A Mining Method of Gob-along Small Section Roadway Retaining

A mining method and small-section technology, applied in ground mining, earth drilling, underground mining, etc., to achieve the effects of wide application range, accelerated construction speed, and simple operation

Inactive Publication Date: 2016-04-20
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Technical problem: The purpose of this invention is to solve the problems existing in the current mining method without coal pillars, and to provide a small-section roadway retaining method along the goaf. The cross-section of roadway retention in coal reduces the difficulties caused to underground ventilation and transportation, so as to realize safe and efficient mining

Method used

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  • A Mining Method of Gob-along Small Section Roadway Retaining
  • A Mining Method of Gob-along Small Section Roadway Retaining
  • A Mining Method of Gob-along Small Section Roadway Retaining

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Embodiment Construction

[0017] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0018] Such as figure 1 , figure 2 As shown, in the mining method for retaining roadway with small section along the goaf of the present invention, when arranging the working face of the upper section, the transportation lane of the working face of the upper section is supported by anchor rods (cables); behind the working face of the upper section, the anchor Inside the transport roadway in the upper section supported by rods (cables), that is, in the transport roadway 1 after the mining of the working face 2 in the upper section, the top filling wall 4 in the roadway is built along the side of the goaf 3. When filling, ensure that The filling wall 4 connected to the roof in the roadway is closely connected with the roof and floor of the roadway; the filling wall 4 connected to the roof in the roadway is set at a distance of L from the coal wall of the m...

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Abstract

The invention discloses an exploitation method of gob-side entry retaining with a small section. A small-section roadway is formed along a goaf by connecting a top filling wall inside a reserved lane when an upper zone working surface is recovered; the small-section roadway is expanded when a lower zone working surface is recovered. The small-section roadway reserved by the method is easy to maintain, the integrity of a carrier plate can be ensured, the problem that an upper-corner gas on the upper zone working surface is easily accumulated and exceeds the limit can be solved by virtue of ventilation of the small-section roadway when coal mining without pillars is performed, and the recovery ratio of coal resources and the safety of the recovery operation are improved.

Description

technical field [0001] The invention relates to a mining method for retaining entry with a small section along the gob, and is especially suitable for longwall mining working faces and coal mining working faces with relatively poor roof conditions in underground coal mines. Background technique [0002] In the mining of modern underground coal mines, the comprehensive mechanized longwall coal mining method is mostly adopted, and a 20-30m protective coal pillar is generally left between two adjacent working faces. When the coal pillar is recovered according to the current mining technology, the recovery rate is extremely high. Low, resulting in a large amount of coal loss. In order to increase the recovery rate of coal resources and improve the economic benefits of mines, many mines implement non-coal pillar mining in the form of gob-side entry or gob-side entry, that is, no coal pillars are left in the coal mining process and other methods are used. Mining techniques for ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/16
Inventor 金志远马立强于斌张炜王飞杜勋
Owner CHINA UNIV OF MINING & TECH
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