A method of retaining entry along the goaf with solid filling coal mining and building gangue walls

Abstract

The invention relates to a method of solid filling coal mining and building gangue walls along the goaf, which is to build a gangue wall on the side of the filling body in the goaf of the coal mining face, and pack the coal mine gangue into the gangue wall with woven bags or snakeskin bags. If it is full and built into a wall, the coal mine gangue can be directly filled with the gangue filling the coal mining face. Then, the gangue wall needs to be pre-prepared with single-layer metal mesh, "W"-shaped steel belt, ladder beam and double-ended threaded anchor rod. Tight support. As the working face continues to advance, this method can leave a complete gangue wall for the mining of the next working face. The roadway retaining method is simple and practical, has high support strength and low cost.

Description

technical field [0001] The invention relates to a gob-side entry retention method for solid filling coal mining piles and gangue walls, and is especially suitable for filling coal mining face without coal pillars and gob entry entry retention. Background technique [0002] With the gradual development of solid filling coal mining technology, the "three down" coal pressing has been liberated, the recovery rate of mine resources has been improved, and the needs of coordinated mining of resources and the environment in mining areas have been realized. However, the width of the roadway coal pillars between the upper and lower sections of the mining face in the filling coal mining is set to be 20-30m, which causes a large loss of coal resources and has become a bottleneck for improving the recovery rate of coal resources in the filling coal mining technology. Most of the existing gob-side retaining methods and related patented technologies are carried out on the basis of conventi...

AI Technical Summary

Problems solved by technology

However, the width of the roadway coal pillars between the two mining faces in the upper and lower sections of the filling coal mining is 20-30m, which has caused a large loss of coal resources and has become a bottleneck for improving the recovery rate of coal resources in the filling coal mining technology.

Most of the existing gob-side retaining methods and related patented technologies are carried out on the basis of conventional coal mining operations using roadside filling technology. The construction process is complicated and requires a lot of manpower and material resources. The interaction is very serious and the work efficiency is low

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