为研究采场动压对陷落柱裂隙带的扰动破坏机理,采用FLAC3D程序模拟裂隙带内水平应力变化及塑性区分布随工作面推进时的规律。数值模拟结果表明,陷落柱周边裂隙带内的裂隙受开采影响极易发生扩展贯通,进而诱发矿井突水事故。分析结果表明,裂纹因所受水平地应力变小而发生扩展与贯通,从而使裂隙带成为矿井导突水优势通道。 In order to study the mechanism of disturbances and disturbances of dynamic pressure in collapse column, FLAC3D program was used to simulate the horizontal stress changes and the distribution of plastic zone along the working face. The numerical simulation results show that the fissures in the fracture zone around the collapse column can easily expand and penetrate due to the mining, which can cause the mine water inrush accident. The analysis results show that the crack expands and penetrates due to the smaller horizontal stress, so that the fracture zone becomes the predominant channel of water conduction and water inrush.