Method for filling gob

Abstract

The invention provides a method for filling a gob. In the filling process, when filling paste arrives at the position of an elastic baffle, a pushing device which is arranged on a tail beam of a hydraulic support pushes and pulls the elastic baffle back and forth to ensure that the filling paste refills the gob after being pushed to the gob which is not filled fully behind the hydraulic support; the pushing device is hinged with a pushing jack at the left end of the tail beam of the hydraulic support; the right end of the pushing jack is connected with the elastic baffle; and the filling paste is formed by uniformly mixing coal gangue, coal ash, a cementing material and water in the mass percent ratio of 45:20:15:20. According to the method, the pushing device which is arranged on the tail beam of the hydraulic support has a simple structure and is convenient to operate; and according to particle sizes and different ratios of components, the materials of the filling paste are convenient to transport and control, are condensed quickly and have certain expansibility and a good roof-contacting effect to ensure that surface subsidence can be effectively controlled.

Description

technical field [0001] The invention relates to a filling method in the filling mining method, in particular to a method for filling goafs in the filling mining. Background technique [0002] The filling method in the existing filling mining method, such as the publication number CN101881180A, is a "coal mine working face like paste filling method and slurry blocking device", which is to install a slurry blocking device on the cutting top row of pillars in the working face , start filling until the filling height of the paste-like body is consistent with the height of the slurry curtain, and the height of the goaf will be filled; after filling is completed, when the paste-like body is semi-solidified and does not sag, the coal mining will be carried out in a cycle; and then recycled The slurry retaining device is retracted to cut the top row of pillars; after the working face reaches a filling step, the cycle is carried out according to the aforementioned process. However, ...

AI Technical Summary

Problems solved by technology

However, due to the inappropriate selection and proportion of the paste material and the high mass fraction of the slurry, the filling pipe is easily blocked

[0007] In the above-mentioned existing filling methods, the filling equipment and filling materials used each have different deficiencies, and cannot realize the full space required for filling. Therefore, a filling equipment is invented, and the filling materials are reconfigured, and The improvement of the filling process has become an urgent problem to be solved to solve the imperfect filling in the level road mining

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