Study On Spontaneous Combustion "Three-Zone" Division In The Goaf Of No.1282(3) Longwall In Ding Ji Mine

Spontaneous combustion of coal is a serious impediment to China’s coal mine safety production, up to tens of billions of direct or indirect loss caused to our country. To our country as one of the major disaster in China’s coal industry of coal spontaneous combustion, not only economic losses, and destroyed our reputation in the world within the eyes of the people to the people1f our country and the world as a whole has left an indelible shadow the negative impact is self-evident.Times and social leap forward to promote the mechanization of production has become an irresistible trend. Widely implemented in our mechanized mining,significantly improve the coal recovery rate, taking into account the variability of the geological conditions of the coal mine, the conditions are rip,the coal spontaneous combustion will occur in the goaf of fully mechanized mining face region.In oeder to improve mine safety, increase mine productivity,on the one hand,to ensure that the recovery rate of the coal mine and mining speed,on the other handresearch and analytical grasp of the law of fully mechanized mining face goaf spontaneous combustion of coal.The workface, which is under the1282(3) workface has been completed, the1412(1) workface isexpioited now. The mechanized mining and surface mining grew up, to the length of the long lead goaf larger, resulting in goaf region left behind a large number of floating coal. Residual Coal Spontaneous Combustion will trigger when the mined zone of residual coal in oxygen of air leakage and heat storage conditions, endangering the face of normal recovery, and even burning equipment, the loss of a lot of coal, lead underground fires and gas explosions, endangeringthe underground staff of personal safety.Therefore, in1282(3) workface, the legacy of the goaf spontaneous combustion of coal in the study to determine the goaf of "Three Zone" with a range of important significance.Study how to prevent spontaneous combustion of coal this problem, we must first do tow to prepare. First, the depth of understanding of the mechanism of spontaneous combustion of coal, accurately grasp the oxidation of coal in a low-temperature environment law.Single method can not meet the analysis of complex problems.This comprehensive research method is a powerful weapon to solve complex problems.Theoretical research and play o role in supporting the research problem; Laboratory experiment data analysis is to assist,to verify the feasibility of the theory; Field test data sources with powerful persuasive.Oxyged exothermic coal oxidation in a low temperature environment as a starting point, the oxygen intake,weight loss, heat flow as the main parameters of coal low temperature oxidation; Coal sample particle size as variables, the comparative anaysis of coal oxygen the extent of the relationship between the amount of geat release by the particle size;Small mining collector13-1regularity of the low-temperature oxidation of coal, combined with thermodynamics and heat theory to establish the mathematical model of the low-temperature oxidation of coal, as relying on fraw most of the coal self-ignition, shorter ignition period;According to the actual conditions of the small set mine1282(3) face,the next crossheading embedded beam tube temperature measurement system device time every day to go down, collecting various measurement points corresponding to the goaf gas region and measuring the temperature of the corresponding point in the laboratory analysis of the concentration of each gas component, and the resulting data fitting process, come to the relationship with the depth of the gas concentrantion and temperature of the measuring points, summed the goaf with distribution law. Shortest according to the width of the heat with coal spontaneous combustion in the period, you can determine the speed of the work of advancing an extreme (the face of the advancing speed can not be less than this value, otherwise it will pccur spontaneous cpmbustion of coal), which is forecasting Dingji coal Mine1282(3) goaf spontaneous combustion of coal provides a strong theoretical and practical basis.