Numerical Simulation Reaseach on Stress Field Distribution of Coal Bed Fault Structure Formation and Evolution

Abstract

AbstractUsing finite element numerical simulation software, ADINA, the formation of a fault structures under the action of tectonic stress was simulated. With the formation of coal-bed fault under a modern tectonic stress field, the destruction conditions of coal and the distribution of stress were simulated. Simulation results show that a tectonic fault structures under the action of the formation of coal seam, in the footwall near the fault plane of the seam and near the bottom of the fault plane of the plate at the top, coal vulnerable to damage; fault structure after the formation of lead in different Direct stress and horizontal stress combinations, are in reverse fault footwall fault plane exist in the vicinity of stress concentration phenomena, reverse fault stress field in the direction of maximum stress from the direction of the main decisions, and normal faults only in the level of stress and vertical stress closer, the stress field in the direction of the major decisions by the vertical stress. Conclusion of the study for the coal and gas outburst prevention and control has important theoretical guidance.KeywordsfaultTectonic evolutionnumerical simulationgas outburst