Preparation And Research On A New Type Of Compound Inhibitor For Coal Spontaneous Combustion

China's coal resources are very rich, mining and consumption is huge, and the phenomenon of spontaneous combustion of coal is very serious, which seriously affect the development of coal mine safety and coal mining industries. With modern advances in technology and national attention on mine safety, for the prevention of spontaneous combustion of coal fire disaster also means faster and better development. Wherein the use of Inhibitors of coal spontaneous combustion prevention technology is very affordable, and can achieve good results, this simple and efficient prevention and extinguishing technology, in many of the mines at home and abroad have been very good application, and it has made a more significant effect.The paper chose three common physical blocking agents and three chemical blocking agent, after adding a certain amount of water, are made with 20% blocking agent solution on the coal samples resistance processing, through passive plus effect of temperature study of inhibitors of coal sample spontaneous combustion characteristic parameters, in order to produce the amount of CO, oxygen consumption rate, characteristic temperature, the resistance ratio and coal heating rate of evaluation methods to evaluate the effect of blocking resistance of the agent. Optimized for Huangling coal mine No. 1 of the best effects of physical barrierblocking agent MgCl₂ and effect optimal chemical resistance agent CO?NH₂?₂, then these two single blocking agent were mixed ratio, composite blocking agent blocking effects at different concentrations and different proportions of the experimental results obtained, the higher the resistance of the composite solution concentration, the better the barrier effect. Through comprehensive analysis found that the concentration of the highest price of 20% of the composite Retarder. In composite barrier agent concentration of 20% of the premise, change the physical and chemical barrier blocking agents of ratio to yield MgCl₂ and CO?NH₂?₂mixing ratio of 1:3, the optimal barrier effect. Finally, infrared spectroscopy experiment analyzes the influence of inhibitors of complex coal molecule reactive functional group.Experiments show that: After blocking agents processing complex, with the blocking agent concentration, reduce the number of coal molecule reactive functional group of the more obvious; composite barrier agent concentration of 20%, with the chemical agent resistance the proportion rises to reduce the number of coal samples reactive functional group of the more obvious. This is further validated from the microscopic point of view on the complex blocking agent for coal has a dual inhibition of resistance, better able to inhibit the oxidation of coal, to prevent the occurrence of spontaneous combustion of coal.In this paper, both macro and micro, explore the exothermic oxidation process of coal can be suppressed efficiently blocking agent for further study retarder complex provides a new way of thinking. The results of blocking agent to prevent coal spontaneous combustion has important practical significance.