A gangue bag filling method for wide roadway excavation in thin coal seam under hard roof

Abstract

The invention discloses a gangue bag filling method in thin coal seam wide roadway tunneling under a tight roof. A roadway is tunneled along a coal seam in the roadway tunneling process, and the initial cross section of the roadway is 3.4m wide and 2.5m high; while tunneling the roadway, rock bolting is conducted in a manner that rock bolts are stroke into the roof, the floor and the two sides of the roadway and diamond metal nets are hung for bolting; when the roadway is tunneled for 6m on the basis of the dimension of the initial cross section, the roadway is expanded at the two outer sides of the roadway along the coal seam to form a stowboard; after that, the roadway and the stowboard are alternately tunneled and advance circularly; the coal extracted from the roadway is transported to the ground while the dug-out gangue is transported to the stowboard to be bagged off, thereby forming gangue bags; and the gangue bags are piled up and built in the stowboard in a manner that the gangue bags are firmly connected with the roof of the coal seam and are flush with the wall of the stowboard.

Description

technical field [0001] The invention relates to an underground filling method of a coal mine, in particular to a filling method using a gangue bag when excavating a wide lane under a hard roof of a thin coal seam coal mine. Background technique [0002] my country's coal production is dominated by underground mining, and roadway excavation and support have always been an important part of coal mine production. In coal mine production, roadway excavation has become a key technology for efficient and intensive production in coal mines. In thin coal seam mining, semi-coal rock roadway excavation accounts for about 20% of the total excavation work volume, and a large amount of gangue will inevitably be produced during the excavation process. At present, gangue has always been processed by transporting it to the ground, so that it will accumulate in large quantities on the ground to form a gangue hill, which will bring serious pollution to the environment of the mining area. ...

AI Technical Summary

Problems solved by technology

At present, gangue has always been processed by transporting it to the ground, so that it will accumulate in large quantities on the ground to form a gangue hill, which will bring serious pollution to the environment of the mining area.

Images