Gob-side entry retaining method using prefabricated walls

Abstract

The invention relates to a support method for anthracitic column mining roadside gob-side entry retaining, in particular to a gob-side entry retaining method using prefabricated walls. The technical method includes the steps: a, fixing a prefabricated wall template on one side of a roadway; b, filling concrete into the template preliminarily fixed on one side of the roadway in advance, and forming a concrete wall module with high force bearing capacity after solidification; c, dragging the prefabricated wall module to a roadside support position close to a gob in the roadway; d, adjusting the wall module to form support walls; and e, casting a gap between the adjacent walls with sealing materials to form walls with good integral tightness, and casting a sealing layer above the concrete walls to fill a connecting gap between a roadway top and each wall. One-step construction area is large, the formed concrete walls are fine in integrity, high in strength and excellent in sealing effect, and the method has outstanding superiority in both economic and social benefits.

Description

Technical field [0001] The invention relates to a supporting method for retaining a roadway along the goaf next to a coal-pillar mining roadway, in particular to a method for retaining a roadway along the gob using a prefabricated wall. Background technique [0002] To ensure safe production at the coal mining face, at least two roadways are required, one for the air inlet and the other for the return air. Usually, coal pillars are set between adjacent working faces to ensure the effect of roadway support and isolate harmful gases in the goaf. In order to recover the security coal pillars left in the traditional mining method, certain technical means are adopted to re-support the troughs of the previous section for use in the next section. This way, the original troughs are retained along the edge of the goaf. The method of retaining lanes is called retaining lanes along the goaf. The basic method of retaining lanes along the goaf is to maintain the conveyor lane or return air...

AI Technical Summary

Problems solved by technology

[0003] Traditional roadside support methods such as dense pillars and wooden piles are difficult to fully isolate the goaf in gob-side entry retention, and it is difficult to effectively connect the roof with rigid material walls. Low strength, high shrinkability, difficult to solve the problem of air leakage

Although stone-built walls, prefabricated concrete block walls, and cast-in-place concrete walls have good airtightness, they have a long solidification period and low initial wall support capacity, which cannot achieve a good support effect; at the same time, wall construction and work Face production interacts for a long time, and the progress of the project is slow, which seriously affects the advancement speed of the working face

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