Abstract:

In order to reduce the incidence of man-made accidents, combined with the theory of behaviour science and the constraint principle of mechanical movement degree of freedom, the concept of human behaviour risk degree of freedom was put forward and the safety constraint model of risk degree of freedom was established. The core of this model was to randomly constrain human risk degree of freedom with appropriate safety constraint elements and safety constraint mechanism, so that human risky behaviors were subject to the whole process and all-round safety restrictions, safety vigilance and safety reminders, so as to eliminate human random safety risks and avoid human accidents. Taking the operators and managers of coal mine enterprises as an example, based on the theory of work safety layer, a dynamic risk constraint mechanism with time and space as the protection layer was constructed, and a safety constraint guarantee system and measures were established to ensure its effective implementation. The results show that in the production, operation and management activities of coal mine, the use of customized safety constraint elements with random safety constraint function, and the implementation of positioning, timing and quantitavie dynamic constraints on the risk freedom of coal mine personnel can make people's risk behaviors subject to the whole process and all-around safety restriction, safety vigilance and safety reminder, so as to prevent people's unsafe behavior and management defects in a timely, random and advanced manner, and effectively avoid human accidents.

Key words: risk freedom, security constraints, work safety, unsafe behavior, constraint element customization