A support method for gob-side entry retaining in blast mining working face with small area and thin coal seam

A small-area working face technology, applied in mining equipment, earthwork drilling, shaft equipment, etc., can solve problems such as scientific support methods and hidden safety hazards in blast mining working faces without small-area thin coal seams, so as to prevent spontaneous combustion And harmful gas enters the working face, maintains stability, and is easy to operate

Active Publication Date: 2019-01-08
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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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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  • A support method for gob-side entry retaining in blast mining working face with small area and thin coal seam
  • A support method for gob-side entry retaining in blast mining working face with small area and thin coal seam
  • A support method for gob-side entry retaining in blast mining working face with small area and thin coal seam

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Experimental program
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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 gob-side entry support method for a small-area thin coal seam blast mining face. The small-area thin coal seam blast mining face is supported by an I-shaped steel shed and wood, and a single hydraulic prop is used. To strengthen the support, the support method adopts the following steps: (1) Advance support: add bolts on the advance blast mining face in the trough; erect the I-shaped steel shed on the advance blast mining face; (2) lag support Protection: After the erection of the I-shaped steel shed is completed, a single hydraulic prop is erected to strengthen the support at the lagging blast mining face; Just carry out charging and put the top when falling. The present invention uses the I-shaped steel shed, the single pillar, and the top of the charge to carry out the alley retention. The gobside entry retaining has low investment, quick effect, high benefit and high safety factor, and is one of the extremely beneficial ways to enhance mine safety production.

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 Patents(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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