Local air return system capable of being quickly constructed

Abstract

The invention discloses a local air return system that can be quickly constructed, comprising a goaf filling layer, an ore body, a roadway along a vein, a return air shaft, and an air return duct. The roadway along a vein is arranged along the direction of the ore body, and the The goaf filling layer is arranged on the top of the vein roadway and its extension direction, and the return air duct is buried vertically or obliquely in the goaf filling layer, and the lower end of the return air duct is connected to the roadway along the vein or extends to the extension of the roadway along the vein direction and the upper end is connected to the return air shaft. The present invention buries the air return duct by using the goaf filling area on the upper part of the pre-mined ore body, and connects the air return duct and the air return shaft to the return air system in the mining area to form a local return air system, thereby shortening the ventilation line and effectively reducing the return airway The amount of excavation works is increased, the wind flow on the working surface is increased, the ventilation efficiency is improved, the air quality of the working environment is improved, and the production is effectively served. The invention has the characteristics of simple and reliable structure, low cost, convenient construction and high ventilation efficiency.

Description

technical field [0001] The invention belongs to the technical field of mineral excavation, and in particular relates to a rapidly constructable local return air system with simple and reliable structure, low cost, convenient construction and high ventilation efficiency. Background technique [0002] Underground mines are mainly centered on mining production. Production operations continue to produce a large amount of toxic and harmful gases and dust. In addition, as the mining continues to extend to the depths, the ground temperature rises, and in the stope due to the heat release of ore oxidation, the heat release of the filling body, and the blasting For reasons such as heat release during operation and equipment heat dissipation, if the heat in the stope cannot enter the return air system with the wind flow on the working face in time, the temperature of the stope will suddenly increase, which will make the working environment of the stope harsh, seriously affect the opera...

AI Technical Summary

Problems solved by technology

The traditional ventilation shaft excavates the special ventilation shaft and the return airway outside the mine to extract the sewage. The construction of the ventilation shaft is very difficult. Return air efficiency has seriously restricted the mining progress

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