The Tungsten Mine Ventilation System Nanwenhe Roadway Cross-section Dynamic Optimization Of Energy Saving Ventilation

Mine ventilation technology is one of the most important aspects in mine safety science areas. Mine ventilation system linked to the every working sites underground is the most crucial subsystem of large underground mining system, which attaches to and restricts the mining large-scale system. Whether the mine ventilation system works well will affect the whole well security situation. The quality of the general ventilation system is assessed from the technology, reliability and economy. At the optimization of the ventilation system, determination of the cross-section of ventilation roadway is especial significant, how much the area of the cross section is reasonable which lies in downcast and upcast air shaft, this is also relation to reliability, technological and economic factors.This paper is lying on this, "the study of complex ventilation system optimization in Southern Twin River tungsten, Wenshan Malipo Zijin Tungsten Group Co., Ltd." which is carried out to do some optimization of cross-section of ventilation roadway and reduce the cost of mine ventilation, and also make some useful references for the next step to make the mine Ventilation better. When the project is going on, due to the special geological conditions of the mine, rigidity and stability of the rock is so higher and better, that the ventilation roadway should choose the larger area. The result is that ventilation power costs less benefits because of the resulting air resistance is small, but also has a greater ventilation roadway infrastructure costs and maintenance fees. So choosing the appropriate cross-section of ventilation roadway, which can make the economic benefits the best points in order to achieve ventilation and energy conservation, which is very this paper focus on. Through the reconstruction project of ventilation system of the actual situation in the Southern Twin River tungsten mine, we can make the optimization of the new return air cross-section well and extent to determine the best mathematical optimization method, and establish the whole mine optimization dynamic optimization model, and ultimately achieve the mine ventilation Section optimization. Based on the previous researching achievments, the following works are achieved:1,Summarizing the theoretical study of the optimization of the ventilation system, and raising the importance of item study and the cross-section of ventilation roadway cross section exerting the vital role in the optimization of ventilation system. This paper cites the previous work about cross-section of ventilation roadway optimization, Compares to the previous typical method of optimization model. We think it's not only the roadway infrastructure and maintenance costs should be considered but the ventilation power costs should be considered to make the optimization model, and under the reliability and technology factors to cost the lowest fees.2,Introducing the traditional methods about the determination of the ventilation cross-section of ventilation roadway and the problem of analyzed traditional methods, Making the determination of the cross-section of ventilation roadway into mathematical optimization problem. This paper compares a variety of ventilation Mine cost model to study the reasonableness and accuracy, and ultimately derive the optimal total cost of the ventilation roadway mathematical model-that is solved by Least squares fitting experience at a reasonable formula, taking into account Into the time value of money, to make the model versatile, and to determine optimal cross-section of roadway in a single ventilation by the model.3,This paper argues that the ventilation roadway network is divided into the overall and hierarchical optimization, static and dynamic optimization, for optimization problems in the complex mine ventilation system, it is more reasonable and effective to considered as a development phased of the dynamic system. Through the analysis of the relations of the ventilation roadway infrastructure costs, maintenance costs, and power costs, we can establish a mathematical model of whole mine cross-section of ventilation roadway, which can be determined a optimal Section by an iterative search.4,According to the investigation of the South Twin River Tungsten Mine ventilation status, we get the basic necessary data for studied, and find a way of thinking about the question, that is how to do the studies on the optimization of the cross-section of roadway in the metal mine Large sections with the special geological conditions. and then take the established mathematical model into the southern Twin river tungsten mine to optimize its ventilation system, theoretical research on the optimization method, and the determination of the optimal ventilation of new cross-section of roadway in the South Twin River tungsten deposit and the dynamic process Optimization of ventilation roadway of whole mining. The determination best cross section of the single roadway provide a theoretical basis for the determination of cross-section of roadway of mine, and also provide methods for the dynamic optimization of the whole mine and the improvement of whole mine system.5,For the empirical of roadway costs formula by least squares method, this paper develops a MATLAB program to solve the fitting coefficients. But for the dynamic optimization model of the entire mine, the paper is prepared the counting procedures in the Visual Studio environment. By using Iterative search to solve complex computer program calculation process, simplifying the calculation, to determine the best cross-section of ventilation roadway, and select the optimal cross section as to achieve a certain effect of energy saving. To some extent, these methods enrich the optimization theory mine ventilation, provide theoretical foundation for the determination of ventilation roadway cross section of mine with the larger cross-section, and provide a scientific basis for the development of ventilation.