Study On The Coal And Gas Outburst Mechanism And Warning Of Close Coal Seams

For close coal seams of coal and gas outburst mechanism and warning technology problems,By studying theoretical analysis of surrounding rock in coal seam group mining and it’s effectson the coal and gas outburst, Combined with the study of coal and gas outburst main factors ofGuizhou typical coal mine,Using the theory of strata movement, internal and external stress fieldtheory, statistical analysis theory and the basic theory of early warning,etc. By means ofnumerical simulation, the experiments of physical and mechanical properties of coal also thescientific means such as analog simulation experiment, In the process of close coal seams miningcharacteristics of surrounding rock stress and pressure relief gas migration rule were deeplystudied, and by analysis of the main factors of coal and gas outburst of Guizhou typical coalmine, Proposed the concept of prominent field, and discussed onthe mechanics mechanism ofcoal and gas outburst. On the basis ofanalysising microseismic monitoring coal strata movement,fissures, finished the microseismic mornitoring of whole process experiment of coal and gasoutburst, obtained the characteristics of microseismic response, proposed the index indicationand critical value of outburst.Build the microseismic monitoring system of coal and gas outburstin coal mine, can well reflect seismic events before and after blasting tunneling faces severalcharacteristics, for outburst warning application to provide theoretical and technical support.