Method for significant reduction of bracket support of gob-side roadway of fully-mechanized mining face

Abstract

The invention discloses a method for significant reduction of bracket support of the gob-side roadway of a fully-mechanized mining face, which solves the problems of the prior art. In the specific technological scheme, brackets are directly applied to support a roadway, each group of brackets are arranged continuously as a whole along a track gate and is more than 30-35 meters away from the advance face of the track gate, and the uninterrupted installation of the brackets is performed along with advancement in face exploitation; and when the advancement length in the face exploitation is 1.5-2.5 times longer than the face length, the brackets are withdrawn from the beginning of the air return roadway of the working area along the bracket withdrawing direction, and the withdrawn brackets are continuously arranged in the track gate along the bracket arranging direction so as to be recycled in the advance support of the mining face. The invention has the advantages that: the support strength is high, and the amount of reduced plungers is large, thereby reducing the roadway maintenance workload; the brackets can be recycled, and the removal and recovery of the brackets can be performed synchronously with the face mining without influencing the production; and the invention facilitates the rapid restoration of the roadway in tunneling construction.

Description

technical field [0001] The invention relates to a coal mining roadway support engineering method, in particular to a fully mechanized mining working face suitable for medium-thick coal seam mining using comprehensive mechanized operations. The top plate of the trough roadway realizes the gob-side entry retention along the trough. Background technique [0002] Gobside entry retention is to retain the transport entryway in the previous section as the return air entry entryway in the lower section by strengthening the support or side support. As a coal pillar-free roadway protection technology, gob-side entry retention is an effective way to reasonably develop existing coal resources and increase the recovery rate of coal resources; this method can greatly reduce the amount of mine roadway excavation and ease the mining process. It has obvious technical advantages and economic benefits to take over the tension, shorten the time for moving the working face, prevent fire and pro...

AI Technical Summary

Problems solved by technology

The supporting body of the side roadway has high strength and no compressibility, resulting in large deformation of the original roadway, reduced ventilation section, and heavy undercover workload

[0007] The above are the existing main methods of gob-side entry retaining support. The support brackets are all arranged in the direction of direction. These traditional methods all have "U"-shaped ventilation, cumbersome support process, poor support effect, and a lot of manpower. , high labor intensity, serious roadway deformation and difficulty in restoration construction

Images