Research on Coupling Evolution Process and Early Warning Indicators of Thermodynamic Disasters in Goaf
The goaf is a key area where coal spontaneous combustion and gas disasters coupling coexistence.In response to the problem of difficult to achieve accurate identification of the risk of composite thermodynamic disasters in goaf using conventional early warning methods based on static critical indicators such as gas,temperature and others in the stope,through self-constructing a multi-sensor coupling detection experimental platform for precursor information of thermodynamic disasters in goaf,the entire process of coal spontaneous combustion induces gas explosion in goaf is simulated,multiple field information during the coupling evolution process of thermodynamic disasters in goaf is obtained,and the change laws in temperature field,oxygen concentration field,methane concentration field,and pressure field are studied.According to experimental results and theoretical analysis,a disaster coupled evolution grading early warning indicator system based on goaf air leakage rate and working face pressure difference is constructed,providing theoretical support for intelligent early warning of coal mine thermodynamic disasters.
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