Study On Water The Inrush Mechanism Of Pressure Karsts Water

Based on the field investigation, comprehensive research methods combining theoretical analysis and three-dimensional numerical simulation are carried out to investigate the distribution of the complicated stress and displacement field, plastic range, failure mechanism, displacement and movement laws and the interaction influence under confined groundwater.Firstly,Darcy motion equation which considered the movement of solid skeleton and continuity equations of the solid matrix and fluid are established, through which the coupling movement control equations of Seepage field and stress field was obtained; the time series formula of each node of the pore pressure and seepage are.obtained through the dimensionless and transform of difference formulas. Subsequently,the mechanical analysis of coal floor key layer is studied on certain angle of the thin plate theory, the spread law of stress field and the principal stress anywhere,analysis of the main influencing factors are explored, And the destruction of the rock bottom after structure and stability is analyzed. Finally, By the use of FLAC3D numerical simulation software the different pore pressure, aquifer litho logy, under the influence of the width of the mining face, coal floor rock formation in stress field and displacement field migration rule and the plastic region distribution are explored. The results in this paper provide a theoretical basis for safe mining of high pressure water. At the same time the results also provide beneficial lessons for other similar geological conditions.