Research On Optimization Of Deep Ventilation System In Self-propelled Iron Mines

Mine ventilation system is a complex and dynamic system,and various factors are interrelated.The ventilation system plays an important role in the mine's production safety,disaster resistance,and improving the economic efficiency of the enterprise.This article takes the safety production of the mine ventilation system as the starting point,and takes the optimization of the ventilation system of the self-propelled iron mine as the background,and analyzes the optimization of the ventilation system,the evaluation and decision of the optimization scheme,and the reliability analysis of the mine ventilation network system:(1)Design and analyze possible problems of the ventilation system based on the self-propelled iron ore,and make a feasible plan for the ventilation system.Based on the self-propelled iron ore development method,mining method,calculation of actual wind demand,and calculation of shaft section optimization,four feasible schemes that comply with the Safety Regulations for Metal and Non-Metal Mine and meet the actual needs of the mine were developed,using 3D Vent software Simulate and optimize the proposed scheme.(2)Use the evaluation and decision-making method to analyze and formulate the optimization plan of the ventilation system,and select the best plan.According to the four feasible schemes proposed,according to the characteristics of the mine ventilation system,a comprehensive evaluation index system of the ventilation system is established,and the improved area gray correlation decision model IAGRD-OCW decision model weighted by the moment estimation is used to optimize the plan and obtain the best The plan is plan three.(3)Aiming at the ventilation network parameters of Option 3,the reliability analysis of the ventilation network is performed.Based on the combination of network flow theory and the minimum path set disjointness and principle,Matlab data processing was used to calculate the reliability of the scheme three ventilation network system.The reliability of the scheme three ventilation network system was calculated to be 0.965.(4)Aiming at the characteristics of the mine ventilation system,using a bucket inclined shaft and a 1430 m mid-section electromechanical chamber as a possible place for a sudden fire,use 3D Vent software to simulate and analyze the path of mine fire pollutants such as toxic and harmful gases,smoke particles,etc.Impact of underground fires on workers in three locations.Combined with the reliability analysis of the ventilation network system,the reliability of the ventilation network system is 0 when there is a sudden fire in the inclined bucket shaft;when the emergency fire in the middle section of the 1430 m mechanical and electrical chamber is not spread to other roadways,The reliability is 0.655.When it spreads to other roadways,the reliability of the ventilation network system is 0.Through the above analysis,preventive measures are proposed for the mine.