A large deep buried high stress coal bunker support structure and its construction method

Abstract

A support structure for a large deep buried high stress coal bunker, comprising a coal bunker and a supporting device. The coal bunker is composed of a top chamber, an upper mouth section, a variable diameter section, a main body section, a locking section, a coal separating funnel and a coal feeder chamber. The dome of the warehouse roof chamber and the outer wall of the straight wall of the chamber are fixedly provided with anchor rod net spray support and anchor cable net spray support. The upper mouth section, the variable diameter section and the main section are fixedly provided with anchor, mesh, cable-sprayed support and two-layer reinforced concrete pouring support. The lock section is fixed with anchor net cable spraying support and three-layer reinforced concrete pouring support. The coal feeder chamber is fixedly equipped with anchor, mesh, cable spraying support and two-layer reinforced concrete pouring support. Compared with the stone masonry method, not only the construction period is greatly shortened, but also the phenomenon of exposed surrounding rock and unrealized filling behind the wall can be eliminated, empty-top operation can be avoided, labor intensity can be reduced, and the working environment can be improved. The effect is better.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to the technical field of underground deeply buried coal bunker support structures. Background technique [0002] Now with the continuous development of my country's coal industry and the continuous updating of mining technology and equipment, the efficiency of coal mining has been greatly improved. In order to ensure the continuous and efficient coal production of the entire production system, give full play to the maximum working capacity of the transportation and lifting equipment, and make the production run smoothly, it is essential to set up a large coal bunker with a certain capacity in the main underground transportation link. These coal bunkers are generally buried deep underground. The large coal bunkers located in the deep underground soft rock formations are important chambers of mines. They have the characteristics of large cross-sections and high stress in surround...

AI Technical Summary

Problems solved by technology

These coal bunkers are generally buried deep underground. The large coal bunkers located in the deep underground soft rock formations are important chambers of mines. They have the characteristics of large cross-sections and high stress in surrounding rocks. The pressure from the surrounding rocks can easily cause the coal bunkers to become unstable. destroy its structure and cause huge losses

[0003] At present, the commonly used deep soft rock large coal bunker reinforcement method often adopts a single reinforced concrete support or a few stable surrounding rocks use bolt net spray support. This support method has the following defects: due to the integrity of the deep soft rock Poor performance and stability, the traditional bolt net spray support can not strengthen the deep surrounding rock, and the single reinforced concrete support method, with the increase of the service life, the steel bar is easy to fall off due to corrosion, resulting in cracking and peeling of the protective layer ; and the above-mentioned construction structure is complex, and it is impossible to effectively reinforce the broken surrounding rock

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