Method for automatic conversion of main and auxiliary fans in underground multi-stage machine station ventilation system

Abstract

The invention discloses a method for automatically converting a down-hole main and auxiliary machine ventilating system into a multi-stage machine station ventilating system. The method includes the following steps that 1, according to mine capacity planning, combined with an exploitation depth, a whole production stage is divided into two stages of an easy ventilating stage and a difficult ventilating stage; 2, simulation calculating is respectively conducted on ventilating networks of the easy ventilating stage and the difficult ventilating stage of a mine well; 3, the main and auxiliary fanventilating system is established when ventilating is easy; and 4, the multi-stage machine station ventilating system is established when ventilating is difficult. According to the method for automatically converting the down-hole main and auxiliary machine ventilating system into the multi-stage machine station ventilating system, the advantages that main and auxiliary fan ventilating is simplein management, and multi-stage machine station ventilating is low in energy consumption are fully combined, down-hole main and auxiliary fan ventilating is adopted in the easy ventilating stage, investment of engineering and machine equipment is saved, land acquisition is not needed, and ventilating management is convenient; a main machine of the easy ventilating stage is used as a II-type machinestation draught fan to relay during the difficult ventilating stage, the operation cost is low, and the effect of energy conservation is obvious; and the difficult problem that the difference of thewind pressure difference between the adjacent stages of the mine well ventilating systems is large is solved.

Description

technical field [0001] The invention belongs to the technical field of ventilation in underground metal mines and non-metal mines, and in particular relates to a method for automatic conversion of underground main and auxiliary fans into a multi-stage machine station ventilation system. Background technique [0002] In the mining of underground metal mines and non-metallic mines, with the mining and consumption of mineral resources, most mines are forced to shift from shallow to deep mining, and the mine ventilation system also changes from the period of easy ventilation to the period of difficult ventilation. In the period of difficult ventilation, compared with the period of easy ventilation, the air inlet and return lines of the system are sharply lengthened, and the wind pressure of the ventilation system increases sharply, resulting in a large difference in wind pressure between the period of easy ventilation and the period of difficult ventilation. [0003] At present,...

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Problems solved by technology

If a single main and auxiliary fan is used for ventilation, it is necessary to select and set the main fan according to the working conditions in difficult times, resulting in low efficiency and high energy consumption of the main fan during easy ventilation; if a single multi-stage ventilation is used, It will lead to a large number of station fans in the period of easy ventilation and difficult management, and the fans installed in the period of easy ventilation cannot meet the working conditions of the difficult period of ventilation, and cannot continue to be used in difficult periods, and the fans need repeated investment

[0004] The Chinese patent with the authorized notification number CN203145985U discloses a local centralized ventilation structure of an underground multi-stage machine station, which divides the ventilation system into one or more independent local centralized air intake-local centralized return air and / or Partially dispersed air intake-locally concentrated return air structure, used to solve the problem of turbulent air flow in the ventilation system caused by poor ventilation effect of multi-level machine stations in deep mining

However, this ventilation structure needs to set up a return fan station in each return air alley. The number of fans is large, the investment is high, and the management is difficult. The ventilation network is handled in the same way during the period of easy ventilation and the period of difficult ventilation. It is not suitable for the period of easy ventilation and the period of difficult ventilation. Mine with large wind pressure difference

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