采空侧压影响下巷道围岩变形规律研究
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摘要
以某矿7306工作面侧向支承压力影响顺槽稳定性为背景,在关键层理论的基础上建立了力学模型,并通过数值模拟软件对工作面走向不同推进度围岩变形与工作面不同推采度巷道及煤柱变形破坏进行分析,通过总结得到了采空侧压和超前支承压力增加幅度大是造成400m处轨道顺槽围岩变形量大主因;埋深加大是造成600m处轨道顺槽围岩变形量大主因。
Based on the background of the lateral support pressure on the 7306 face of a mine, the mechanical model is established on the basis of the key layer theory, and the numerical simulation software is adopted to analyze the deformation of surrounding rock with different propulsion degree and the deformation and failure of coal pillar in different driving degrees of working face. It is concluded that the large main cause of the deformation of the surrounding rock in the orbit of the 400 m is caused by the increase of the lateral pressure and the forward support pressure of the shaft, and the large deformation of the surrounding rock in the orbit of 600 m is caused by the increase of buried depth.
Based on the background of the lateral support pressure on the 7306 face of a mine, the mechanical model is established on the basis of the key layer theory, and the numerical simulation software is adopted to analyze the deformation of surrounding rock with different propulsion degree and the deformation and failure of coal pillar in different driving degrees of working face. It is concluded that the large main cause of the deformation of the surrounding rock in the orbit of the 400 m is caused by the increase of the lateral pressure and the forward support pressure of the shaft, and the large deformation of the surrounding rock in the orbit of 600 m is caused by the increase of buried depth.
引文
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