Rapid reinforcing and pouring method for underground coal mine interchange overcast

Abstract

The invention relates to the technical field of underground coal mine construction, and particularly relates to a rapid reinforcing and pouring method for an underground coal mine interchange overcast. The method specifically comprises a reinforcing method and a pouring method, the reinforcing method is characterized in that underholings are formed in the positions, tightly attached to a top plateof the lower roadway of the interchange, of the two side walls of the lower roadway of the interchange inwards from the roadway wall of the lower roadway of the interchange; the pouring method is based on the reinforcing method. Compared with an existing conventional method, the method is small in engineering quantity and short in construction period; and manpower and material resources are saved.

Description

technical field [0001] The invention relates to the technical field of underground construction in coal mines, in particular to a method for quickly reinforcing and pouring wind bridges for underground overpasses in coal mines. Background technique [0002] In underground coal mines, the main roads in the mining area are basically arranged in a centralized manner. After the various systems in the mining area are put into use, the air inlet and return air channels of the working face will be excavated to form various systems such as ventilation of the working face for coal production. Usually, the air inlet trough is directly excavated from the inlet alley of the mining area, while the return air trough is excavated from the door of the return air alley in the mining area, and the opening section of the return air trough needs to be excavated It passes through the roof rock formation of the district street. This has formed the air inlet and air return overpass: first, before...

AI Technical Summary

Problems solved by technology

[0005] On the one hand, the problems existing in the conventional pouring method are that before the excavation machine excavates the upper roadway of the overpass, it is necessary to reinforce the roof of the lower part of the overpass roadway, and the reinforcement involves a large amount of engineering, high labor intensity, high cost of reinforcement and support, and a long construction period. It is relatively long, which requires not only large-area openings and anchor net support for the opening area, but also large-scale bottoming and densely arranged I-shaped steel sheds; on the other hand, when pouring the overpass wind bridge, the amount of concrete is very large And the cost is high, and the overpass wind bridge reinforcement period and pouring period are long, which has a relatively large impact on the auxiliary transportation system; in addition, the I-shaped steel frame shed has very high requirements for stability, and there are many unsafe factors for the shed, which is not conducive to Safe Production

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