Pre-dug large-section gob-side entry retaining roadway with columns built in roadway and construction method thereof

Abstract

The invention discloses a pre-dug large-section gob-side entry retaining roadway with columns built in the roadway. The roadway is arranged between a to-be-mined working face and an adjacent working face. Pier columns are built along the trend, wherein a to-be-mined working face coal cutting roadway and a reserved roadway are formed on the two sides of the pier columns, the to-be-mined working face coal cutting roadway is close to the to-be-mined working face and meets the coal cutting requirement of the to-be-mined working face, the width is 1-2 m, and the reserved roadway is close to the adjacent working face, serves the to-be-mined working face and the adjacent working face and meets the auxiliary material transportation requirement and the width is 3-5 m. According to the roadway, thepurpose of gob-side entry retaining can be achieved by utilizing the pre-dug large-section in-roadway building columns, and parallel operation of gob-side entry retaining roadway construction and working face stoping is achieved and the defect that working face advancing speed is affected by roadway retaining construction is overcome.

Description

technical field [0001] The invention relates to a pre-excavated large-section roadway with pillar-laying and gob-side retention roadway. Background technique [0002] With the continuous improvement of the degree of mechanized coal mining in coal mines, the comprehensive mechanized coal mining method is generally adopted in the working face. In the main coal-producing areas of my country, with the advantage of natural geological conditions, the advancing distance of the working face is getting longer and longer, and the preparation period is also increasing. . In order to solve the problem of continuous tension in the working face and improve the resource recovery rate, in recent years, the technology of retaining roadways along the goaf has been developed in the field of coal mining. [0003] However, there are many problems in the current gob-side retaining roadway technology, which are mainly manifested in: the construction of retaining roadway seriously affects the produ...

AI Technical Summary

Problems solved by technology

[0003] However, there are many problems in the current gob-side retaining roadway technology, which are mainly manifested in: the construction of retaining roadway seriously affects the production efficiency of the working face; it takes a long time for the filling of the retaining roadway to reach the design strength, resulting in intense construction work and low construction efficiency, which cannot meet the requirements The rapid advancement of demand in the working face restricts mine output; for deep, soft rock, impact, high gas mines, etc., the construction of gob-side entry roadway is located in the goaf at the back of the working face, and there are certain safety risks

[0004] To sum up, there is currently no gob-side retaining roadway technology that has a small impact on the production efficiency of the working face, can meet the high-production requirements of the working face, and is safe.

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