完整井与非完整井抽水引起的地裂缝活动量计算模型

Calculation Model of Ground Fissures Activity Caused by Pumping from Complete Well and Incomplete Well

抽水引起地裂缝活动的现象目前已经引起了人们的关注。抽水改变了土体中承压含水层的孔隙水压力分布,引起了土体的变形,地裂缝错断了地层使得地裂缝左右两侧发生差异沉降,进一步诱发地裂缝的活动,这是一个复杂的物理力学过程。充分考虑了抽水引起地裂缝活动的机理,基于理想地层模型,采用流固耦合的计算方法,基于FLAC3D6.0软件平台编译程序,建立地裂缝活动量计算模型,计算和模拟不同抽水流量条件下完整井和非完整井抽水引起的地裂缝活动量。结果表明,随着抽水流量增大,地裂缝的活动量增大,完整井比非完整井引起的地裂缝活动量大。

The phenomenon of ground fissure activity caused by pumping has attracted people's attention.Pumping changes the pore water pressure distribution of the confined aquifer in the soil,causes the deformation of the soil,and the ground fissure breaks the stratum,resulting in differential settlement on the left and right sides of the ground fissure,which further induces the activity of the ground fissure,which is a complex physical and mechanical process.In this paper,the mechanism of ground fracture activity caused by pumping is fully considered.Based on the ideal formation model,the fluid structure coupling calculation method is adopted,based on FLAC3D6.0 software platform to compile the program,establish the calculation model of ground fracture activity,calculate and simulate the ground fracture activity caused by pumping from complete wells and incomplete wells under different pumping flow conditions.The results show that with the increase of pumping flow,the activity of ground fractures increases,and the activity of ground fractures caused by complete wells is larger than that caused by incomplete wells.