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A roadway support system and method for gob-side entry retention in three-soft coal seam mining without coal pillars

A technology with three soft coal seams and no coal pillars, which is applied to mine roof supports, mining equipment, earthwork drilling, etc. Difficulty and labor intensity, long maintenance-free period, and improved maintenance period

Active Publication Date: 2022-03-18
SHAANXI COAL & CHEM TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the technical problems existing in the prior art, the present invention provides a gob-side entry retaining support system and method in three-soft coal seam mining without coal pillars to solve the difficulty of the existing gob-side entry retaining support process. Technical Problems of Difficult Maintenance of Roadway Section

Method used

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  • A roadway support system and method for gob-side entry retention in three-soft coal seam mining without coal pillars
  • A roadway support system and method for gob-side entry retention in three-soft coal seam mining without coal pillars
  • A roadway support system and method for gob-side entry retention in three-soft coal seam mining without coal pillars

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Embodiment

[0054] This embodiment takes the test mine located in the Weibei mining area as an example:

[0055] The pilot mine is located in the Weibei mining area, which belongs to the three-soft coal seam. The existing gob-side entry retaining technology without coal pillar mining has no obvious effect, the roadway section is difficult to maintain, the volume of the bottom drum is large, and the support body in the roadway, such as ordinary monomer , The damage rate of U-shaped steel gangue column is high, the supporting effect is difficult to guarantee, and the construction is difficult.

[0056] In view of the current situation of the existing three-soft coal seam without coal pillar goblind roadway support, this embodiment provides a three-soft coal seam without coal pillar mining goblin On the basis of the original anchor net and cable support 15, special strengthening support measures are adopted, and it has the effects of high support strength and high safety for the roof and flo...

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Abstract

The invention discloses a roadway support system and method for gob-side entry retaining in three-soft coal seam mining without coal pillars. The beams are evenly arranged in the lagging roadway, and single pillars are arranged under the first and second π-shaped beams; several gangue-retaining pillars are evenly spaced in the lagging roadway, and are set close to the side of the gob; One side of the empty area is provided with a gangue-retaining net; the side wall roof of the advanced roadway is provided with a row of locking anchor cables, and the locking anchor cables are located on the side of the coal wall of the working face; For the strengthened support of the side roof of the goaf, the sinking of the roof is controlled in advance; the combination of π-shaped beams and single pillars is used to realize the support of the roof of the roadway with large support resistance; The gangue net can effectively control the lateral pressure and drum of the gangue gangue; the invention can effectively control the rotation and sinking of the roof of the roadway and the deformation of the roadway.

Description

technical field [0001] The invention belongs to the technical field of underground roadway support and rock formation control in coal mines, and particularly relates to a gob-side roadway support system and method for mining without coal pillars in three-soft coal seams. Background technique [0002] The three-soft coal seam refers to the coal seam in which the roof strata, main coal seam and floor strata encountered in the underground mining of coal mines are all soft strata. The three-soft coal seam has developed fissures and complex structures. It is particularly difficult to control the surrounding rock of the roadway; with the popularization of gob-free roadway mining, no matter what kind of mining method without coal pillars, it will take a certain amount of time for the overlying rock to be stable and the gangue to be compacted in the goaf. , the existing gob-side entry retaining support technology is difficult to meet the support requirements, and the support of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D23/04E21D23/03E21D23/16
CPCE21D23/04E21D23/0409E21D23/03E21D23/16
Inventor 蔚保宁王翔宇李亮刘效贤侯挺黄克军
Owner SHAANXI COAL & CHEM TECH INST
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