Study On The Optimization Of The Large-scale Complex Mine Ventilation System

The mine ventilation is a very important segment in production of mine enterprises, andthe quality of mine ventilation is directly related to safety production and economic benefit ofthe mine. With the continuous expansion of the mine expansion and exploitation extends tothe depths, the mine ventilation network continues to complicate followed by a more difficultmine ventilation and ventilation problems emerging, which impact on the health of workersand the underground mine production.This paper is a study of the ventilation system of a large tin mine in Guangxi based oncollecting and studying about a large number of relevant system optimization andtransformation of ventilation on literature information. And the paper used field survey andevaluation methods to analy the reason which are multi-task in the middle and layered,multi-operating point and dispersed, civilian mining workings, mora caving roadway area andscrap lead to merry disorder within the mine, a large amount of air leakage, insufficient airflow, low effective air flow, air distribution panel unequal, and seriously affected the mineproduction safety. Therefore, the thesis apply merry flow theory, three-dimensional simulationof mine ventilation system software for the actual existence of the mine problem, the mainresearch contents as follows: The commonality of large complex mine ventilation systemwere analyze and summarize. These contents are: mine ventilation network measurement andsurvey content, mine ventilation common problems, ventilation network control technology;The adjustment optimization method was determined to investigate the status of the mineventilation system. And the characteristics of the system volume, working face wind quality,fan performance parameters, natural wind pressure and wind flow were analyzed;Underground mid work surface required air volume were calculate and analyze to determinethe total mine into the wind and mid air distribution; The models of mine ventilation networkdigitization, database and network solver were established; Some mine ventilation systemoptimization program were developed and the best optimal scheme was chosen fromoptimization plans, according to the network solver, analysis the technical and economic andused the mutation theory optimization method; Technical feasibility of the key measures tofinalize the program wsa analyzed, such as the selection and installion of an air curtain,location and effects of windscreens.According to the final solution construction, finally through on-site verification, the mine ventilation effect is improved. Research result indicate that application of three-dimensionalsimulation of mine ventilation system software and catastrophe theory could optimize theoptimal mine ventilation system; application mine air curtain technology can effectivelyachieve reasonable airflow regulation, the middle of the air volume meet all the designrequirements; adjusting windscreen applications can effectively controled the amount ofmid-air return.Main innovations are as follows: Innovative application of three-dimensional simulationof mine ventilation system software and catastrophe theory solved the optimization problemof ventilation systems; Application of mine air curtain solved the problem of irrational airdistribution.