A side sealing device for gob-side entry retention and its application method

Abstract

The invention discloses a roadside sealing device for retaining a gob-side roadway, which comprises a sealing mechanism for sealing the tunnel roadway, a supporting mechanism for providing a supporting force for the sealing mechanism, and an elevating mechanism for driving the sealing mechanism and the supporting mechanism to perform lifting movements. The sealing mechanism includes a flexible cord, and the supporting mechanism includes a bracket and a support block. The top end of the flexible cord wraps around the support block and is in contact with the roadway roof, and the bottom end of the flexible cord is in contact with the roadway bottom plate. The invention also discloses an application method of the above-mentioned roadside sealing device for gob-side roadway retention. In this method, before the mining of the coal face to be mined, the advance directional blasting is directly carried out, and then along the length direction of the roadway along the ditch. Multiple sets of connected sealing mechanisms, supporting mechanisms and lifting mechanisms are arranged in sequence. The invention ensures that the roadway is completely isolated from the goaf without crossing wind, the roadway has good sealing effect, and all relevant parts of the sealing mechanism and the supporting mechanism can be recycled, thereby saving the sealing cost.

Description

technical field [0001] The invention belongs to the technical field of roadway sealing, and in particular relates to a roadside sealing device for goaf retention and an application method thereof. 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 roadway, the key to the success ...

AI Technical Summary

Problems solved by technology

[0004] 1. There is no special device to lift and hang the soft curtain while realizing the full pressure effect on the roof of the roadway;

[0005] 2. It is difficult to achieve complete sealing for the roadway with large undulating roof;

[0006] 3. The process of installing the sealing device is complex;

[0007] 4. The sealing device cannot be fully recycled, and the sealing cost is high

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