Thin seam gob-side entry retaining filling method

Abstract

The invention discloses a thin seam gob-side entry retaining filling method. During extraction advance of a working face, single props are arranged in a region where entry retaining filling is to be performed following an end head bracket on the entry retaining side of the working face, gangue block treatment is performed, row spacing is performed according to design, and roof support anchor rods are timely constructed; when the to-be-filled length behind the bracket reaches a filling step pitch, log point columns are arranged to replace the single props; after a temporary support space reaches primary filling length, a wood board is nailed on the inner side of the log point columns; and except that a filling port is reserved, the wood board is required to be tightly nailed from a bottom plate to a top plate, then an anti-static flame-retardant canvas or air tubing cloth layer is laid in the wood board to form a filling formwork, next a filling material is filled into the filling formwork, and the formwork is advanced and moved forwards along with the working face after the initial setting strength of a to-be-filled body meets the requirements. The method has the advantages of simple filling process requirements, easiness in operation, small amount of labor and no influence on progress of extraction work.

Description

technical field [0001] The invention relates to a method for filling a filling in an underground mining area of ​​a coal mine, in particular to a filling method for two hard and thin coal seams along gob-side entry. Background technique [0002] As an important coal production base in the world, my country has made major breakthroughs in fully mechanized mining and fully mechanized caving mining in thick coal seams, and is in an international leading position. However, fully mechanized mining in thin coal seams is a relatively weak link. The main objective reason is that a large number of thin coal seam coal resources are put on hold due to the small space, low efficiency, high labor intensity of workers, many safety accidents, and low economic benefits in thin coal seam mining. Far lower than the proportion of reserves, and there is a downward trend. One of the key factors is that the thin coal seam roadways are mostly semi-coal and rock roadways, the roadway excavation ra...

AI Technical Summary

Problems solved by technology

However, the currently used gob-side entry retention technology generally has th

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