Research on Transparent Geological Safeguard System of Sijiazhuang Coal Mine Based on Three-Dimensional Geological Modeling
Three-dimensional geological modeling based on triangulated irregular networks(TIN)often produces deterministic models that do not capture geological properties.Therefore,a method combining probability analysis and random simulation is proposed to establish a three-dimensional TIN geological model and form a transparent geological security system for coal mines.Firstly,generate a Markov chain sequence of the formation and combine it with the correlation of the borehole to obtain the transition probability matrix of the virtual borehole.Then,use this matrix to describe the probability of formation changes.Secondly,a probability model of formation thickness was constructed,and an overall probability model was established using the TIN algorithm.Validation drilling was added to adjust the virtual drilling to obtain the maximum probability model of the study area.The overall probability model and maximum probability model of multi-source coal mine geological bodies were used to analyze and visualize the geological morphology,thus forming a transparent geological guarantee system for coal mines,which was verified in engineering in Shanxi region.The results indicate that the proposed modeling method effectively visualizes the formation morphology and quantifies the uncertainty of the formation.
three-dimensional geological modelingprobabilistic modelMarkov chainMonte Carlo simulation
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