Very soft coal seam hydraulic support

A technology of hydraulic support and soft coal seam, which is applied in mine roof support, mining equipment, earthwork drilling and mining, etc., can solve the problems of poor safety, inability to realize mechanized mining, low efficiency, etc., and achieve the effect of efficient operation

Inactive Publication Date: 2016-07-06
CHINA COAL BEIJING COAL MINING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The coal mining method in the prior art cannot realize mechanized mining, and has low efficiency and poor safety

Method used

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  • Very soft coal seam hydraulic support
  • Very soft coal seam hydraulic support
  • Very soft coal seam hydraulic support

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0017] The preferred embodiment of the extremely soft coal seam hydraulic support of the present invention is:

[0018] Including the top beam, the front part of the top beam is provided with a telescopic beam, the front end of the telescopic beam is provided with an extended beam, and the rear part of the support is provided with a bottoming sealing device, and the front end of the extended beam is inserted into the coal mine during the working process. intramural.

[0019] Positioning bolts are arranged between the extended beam and the telescopic beam, and matching stressed keys and key slots are also provided.

[0020] The bottom-touching sealing device includes a tail beam, and the tail beam is provided with a movable side guard plate and a plate-inserting mechanism, and the lower end of the plate-inserting mechanism is lower than the bottom surface of the bracket when it is extended to the maximum.

[0021] The base of the bracket is provided with a push mechanism, and ...

specific Embodiment

[0033] Such as figure 1 , Figure 2a , Figure 2b As shown, the front part of the top beam is provided with a telescopic beam, and the front end of the telescopic beam is provided with an extended beam, which is assembled and welded by steel plates, and the size is determined according to the supporting equipment.

[0034] Such as image 3 As shown, the extended beam and the telescopic beam are fixed by bolts and the keyway is stressed, and the extended beam is extended and retracted by the telescopic jack along with the telescopic beam.

[0035] In order to ensure sufficient supporting force at the tip of the extended beam, in addition to sufficient working resistance, set the balance adjustment force far greater than that of the general support, such as using two large-bore balance jacks.

[0036] Such as figure 1 As shown in Fig. 1, the rear of the bracket is equipped with a tail beam inserting mechanism similar to the top-coal caving support. The tail beam is the same ...

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Abstract

The invention discloses a hydraulic support for extremely soft coal seams, which comprises a top beam, a telescopic beam is arranged at the front of the top beam, an elongated beam is arranged at the front end of the telescopic beam, and a bottom-touching sealing device is arranged at the rear of the support. The front end of the extended beam is inserted into the coal wall. Positioning bolts are arranged between the extension beam and the telescopic beam, and matching stressed keys and key slots are also arranged. The bottom-touching sealing device includes a tail beam, and the tail beam is provided with a movable side guard plate and an inserting plate mechanism, and the lower end of the inserting plate mechanism is lower than the bottom surface of the support when the inserting plate mechanism is stretched out to the maximum. The bottom of the push bar of the base push mechanism is provided with two scrapers. The power of the support jack is used to support the inner plate of the coal wall, and the side of the old pond is completely sealed with the tail beam plate, which can realize safe and efficient operation on the working face of the extremely soft coal seam.

Description

technical field [0001] The invention relates to a hydraulic support for coal mines, in particular to a hydraulic support for extremely soft coal seams. Background technique [0002] At present, there are a large number of extremely soft coal seams in many places, the coal hardness f is only about 1, and the coal seam joints are well developed, which is difficult to mine. Now these coal mines can only use manual coal mining. The coal mining methods are as follows: [0003] The working face is supported by brackets or monomers or row beams, and transported by a scraper machine. The coal wall and the old pond are sealed with wooden boards or bamboo rafts, etc., and holes are dug near the top of the coal wall, and the slats are plugged, and then the seal is removed. The slats, the coal collapses and flows out, and the coal is discharged section by section or at intervals, and is transported out with a scraper machine. [0004] The coal mining method in the prior art cannot real...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): E21D23/16E21D23/04
Inventor孙如钢刘国柱李传明钱洋喜包冬生胡春华吕金龙王小飞
OwnerCHINA COAL BEIJING COAL MINING MACHINERY