Technology and method of coal and gas outburst prediction during coal geological exploration

During coal resource exploration, structural deformed coal can be distinguished using geophysical well logging, and also can be predicted through the analysis of thickness of coal seam and its variations, and through the analysis of lithology, thickness and mechanics property of the roof and the floor of the coal seam and their variations. In-situ stress state and extent of deformation of the coal seam can be obtained from analysis of geological structure, structure curvature of the floor contour map of coal seam, and stress numerical simulation. In addition, we can obtain the measured gas content and pressure of coal seam directly from measures, and indirectly from the prediction means of gradient of gas content and pressure of the coal seam, explanation of geophysical data. Based on the coupling analysis of gas content, coal mechanical properties and stress state, we put forward technology and method to prediction of outburst zone of coal and gas.