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针对矿井突水模型试验中的顶板离层破坏,用有限差分程序(FLAC)中的interface单元模拟层理面,开展流-固耦合模拟研究.实现了对矿井突水模型试验中顶板离层破坏和突水全过程的模拟,模拟结果较好地刻画出煤层开采后顶板岩层从沉降、离层直至垮塌突水的整个过程,能有效反应出矿井突水前顶板围岩位移急剧增大,渗压先增大后迅速降低的过程.同时将计算结果与试验监测数据进行了对比,二者吻合较好,表明所用的方法能够正确模拟矿井突水和顶板破断过程,该方法可以为矿井顶板离层破断突水等问题提供数值基础和相关前兆参数.
Aiming at the roof delamination failure in mine water inrush model test, interface simulation of bedding plane in finite difference program (FLAC) is used to study the fluid-solid coupling simulation, and the roof delamination failure in mine water inrush model test And the whole process of water inrush. The simulation results can well depict the whole process of roof rock strata from settlement and detachment to collapse and water burst after coal mining, which can effectively reflect the sharp increase of surrounding rock displacement of roof before water inrush, and seepage The pressure increases rapidly and then decreases rapidly.At the same time, the calculated results are compared with the experimental monitoring data, and the two agree well with each other, which shows that the method used can simulate the process of water inrush and roof breaking correctly. Layer rupture and other issues provide numerical basis and related precursor parameters.