High-strength leakproof packing structure of gob-side entry retaining roadside and construction method thereof

Abstract

The invention discloses a high-strength leakproof packing structure of a gob-side entry retaining roadside and a construction method thereof. The high-strength leakproof packing structure is formed by closely piling and arranging gangue bags filled with packing materials. Steel bars with inter-row spacing of 700mm*700mm are uniformly and transversely hammered into the inner part of each gangue bag, the steel bars pass through the rear end part of each gangue bag to be exposed out from the inner part side of gob-side entry retaining, the length ratio of the hammered part and the exposed part of each steel bar is 8:1-10:1, and the exposed parts of all steel bars are mutually intertwined and fixed in one through iron wires. Cement plaster with thickness of 2.0cm is sprayed on the surface of each steel bar gangue bag intertwined by the iron wires. According to the high-strength leakproof packing structure, the defect that simple use is lower is overcome, and the defect that the leakproofness is poorer when a composite support with an upper layer of packing materials and a lower layer of packing materials is adopted is also overcome.

Description

technical field [0001] The invention relates to a filling technology applied in underground coal mines, in particular to a filling structure and a construction method beside a gob-side entry retention. Background technique [0002] Gobside filling and gob-side retention is a major reform of coal mining technology. This technology can not only increase the recovery rate of coal resources, extend the service life of mines, reduce the amount of roadway excavation, alleviate the contradiction of mining replacement, cancel the island working face and shorten the It is also the most effective way for mines to reform their coal mining methods. [0003] Gobside retaining requires a side filling structure with high strength and high airtightness. At present, the commonly used filling methods for gob-side entry retention at home and abroad mainly include gangue belt filling, paste filling, and high-water quick-setting material filling, etc. The support resistance provided by gangue b...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the technical defects of poor airtightness, serious air leakage and poor operability of the existing gob-side entry retaining filling technology, the present invention provides a new type of simple and easy-to-operate filling structure. The stable high-strength filling structure of gob-side entry retaining has good airtightness, which completely solves the technical defects of roadside support

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