Study On Evaluation Of Coal Spontaneous Combustion Risk

As the main factor of mine fire,coal spontaneous combustion is treated seriously for fire extinguishing in mine. Prevention for coal spontaneous combustion mainly includes danger evaluation, forecast and prevention of spontaneous combustion. Evaluation danger of spontaneous combustion can evaluate the level of danger for spontaneous combustion and then provide scientific foundation before fire occurs.Through analysis for danger influence factor in coal mine,composite dangerous fuzzy evaluation model of goaf coal spontaneous combustion is created,based on theory of fuzzy mathematics and characteristics of coal spontaneous combustion. In this model, four logical partitioning methods is utilized firstly to create membership function evaluation and then reduce the calculation via portrait of membership for dangerous influence factor. For evaluation index weights, analytical hierarchy process is used to simplify evaluation process. For evaluate result, weighted sum is used, as well as the principle of maximum membership degree and Score method to evaluate degree of danger and then improve the Reliability for evaluation result.. At the same time, danger evaluation of goaf coal spontaneous combustion in single factor is performed either. Based on result and fire prevention and control technique of different factors, it is analyzed using analytical hierarchy process. The most Effective fire prevention is got and then makes fire prevention more scientific.According to research method of combination of theory, experiment and practice, Danger degree of goaf coal spontaneous combustion for liuzhuang coal mine 121301 is assessed and proposal is given for fire prevention in accordance of evaluation result. This model can be achieve by Visual Basic 6.0 and database technology and can transplanted easily. Danger degree of coal spontaneous combustion in goaf can be got if scene data is input by operator. Data can be saved and printed and then reduce dramatically the job.