Abstract:For the study of the relationship between the dynamic phenomena in mines such as mine earthquakes,outburst and faults slide,extraction depth,firstly,double shear friction experiments of sandstone have been carried out so as to achieve its slide criterion in engineering aspects. Secondly,in order to study the stability of underground rock and zone of tectonic stress field,based on the analysis of distribution characteristics of initial rock stress measurements,the geology structural model is built according to the feature of underground rock,and tectonic stress field is obtained by back-analysis using finite element method. The calculating results agree well with the analysis result of earthquakes mechanism and the distribution characteristics of the measurements. The high stress regional centers locating at discontinuous zone of I level faults are corresponding to underground earthquakes scene. The study shows that existence of tectonic stress is the major origin and necessary condition of mine earthquakes. The instability sliding of the faults is the main manifest and the mining activity is the leading factor. Beipiao fault has dominated effects on other sub faults and tectonic stress areas and is dynamical fountain of dynamic phenomena in the Beipiao Mines.