Affecting factors of safety management capability about coal mine based on structural equation model

Structural equation model (SEM) was established to discuss the interaction between affecting factors of safety management capability (FSMC) about coal mine based on data acquired from questionnaire of at coal miner. The model was constructed with 20 factors extracted from questionnaire, which was classified into four layers: Worker, team, firm and environment. The factors of worker layer were taken as endogenous latent variable of the model, the factors of team layer, firm layer, environment layer were taken as exogenous latent variable of the model. According to the modification indices acquired from the model, as well as the corresponding criterion, the model was modified through six steps: Modifying factor loadings λ_y and λ_x, modifying parameters β and γ, testing covariance of exogenous latent variable PSI, testing covariance of endogenous latent variable PHI. The results show that the factors of "team safety construction" and "recognition of leading group" need to be paid more attention to; the factors of "setting of safety management departments" and "laws, regulations and policies" need to be improved further; the factors of "working responsibility" and "psychological quality" are more sensitive.