Mechanism And Control Technology Of Floor Heave For God-side Entry Retaining Of Three Soft Coal Seam In Deep Coal Mine With Large Section

With the increasing depth of mining, roadway showing a significant soft rock deformation characteristics. The "three soft" seam along god-side entry retaining problem is one of rock mass deformation of the roadway and the main form. In this paper, take Zhuji Mine 1111(1) track tunnel as the basis, the theoretical analysis, numerical simulation and field measurement methods for the mechanism and control technology of floor heave for god-side entry retaining of three soft coal seam in deep coal mine with large section, for the management of floor heave for god-side entry retaining of three soft coal seam in deep coal mine with large section to provide a theoretical basis.Combine with Zhuji Mine 1111 (1) track tunnel's geological conditions, analysis the mechanical model of floor of god-side entry retaining of three soft coal seam in deep coal mine with large section, draw a bottom drum mechanism theoretical formula. Selected according to specific geological conditions were four factors roadway depth, lithology floor, filling belt width and the roadway width, and analyzed by theoretical calculation, the influence of different factors on the bottom of the drum. By FLAC3D software, using single factor analysis, simulation from the four aspects of the floor heave for god-side entry retaining of three soft coal seam in deep coal mine with large sectioaCombine with the mechanism of floor heave for god-side entry retaining of three soft coal seam in deep coal mine with large section, the corresponding supporting programs, analyzed under different support schemes floor heave control of the numerical simulation, select the most appropriate roadway support program in engineering practice to verify its legitimacy.