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叙述煤矿底板软硬相间岩层开采过程中的裂隙发育规律,并分析底板对承压水隔水能力,及在煤层开采过程中底板突水通道变化的规律。运用FLAC3D数值模拟软件中的流固耦合模块,模拟开采过程中底板塑性区、底板压力变化以及动态开采中水流矢量分布。结果表明,随着开采工作面的推进,承压水向采空区渗入在前方煤壁处发生突水,从而为煤矿底板突水的防治提供理论依据。
The law of fracture development during the process of soft and hard rock in the coal floor is described, and the law of floor water-proofing capacity of confined water and the variation of floor water inrush channel during the process of coal seam mining are analyzed. The fluid-solid coupling module in FLAC3D numerical simulation software was used to simulate the plastic zone of bottom plate, the pressure change of bottom plate and the flow vector distribution in dynamic mining. The results show that with the advancement of mining face, water infiltration of confined water into mined-out area causes water inrush at the front coal wall, which provides a theoretical basis for the prevention and treatment of water inrush in coal mine floor.