Flexible curtain sealing device for non-pillar roof-cut entry

Abstract

The invention discloses a flexible curtain sealing device for a non-pillar roof-cut entry. The device comprises a sealing mechanism for sealing the entry during gob-side entry retaining, a supporting mechanism for supplying supporting force to the sealing mechanism, and a lifting mechanism for driving the sealing mechanism and the supporting mechanism to lift in the height direction of the entry, wherein the sealing mechanism comprises a flexible curtain fabric; the supporting mechanism comprises a supporting frame, and a supporting block which is arranged above the supporting frame; the top end of the flexible curtain fabric encloses the supporting block and clings to a top plate of the entry to achieve contacting; the bottom end of the flexible curtain fabric clings to a bottom plate of the entry to achieve contacting; the lifting mechanism comprises a lifting bracket; the lifting bracket is arranged below the supporting frame and is connected to the supporting frame. The flexible curtain sealing device is simple in structure, and achieves the complete yielding effect for the pressure of the top plate of the entry while lifting and hanging the flexible curtain fabric, so that the entry and a gob can be completely isolated and free of cross wind; in addition, all components of the device can be recycled, so that the sealing cost can be greatly saved.

Description

technical field [0001] The invention relates to a sealing device for gob-side entry retention without coal pillars, in particular to a flexible curtain sealing device for top-cutting roadway formation without coal pillars. Background technique [0002] A large amount of coal resources are wasted by the mining method of traditional coal pillar protection roadway, and a large amount of compressive elastic energy is accumulated on the coal pillar, which is easy to cause dynamic disasters such as rock burst, coal and gas outburst, etc. Therefore, the coal pillarless mining technology is The direction of coal mining development. The coal-pillar-free roof-cutting technology adopts blasting and pre-split direct roofing. Under the stope cycle pressure, the direct roof sinks to the bottom to form the roadside, which isolates the goaf, realizes coal-pillar-free mining, and improves the stope surrounding stress distribution. After the roof is cut without coal pillars to form a roadwa...

AI Technical Summary

Problems solved by technology

In order to ensure that the roadway is completely isolated from the goaf and does not cross the wind, the traditional method often needs to use channel steel to reinforce the side of the roadway, and then inject a large amount of grout into the side of the roadway, which not only wastes a lot of manpower and financial resources, but also may affect the normal succession of the working face program

[0003] The use of flexible flame-retardant curtains to seal roadways is a simple and effective means of roadway sealing. However, according to the analysis of on-site construction, the current technical bottleneck of using flexible curtains to seal roadways is that there is no special device for lifting and hanging flexible curtains. The pressure on the roof of the roadway can be completely yielded while being arranged; it is difficult to achieve complete sealing for the roadway with a large roof undulation; the sealing device cannot be recycled, and the sealing cost is high

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