Fan frequency conversion control system and method for air pressure dynamic balance of mine stope

Abstract

The invention discloses a fan frequency conversion control system and method for air pressure dynamic balance of a mine stope. The fan frequency conversion control system comprises an alternating-current frequency converter console, a counter rotating axial flow fan, carbon monoxide sensors, air speed sensors, a differential pressure sensor, an intrinsically safe power supply, and an intrinsically safe junction box, wherein the alternating-current frequency converter console has two sets of alternating-current frequency converters; the frequency converters, the counter rotating axial flow fanand the intrinsically safe power supply are arranged in an inlet alley; the air speed sensor 1 is arranged in the air inlet alley; the differential pressure sensor and the air speed sensor 2 are arranged in an air return alley; and the two carbon monoxide sensors are arranged in an air return corner region. Data such as carbon monoxide content, air quantity, air pressure and the like is real-timemonitored, ventilation quantity of a mining working surface is automatically controlled, so that the mining working surface and the environment air pressure automatically achieve dynamic balance, thus the safety production of the mining working surface is achieved when a plurality layers of mine goafs are communicated with each other, the working efficiency, the precision degree and the safety degree are improved; the fan is driven by frequency conversion, so that the fan has energy-saving effect, broad adaptability, social benefits and economic benefits.

Description

technical field [0001] The invention relates to the field of mine disaster prevention and control, in particular to a fan frequency conversion control system and method for wind pressure dynamic balance of mine mining face. Background technique [0002] Spontaneous combustion of coal not only burns precious resources, but also produces a large amount of CO, CO 2 and SO 2 Toxic and harmful gases, such as toxic and harmful gases, endanger the health and life of workers, pollute the environment, and can also induce the occurrence of gas and coal dust explosion accidents, which are major disasters that hinder the safe production of coal mines. Achieving wind pressure balance to prevent harmful gas influx and air leakage is one of the effective means to prevent coal spontaneous combustion disasters. The Datong mining area has a long history of mining, and the mining volume has increased significantly year by year in recent years. The long-term main mining coal seam is the Jur...

AI Technical Summary

Problems solved by technology

The manual adjustment method requires manual reading of CO concentration and pressure difference monitoring data, and manual adjustment of the windshield area. Due to limited conditions, these tasks cannot be carried out at the same time, and there are large errors and obvious delays. After adjusting the wind pressure balance at a certain moment, if the ambient air pressure changes, the booster system cannot make timely adjustments, and must be passively adjusted after manual detection is found, which also lays hidden dangers for safe production

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