Differences and connections between mining seismicity and coal bursts in coal mines and preliminary study on coal bursts induced by mining seismicity

Mining seismicity and coal bursts are key problems in safe and stable coal mining. It is an important prereq⁃ uisite for further studying the dynamic disasters of coal mines to clearly understand the mining seismicity and the coal burst. In order to overcome the fuzzy concept of mining seismicity and coal bursts，clarify the differences and connec⁃ tions between mining seismicity and coal bursts and obtain the true characteristics of mining seismicity，the definition and the characteristics of the mining seismicity are first proposed. The mining seismicity is classified based on the bas⁃ ic rupture forms of rock mass. Differences between mining seismicity and coal bursts are systematically explained in terms of the location of the rock fracture，the correspondence relationship between energy release and dynamic process，the main characteristic of dynamic processes，the subordination，and the prevention goals. The influence of seismic wave disturbances and the changes in surrounding rock structures caused by mining seismicity on coal bursts is explained. The theoretical basis of the coal bursts induced by mining seismicity is illustrated based on the strain rate of disturbances. Meanwhile，the distribution characteristics of disturbance displacement fields of tensile mining seismic⁃ ity and shear mining seismicity are investigated，and the relationship between the disturbance displacement of mining seismicity and coal bursts is analyzed. The research results show that vibratility is the main feature of mining seismici⁃ ty，which is the primary difference from coal bursts. A static or dynamic disturbance on the surrounding rock caused by mining seismicity can cause coal bursts. The coal bursts induced by the static loading should be analyzed based on the superposition principle，and the coal bursts induced by the dynamic loading should be analyzed based on the engineering disturbance rock dynamics and the theory of coupled static⁃dynamic loading. A good correlation between the direction and the intensity of disturbances and the spatial orientation of surrounding rocks is observed.