3D Visualization Simulation Of Gas Diffusion In Excavation Roadway

Gas outburst is one of the important factors affecting coal mine safety, but gas is colorless and tasteless, which is difficult to be detected by naked eyes, and is difficult to display directly as well. Traditional gas dredge based on actual production experience, lack of taking into account production conditions, three-dimensional environment, escaping dynamic changes, comprehensive theory ventilation analysis and visualization of simulation, the impact of the improvement of the scientific level of the safety analysis.Therefore, this paper research coal mining face gas leak diffusion dynamics simulation, introduction of the fluid mechanics theory and particle systems, give full play to the physical modeling method based on hydrodynamic gas flow patterns and the presence of characteristic morphological accurate solution. Main research work and achievements are summarized as follows:(1) Stress analysis of gas particles and according to the underground actual diffusion environment, determine the effect of the flow factor, build physical model based on three-dimensional local environment of gas diffusion generic. Against specific features of underground gas diffusion and romantic movement, determine the gas diffusion in the roadway as no chemical reaction without heat exchange individual multicomponent diffusion problems, and consider the gas particles and air diffusion coupling, constructed a half open half closed the local space environment pressure incompressible gas diffusion physical model.(2) Based the model, analysis if underground mining face gas leak at different rates, and in the local fans turned on or off, different wind speed the diffusion case of gas, obtained under different conditions gas concentration values which change over time, quantify gas concentration within each region of the roadway, and take a rigorous test simulation.(3) Combined with particle system characterized, let the colorless, odorless invisible gas visualization. As use particle system for fluid simulation is efficient, in practical underground gas diffusion to establishment of a real flow of gas to simulate particle system. GIS 3D spatial interpolation algorithm is reconstructed by Unity3 D, and the dynamic visualization of the gas concentration in the tunnel is carried out.This paper provides a feasible reference for the decision analysis of the relevant staff through the model of the law of gas diffusion, quantitative gas concentration and three-dimensional simulation.