Cover retracement method of dense steel wire ropes of coal face

Abstract

The invention discloses a cover retracement method of dense steel wire ropes of a coal face, and is suitable for the retracement operation of the coal face. When the coal face is propelled to approach a stop line, a coal cutter is stopped after cutting from head to tail, and only cuts off a roof; anchor rods are mounted in drifts at the two sides of the coal face beforehand; plastic steel nets are laid between top beams of hydraulic brackets and the roof before steel wire ropes are put in; the laying is performed bracket by bracket from top to bottom; and the two ends of the steel wire ropes are respectively fixed on the anchor rods by clamps. The hydraulic brackets forwards move along with the propelling of the coal face; the plastic steel nets are continuously laid to the stop line; and the dense steel wire ropes and the plastic steel nets form a barrier to stop the emission of gangues in a gob, so that the labor intensity of workers is reduced, and the retracement efficiency of the coal face is improved; the steel wire ropes are applied to simplify the anchor rod support of the roof and to protect the plastic steel nets from being damaged by large gangues; the main sources of the steel wire ropes are underground waste steel wire ropes to achieve the secondary utilization; the normal stoping is not influenced by the laying procedure; and the method has the advantages of easy construction, simple method, low cost and high safety.

Description

Technical field [0001] The invention relates to a method for retreating a working face, in particular to a method for retreating dense steel wire rope shielding on a working face. technical background [0002] During the advancing process of the working face, the stoping space is always in the supporting structure system jointly constructed by "coal wall-working face support-goaf falling gangue". The gangue falling from the goaf will slide downward along the bottom plate under the action of gravity and rush into the working face, threatening safe production. Move when the working face advances to the stop line position. The support is usually withdrawn from bottom to top or from top to bottom. After the support is withdrawn, the rear gangue suddenly floods into the work due to lack of support. Face space, this will not only cause the metal mesh to be damaged by the impact of large gangue, and seriously threaten the life safety of workers, it will also change the stress state of ...

AI Technical Summary

Problems solved by technology

When the working face advances to the position of the production stop line, the move is carried out. The support is generally withdrawn from bottom to top or from top to bottom. After the support is withdrawn, the gangue suddenly pours into the work due to lack of support This will not only cause the metal mesh to be damaged by the impact of large pieces of gangue, which will seriously threaten the safety of workers, but also change the stress state of adjacent supports, causing the supports to fall, and seriously affecting the withdrawal efficiency of the working face.

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