跨采巷道动压变形特征数值模拟分析
Numerical Simulation Analysis of Dynamic Pressure Deformation Characteristics of Cross Mining Roadway

在矿山开采过程中，在动压影响下巷道变形特征明显，特别是工作面跨巷道回采时，巷道受动压影响更为明显。本文采用数值模拟方法对跨采巷道的围岩变形特征进行了分析，巷道原支护在跨采条件下难以承受采动动压，导致巷道大变形；在上覆工作面跨采采动压力影响下，下方巷道顶底板累计变形量达1000 mm，两帮变形量主要体现在巷道下帮，上部的变形量不明显，同时，巷道底鼓量较大，因此，生产大巷在跨采前需采取专门的加固措施。
In the mining process, the roadway deformation characteristics under the influence of dynamic pressure are obvious, especially when the working face is across the roadway, and the roadway is affected by dynamic pressure more obviously. The paper uses a numerical simulation method to analyze the surrounding rock deformation characteristics of the cross mining roadway. The origi-nal support of the roadway is difficult to bear the mining dynamic pressure under the cross mining condition, resulting in large deformation of the roadway; Under the condition of cross mining dy-namic pressure, the cumulative displacement of the roof and floor of the roadway exceeds 1m, and the displacement of the two sides is mainly caused by the lower side, the deformation of the upper side is small, and the deformation of the bottom drum is obvious. The production roadway shall be reinforced before cross mining.