CN202788878U - Can pier column for coal mine tunnel support - Google Patents
Can pier column for coal mine tunnel support Download PDFInfo
- Publication number
- CN202788878U CN202788878U CN 201220348781 CN201220348781U CN202788878U CN 202788878 U CN202788878 U CN 202788878U CN 201220348781 CN201220348781 CN 201220348781 CN 201220348781 U CN201220348781 U CN 201220348781U CN 202788878 U CN202788878 U CN 202788878U
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- steel pipe
- coal mine
- hollow cylindrical
- cushion block
- pier column
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Abstract
The utility model relates to a can pier column for coal mine tunnel support. The can pier column comprises an integral hollow cylindrical steel pipe filled with lightweight foam concrete, cushion blocks are connected to two ends of the integral hollow cylindrical steel pipe respectively, the upper cushion block is connected with a supporting top plate, and the lower cushion block is connected with a coal mine supporting column. The can pier column has the advantages of simple structure, convenient to manufacture, lightweight, high in bearing capacity and flexibility and the like. The operating principle includes that concrete is in a three-directional stressed state under the constraint function of a steel pipe shell to enable the sandwich concrete to have higher compressive strength and deformation resistance.
Description
Technical field
The utility model relates to a kind of underground engineering support articles for use, the tank pier stud that is used for supporting the tunnel of particularly commonly using in a kind of underground coal mining operation.Roadside support, the large span that this tank pier stud can be widely used in breaking roof return airway, highly gassy mine special-purpose watt of row lane, dynamic pressure affect the advance safeguard in tunnel, narrow coal column and gob side entry retaining cuts the lane supporting and comprehensive adopting stops adopting maintenance etc.
Background technology
At present, be used for the coal mine roof plate supporting mainly contain grillage, the workman assembles spoil, concrete column, steel column etc.The spoil amount of shrinking that exists in tradition grillage and the close standing props Bracing Process is large, inner support distortion in lane is serious, maintenance workload is large, the work efficiency that the workman assembles spoil is low, labour intensity large, poor stability, concrete column weight is larger, carrying inconvenience, the light weight concrete construction post is also arranged at present, but need dependence on import; The fluid pressure type steel column also has employing at present, but cost is higher.Therefore employ new technology, that new material is made the coal mine roof plate support post is extremely urgent.
The patent No. is that 201110331668.0 Chinese patent discloses a kind of eps foam concrete tank type pier stud for coal mine support, and it is the monolithic cylindrical structure, comprise thin-wall steel tube with in the high-strength light eps foam concrete filled out; Described eps foam concrete requires apparent density to be controlled in the 400kg/m3, and compressive strength reaches more than the 2.5MPa.Simple in structure, easily manufactured, lightweight.The advantages such as the high and non-deformability of intensity is strong are not only applicable to the supporting of coal mine roadway, can be widely used in the column structure of the engineering fields such as circular pier template, all kinds of supports yet.
Summary of the invention
The purpose of this utility model provides a kind of tank pier stud for colliery tunnel support, better weight reduction, raising intensity and resistance ability.
The technical scheme that the utility model is taked is:
A kind of tank pier stud for colliery tunnel support, comprise monolithic hollow cylindrical steel pipe, the light foam concrete of filling in the steel pipe, be connected with respectively a cushion block at the two ends of monolithic hollow cylindrical steel pipe, top cushion block links to each other with roof supporting, and following cushion block links to each other with coal mine support post.
Described pad is circular, and radius is identical with monolithic hollow cylindrical outer diameter of steel pipes.
Described light foam concrete is mixed by cement, flyash, water, water reducing agent, accelerating admixture, fiber, cellulose and blowing agent.
Described light foam concrete weight part ratio consists of: 200 parts of cement; 0～60 part in flyash; 60～150 parts in water; 20～50 parts of water reducing agents; 60～120 parts of accelerating admixtures; 80～120 parts of fibers; 80～140 parts of celluloses; 5～20 parts of blowing agents.
Described flyash is the first level flour coal ash, and water reducing agent is polycarboxylate water-reducer; Accelerating admixture is the efficient accelerating admixture of HSA; Fiber polypropylene monofilament durafiber; Blowing agent is the HT composite foamable agent.
The utlity model has simple in structurely, easily manufactured, lightweight, bearing capacity is large, the flexible advantage such as strong.Its operating principle is that the effect of contraction by the steel pipe shell makes concrete be in the three dimension stress state, thereby makes sandwich concrete have higher compressive strength and non-deformability.Roadside support, the large span that can be widely used in breaking roof return airway, highly gassy mine special-purpose watt of row lane, dynamic pressure affect the advance safeguard in tunnel, narrow coal column and gob side entry retaining cuts the lane supporting and comprehensive adopting stops adopting maintenance etc.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the cross-sectional view of Fig. 1;
Wherein, 1. monolithic hollow cylindrical steel pipe, 2. light foam concrete, 3. cushion block.
The specific embodiment
Further specify below in conjunction with the specific embodiment.
A kind of tank pier stud for colliery tunnel support, comprise monolithic hollow cylindrical steel pipe 1, the light foam concrete 2 of filling in the steel pipe, be connected with respectively a cushion block 3 at the two ends of monolithic hollow cylindrical steel pipe 1, top cushion block 3 links to each other with roof supporting, and following cushion block 3 links to each other with coal mine support post.Pad 3 is circular, and radius is identical with monolithic hollow cylindrical outer diameter of steel pipes.
Described light foam concrete is mixed by cement, flyash, water, water reducing agent, accelerating admixture, fiber, cellulose and blowing agent, the supporting capacity when following table is different light foam concrete.
Table 1
Claims (2)
1. tank pier stud that is used for colliery tunnel support, comprise monolithic hollow cylindrical steel pipe, the light foam concrete of filling in the steel pipe, it is characterized in that, be connected with respectively a cushion block at the two ends of monolithic hollow cylindrical steel pipe, top cushion block links to each other with roof supporting, and following cushion block links to each other with coal mine support post.
2. a kind of tank pier stud for colliery tunnel support according to claim 1 is characterized in that, described pad is circular, and radius is identical with monolithic hollow cylindrical outer diameter of steel pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220348781 CN202788878U (en) | 2012-07-18 | 2012-07-18 | Can pier column for coal mine tunnel support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220348781 CN202788878U (en) | 2012-07-18 | 2012-07-18 | Can pier column for coal mine tunnel support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202788878U true CN202788878U (en) | 2013-03-13 |
Family
ID=47816153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220348781 Expired - Fee Related CN202788878U (en) | 2012-07-18 | 2012-07-18 | Can pier column for coal mine tunnel support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202788878U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500109A (en) * | 2014-12-19 | 2015-04-08 | 北京瑞诺安科新能源技术有限公司 | Underground support pillar and construction method thereof |
| CN110284905A (en) * | 2019-07-12 | 2019-09-27 | 河北工程大学 | A kind of gob side entry retaining roadside support structure and its method for protecting support |
-
2012
- 2012-07-18 CN CN 201220348781 patent/CN202788878U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500109A (en) * | 2014-12-19 | 2015-04-08 | 北京瑞诺安科新能源技术有限公司 | Underground support pillar and construction method thereof |
| CN110284905A (en) * | 2019-07-12 | 2019-09-27 | 河北工程大学 | A kind of gob side entry retaining roadside support structure and its method for protecting support |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20150718 |
|
| EXPY | Termination of patent right or utility model |