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为研究采煤过程中,承压含水体上煤层底板的破坏特征,以淮北煤田袁店煤矿1011综采工作面为实例,结合煤层顶底板岩层特性,建立三维地质模型,通过FLAC3d数值模拟开挖过程得出煤层底板破坏深度值及塑性分布特征。结果显示数值模拟可反映在采动影响下底板的破坏特征、破坏范围及应力变化。该研究表明数值模拟可以为矿井生产决策及防治水设计提供可靠依据。
In order to study the failure characteristics of coal seam floor under confined aquifer during coal mining, taking the 1011 fully mechanized coal mining face of Yuandian coal mine in Huaibei coalfield as an example, the 3D geological model was established based on the characteristics of top and bottom rock strata of coal seam. Excavation by FLAC3d numerical simulation The process results in the value of the depth of destruction of coal seam floor and the plastic distribution characteristics. The results show that the numerical simulation can reflect the failure characteristics, failure range and stress changes of the floor under the influence of mining. The study shows that numerical simulation can provide a reliable basis for mine production decision-making and prevention and control of water design.