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人工抽水导致地下水下降而诱发塌陷是常见的诱发因素之一,但目前缺乏相应的动态过程研究。本文以典型的抽水致塌案例为原型,建立相应的地质模型及数值分析模型,采用FLAC3D软件模拟了其动态演化过程,分析结果表明,抽水过程中的渗透力、动水压力及真空吸力对土洞的发育及最终塌陷具有重要作用。同时通过分析数值模型中的跟踪点监测数据,验证了抽水早期的位移及孔隙水压力变化较大,是塌陷发展的最快速的一个阶段。
Artificial pumping lead to the decline of groundwater induced collapse is one of the common predisposing factors, but the current lack of corresponding dynamic process study. In this paper, a typical case of pumped collapse is taken as a prototype, and the corresponding geological model and numerical analysis model are established. The dynamic evolution process is simulated by FLAC3D software. The analysis results show that the permeability, hydrodynamic pressure and vacuum suction of pumped water Cave development and eventual collapse have an important role. At the same time, by analyzing the monitoring data of the tracking points in the numerical model, it is verified that the displacement and the pore water pressure in the early stage of pumping are greatly changed, which is the fastest stage of the collapse development.