Underground blind tunnel ventilation system

Abstract

The invention relates to a ventilation system, in particular to an underground blind tunnel ventilation system. Local ventilating fans of the system are arranged in a crossdrift, one inlet-outlet of the local ventilating fans is formed in a working face range of a blind tunnel through a drainage air barrel, the other inlet-outlet is connected to a branch barrel with an opening facing the wind direction and a branch barrel with an opening opposite to the wind direction in the crossdrift through a tee joint respectively, an air channel switching valve plate for opening and closing the two branch barrels is installed at the position of the tee joint, a smoke dust sensor is arranged at the rear end of the drainage air barrel, a smoke dust sensor is also arranged at the front end close to the drainage air barrel, of the blind tunnel, and the smoke dust sensors are connected with a fan control module through data lines. The problem that traditional system smoke dust air flows are in relatively-balanced low-efficiency state is solved, smoke dust close to the head-on position performs outwards diffuses and moves to an effective suction distance or effective range of the air barrel so as to effectively improve the smoke dust explosion efficiency in blind tunnel tunneling operation work.

Description

technical field [0001] The present invention relates to a ventilation system, in particular to an underground single-head tunnel ventilation system. The technology is related to the process of ventilating and removing blasting dust in single-head tunnel excavation or limited space excavation working faces in underground ore mining and other underground engineering constructions. Background technique [0002] In underground ore mining and other underground engineering construction, single-headed excavation is a common job. At present, in most cases, explosive blasting is used to break rocks. The resulting blasting smoke, carbon monoxide, nitrogen oxides, etc. are poisonous and harmful. The gas needs to be exhausted from the working face as soon as possible through the ventilation operation and replaced by fresh air flow to provide good air environment conditions for subsequent operations. [0003] So far, the ventilation method of the excavation face of the single-headed road...

AI Technical Summary

Problems solved by technology

In order to improve the efficiency of the fan, during the ventilation process, the dirty air should be relatively moved to the effective suction range or effective range of the air cylinder. For this reason, there is an electromechanical control method to move the air cylinder forward after blasting. attempts, but there are still major problems in its safety and reliability

In addition, in order to improve the intensity of ventilation and smoke exhaust and reduce the operation cycle time, the mixed ventilation of pressure and suction is usually used, but this will lead to increased equipment and maintenance costs and increased energy consumption. Also in the middle and late stages of ventilation, there is smoke and dust near The head-on area is relatively static and balanced, and it is difficult to discharge the problem

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