Large-scale re-mining method for filling small-kiln destruction area

A technology for destroying areas and filling materials, applied in the fields of fillings, mining equipment, earthwork drilling, etc., can solve the problems of difficult recovery of large mines, inconvenient safe production of mines, and damage to the ecological environment of national coal resources. The effect of improving production efficiency and extending service life

Inactive Publication Date: 2012-04-25
CHINACOAL PINGSHUO GRP
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AI Technical Summary

Problems solved by technology

In recent years, the state has taken active measures to close a large number of small coal mines. According to statistics, only in Shanxi Province from 2005 to 2008, a total of 3,300 small coal mines were closed and eliminated. The inconvenience seriously affects the reasonable layout of the working face
The recovery rate of coal resources mined by small coal kilns is very low, generally between 10% and 15%. A large number of high-quality coal resources are left in the damaged areas of small coal kilns. After the coal seams damaged by small coal kilns, it is difficult for large mines to recover. The environment has caused serious damage, and the existing goaf recovery technology of small kilns has not yet formed a systematic method to guide production practice

Method used

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  • Large-scale re-mining method for filling small-kiln destruction area
  • Large-scale re-mining method for filling small-kiln destruction area
  • Large-scale re-mining method for filling small-kiln destruction area

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Effect test

Embodiment Construction

[0037] Such as figure 1 , figure 2 , image 3 and Figure 4 As shown, a large-scale recovery method of filling in the damaged area of ​​a small kiln is used to detect the goaf of the small kiln by means of geophysical prospecting, drilling, roadway exploration, etc. → master the distribution, size, and hidden dangers of the goaf of the small kiln → determine Thickness and strength of cutting layer→determination of thickness and strength of key bearing layer→construction grouting drilling→construction exhaust drilling→grouting and filling→recovery in damaged area of ​​small kiln.

[0038] The specific process steps of the method are as follows:

[0039] 1) Detection: Detect the goaf of the small kiln, master the distribution of the goaf of the small kiln, the size of the internal space, the layer, and the existing safety hazards, and obtain on-site data for hidden danger treatment, grouting filling, and re-mining;

[0040] 2) Repair: To deal with potential safety hazards a...

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Abstract

The invention belongs to the technical field of coal mining, which relates to a large-scale re-mining method for filling a small-kiln destruction area and is mainly suitable for recovering coal resource in the area damaged by a small-kiln goaf. The large-scale re-mining method comprises the following technical processes of: probing the small-kiln goaf by the means of geophysical prospecting, drilling, tunnel prospecting and the like; mastering the distribution, the size and the existing hidden danger of the small-kiln goaf; determining the thickness and the strength of a cut layer; determining the thickness and the strength of a bearing key layer; constructing, grouting and drilling; constructing, venting and drilling; grouting and filling; and re-mining the small-kiln destruction area. The large-scale re-mining method has the beneficial effect that the coal resource left in the small-kiln destruction area can be recovered furthest, and the service year limit of a mine is prolonged.

Description

Technical field [0001] The present invention is the field of coal mining technology, involving a small kiln destructive area to fill in the large -scale recovery method. Background technique [0002] There are many small coal kilns in my country, Shanxi, and Shaanxi in China. Many small coal kilns are damaged to high -quality coal resources of large Jingtian.In recent years, the country has taken positive measures to close a large number of small coal kilns. According to statistics, Shanxi Province alone closed 3,300 small coal kilns from 2005 to 2008, but the leftover small coal kiln khakoscopic area brought great great production to the safety production of mines.The inconvenience seriously affected the reasonable layout of the working surface.The recovery rate of small coal kilns is very low, which is generally between 10% and 15%. A large amount of high -quality coal resources remain in the small kiln damage area. After the small coal kiln is destroyed, the coal seams are dif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F15/00
Inventor 张忠温吴吉南周保精朱建明徐金海
Owner CHINACOAL PINGSHUO GRP
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