Study On Coal Spontaneous Combustion Risk Evaluation In Goaf Of Fully Mechanized Workface

Spontaneous combustion is one of the main natural disasters in coal mine, most of the spontaneous combustion occurred in the mined-out area. It can make an evaluation to the spontaneous combustion risk before coal spontaneous combustion fire occurred. And according to the evaluation results and the intermediate results, take fire-fighting measures with special focus and aims, to reduce or eliminate the danger of the spontaneous combustion in the mined-out area. It can provide scientific and reliable basis for work of control coal spontaneous combustion fire.This article according to the internal and external influence of coal spontaneous combustion in goaf, the risk evaluation index of spontaneous combustion are selected, and fuzzy comprehensive evaluation index system is established for spontaneous combustion in goaf. The weight coefficient of the risk assessment indicators of the spontaneous combustion in goaf is determined with analytic hierarchy process. The degree of membership of the risk assessment indicators of the spontaneous combustion in goaf is determined with expert evaluation method. Based on fuzzy comprehensive evaluation theory, the goaf spontaneous combustion risk fuzzy comprehensive evaluation model is established, and based on the rating method to determine the spontaneous combustion risk level.According to the goaf spontaneous combustion risk fuzzy comprehensive evaluation model, the software is developed for goaf spontaneous combustion risk evaluation with computer aided software VB and Excel. And automate the evaluation process, improve the efficiency of the evaluation work.Finally, in combination with actual geological conditions of the10414working face of a coal mine, using the evaluation software to evaluate the working face goaf. And according to the evaluation results, the corresponding prevention and control counter-measures for goaf spontaneous combustion are put forward.