Study On Mining Subsidence 3D Modeling And Visualization Methods

Coal plays an important role in the national economy development as our primary energy. However, the underground mining of coal resources leads to some problems such as ground surface movement and deformation, ground surface buildings and other facilities were damaged, land subsidence and damages were caused and so on. Mining subsidence prediction is a complex issue which related to geology, mining, mapping and other subjects, its in-depth study is very important. The author explores the combined approach of three-dimensional visualization modeling and subsidence prediction theory through systematic analysis the study status quo of mining subsidence prediction, and provides analytical techniques means for the detailed study of surface movement and deformation processes. This work was Supported by National High Technology Research and Development Program of China (863 Program) "Digital mining key technology and software development" (No.2009AA062704); Supported by Science and Technology Planning Project of Shandong Educational Commission "Research on the key technology of mining subsidence prediction and Three-dimensional visualization" (No. J09LG54).This paper aims to establish Three-dimensional stratum and visualization algorithm model with Three-dimensional modeling and visualization technology, takes into account the structure of overlying strata, mining methods and other conditions related to geological and mining, designed and developed Three-dimensional visualization system software of mining subsidence. The main study contents are as follows:(1) Based on random medium theory ideas, considering the rock and ground movement as a random process, derived the formula of ground movement and deformation caused by mining under different conditions, established the corresponding computational model for the developing of mining subsidence Three-dimensional visualization software;(2) By classifying, summering and assembling 3D geological phenomena involving in mining subsidence, established the hierarchical structure for the phenomena of geological and engineering, such as Stratum structure, mining conditions and so on, proposed a 3D stratum model DEMs-TEN which was mixed by multi-DEM (Digital Elevation Models) and TEN (Tetrahedral Network),which uses multi-DEMs to build the surface and layered geological surface, uses TEN to build layer geological body, taking into account the exact expression of surface and body;(3) Based on DEMs-TEN mixed model, proposed a constrained boundary stratum slice algorithm, which reproduces stratum details within through the three-dimensional model slices and reveals the spatial distribution law of mine geological bodies, provides the basis for researcher to establish mining subsidence prediction model correctly and select calculate parameter accurately;(4) Studied the coupled model of Three-dimensional strati graphic model and Subsidence prediction model, established the calculation and visualization expressions for ground movement and deformation index based on DEMs-TEN model, designed and developed the mining subsidence three-dimensional visualization system---3D subsidence, provides a new techniques and tools for the study of mining subsidence prediction.