Surrounding Rock Stability Analysis And Control Technology Research Of Roadway Across Under The Light Coal Face

With the increasing depletion of coal resources and increasing the depth of the underground mining, affected by mining under pressure across the mining roadway control problems have become increasingly prominent. As the Mining face,situ stress state of equilibrium is destroyed, causing stress redistribution, stress concentration in the coal mining space surrounding rock, and the pressure is transmitted to the coal seam floor strata, the deterioration of Mining roadway stability across the bottom face caused serious damage to surrounding rock deformation.In this paper, Combined the project background of Xiaotun mine-300 North Lane, theoretical analysis, numerical simulation and field measurement and other research tools to light up under the face across roadway stability and control technology Systematic study, analysis of the surrounding rock stress distribution across the mining roadway and deformation under the influence of mining, Cross-stress and deformation of surrounding rock mining with the influence of changes in the upper part of the vertical distance mining coal face and cross the roadway between, with increasing vertical distance showed a decreasing trend after the first increases, and face the impact of mining on the vertical stress influence on the level of stress is greater than the roadway; With the increasing displacement of roadway vertical distance gradually decreases stress concentration area roadway gradually expanded from the shallow to the deep, indicating that with increasing vertical distance, the effect of mining on the face beneath the surrounding rock stability across the mining roadway smaller; The vertical distance from the top of the tunnel face, the bigger the subject of mining influence, the worse the stability of the roadway, the more serious the situation surrounding rock deformation. For theoretical research results and the actual situation presents different technical solutions supporting, Finalize "grouting combined with high preload, high-strength steel mesh and anchor combined support" rock control technology solutions through comparative analysis. The field of industrial test verification, effective control of surrounding rock deformation dynamic pressure across the mining roadway,ensure mine safety production, To light face down across the roadway controlled mining technology has accumulated valuable experience.