Abstract: In order to study the spatial distribution rules and preventive measures of gas and coal spontaneous coupled hazard in goaf of mechanized caving face,this paper studied the coupling area reconstruction technology and analyzed the cause and judgment method of coupling based on the cause of explosive and coal spontaneous combustion and gas in the hazardous area. Based on the measurement and analysis of gas concentration and the influence of other flamma- ble gases on CH4 explosion,this paper calculated the ranges of different level coupling areas at the experiment face,re- constructed the distribution of coupling disaster area by three-dimensional reconstruction and spatial interpolation tech- nology,and the parameters of disaster space were extracted. Finally,the high drilling methane drainage,injection-cor- ner fire prevention materials technology were improved to meet the needs of coupling disaster prevention.