Non-roadside supporting gob-side entry retaining process

Abstract

The invention discloses a non-roadside supporting gob-side entry retaining process comprising the following processing steps: 1) additionally constructing anchor rods, anchor craning beams and side anchor craning beams and mounting metal mesh in an entry to be retained in front of the stope face, wherein, one end of the metal mesh is fixed on the entry top which is 0.4m from the stope face side through the anchor rods, and the anchor cable of each anchor cable beam is anchored on the stable layer of a coal seam roof; 2) laying the metal mesh on a head beam of a support on a fully-mechanized face, mounting Pi-shaped steel legs and roof-cutting mono-blocks on the edge of a gob area at the back of the support, and mounting mono-blocks in the entry at the same time; 3) carrying out the roof-cutting with the roof-cutting mono-blocks, then, the immediate roof of the gob area is fully broken down, and the metal mesh is compacted on the floor by the broken gangue, so as to form a 'mesh-gangue' wall; and 4) withdrawing mono-blocks of roof-cutting mono-blocks in the retained entry and part in the later period of stoping, so as to form a stable cantilever beam structure. The invention is characterized in that the roof of the entry is supported mainly by an anchor cable, an anchor net and the 'mesh-gangue' wall to form and retain the stable cantilever beam structure. The process has the advantages of simple operation, high construction efficiency and speed, low impact on the working surfaces, low cost, safety and reliability, therefore, the process has wide practicability.

Description

technical field

[0001] The invention relates to a gob-side entry retaining process without roadside support, which is suitable for roadway retention along the roadways with medium-thick and thin coal seams, coal seam roofs of Class III and above, and adopting anchor cables and anchor nets for support. Leave the alley empty. Background technique

[0002] Coal is the most important primary energy in our country. In order to reduce the loss of coal pillars between the transportation lane and the air return lane in the coal mining section, increase the recovery rate of coal resources, reduce the amount of roadway excavation, and alleviate the tense situation in the production process of coal mines , Coal enterprises adopt the promotion of mining without coal pillars, that is, carry out roadway retention along the gob. Gobside entry retention is to preserve and maintain the roadway during the mining of the working face for use in the mining of adjacent mining faces. Gobside ret...

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