing hole, or the small coal lumps are easy to enter the casing when it collapses, causing blockage when collecting gas

In view of the problem that the casing will be crushed and blocked when the casing collapses, it is urgent to design a pressure-resistant and anti-blocking outer casing, which will help to smoothly collect gas at various points and provide a basic guarantee for coal spontaneous combustion research.

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