Experimental Research On The DongRong Coal Of Spontaneous Combustion And Application

The spontaneous combustion of coal seam is one of the major calamities in safe production of coal mine. The main factors of occurrence and development of coal self-ignition is the quantity of heat that is produced by coal spontaneously. Therefore, studying the coal exothermic property is the precondition of mastering the process of coal self-ignition, searching the law for it and developing coal seam fire prediction. In this paper, the research of several characteristic parameters of DongRong coal spontaneous combustion is the precondition of coal seam fire prediction and disposal. Characteristic parameters of coal spontaneous combustion were researched to a certain extent by the methods of theoretical analysis, experiment simulation. Therefore the research provides theoretics for coal exothermic property in factual condition. Characteristic parameters of coal spontaneous combustion were qualitatively studied and quantitatively determined by coal self-ignition experiment from two aspects:coal oxidation and exothermic which is produced by oxidation. Then influencing function between factual exothermicity of coal seam and limited exothermicity of coal seam in the condition of that coal temperature is not exceeded critical temperature of coal spontaneous combustion is put forward. As to the period of coal temperature exceeded critical temperature, the relations between factual exothermicity of coal seam and limited exothermicity of coal seam were analyzed by gray relevancy analysis of gray system. From these theories, numerical simulation in this stage is feasible and it is the basis of programmed heat test mechanism to simulate spontaneous combustion experiment oven of coal. According to the DongRong nature characteristics of coal seam . Reaching and developing a new Fire-fighting gel material, it has the well function to reduce the heat to block up the leak,and stay at the part of the ignition for a long-term ,also it can make the temperature of the coal lowe down very fast; And have the certain strength, leaking little to face;Still has thecharecteristics of dehydrate slow-moving, the quality of being permanen etc. Fire-fighting gel materials was successful used to extinguishing fire at the DongRong coal mine.