Study On Safety Risk Assessment And Control Of Chengjiao Coal Mine

Coal as the main energy source in China,has always been the ballast stone for the safe and stable supply of energy.In recent years,although the situation of coal mine safety production has been improved steadily,disasters and accidents still occurred sometime.Especially as the depth of mining increases,disaster risks continue to increase.How to ensure the safe and efficient production of coal mines is still the top priority of the coal industry.Safety risk assessment of coal mines and determining risk factors and hidden dangers of coal mines are the key factors for improving coal mine safety management and ensuring safe production,which have great practical significance for coal mine production.In this thesis,according to the actual needs of Chengjiao coal mine,geology and actual conditions of excavation engineering were analyzed to identify its hazard sources.Then,analytic hierarchy process and fuzzy comprehensive evaluation method were used to determine risk evaluation indicators and systems.A safety risk assessment model was established and mine safety risk evaluation was conducted.Finally,specific risk control measures were put forward.The main research achievements of this thesis are as follows:(1)In view of the actual geology,mining and excavation conditions of the Chengjiao coal mine,the coal mine hazard sources were identified and the hazard analysis was carried out.Six level I indicators were selected as the criterion level and37 level II indicators were selected as the plan level.Following the principles of the relevant index system,the mine safety risk evaluation index and system suitable for the Chengjiao coal mine have been determined.(2)The analytic hierarchy process was used to calculate the weight value of each evaluation index and the total ranking of each level II index.based on the fuzzy comprehensive evaluation method and the analytic hierarchy process,a safety risk assessment model of Chengjiao coal mine was constructed.The model was used to evaluate the safety risk situation,and the risk level of Chengjiao coal mines was medium,and the overall safety level was relatively safe,but improvement measures needed to be formulated to reduce risks.(3)Based on the results of the safety risk evaluation of the coal mines in the suburbs of the city,practical and feasible control countermeasures were proposed for the six I-level risk factors that have been identified that affect mine safety,which provided a basis and strategy for mine safety management.This thesis includes 13 figures,23 tables and 65 references.