Method for controlling air leakage in goaf of mine and device for controlling air leakage in goaf of mine

Abstract

The invention discloses a method and device for controlling goaf air leakage of a mine. The method comprises the steps that 1, the air speed in a return roadway and the air speed of the position 5-10 m away from an air inlet of a mine fan in an intake airway are acquired, the static pressure of a goaf leakage hole and the static pressure in a connection roadway between the goaf leakage hole and a transportation roadway are acquired, and the air speed values and static pressure values are transmitted to a PLC; 2, the PLC records, stores and processes the air speed values and the static pressure values; 3, a main control computer of the PLC starts and stops the mine fan remotely in a centralized mode according to the air speed values and static pressure values and regulates the operating frequency of the mine fan through a frequency converter, consistency of air supply rate and air return rate of a vein ventilation system is realized by means of the airflow rate and pressure balancing principle, and the goaf leakage hole in the ventilation system is made to be located in the positive pressure area. According to the method, operation is easy, safe and reliable, and practicality is high.

Description

technical field [0001] The present invention relates to a method and a device for preventing air leakage in goafs of mines, in particular to a method and device for preventing goafs in mines where working stopes and goafs are connected and it is difficult to control air leakage in goafs by adopting airtight and filling technical measures. Air leakage method and device. Background technique [0002] In the process of mining, the mined area becomes a goaf. The surrounding environment of some mines is complex, and there are a large number of goafs without geological records and mining records in the mining area. These goafs are distributed in disorder, and their direction, slope and shape Irregular or extremely irregular seriously damage the overall structure and mining order of the mine, and it is also one of the direct causes of major disasters and accidents in the mine. In order to ensure safety, the extraction ventilation system is adopted in the mine. However, with the co...

AI Technical Summary

Problems solved by technology

In order to ensure safety, the extraction ventilation system is adopted in the mine. However, with the continuous increase of the mining depth and the continuous expansion of the area of ​​the working stope, there are more and more places where the underground working stope and the goaf are connected, and the area of ​​the connection is getting larger and larger. Large, the air leakage in the goaf increases

The increase of the air leakage through the opening of the goaf will inevitably reduce the effective air volume and the utilization rate of the effective air volume of the mine ventilation system, which will bring great difficulties to the mine safety management. , so that the reliability and stability of the underground ventilation system is poor, and some roadways have no wind or the wind flow is reversed, which seriously affects the normal safe production of the mine.

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