'Reinforced concrete-hydraulic' roadway-side supporting device and method for deep roadway

Abstract

The invention discloses a 'reinforced concrete-hydraulic' roadway-side supporting device and method for a deep roadway. A baffle is arranged on the upper part of a cavity of a lower brace, an upper brace is arranged in a cavity of the lower brace and above the baffle, a lifting cavity is formed by the lower end of the upper brace and the lower brace above the baffle, an emulsified liquid injection opening is formed in one side of the lifting cavity, a three-purpose valve is arranged on the emulsified liquid injection opening, the upper brace is connected with the lower brace through a connecting mechanism, and a windshield partition is arranged between the supporting device and a goaf. By the novel supporting device and method, high-strength supporting of the concrete-filled steel tube brace and a constant-resistance yielding function of the single hydraulic brace can be combined well, so that the supporting device simultaneously has main advantages of two devices, meanwhile, broken gangue and poisonous and harmful gas of the goaf can be efficiently and safely isolated, the purpose of forming the roadway quickly and effectively is achieved, and therefore, the 'reinforced concrete-hydraulic' roadway-side supporting device and method are suitable for roadway-side supporting projects under the state of high stress of a deep part.

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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