采动引起的岩体变形及地下水流动的数值分析——稳定流研究

NUMERICAL ANALYSIS OF ROCK DEFORMATION AND FLOW OF UNDERGROUND WATER CAUSED BY COAL EXTRACTION——STABLE FLOW

提出的有限元模型可以有效地预计地表沉陷以及地下水的流动．实例分析表明，地层水力传导率与采动影响而引起的岩体变形紧密相连．水力传导率变化最大的地方发生在采区垮落带或严重裂隙带．研究表明，缩小开采宽度可有效减小采动对地表下沉及水力传导率的影响。

The finite element model proposed by this paper can effectively predict the surface subsidence and flow of underground water. Case study has shown that the hydraulic conductivity of the strata is closely related to rockmass deformation due to coal extraction. The locality of biggest variation of hydraulic conductivity is in the caving zone of the mining section or heavily fractured and fissured zone. The investigation indicates that reduced mining width can effectively control the influence of coal extraction on surface subsidence and hydraulic conductivity, especially when the mining depth increases.