A Multilevel Fuzzy Comprehensive Evaluation Of Coal Mine Fire Hazard

The mining industry, an important pillar industry, plays an important role in promoting sustainable and rapid national economic development. Underground mining environment, featured by its complexity, confined space, various fire hazards including coal dust and gas, is conducive to fire occurrence that is capable of damage infliction with severity worse than that experienced in other industries. The time and again happened coal mine fire accidents in recent years have caused serious personnel casualties and economic losses, arousing public concern from all walks of life with appallingly negative economic and social impact. It is of great importance to conduct coal mine fire hazard evaluation in a rational and scientific manner as it contributes to effective prevention and control of similar accidents. In this paper, a study concerning the accident causation theory based coal mine fire hazard evaluation was done via multi-level fuzzy comprehensive evaluation. Rationality of this method was testified through a case study. Presented below are the main contents and findings of this paper.An analysis concerning the merits and shortcomings of qualitative, semi-quantitative and quantitative fire hazard evaluation methods was done, based upon which a feasibility study of applying multi-level fuzzy comprehensive evaluation into coal mine fire hazard evaluation was done. In line with the specific condition of coal mining environment, the said method was selected to fulfill coal mine fire hazard evaluation.A summary of seven mainstream accidents causation theories as well as a thorough analysis of coal mine fire accidents in terms of type, feature, prevention and treatment were made, based on which the coal mine fire accident causation theory was proposed, which in return laid the foundation for causation modelling of coal mine fire accident.To quantify the coal mine fire accident evaluation, a coal mine fire hazard evaluative index system was built. The expert scoring method was then used to quantify the various indexes. To ensure the evaluative index system being solid and scientific, the analytical hierarchy process was used to weigh the indexes.After the establishment of a quantitative coal mine fire hazard evaluative index system, a model was then built for coal mine fire hazard evaluation. A matrix operator capable of considering all the information contained in the fuzzy evaluative vector was selected to ensure a trustworthy evaluation result. The classification parameter evaluative method was chosen for the process of the evaluative result. A scoring vector was then built to quantify the final evaluative result.The said coal mine fire hazard evaluation method was then put into application with a certain coal mine in Yunnan province being the subject. Cross-check between the evaluative result and the information commanded proved the method being practical, feasible and is capable of rational and objective evaluation. The multilevel fuzzy comprehensive evaluation method is thus worthy of promotion in coal mine fire hazard evaluation.