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• W4385841525 abstract "The asymmetric deformation of surrounding rock in inclined coal seam roadway is serious, and its stability is difficult to control. Based on the PU's arch theory and considering the development process of the progressive formation of the self stable balance circle (SSBC), this paper establishes a mechanical model of the SSBC for the right-angle trapezoidal roadway in the inclined coal seam. The mechanical analysis and morphological characterization of the forming process were carried out, and the numerical simulation and physical similarity simulation test were carried out to verify. On this basis, the stability control method of roadway in inclined coal seam is improved, and the asymmetric support scheme of roadway is optimized, which is verified by numerical simulation and field monitoring. The results show that the roadway surrounding rock forms a quasi elliptical SSBC after self stabilization, and the mechanical formula of the shape of the SSBC is derived and characterized. Through numerical simulation and physical similarity simulation experiments, the dynamic evolution process of SSBC is depicted, and the gradual forming evolution characteristics of SSBC are revealed. With the increase of the deformation of the surrounding rock, the effective height and width of the roadway gradually increase, and finally a quasi elliptical SSBC deflecting to the left side of the roadway is formed. Based on this, the asymmetric support principle that can control the stability of surrounding rock by improving the asymmetric stress concentration is proposed, and the asymmetric support scheme is designed, that is, the anchor bolts (cables) are arranged to the right sidewall, and the sidewall angle weakening area is intensively supported. Through numerical simulation and field monitoring, the support effect is remarkable." @default.
• W4385841525 created "2023-08-16" @default.
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• W4385841525 date "2023-12-01" @default.
• W4385841525 modified "2023-10-17" @default.
• W4385841525 title "Analysis and control of self stable balance circle of surrounding rock of roadway in inclined coal seam" @default.
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• W4385841525 doi "https://doi.org/10.1016/j.apm.2023.08.020" @default.
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