The regional forecast of the coal mine structure based on the paleotectonic stress field

The paper collected and synthesized the regional geological outline information of the North China Plain,and analyzed the paleotectonic stress field of Xiandewang Coal Mine area in Xingtai,determined the effects on the mine structure produced by the previous tectonic movement.Based on the evolution of tectonic stress,combined with rock mechanics,elastic-plastic mechanics and fracture mechanics to proceeded the numerical calculation,established a three-dimensional digital geological structure model of the mine.Through theoretical analysis,numerical simulation and field experiments,predicted the small structures distribution area and the distribution law of the mine field,got the mine fault distribution area map.Not only the research results can provide the optimal mining design solution for the mining area and no mining area,but also help for the gas geology distribution and the Ordovician limestone water occurrence.