## 3 Results
### Structural Equation Model
AC--Anthropometric characteristics of a mining machine operator:  
HO--Height of the operator in cm;  
AR--Age of the respondent in years;  
WE--Working experience of the respondent in years. EO--Ergonomic features of the operator system and workplace:  
Q7 Assessment of absenteeism due to poor working conditions;  
Q8 Evaluation of the negative impact of exhaust gases on operators. RM1--Mining machine risk of the first group of causes of downtime (risk of abuse and electric and technical nature):  
IF--The impact factor of downtimes originating from inadequate management (misuse) of the mining machine;  
EF--The influence factor of electrical downtime on the mining machine. RM2--Risk of the mining machine of the second group of causes of downtime (risk of an organizational and technical nature):  
TF--The impact factor of technical downtime on the mining machine;  
OF--Impact factor of organizational downtime on the mining machine. SAC--Safety Awareness and Competencies:Q10 Assessment of awareness of safety and health responsibilities in the workplace;  
Q11 Evaluation of the comprehensibility of rules on safety and health at the workplace;  
Q12 Evaluation of the effectiveness of solving health and safety problems in the workplace. SC--Safety Communication:  
Q13 Assessment of the supervisor's awareness of safe work practices;  
Q14 Assessment of communication with the supervisor about safety rules;  
Q15 Evaluation of the respondent's awareness of work safety in the company. RP--Rules and Procedures:  
Q16 Evaluation of the respondent's awareness of the safety and health policy at work in the company;  
Q17 Evaluation of the respondent's understanding of the occupational health and safety policy in the company;  
Q18 Assessment of the respondent's involvement in improving the occupational health and safety policy in the company. SP--Safety Policy:  
Q19 Respondents' assessment of the representation of the safest ways of working in occupational safety and health rules and procedures;  
Q20 Evaluation of respondents in the implementation of safety improvement in the shortest possible time;  
Q21 Respondent's assessment of the compliance of practices with occupational health and safety rules and procedures. SHW--Safety and health at work:  
EO--Ergonomic characteristics of the system, operator-workplace:  
The model adequacy indices are \(\chi^{2}=909.57\), df = 313, GFI = 9.898, AGFI = 0.826, NFI = 0.906, CFI = 0.908, TLI = 0.905, RMSEA = 0.066. The structural equation modelling method obtained the mathematical dependencies among the observed variables. Based on these, a contextual adaptive decision support system was designed, which carries out expertise and provides recommendations on risk mitigation measures. Reflective models can be estimated through Equation (1) [68], where the latent variable is assumed to underlie or cause its related causal indicators. Simple linear regression Formula (1) provides \(x_{i}\)--causal indicator, \(\pi_{i0}\)--constant intercept, \(\pi_{i}\)--item loading, \(\xi\)--latent variable, \(\varepsilon_{1}\)--measurement error, \(i=1,2,\ldots n\). \[ \begin{array}{l}x_{1}=\pi_{10}+\pi_{1}\xi+\varepsilon_{1}\\ x_{2}=\pi_{20}+\pi_{2}\xi+\varepsilon_{2}\\ x_{n}=\pi_{n0}+\pi_{n}\xi+\varepsilon_{n}\end{array}  \tag{1}\]  
\[ \begin{bmatrix}HO\\ AR\\ WE\\ Q3\\ Q2\\ Q4\\ Q6\\ Q5\\ Q7\\ Q8\end{bmatrix} = \begin{bmatrix}-0.65&0&0&0\\ 0.96&0&0&0\\ 0.94&0&0&0\\ 0&0.72&0&0\\ 0&0.91&0&0\\ 0&0.79&0&0\\ 0&0&0.50&0\\ 0&0&0.79&0\\ 0&0&0.88&0\\ 0&0&0&0.63\\ 0&0&0&0.94\end{bmatrix} \cdot \begin{bmatrix}AC\\ ES\\ EC\\ EE\end{bmatrix} + \begin{bmatrix}22.366\\ 7.595\\ 10.374\\ 1.048\\ 0.504\\ 1.056\\ 1.792\\ 0.350\\ 0.239\\ 1.636\\ 0.326\end{bmatrix}  \tag{2}\]\[ \begin{bmatrix}Q10\\ Q11\\ Q12\\ Q13\\ Q14\\ Q15\\ Q19\\ Q20\\ Q21\\ Q21\\ Q16\\ Q17\\ Q18\end{bmatrix} = \begin{bmatrix}0.89&0&0&0\\ 0.74&0&0&0\\ 0.69&0&0&0\\ 0&0.56&0&0\\ 0&0.77&0&0\\ 0&0.68&0&0\\ 0&0.53&0\\ 0&0.80&0\\ 0&0.77&0\\ 0&0&0.74\\ 0&0&0&0.73\\ 0&0&0&0.74\end{bmatrix} \cdot