| Under the background of paying more and more attention on coal's safe produce by our country, the first and important problem is ventilation of mine. At present, ventilation of mine has some urgent problems to be settled, such as the heavy measure, high cost of actual operation, late of feedback info, lowness of ventilation efficiency and precision, difficulty to realize local and whole controllability & visibility. Some measure should be taken, such as taking method and theory for mine project, exerting correlative high and new technique in computer technology(modeling and render technique based image, wavalete, intelligent virtual environment), creating three dimension dummy scene, scheming laneway data and creating network graph, adjusting and optimizing parameter of ventilation equipment(wind window, wind door, wind bridge, blower and local blower, etc.). It has great realistic meaning and farsighted strategy meaning for deleting safety accident and realizing safety produce.The paper combines together the visual reality technique and ventilation theories of mine. It expatiates the theory of ventilation system and wind net calculation, and introduces the basic law of ventilation of mine in detail. Mathematics model of wind net calculation is given out. It presents the most advanced method of wind net calculation and program flow chart.The paper discusses the visual reality technique and its development & applications in detail, and introduces its character, structure and class. It points out the four key technique of visual reality: dynamic environment molding, real-time three-dimensional graph creating, three-dimensional displaying and multi-dimensional person-machine interaction.Visible molding of mine ventilation, using image-based method, is discussed in detail. The paper introduces modeling of visual laneway, visual equipment and visual human. The application of fractal geometry in molding is expatiated in detail, and innovatively presents a new fractal image coding based on variance and similar expansion arithmetic. Also a enhanced coding arithmetic is given. For movement simulation, it gives out a new method of extension algorithm for B-splines with GC~2-continuous. The basic measure, condition of continuous extension and calculation of control vertex are introduced in detail.According to characteristic of non-steady state methane dispersion model, the paper presents mathematical model of non-steady airflow in mine networks under mechanical disturbance. It may supply the mathematical basis for analysis of mine ventilation. A mathematical model of dimensional non-steady airflow in mine network under mechanical disturbance is presented; also the calculation method model is given. The paper simply introduces intelligence visual environment and its present research, and discusses its six key techniques: object molding with complex behavior and life characteristic, human body animation oriented to IVE, simulation of intelligence life, real-time image rending, intelligence human-machine/human-human interaction, knowledge denotation and reasoning of IVE. Also molding idea of visual environment is given out.On the base of intelligence visual environment's system structure, the paper realizes ventilation simulation of mine by multi-agent system, and discusses the theory foundation of agent. It gives out the definition, structure and type of intelligence agent. The best way to construct agent is hybrid agent. After introducing multi-agent system, agent oriented programming and theory model of BDI, a new BICC structure of mobile agent theory is presented (i.e. intention system composed by brief, intent, capability and commitment). It defines a formal language L, model and semantic for agent's brief. Also the formal semantic of agent's capability is defined by planning tree. Combined ant arithmetic, a six-set model is established. Taking a large mine of shanxi province for instance, the variance of new simulation way is no more than 6% compared to iterative calculation.
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