Study On The Law Of Gas Distribution In Mine Based On Ventilation Network Simulation

The prevention and control of gas disaster in coal mines is the major issues in the world. The basic study, such as the statistical study on gas pour and gas-flow forecast, is profound significance. First of all, the techniques of gas disaster prevention and control in coal field were widespreadly inquiried both at domestic and abroad literature in the paper. The second, the basic rules about the gas distributing among the vent-lanes, and the analyzing model about gas distribution rules between each vent-lane were founded based on mine ventilation theory, gas gushing rules and gas flowing rules. As an example, The Chen Jiashan mine was used to study the statistical law of quantity of gas gushing at mine source, and a forecast method for gas-flow in every lane around gas-flow area was studied by ventilation network simulation technique. A Probability Stat. Model (PSM) for gas gushing and distributing was founded upon the rules analyzed above. By analyzing the probability characteristic of gas emission, to examine whether or not the gas distribute in current tunnel conforms to the normal distribution, and then the tendency of actual gas emission was obtained.The third, a computer software was carried out to resolve the mine ventilation network, and to analyze the gas density mutual influence relations among various tunnels. Which was established by gas flow model that according with the gas flowing fundamental law. It can analysised the scope that the gas flow in the ventilation system, and the analog value of gas rate of every workings that the gas flowed.Besides, the distribution characteristic and the relativity among cladistices of the rate of gas flow in mine ventilation system and was researched.By using Visual C++6.0 software development platform, it has built gas analysis systems based on the MapX module re-development. The software could carry out the resolution of ventilation network, and could analyze and calculates of gas flowing distrution above. Beside, it can accomplish and realize ventilates the network chart gas chart and so on region graphical display and gas distribution function plans.