Discussion on generalized “Three Factors” mechanism of coal mine dynamic disaster

At present,the mechanism research of coal mine dynamic disaster is mostly based on a single factor,and the conclusions obtained are relatively independent,which makes the research of dynamic disaster more complicated. In order to return to the essence of massive accumulation and violent release of elastic properties,and enhance the relevance of related research,this paper puts forward the basic logic of coal mine dynamic disaster formation through common sense reasoning,taking elastic energy accumulation as the clue,including:continuous energy source supply; medium property to ensure that energy form is elastic performance; restriction mechanism that can make the elastic energy accumulate to the disaster level and fail. It is pointed out that“energy source”includes two forms:stable and accidental. The former comes from equivalent loading after mining unloading,and the latter from dynamic load disturbance; in a narrow sense,“medium property” refers to the type of material,but the impact propensity,permeability and other properties restricted by the micro structure are also included in this concept; the restriction mechanism is the key to the accumulation of elastic energy to the disaster level and the violent release of elastic energy,taking the combination of structural plane and medium as the specific form,which is the entry point to achieve human intervention in disaster prevention. They are summarized as“force source factor”,“physical factor”and“structural factor”. Among them,physical factor is the basis of all behaviors,and force source factor and structural factor have close interaction. Based on this,the generalized “Three Factor”mechanism was proposed,and its potential application scenarios and future research directions were given.