Research On Operation Effect Evaluation Of Dual Prevention Mechanism For Coal Mine Safety Based On Matter-Element Extension

In the process of national economic development,coal as the most widely used energy plays a vital role.However,due to the fact that the coal mining industry is a "three high industry" with high labor intensity,high operational risk,and high frequency of accidents,major accidents in coal mines occur from time to time,reflecting the ongoing safety issues of "unclear,unexpected,and poorly managed".In order to curb the occurrence of major accidents,coal mine enterprises actively promote the construction of safety dual prevention mechanism.At present,there are few evaluations of the operation effect of safety dual prevention mechanism,and the problems in the coal mine safety production process have not been identified in a timely manner.Therefore,this thesis constructs an evaluation index system for the operation effect of dual prevention mechanism for coal mine safety.Based on the actual situation of coal mine enterprises,the combination weight of evaluation indicators is determined by combining Analytic Hierarchy Process and Entropy Weight Method.The operation effect of dual prevention mechanism is evaluated based on the Matter-element Extension Model.According to the evaluation results,countermeasures and suggestions are put forward for coal mine enterprises to effectively improve the operation effect of dual prevention mechanism for safety in coal mining enterprises.Firstly,the connotation of dual prevention mechanism for coal mine safety is summarized,and it is explained that dual prevention mechanism for coal mine safety has four basic principles: risk priority,systematicity,full participation and continuous improvement.Dual prevention mechanism of coal mine safety is compared with the safety production standardized management system and the occupational health and safety management system.Their similarities and differences are sorted out.The development philosophy and operation mode of these three management systems are basically the same,and different management systems can be combined.But there are also differences: different mandatory requirements,different management objects and concerns,different constituent elements,and different risk levels.Analyzing the construction and implementation of dual prevention mechanism for coal mine safety,it is found that there are problems such as insufficient integration with the existing safety management system,incomplete risk identification,inadequate risk control,and low level of information management.Secondly,according to the operation characteristics of dual prevention mechanism for coal mine safety,the case study method is used to statistically analyze 69 major coal mine safety accidents and above from 2018 to 2022.It is found that water accidents,coal and gas outburst accidents,and roof accidents occurred more frequently.Based on the accident investigation report,the accident causes of 69 accidents are analyzed to extract the influencing factors that led to the accidents.Combined with the literature analysis method and the implementation standard of dual prevention mechanism for coal mine safety(DB14/T 2248-2020),the influencing factors are summarized,resulting in a preliminary evaluation index system consisting of 5 primary indicators and 32 secondary indicators.The questionnaire is designed according to the preliminary indicator evaluation system.The reliability test is carried out on the questionnaire results,the unqualified indicators are removed,and then the validity test is carried out.Using exploratory factor analysis to evaluate the correctness of five dimensions,and ultimately constructing a coal mine safety dual prevention mechanism operation effect evaluation index system,including risk grading control,hidden danger investigation and governance,inspection and review and update,employee safety management,and security management.There are 5 primary indicators and 30 secondary indicators.Thirdly,the combination weighting method is used to determine the combined weights of the evaluation indicators of the operation effect of dual prevention mechanism for coal mine safety.The index weight is determined by using Analytic Hierarchy Process and expert scoring.The operation status of dual prevention mechanism in Y coal mine is assessed and scored based on the matter-element extension evaluation level.The entropy weight method is used to determine the indicator weights.The two methods are combined to calculate the weights of various levels of indicators.The combined weights of first-level indicators such as risk hierarchical control,hidden danger screening and management,inspection and review and update,employee safety management and security management are 0.3641,0.2714,0.0773,0.1618 and 0.1254,respectively.Finally,by comparing common evaluation methods,the advantages of the matterelement extension method are proposed.The operation effect of dual prevention mechanism for coal mine safety is evaluated based on the matter-element extension model.The evaluation of the operation effect of dual prevention mechanism for coal mine safety is taken as the evaluation matter element,divided into 5 evaluation levels:unqualified,qualified,medium,good,and excellent.According to the correlation function and combination weight,the correlation degree of indicators is calculated.The operation effect of Y coal mine safety dual prevention mechanism is determined to be "good",and corresponding countermeasures and suggestions are proposed for indicators with poor evaluation results such as risk monitoring and tracking,hidden danger acceptance,inspection and correction,operational standardization,and emergency management,so that the dual prevention mechanism for coal mine safety can be carried out more effectively.There are 16 figures,34 tables and 94 references in this thesis.