Gob-side entry retaining process for solid-filling, coal-mining and laying gangue wall

Abstract

The invention relates to a gob-side entry retaining process for solid-filling, coal-mining and laying a gangue wall. The gangue wall is laid at one side of a filling body in a gob on a filling and coal-mining surface and is laid into a wall body by filling gangues in a coal mine into a woven bag or a plastic woven bag to form a mining roadway on a next working surface. The specific process comprises the following steps of: cutting coals by a coal mining machine-moving a frame-pushing a scraper conveyer at the front part for one step distance-closing down and locking; and carrying out temporary supporting to the two ends-packaging a gangue bag and laying the gangue wall-carrying out prestressed supporting to a metal net, a W-shaped steel belt, a ladder beam, a double-head anchor rod with threads-hanging a wind curtain-filling the gob-entering a next circulation. The invention has the beneficial effects that the gob-side entry retaining process is effectively matched with a working surface coal mining and filling process; the operation and the implementation on the filling and coal-mining working surface are easy, and the gob-side entry retaining process is safe and reliable.

Description

technical field [0001] The invention relates to a gob-side entry retention technology for solid filling coal mining piles and gangue walls, and is especially suitable for gob entry retention without coal pillars in filling coal mining working faces. 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 co...

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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