On-line closed loop optimally-adjusting-and-controlling method for mine ventilation system

Abstract

The invention provides an on-line closed loop optimally-adjusting-and-controlling method for a mine ventilation system. A constructed mine ventilation on-line closed loop optimally-adjusting-and-controlling system comprises a mine ventilation monitoring platform, air needing air flue state collecting subsystems distributed to air needing air flues, draught fan working condition collecting subsystems distributed to the air needing air flues and adjusting and controlling subsystems distributed to adjusting air flues and used for adjusting the wind resistance change amount of a wind resistance adjusting device. According to the on-line closed loop optimally-adjusting-and-controlling method, as the actual measurement air supply amount of wind needing points and draught fan actual working conditions are directly used for calculating target function values, and the actual adjusting amount of the wind resistance adjusting device serves as a control strategy, the problems of inaccuracy, agnosticism and the like of parameters of the ventilation system can be effectively solved, a large number of state identification sensors of the ventilation system can be saved, and more importantly, the adjusting effect can be directly obtained. On-time as-required low-power-dissipation air supply of the mine ventilation system is fundamentally guaranteed, and airflow control over the mine ventilation system in the normal period and the catastrophe period can be effectively achieved through the method.

Description

Technical field [0001] The invention belongs to the technical field of mine ventilation automation control, and specifically relates to an online closed-loop optimization control method for a mine ventilation system. Background technique [0002] The core task of mine ventilation is to ensure that all locations in the mine use air on time and on demand, so as to ensure safe, efficient and green mining in the mine. Because the underground ventilation system is intricate and complicated, it is a complicated system engineering from environmental monitoring, air demand calculation to system adjustment. It is difficult to meet the needs of underground safety production and energy saving only by manual analysis and adjustment or local automatic adjustment. Therefore, the overall optimization of mine ventilation is realized. The automatic calculation of the adjustment scheme is a technical problem that must be solved to realize mine ventilation automation. [0003] Although people have c...

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Problems solved by technology

It can be seen that it is impossible to adjust the air volume of air duct B alone to reach the target air volume; in addition, the adjustment of air duct B also affects the air volume of other air ducts, making the whole system in a chaotic state

[0005] (2) For the fixed air volume solution algorithm, since the adjustment point cannot be transferred, it is easy to find an infeasible solution, and even the wind resistance is negative

[0006] (3) As for the maximum resistance path adjustment method, it is not economical in itself. Moreover, due to the time-varying nature of the air resistance of each air duct and the air volume required by each air point, the maximum path changes and the adjustment point also changes. Therefore, the maximum resistance Pathway regulation is not feasible

[0007] (4) For the linear programming adjustment method, due to the oversimplification of the optimal adjustment problem of the mine ventilation system, the calculation results are often not in line with reality

[0008] (5) For the existing nonlinear programming adjustment method, the two-stage method of first optimizing the system and then adjusting the fan is adopted. Since the joint optimization of the system and the fan is not considered, the global optimal solution cannot be obtained, and it is not suitable for Real-time voltage equalization requirements during catastrophic periods

[0009] (6) For the global adjustment method, based on the establishment of an accurate calculation model between the opening area of ​​the damper / window and the adjustment value of the wind resistance and the identification of the global state, it is not only required to install a large number of sensors in the ventilation system, but also requires fine calibration. Nuclear and modeling, not only the cost is too high, but also the anti-interference ability is poor, it is difficult to achieve the purpose of real-time wind control

[0010] It can be seen that the existing optimization and adjustment schemes of various mine ventilation systems have not essentially realized the overall optimization and control of the mine ventilation system, and cannot meet the mine's air supply needs during normal and catastrophic periods.

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