Study On The Numerical Simulation Of Liquid?CO₂ Injection Technology For Rapid Extinguish Coalfield Outcrop Fire

Coalfield fire is a global disaster,a serious threat to human health,the natural environment and the coal mine safety production,cause huge loss of resources and environmental pollution.Coalfield fire area of governance is a long process,thus realizing the coalfield fire area quickly permanently extinguished has important practical significance.Take the Taileweiqiuke coalfield fire as an example,introduce the fire combustion situation,proceed from two aspects of the causes of spontaneous combustion mechanism of coal and coal field fire was used to study and analyze the mechanism of coal seam coal fire burning,and according to the characteristics and influencing factors of the coal fields of fire,and puts forward the treatment measures for the;of several commonly used methods and materials for prevention and control of coal fires were compared and analyzed,selected liquid CO2 as the realization of the coalfield fire area rapid fire extinguishing materials,and the use of numerical simulation analysis of liquid CO2 fire extinguishing cooling effect.The analysis results show that the effect of fire fighting is related to the flow rate and time.The longer the traffic flow is,the faster the cooling rate is,the more convenient the comprehensive economy and the construction principle,and the 4t/h is the best injection flow.And according to the analysis results,combined with the fire extinguishing conditions put forward "fire block,rapid fire extinguishing project governance".