Coal-mine gas injection system and jet ejector used in coal-mine gas injection system

Abstract

The invention provides a coal-mine gas injection system and a jet ejector used in the coal-mine gas injection system, and belongs to the technical field of mine safety. The technical problem to be solved is to provide the coal-mine gas injection system and the jet ejector used in the coal-mine gas injection system; the injection system includes a monitoring host, a data information conversion andtransmission device, gas dilution units and signal repeaters; the monitoring host and the data information conversion and transmission device are arranged on the ground, the monitoring host is connected with the data information conversion and transmission device, the gas dilution units and the signal repeaters are arranged in a coal-mine well, the plurality of gas dilution units are arranged in different operation regions in the coal-mine well, and the gas dilution units are connected through the signal repeaters.

Description

technical field [0001] The invention relates to a coal mine gas ejection system and a jet ejector used therein, belonging to the technical field of mine safety. Background technique [0002] According to the mining methods and geological conditions of my country's coal mines, more than 80% of the coal mines adopt retreating coal mining, and a large amount of gas will be emitted during the coal mining process. Therefore, coal production enterprises invest huge sums of money every year to solve the problem of gas exceeding the limit, but so far still It is not perfect enough. Through the gas drainage system, the gas in the coal seam can be pumped, discharged and discharged. Due to the special geographical environment underground, there are still dead angles and blind spots. For example: as the coal mining face continues to lengthen, the problem of gas and accumulation in the upper corner of the retreating coal mining face becomes more and more serious. Here, therefore, an ext...

AI Technical Summary

Problems solved by technology

[0005] 1. After the ejector is installed in the dead corner or blind gas area, open the valve and the equipment starts to work. When the gas concentration drops, the ejector continues to work and cannot be started and stopped automatically, resulting in waste of air volume and affecting other air movements. equipment operation

[0006] 2. The air compressor in the fan room works continuously for a long time, which will easily affect the service life of the equipment

[0007] 3. Unable to uniformly implement system management

[0008] 4. The gas concentration cannot be detected and controlled intuitively and in real time. Often when the gas concentration is high, the on-site staff take some measures in a panic, and even evacuate the site, so it is impossible to achieve scientific prediction and prevention in advance

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