A "steel-concrete-hydraulic" roadside support device and support method for deep roadway

Abstract

The invention discloses a "steel-concrete-hydraulic" roadside support device and support method for deep roadways. A baffle is arranged on the upper part of the cavity of the lower pillar, and an upper part is arranged in the cavity of the lower pillar above the baffle. The pillar, the lower end of the upper pillar and the cavity of the lower pillar above the baffle form a lifting chamber, and an emulsion injection port is provided on one side of the lifting chamber. The connection mechanism is connected, and a windshield curtain is set between the support device and the goaf to isolate it. The new support device and support method well combine the high-strength support of the steel pipe concrete pillar with the constant resistance and yielding function of the single hydraulic prop, so that it has the main advantages of the two devices at the same time, and can be efficient and safe at the same time. The ground isolates the broken gangue and toxic and harmful gases in the goaf to achieve the purpose of fast and efficient roadway formation, so it is more suitable for roadside support projects in deep high-stress states.

Description

technical field [0001] The invention relates to the field of roadway support for "coal pillarless" mining in deep coal mines, in particular to a "steel-concrete-hydraulic" roadside support device and method for deep roadways. Background technique [0002] The current pillarless mining system of coal mines mainly includes two technologies of gob-side entry retention and gob-side entry. The roadway is arranged along the edge of the goaf, which can effectively avoid or weaken the influence of fixed support pressure, and can significantly improve roadway maintenance. State, reduce coal loss, increase coal recovery rate and reduce roadway excavation rate, the technical and economic benefits are very significant. [0003] Regardless of the gob-side entry retention technology or the gob-side entry small coal pillar protection technology, it is necessary to erect a reasonable roadside support body on the side of the goaf to support the roof and isolate the goaf. Traditional roadsid...

AI Technical Summary

Problems solved by technology

According to the above analysis, most of the main roadside support methods listed above have insufficient support resistance, such as gangue walls, dense pillars and single hydraulic pillars, etc.; the constant resistance yielding characteristics are poor, such as concrete filling walls, steel pipe concrete pillars, etc.; and Disadvantages such as complicated construction technology and high cost, such as high-water material filling body, etc., cannot meet the requirements of roadside support in deep "no coal pillar" mining

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