Gob-side entry retaining method of a solid filling coal mining half-section one-leg shed

Abstract

The invention relates to a gob-side entry retaining method of a solid filling coal mining half-section one-leg shed, which comprises the steps of supporting the coal side and the top plate of a roadway entity, filling a gob with a coal mining filling hydraulic support and a fill mining conveyor behind a filling coal mining working surface, and then fixing a row of H-shaped steel with an anchor rod and an anchor rope at the 1 / 3 point of the distance from an end top plate of the working surface to the gob; with the forward movement of one pace of the coal mining filling hydraulic support, a metal net is paved and side-wall I-beams are bridged firstly on the outer side of the gob; simultaneously, a metal net is paved within 1 / 3 of the distance from the top plate to the gob, and then a stull I-beam is bridged so as to form a reverse L-shaped one-leg shed steel structure support body; and with the forward movement of the coal mining filling hydraulic support, the side wall I-beams are connected and fixed via steel bars, and one-leg shed steel structure support bodies are connected into sheets which are matched with the support of the coal side and the top plate of a roadway entity to realize the gob-side entry retaining of a filling mining work surface mining roadway. The method is simple, has high support strength and low cost, is implemented easily and has high efficiency.

Description

technical field [0001] The invention relates to a gob-side entry retention method of a solid-filled coal mining half-section single-leg shed, which is especially suitable for gob-side entry retention without coal pillars in a filling coal mining face. 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 ...

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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