The Research On The Optimizal Parameters Of Face System In Fully-mechanized Longwall Mining Pitched Seam

Recent decade, with rapid development of fully-mechanized coal mining technology, exploitation of pitched seams in China is increasing year by year, yield is more and more big, efficiency has greatly been improved.At present, the research on fully-mechanized longwall along strike of pitched seam in China is devoted to equipment selection and the sduty of coal mining technology. Although fully-mechanized mining equipment and coal mining technology makes great progress, the study of system optimization in related parameters of mining pitched seam technology is less. With the request of safety and efficient to coal mining, should strengthen the quantitative research of related parameters as soon as quickly. Especially, it should be strengthened the study about parameters optimization of fully mechanized pitched seam, and provide basis for design.This paper discusses optimization of parameters of working face in fully-mechanized longwall along strike of pitched-seam, including face length, drawing speed of face, oblique angle, parameters of main equipment, etc. Among them the mainly parameter is the face length, and established the objective function and constraint condition of face length.Basis on the reliability and the face length, established a related mathematical model. When the emulsion pump station was located in conveyance road, due to the special geological conditions of pitched seam, emulsion pump station cannot supply enough liquid for hydraulic support nearby the return airway, which limited the face length. As the optimized design method, this paper uses base on operations research (OR), system engineering (SE), computer subject, etc. synthesizing optimization approaches. Meanwhile based on the relationship of face length and drawing speed of face, given the criterion of reasonable face length, so we can get the result by calculation, which can determine change the face length or not. Analysis the sensitivity that the value of main cost parameters on the face length and give the main cost parameters that need emphatically considered. When the pseudo-inclined caving was used in pitched seam, analysis the mathematical model of lead quantity and oblique angle . Under the influence of pitched seam, established related mathematical model, including the traction force and breaking force of shearer, the working resistance and adjusted frame force of hydraulic support, transport capacity of scraper conveyor. The economic mathematical model of working face of parameters optimization in fully-mechanized longwall along strike of pitched seam is established, and obtained the optimal parameter values. Based on it , using programming language of object-orientation and visualizing Visual Basic 6.0, software on the optimization of the face length in fully-mechanized longwall mining pitched seam. The software is used in No.6134 workface and No.5634 workface of LvShuiDong mine, and No.44407 workface of WangJiaShan mine. It has been shown that the result of computer was anastomosed with fact, which can be used for reference to mining design and production about pitched seam.