Top caving type gangue filling hydraulic support and filling method

Abstract

The invention provides a caving type gangue filling hydraulic support and a filling method, the caving type gangue filling hydraulic support is composed of a top beam, a shield beam, a base, four stand columns connected between the top beam and the base, and a reverse four-bar linkage, the shield beam and the reverse four-bar linkage base are connected through a supporting oil cylinder, a straddle type platform connected with the base is arranged below the shield beam, and the straddle type platform is connected with the base. The platform is provided with a bottom-discharging type waste rock leaking scraper, and waste rock fills a goaf through waste rock leaking holes; for a top coal caving filling working face, a filling method of coal cutting, frame moving, forward pushing and sliding, gangue filling, coal caving and backward pulling and sliding is provided. The working resistance of the filling hydraulic support is large, the caving shield effectively encloses the caving rock blocks or coal blocks at the tail of the support, a safe enclosure space is provided for the straddle type platform and filling, and no filling or less filling can be achieved; the straddle type platform is adopted to support the bottom discharging waste rock leaking scraper, the width of the working face and the lower filling space can be increased, parallel mining and filling operation can be achieved, and the purpose that the same fully-mechanized mining filling working face can not be filled, can also be filled less and can be filled more quickly is achieved.

Description

technical field [0001] The invention relates to the field of gangue filling in coal mines, in particular to a roof caving type gangue filling hydraulic support and a filling method. Background technique [0002] Coal mines emit a large amount of gangue during production. The traditional method is to pile it directly on the surface to form the unique surface feature "buildings" of coal mines, that is, gangue hills. According to statistics, the accumulative stacked coal gangue currently exceeds 5 billion tons, and there are more than a thousand large-scale gangue dumps, and the accumulated amount is increasing at a rate of 150 to 200 million tons every year. However, coal gangue generated during coal production and processing not only occupies a large amount of land, but also causes spontaneous combustion, polluting the air and groundwater. With the tightening of environmental protection policies, the state has successively issued a series of gangue disposal and utilization p...

AI Technical Summary

Problems solved by technology

[0003] In view of the fact that in the prior art, the mechanized gangue filling of full-height full-mechanized mining needs to be connected to the roof, and when the meter level is not connected to the roof, the roof collapses and the rock blocks occupy the filling space, causing filling failure or even failure, and the coal mining speed is slow and the filling capacity is low when filling the roof. The output of gangue does not match the amount of coal and other problems, and the problem that comprehensive mechanized gangue filling cannot be realized during top-coal mining, the invention provides a top-caving gangue filling hydraulic support and a filling method, which meet the requirements of no filling, less filling, Four requirements for fast charging and top coal charging

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