Study On The Optimization Of Ventilation System In Gaohe Energy Coal Mine

Mine ventilation system is an important part of the mine production system, which has a major impact on high and stable yield, disaster prevention and resilience and economic benefits. However, with the changes of natural conditions, production capacity and production layout, mine ventilation systems became more complex, and artificial calculation became more difficult. Therefore, modern techniques must be used to optimize the mine ventilation system to ensure the reliability of the system and safe production.Gaohe energy coal mine is a high-methane coal mine, the ventilation system is complex. Based on the status of the ventilation system of the Gaohe energy coal mine and by the method of a combination of field measurement, theoretical analysis and computer simulation, the thesis mainly focused on the following two aspects:(1) The roundtrip wind in the parallel intake roadway of the mine ventilation system has been optimized using network calculation, which has reduced the resistance of the system and improved the capacity of the mine for wind.The analysis result showed that the roundtrip wind exist in main intake air roadways in the mine west wing mining panel.The thesis proposed the optimization scheme to solve this problem,then simulated the scheme by use of the network calculation.The simulation results showed that pressure of the main fan in the central well dropped14.87Pa, whereas the air volume increased0.53m3/s, and pressure of the main fan in the Xiaozhuang well droped83.37Pa while the air volume increased2.97m3/s after the optimization, which reduced the resistance of the air intake system of the west wing mining panel and enhanced the capacity of the wind supply.(2)To optimize the ventilation system in the mine when the mining panel was isolated. Mine ventilation system is a dynamic system. When major disaster occurs, it’s necessary to close the accidents in mining area to prevent the expansion of the disaster and to protect the safety of the other mining panel, the main return air roadway and the shaft. But close the isolation gates maybe change the mine ventilation system and the operating point of the main fan, it may bring secondary disaster to mine. In order to improve the capacity to prevent disaster and disaster relief. The thesis proposed to set the optimization scheme in the mining panel of east wing, west wing and north wing in Gaohe energy mine, then simulated the isolated ventilation system by network calculation. In addition, the thesis put forward the optimization measures to ensure the appropriate scheme of optimization of the ventilation system in terms of the hidden danger of fan operating point and airflow stability in the schemes.