Structure for reducing ventilation resistance of air return channel in non-coal mine

By setting up a masonry false roof and a gangue slope at the intersection of the return air passage and the horizontal roadway, and by installing ventilation ducts at the narrowing arc transition section, the problem of increased ventilation resistance in non-coal mines was solved, thereby improving ventilation efficiency and reducing equipment energy consumption.

CN224413691UActive Publication Date: 2026-06-26SHANDONG REFRACTORIES GROUP
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Patent Information

Application Number
CN202521571204.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-26
Publication Date
2026-06-26
Estimated Expiration
2035-07-26

AI Technical Summary

Technical Problem

In non-coal mines, increased ventilation resistance at the intersection of return air passages and horizontal roadways leads to higher energy consumption of ventilation equipment, reduced ventilation efficiency, and may even cause ventilation system malfunctions, affecting normal mine production.

Method used

Two masonry walls parallel to the sidewalls of the horizontal tunnel are set at the intersection of the return air passage and the horizontal tunnel. A false roof is set on the top of the masonry wall. The outside of the masonry wall is filled with gangue slope. The false roof is composed of steel rail support, anchor mesh and crushed stone layer. A ventilation duct is set at the narrowing arc transition part and reinforced with cement mortar layer to form a smooth and tight ventilation structure.

Benefits of technology

It effectively reduces the ventilation resistance of the return air duct, improves ventilation efficiency, reduces the energy consumption of ventilation equipment, and ensures the stable operation of the ventilation system.

✦ Generated by Eureka AI based on patent content.
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Abstract

The utility model relates to a structure for reducing ventilation resistance of a return air channel in a non-coal mine, which belongs to the technical field of ventilation structures and comprises a building wall, a false roof, a gangue-filled upwind slope arranged on the outer side of the building wall close to a lower air channel section, and a gangue-filled downwind slope arranged on the outer side of the building wall close to an upper air channel section. The false roof comprises a steel rail support, a first anchor net, an air duct cloth layer, a second anchor net and a gravel layer which are sequentially arranged from bottom to top, and cement mortar layers are arranged outside the gangue filling lower wind slope, the gangue filling upper wind slope and the gravel layer. The waste rock filling upper wind slope and the waste rock filling lower wind slope are arranged on the two sides of the building wall, the ventilation resistance in the air return channel can be better reduced, the false roof comprises the steel rail support, the first anchor net, the air duct cloth layer, the second anchor net and the gravel layer which are sequentially arranged from bottom to top, the strength of the false roof can be guaranteed, and meanwhile construction can be faster and more convenient.
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