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Method for supporting retained gob-side entry of blasting-mining working faces of small-area thin seam

A technology of working face and coal seam blasting, which is applied in the field of gobside entry support in small-area thin coal seam blast mining face, and can solve the problems of scientific support methods and safety hazards in blast mining face without small area thin coal seam, etc. To achieve the effect of preventing natural ignition and harmful gas from entering the working face, maintaining stability and reducing pressure

Active Publication Date: 2016-05-04
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

But at present, there is no scientific support method corresponding to blasting mining face with small area and thin coal seam, and the existing support method has potential safety hazards

Method used

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  • Method for supporting retained gob-side entry of blasting-mining working faces of small-area thin seam
  • Method for supporting retained gob-side entry of blasting-mining working faces of small-area thin seam
  • Method for supporting retained gob-side entry of blasting-mining working faces of small-area thin seam

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Embodiment Construction

[0036] combined with Figures 1 to 3 The specific embodiment of the present invention is described further:

[0037] The scheme design of the pulling working face is as follows: figure 1 shown.

[0038] Support schemes such as figure 2 image 3 As shown, the process is: supplementary bolting 20m ahead of the working face, the row spacing is 1.0m, four bolts in each row, and the bolt specification is Φ22×2000mm; the method of advancing the coal wall is used to erect the shed, and the I-shaped steel shed The coal wall distance of the advanced working face shall not exceed 4m.

[0039] Before the shed is advanced, the gangue on the floor of the shed area is cleaned manually with a pick, and the cleaned gangue is manually transferred to the original belt conveyor transportation system to be transported to the ground. Safety. Before installing the beam, first check the section width of the roadway according to the center line, and measure the height of the roadway. If it doe...

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Abstract

The invention discloses a method for supporting a retained gob-side entry of the blasting-mining working faces of a small-area thin seam. The retained gob-side entry of the blasting-mining working faces of the small-area thin seam is supported through an I-shaped steel shed and timber, and single hydraulic props are adopted for reinforcing supporting. The supporting method includes the following steps of 1, advance supporting, wherein anchor rods are additionally anchored on the advance blasting-mining working face in a gate road, and the I-shaped steel shed is erected on the advance blasting-mining working face; 2, lagging supporting, wherein after the I-shaped steel shed is completely erected, single hydraulic props are erected on the lagging blasting-mining working face to reinforce supporting; 3, gob side caving, wherein after materials are fed back to the blasting-mining working faces, if a roof can not automatically fall, explosive-charging caving is carried out. According to the method, entry retaining is achieved through the I-shaped steel shed, the single props and explosive-charging caving; the gob-side entry retaining mode is low in investment, quick in effective response and high in benefit and safety factor, and is one of extremely-beneficial ways for enhancing safe production of a mine.

Description

technical field [0001] The invention relates to the field of coal mining, in particular to a support method for gob-side roadway retention in a small-area thin coal seam blast mining working face. Background technique [0002] With the tightening of coal resources in the central and eastern regions, small-area thin coal seam mining will increase day by day. The excavation rate of the gob-side entry roadway is greatly reduced, and the recovery rate of the mining area is significantly increased, realizing the advantages of rapid mining, shortening the moving time, preventing the formation of island working faces, and preventing fires. Compared with the roadway with coal pillars, the gob-side retaining roadway has advantages in terms of technology, economy and production safety. But at present, there is no scientific support method corresponding to the blast mining working face with small area and thin coal seam, and the existing support method has potential safety hazards. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/00E21D11/02E21D11/14E21D20/00
CPCE21D11/00E21D11/02E21D11/14E21D20/00
Inventor 王昌祥江宁王玉成李金平王建行孔贺孔德志张保良张士川赵金海王学武
Owner SHANDONG UNIV OF SCI & TECH
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