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Reserved deformation stage-type grading yielding gob-side entry retaining gob-side filling body and construction method thereof

A technology of filling body and stage, which is applied in the direction of filling, earthwork drilling, safety devices, etc., can solve the problems of high cost, large amount of unit block prefabrication, and large amount of underground masonry construction, and achieves convenient and easy connection. The effect of construction and low cost

Active Publication Date: 2015-12-09
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the walls of this structural form are all built with combined unit blocks, which has many deficiencies.
The main performance is that, on the one hand, the prefabrication of the unit block itself is large and the cost is high;

Method used

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  • Reserved deformation stage-type grading yielding gob-side entry retaining gob-side filling body and construction method thereof
  • Reserved deformation stage-type grading yielding gob-side entry retaining gob-side filling body and construction method thereof
  • Reserved deformation stage-type grading yielding gob-side entry retaining gob-side filling body and construction method thereof

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Embodiment 1

[0100] Taking a certain mine as an example, the construction method of the filling body beside the gob-side retaining roadway of the present invention will be described by way of example.

[0101] Known geological conditions:

[0102] The 1302 working face of a certain mine mines the third lower coal seam, the full height is mined at one time, the thickness of the mined height is h=6.2m, the strike length is 1600m, and the inclination length is 180m;

[0103] The roof lithology from bottom to top is: siltstone (1.09m), fine sandstone (9.81m), coarse sandstone (17m), fine sandstone (2.45m), claystone (16.12m), fine sandstone (38m) .

[0104] According to the existing mine pressure observation results, the main mine pressure parameters of the 1302 working face are as follows: figure 2 Shown:

[0105] Thickness of direct roof 4 (caving layer) m z =11m;

[0106] The distance from the roadside filling body 9 to the fracture line at the end of the old top rock beam 5 is C=6.5m; ...

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Abstract

The invention discloses a reserved deformation stage-type grading yielding gob-side entry retaining gob-side filling body and a construction method thereof. A concrete column is arranged below the gob-side filling body. The upper portion of the concrete column is formed through yielding rigid body building blocks provided with a hollow brick structure and having a yielding function. The number of layers of yielding rigid bodies is determined according to the number of main roofs above a roadway top plate, the yielding rigid bodies are built in a stacked mode, and the lateral compressive strength of the yielding rigid bodies in all layers is sequentially increased from top to bottom. According to the technical concept, when the main roofs above the top plate sink, buffering is formed and a rigid supporting state is always kept through sink allowance provided due to the fact that the yielding rigid bodies are pressed flat. The construction method is easy, and construction is quick, easy and convenient. Compared with the prior art, the reserved deformation stage-type grading yielding gob-side entry retaining gob-side filling body and the construction method thereof have the advantages of being good in safety and stability, low in project cost, convenient and quick to construct and the like, and are suitable for large-embedded-depth thick coal seam yielding entry retaining construction.

Description

technical field [0001] The invention relates to a coal mine gob-side roadway filling method, in particular to a reserved deformation stage type graded gob-side gob-side roadway filling body and its construction method, which is suitable for large-buried deep coal seam yielding roadway retention construction. Background technique [0002] Gobside entry retaining technology is a major reform of coal mining and mining roadway support technology. It can improve the recovery rate of coal sources, reduce the rate of roadway excavation, ease the tension of mining, reduce the probability of coal and gas outburst, and realize the intensification of mines. Production has a significant effect. [0003] In the gobside retaining technology, it is necessary to build the roadside wall to maintain the roadway. The scientific design and construction of the roadside wall are the core issues and key technologies for the success of the roadway retention. If the design strength and stiffness o...

Claims

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Application Information

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IPC IPC(8): E21F15/00
CPCE21F15/00
Inventor 石永奎郝建蒋宇静武继胜展晓元齐敏华张景煜
Owner SHANDONG UNIV OF SCI & TECH
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