A flexible curtain sealing device for roof cutting and roadway without coal pillars

Abstract

The invention discloses a flexible curtain sealing device for coal pillar-free roadway cutting, including a sealing mechanism for sealing the roadway when the roadway is retained along the gob, a supporting mechanism for providing support force for the sealing mechanism, and a driving sealing mechanism, The supporting mechanism is a lifting mechanism that moves up and down along the height direction of the roadway. The sealing mechanism includes a flexible curtain. The supporting mechanism includes a support frame and a support block arranged above the support frame. Contact, the bottom end of the flexible curtain is in contact with the roadway bottom plate, the lifting mechanism includes a lifting bracket, and the lifting bracket is arranged under the supporting frame and connected with the supporting frame. The invention has a simple structure, while the flexible curtain is lifted and arranged, it realizes the pressure effect on the roof of the roadway, which ensures that the roadway and the goaf are completely isolated and does not cross the wind, and the components in the invention can be repeated. Utilization greatly saves the cost of sealing.

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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