Telescopic flexible die for gob-side entry retaining

Abstract

The invention provides a telescopic flexible die for gob-side entry retaining. The telescopic flexible die comprises three flexible die units including a flexible die A, a flexible die B and a flexible die C, wherein the flexible die A, the flexible die B and the flexible die C are integrally connected, a grouting hole A, a grouting hole B and a grouting hole C are respectively formed in the side walls of the flexible die A, the flexible die B and the flexible die C, a groove is formed in one side of the flexible die A, and the groove is matched with the flexible die C. The telescopic flexible die has the advantages of convenience in pouring and high use efficiency, an adopted telescopic flexible formwork can extend and retract as required, pouring materials are poured into the flexible formwork, the flexible formwork support speed is increased, the limitation of flexible formwork support on the stoping speed is relieved, material leakage is prevented, and the construction requirement is met.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a telescopic flexible mold for gob-side entry retention. Background technique [0002] In order to reduce the coal pillar loss between the coal mining section transportation and the wind-in trough, coal pillar-free mining is adopted, that is, the coal along the goaf is reserved along the trough to serve the mining face of the next section, which is called gob-side entry retention. The technology of retaining lanes plays an increasingly important role in the construction of modern mines. As the main component of the support system of gob-side entry retaining, the structural design of filling body beside gob-side entry retaining has always been a research hotspot in this field. The existing support technology generally uses filling, and the progress of the mining face and the construction quality of the gob-side entry are mutually restricted, resulting in a reduction in the ou...

AI Technical Summary

Problems solved by technology

The existing support technology generally uses filling, and the progress of the mining face and the construction quality of the gob-side entry are mutually restricted, resulting in a reduction in the output of the mining face, and the quality of the gob-side entry is difficult to guarantee. The quality of the roadway is reduced, resulting in hidden safety hazards in the gob-side roadway, and at the same time, it also increases the labor intensity and increases the production cost

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