Study On Risk Assessment And Emergency Evacuation System Of Mine Exogenous Fire

Mineral energy is an important pillar of China’s national economy and a fundamental driving force in ensuring the stable development of society.How to ensure the safe production of mining enterprises in China has become an important issue affecting the sustainable development of the economy.In all kinds of coal production disasters,mine external fires is characterized by sudden and severe destruction,and often accompanied by huge casualties.Therefore,controlling the risk of fire during production and improving the emergency management capability of mining enterprises has become a top priority for safety production.Based on a mine in shandong province,this paper explores the exogenous fire risk assessment method,carries out research on the fire smoke flow spread pattern and evacuation path planning on the basis of the evaluation results,and develops and integrates them into computer system with a view to improving mine safety production in all aspects.(1)Based on the analysis of typical cases of external fire accidents over the past years,an index system for evaluating the risk of external fires in mines was constructed according to the four hazardous sources: humanmachine-environment-management,which including 19 index factors.The improved rank correlation analysis method was used to determine the weights of each evaluation index,and a new grey evaluation method based on reformative enter-point triangular whitenization weight function was introduced to establish a mine exogenous fire class evaluation model.The model was used to evaluate the risk of the example mine,and the evaluation results were consistent with the actual investigation,indicating that the proposed method has practical application value.(2)The real fire source and typical alleyway scenarios were selected,and the Pyrosim software was used to conduct numerical simulation of the fire area,so as to explore the law of smoke flow spreading in exogenous fire accidents and the impact of fire products on people downwind.The results show that visibility plays a dominant role in the process of escape.(3)The passable safety factor was designed according to the impact of high temperature,poisonous gas and smoke on the evacuees during the fire period,and the concept of the passage difficulty factor was then adopted to construct a system of equivalent length of the passage.And a mine emergency evacuation path planning model was established,the equivalent length was used to replace the geometric path.The model was solved by the adaptive ant colony optimisation algorithm.Besides,the effectiveness of the algorithm is verified by an example.(4)The risk assessment method and evacuation path solution were compiled into a computer program.The mine fire emergency management information system with five functions including system design,risk management,emergency treatment,simulation drill,training and education is realized through the mixed programming of Visual Basic6.0 and Matlab.