Research on the Influence of Mining Speed on the Stability of Surrounding Rock in Deep Thick and Hard Roof Working Face
In order to further explore the influence of mining speed on the stability of surrounding rock in deep thick and hard roof working faces,theoretical analysis,numerical calculation,field experiments and other methods were comprehensively adopted to analyze the influence of mining speed on the movement of surrounding rock.A mining calculation model for deep thick and hard roof working faces was established,and the influence of mining speed on the stress and energy evolution of surrounding rock in the working face was studied.Field experiments were conducted,The experiment shows that when the test working face is mined in a normal area,the mining speed should not exceed 5.6 m/d,and when mined in a fault area,the mining speed should not exceed 3.2 m/d.The research results can provide reference for determining the mining speed reasonably in deep thick and hard roof working faces.
deep miningthick and hard top platemining speedstability of surrounding rocknumerical simulation
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