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陷落柱突水受多种因素影响,其中煤矿工作面推进引起的区域岩体应力变化是主要原因。本文以陷落柱内承压水头上升高度和陷落柱内渗流量变化为评价突水危险性的简化判据,根据渗流应力耦合经验公式,借助FLAC3D软件自带的FISH语言开发了流固耦合程序。应用该耦合程序并结合团柏矿某工作面的工程实际,对承压水上边缘充水导水型陷落柱的突水全过程进行了数值模拟。通过模拟结果和力学机理分析,得出了该边缘充水导水型陷落柱的渗流特征及工作面突水危险区域,从而为煤矿安全生产提供了指导。
Bursting water inrush is affected by many factors, of which the change of stress in regional rock mass caused by the advance of coal face is the main reason. In this paper, based on the empirical formula of coupled seepage stress, the fluid-solid coupling program was developed by using FLAC3D software’s FISH language to simplify the criteria for evaluating the water inrush risk. Based on the engineering practice of a working face in Xuanbo Coal Mine, the coupled process is used to simulate the whole process of water inrush of submerged aqueduct collapse column. Through the simulation results and mechanics analysis, the seepage characteristics and water inrush danger zone of the water-filled aqueduct are obtained, which provides guidance for coal mine safety production.