A Method of Utilizing the Goaf as a Mine General Return Air Shaft

Abstract

The invention discloses a method for utilizing a goaf as a total return air well of a mine. The method comprises steps of selecting an available goaf and filling each stope goaf therein for a metal mine of underground mining of an very thin ore body, a thin ore body or a medium-thick ore body which are steeply-inclined, safely treating a passage therein, and subjecting surrounding passages communicating with the passage to anti-leakage treatment; communicating the middle gallery of the lower end of the goaf with a centralized return air well of a lower mining ore body, taking the middle gallery of the upper end of the selected goaf as a total return air well, and gathering all or part of return air of polluted air of the lower to-be-mined ore body to a total return air gallery via a stoperaise in the goaf for being discharged to the ground. The goaf passage is used as the total return air well or the newly added total return air well. While improving the mine ventilation system, the mine without the special total return air well is not required for digging a special return air well, so that the mine of the small special return air well section does not need to expand the section of the special return air well, which greatly reduces the cost of mining.

Description

technical field [0001] The invention belongs to the field of underground mining, in particular to a method for using a goaf as a mine general return air shaft. Background technique [0002] Some metal mines are mined underground. With the increase of mining depth and the expansion of mining area, the ventilation system of the mine is particularly important in order to send fresh air into the underground, discharge the dirty air out of the mine, and ensure the air quality of the underground operation point. [0003] However, some mines do not have a dedicated total return air shaft, and directly use the goaf as the total return air channel, which has the defects of serious air leakage and poor controllability of air flow, so that the underground fresh air cannot be effectively utilized. In addition, the goaf is easy to collapse after forming for a long time, and the return air channel will be blocked after the collapse, so the reliability of the goaf as the total return air c...

AI Technical Summary

Problems solved by technology

[0005] With the increase of mining depth, the return air route is lengthened, and the wind resistance of the return air section increases significantly, which increases the burden on the main fan and increases energy consumption

[0006] Due to the above problems in some mines, there are serious defects in the mine ventilation system, which can easily cause poisoning and suffocation accidents. The air quality and temperature of underground work sites cannot meet the requirements of the "Safety Regulations for Metal and Nonmetal Mine", resulting in an increase in the accident rate and occupational disease prevalence rate. , The service life of mechanical equipment is shortened

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