Method for constructing gob-side entry retaining roadside support based on gangue cement-based material

Abstract

The invention discloses a method for constructing a gob-side entry retaining roadside support based on a gangue cement-based material, and relates to the technical field of underground gob-side entryretaining roadside supports. The method comprises the following steps: firstly, arranging single props in a gangue transportation roadway, and arranging baffles beside the single props; secondly, starting filling equipment, and sequentially filling a gob with gangue from far to near; thirdly, when a filling body is close to the gob at an entry retaining position, filling and tamping a cementing body; and finally, after a filled wall body is fully solidified and stabilized, recovering a part of or all single props and hinged top beams in a row in the middle of the entry retaining. The method issuitable for a solid filling working surface; gob-side entry retaining is performed by a method of combining the single prop baffles and the tamped cementing body for retaining the roadway; the single props support the hinged top beams or steel beams to achieve a temporary support effect and maintain the stability of the roadway; after the cementing material is tamped, an effect of quickly improving the support strength can be achieved, and the time for waiting for final setting during cementing filling is shortened; and the initial bearing capacity is high, and the entry retaining effect isgood.

Description

technical field [0001] The invention relates to the technical field of support for gob-side entry retaining in underground mines, in particular to a method for constructing a support body for gob-side entry retaining based on gangue cement-based materials. Background technique [0002] Gobside retaining is to keep a roadway with reasonable roadside support technology and roadside support technology, and use it as the next working face normally, which has the advantages of improving resource recovery rate, alleviating the tension of mining replacement, and providing space for gas control, etc. . [0003] However, because gob-side retaining needs to withstand multiple mining impacts, especially the breaking, rotation and sinking of the roof, the roadway usually produces large deformations. Therefore, how to use gangue in the goaf to support the roof, reduce the sinking and breaking of the roof, thereby reducing the deformation of the roadway, and effectively support the roof ...

AI Technical Summary

Problems solved by technology

However, this method uses paste filling or high-water filling to set up a layer of filling belt, which is complicated in process and cannot be used on solid filling working faces; moreover, it takes time for the paste and high-water filling to solidify, and it is difficult to form a supporting force in the early stage , the control effect on the roof is poor

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