Combustion of coal is an objective phenomenon common on Earth, this is a kind ofnatural disasters, small underground mine surrounding the new mine which is not establishedis using room and pillar mining process, a large number of coal pillars remained because ofthe low recovery rate, the roadway communicate with each other and the roof fallingcollapse, as well as coal seam shallow. Leading to the long-term exposure of coal seams withoxygen, many large fire area is result in the combustion, this has been constitute a greatthreat to the safety normal production of many opencast mine, especially the latter makes thefire area to spread to the seam hidden depth, and thus more difficult to govern. According tostatistics, more than95%coal seam combustion caused by small mines indiscriminatelymining. We need to solve this problem to guarantee the safe production of coal mine.Through the research of coal spontaneous combustion factor and the spontaneouscombustion of coal, use four methods of land cover, drilling and grouting method, strippingmethod and extinguishing method, if rocks relatively hard, the stripping method must besupplemented by blasting. Blasting itself is special and hazardous industry, especiallyoperating in the high-temperature region, the security issue is particularly prominent.In this paper, application security assessment method to the LIJIATA coal, Preliminaryhazard analysis to identify various hazardous factors induced accident, Identify eachdangerous and hazardous factors which lead to a security incident by the Preliminary HazardAnalysis, Establish fault tree of the fire area bursting Combine with preliminary hazardanalysis results, Find the minimal cut sets which lead the top event occurred, according to thesorting of structure importance, we can identify the basic events of most dangerous and takecountermeasures. Finally, the fuzzy comprehensive evaluation used in the fire area blastingsystem,analytic hierarchy process (AHP) to determine the various factors Weight value, andthen, an expert was evaluated the evaluation factors, Calculate membership degree by theevaluation unit. At last, the fuzzy comprehensive evaluation results were processed by scoreand obtained security level.This is applies safety assessment methods to evaluate the fire area blasting instance, Itachieved the desired purpose which is practical guidance and reference for future fire zoneblasting operations. |