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A thin bedrock support structure

A supporting structure and thin bedrock technology, applied in shaft equipment, shaft lining, mining equipment, etc., can solve problems such as inability to absorb energy, hidden safety hazards in coal seam mining, and damage to protective layers, and reduce the risk of flammable and explosive gases Content, improve ventilation effect, improve the effect of safety

Active Publication Date: 2022-03-08
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The protective support of thin bedrock has become an urgent problem to be solved at present. At present, in order to solve this technical problem, a protective layer is set to support the thin bedrock layer to ensure the safety of its mining process. However, the current protection When the thin bedrock collapses, the layer cannot absorb the energy formed by the collapse, which will easily cause damage to the entire protective layer and bring great safety hazards to the entire coal seam mining

Method used

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  • A thin bedrock support structure
  • A thin bedrock support structure
  • A thin bedrock support structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 The thin bedrock support structure shown includes an anchor layer 3 arranged on a thin bedrock layer 1, an energy absorber 2 arranged on the anchor layer 3, and a supporting reinforcement 4 arranged on the energy absorber 2 The anchor layer 3 is fixedly connected to the thin bedrock layer 1 for protecting the thin bedrock layer 1, and the energy absorber 2 is arranged on the anchor layer 3 for when the thin bedrock layer 1 collapses, Effectively absorb the energy of the collapse, avoiding damage to the support and reinforcement body 4, thereby protecting the safety of coal mining;

[0038] Specifically, during the fixed connection, the anchor layer 3 is fixedly connected to the thin bedrock layer 1 through the anchor component 5, and the energy absorber 2 and the support reinforcement 4 pass through the support reinforcement 4 and the energy absorber 2 in sequence, And the anchor bolt 6 fixedly connected to the end of the anchor component 5 is fixedly ...

Embodiment 2

[0044] On the basis of Example 1, such as Figure 5 with Image 6 The second energy absorbing assembly 2-2 is formed by a plurality of connected square energy absorbing shells 2-201, and the four walls of each square energy absorbing shell 2-201 are respectively provided with ribs extending to the opposite wall 2-202, the ribs 2-202 provided on the four walls of the square energy absorbing shell 2-201 cross each other to form an air supply channel 2-203 in the middle of the square energy absorbing shell 2-201; There are multiple absorbing shells 2-201. When the layout is arranged along the arc surface of the coal roadway, each square energy absorbing shell can be connected by rubber. The square energy absorbing shell 2-201 between the inside and outside of the coal roadway The front and back are butted and fixedly connected to form a layer of arc-shaped energy absorbing components. The air supply channel 2-203 formed by the ribs 2-202 extending from the opposite walls of the ...

Embodiment 3

[0049] On the basis of Embodiment 1, in order to ensure convenient construction, the protective device can be quickly installed, such as Figure 8 The anchor assembly 5 includes an anchor cylinder 501, a drill bit 503 fixed at one end of the anchor cylinder 501, and a joint 504 connected to the other end of the anchor cylinder 501. The circumferential surface of the anchor cylinder 501 near the drill bit 503 is provided with a plurality of The through hole 502 communicated in the anchor tube 501, such as Figure 9 The through hole 502 is provided with a blocking plate 505, and the blocking plate 505 is fixedly connected to the inside of the through hole 502 through a shear plate 507;

[0050] The joint 504 is fixedly connected to the anchor cylinder 502 by threads, and the end of the joint 504 is provided with a threaded hole 506 extending into the joint 504, and the anchor bolt 6 is fixedly connected to the threaded hole 506;

[0051] When in use, the joint 504 is fixedly co...

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Abstract

The invention relates to a support structure for thin bedrock, comprising an anchoring layer arranged on the thin bedrock layer, an energy absorbing body, and a supporting and reinforcing body; the energy absorbing body includes a first energy absorbing component and a second energy absorbing component fixedly connected to each other ; The first energy absorbing assembly at least includes a first arc-shaped plate and a second arc-shaped plate, and the second arc-shaped plate is provided with a plurality of intermittent arcs that are parallel to each other and have the same arc direction as the second arc-shaped plate The two ends of the intermittent arc-shaped chute are respectively fixed with elastic bodies, and the opposite ends of the two elastic bodies are respectively fixedly connected with connecting blocks, and the two connecting blocks are respectively fixed with the first arc-shaped plate through the connecting plate connected, and the extension lines of the two connecting plates to the end of the first arc-shaped plate intersect, which can effectively absorb the energy generated when the thin bedrock collapses, and avoid damage to the support device when the thin bedrock layer collapses , causing mining safety hazards, effectively improving the safety of coal mining.

Description

technical field [0001] The invention relates to the technical field of rock formation protection, in particular to a thin bedrock support structure. Background technique [0002] During coal mining, the upper part of the coal seam is the bedrock layer, and in many cases, the occurrence characteristics of the coal seam are shallow buried depth and thin bedrock. The upper part of the bedrock is a loose layer such as sandy gravel layer or aeolian sand, some of which are thick and loose with high water content, which poses a great threat to the production of the working face. When the thickness of the bedrock becomes thinner, the support load of the stope support will significantly increase the manifestation of mine pressure, and it is likely to eventually cause the roof collapse disaster. [0003] The protective support of thin bedrock has become an urgent problem to be solved at present. At present, in order to solve this technical problem, a protective layer is set to suppor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/00E21D11/10E21D20/00E21D20/02
CPCE21D11/10E21D11/00E21D20/021E21D20/003
Inventor 冯彧雷涂敏史静杨静韬胡金岑杨远鹏张健鹏孙伟轩楚翔宇刘富豪
Owner ANHUI UNIV OF SCI & TECH