A Coal Mining Method for Downward Gangue Filling with Soft Cover Support in Steeply Inclined Coal Seam

Abstract

The invention provides a gangue-filling coal mining method for a sharp inclined coal seam under flexible shield support. The method comprises the steps of distributing working faces corresponding zones in a downhill mining mode, dropping coal by adopting an air pick, supporting the working face by using the corresponding flexible shield support to form a working space, and filling gangues above the flexible shield support through the corresponding floor tunnel along with the gradual mining operation to a coal body which is positioned below the working face, so as to enable the corresponding flexible shield support to be sunk under the dead weight and the weight of the covered gangues and form a mode of mining while filling, wherein trenches are distributed in the working faces corresponding to the zones, workers work in the trenches, produced coal is pushed to inclined coal dropping roadways corresponding to the zones by a scraper bucket and drops into a coal bunker at the underside, and then the coal is transported to a mining area through a haulage roadway after being loaded in a mine car. The flexible shield support does not need to be removed and lengthened for multiple times during mining, the filling procedure is simplified, the filling cost is reduced and the labor intensity of workers is reduced.

Description

technical field [0001] The invention relates to a coal mining method for softly covering and supporting downward gangue filling in steeply inclined coal seams. Background technique [0002] As mine mining develops into deeper and more complex coal seams, the surrounding rock pressure of production working faces and roadways becomes more complex, the deformation is more serious, and the support is more difficult, which seriously affects the production safety of coal mines. Especially when mining the "three lower" coal seams, it is very important to increase the control of the roof. With the continuous development of mining technology, filling mining has been recognized and utilized by more and more coal mining enterprises, and has achieved good benefits. However, in some mines, the coal seam that is pressed into the coal seam belongs to the steeply inclined coal seam. The existing methods for mining the steeply inclined coal seam mainly include: the inverted step coal mining...

AI Technical Summary

Problems solved by technology

There are obvious deficiencies in the above two methods: first, the process is complicated, and many processes are required in the filling process, which is not easy to operate, and may even easily cause the mining area to collapse; second, the filling system is huge, and the initial investment is too high

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