Three-dimensional Geological Modeling And Mining Subsidence Laws Based On Thick Unconsolidated Layer

Mining subsidence is generated and developed in the three-dimensional geological space.Under the condition of thick unconsolidated layer, the surface movement and deformation has itsown unique laws because of the thick alluvium’s effect. It has important theoretical and practicalsignificance to study three-dimensional geological modeling and subsidence prediction under thecondition of thick unconsolidated layer. Combining with the requirements of the data model ofdeformation prediction, the modeling method based on natural rock blocks was proposed to establishthe three-dimensional geological modeling in arbitrary boundary conditions. By researching thesubsidence coefficient using numerical simulation soft UDEC, the calculation method of subsidencecoefficient of the bedrock surface and the surface was established. The formulas of mining effectpropagation angle and the tangent of major influence angle transferring along the rocks were derived.Using power function, the sink basin edge distributeon was corrected. And the three-dimensionalprobability integral method based on the concept of non-primary section was established. Thesoftware of MSAS3Dwas developed on the VC++6.0platform combined with OpenGL. Finally, thefeasibility of above theories and the reliability of MSAS3Dprogram system were verified by usingthe measured data.