CN202266280U - A retractable breast beam used for supporting a U-shaped shed - Google Patents
A retractable breast beam used for supporting a U-shaped shed Download PDFInfo
- Publication number
- CN202266280U CN202266280U CN2011203157891U CN201120315789U CN202266280U CN 202266280 U CN202266280 U CN 202266280U CN 2011203157891 U CN2011203157891 U CN 2011203157891U CN 201120315789 U CN201120315789 U CN 201120315789U CN 202266280 U CN202266280 U CN 202266280U
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- Prior art keywords
- breast beam
- supporting
- retractable
- pressure
- support
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Abstract
The utility model relates to a retractable breast beam used for supporting a U-shaped shed. The retractable breast beam comprises a left breast beam and a right breast beam connected with each other through clamping cables and two end heads of the retractable breast beam are provided with pallets. The retractable breast beam can be used for supporting the U-shaped shed. When a tunnel suffers pressure, the two-section breast beam can bear pressure and retract slowly out of friction resistance, and thus generates flexible resistance against the conducted pressure through flexibility, prevents rigid damage of struts under great pressure, reduces and mitigates deformation of beams of the U-shaped shed, and maintains the shape of the tunnel. The support is not capable of changing the suffered pressure, but is capable of improving overall load-bearing capacity through self-adjustment, realizing more uniform load-bearing, and preventing the problems of formation of damage weak surfaces, damage in local areas, and overall ineffectiveness.
Description
Technical field
The utility model belongs to the colliery tunnel support technical field, is specifically related to the contracted support beam of a kind of U of being used for type canopy supporting.
Background technology
In order to improve China's coal-mine roadway maintenance situation, except the development bolt support, at some three-soft seams, roof cracking tunnel particularly, anchor pole is not easy to carry out anchoring, and using metallic support is another important development direction of China's coal-mine roadway support reform.The proportion of this type support accounts for nearly 1/4th of national state-owned coal mine roadway at present.
In recent years at the main following points of supporting experience of deep-well tunnel: 1. the tunnel design with arrange, at first require the tunnel that enough excavated sections are arranged, allow the roadway surrounding rock convergence; Secondly avoid pressure peak district as far as possible, preferably be arranged in and unload in the pressure zone, make roadway surrounding rock pressure minimum; 2. adopt closed, multi-level support system, by incompressible filler-let and press layer-bearing bed to constitute " sandwich " type integral support more; 3. make full use of the combined supporting mode of grouting and reinforcing method and anchor-spray-Zhi-net, improve the self-supporting ability of roadway surrounding rock to greatest extent; 4. the supporting of arch contractibility metallic support is all adopted in development heading; Quality is set up in special emphasis supporting, also considers to improve simultaneously the shaped steel quality to strengthen shaped steel weight, increases support density.From now on, because a batch of roadway surrounding rocks are softer, receive mining influence, particularly along with development of Mechanized Coal Mining Operation, the pit mining degree of depth increases, and drift section is long-pending to be strengthened, and deformation of the surrounding rock in tunnel is violent, and the use of metallic supports in galleries can increase than escheat year by year.
U shape steel bracket supporting in the metallic support is compared with other support patterns of tunnel, and its unique advantages is arranged: 1. supporting intensity is big, and for rational rack form, its integral body has advantages of high bearing capacity; 2. wide adaptability can satisfy the requirement that press in different geological condition and ore deposit, and when the pressure of country rock reached certain value, support just produced and contracts, and the pressure of shoulder bed effects on support is descended, and avoids the too high and unstable failure of load; 3. easy for installation, quick, help mechanized construction; 4. access times are many, though one-time investment is high, integrated cost is low; 5. safe and reliable, the mode of failure of metallic support is generally bent bends distortion and unstability, not rupture failure and make the unexpected unstability of roadway surrounding rock and sudden roof fall accident appears in inbreak suddenly.
Have good section configuration and geometric parameter in view of U shaped steel, adopt the U shaped steel collapsible timbering suitable for surrounding rock large deformation well of its processing, big characteristics of ground pressure, in roadway support, have some other supports incomparable advantage.U shaped steel collapsible timbering great advantage is when the pressure of shoulder bed effects on support reaches certain value; The U shape steel bracket can realize that section shrinks; The pressure of country rock is alleviated in the distortion of suitable for surrounding rock, thus the destruction of having avoided the pressure of country rock to cause support greater than the bearing capacity of support.This yield supporting characteristic of U shape steel bracket can play autoprotection, avoids the effect of deformation failure.Therefore, the U shape steel bracket is widely used in the unstable tunnel of the big section of supporting, aximal deformation value.External engineering practice proves, U shaped steel collapsible timbering is a development heading support form preferably at present, and European countries are also in a large amount of employings.
But, along with the extension gradually of mine, in the high stressed soft rock tunnel; The use of U steel metallic support has received challenge, and common U steel suffers yield deformation in the tunnel, and drift section takes place to reduce in a large number; Had a strong impact on the ordinary production of mine, worker's life has received threat.Because setting up still of U steel set up by the workman by hand, lean on the sectional area that increases the U steel to increase the method for U steel resistivity, limited by workman's muscle power and become impossible.The enabling capabilities that how to improve the U steel becomes the problem that presses for solution.
The utility model content
The purpose of the utility model is to solve the above-mentioned technical problem that exists in the prior art, and the contracted support beam of a kind of U of being used for type canopy supporting is provided.Change present present situation, keep the tunnel long-term stability, reduce the roadway maintenance cost along coal digging laneway U steel supporting intensity deficiency.
For realizing above-mentioned purpose, the technical scheme that this practicality is adopted is following:
The contracted support beam that is used for the supporting of U type canopy of the utility model comprises left side support beam and right support beam through the connection of card cable, is provided with pallet in the two ends that supports beam.
Left side support beam described in the utility model is preferably U shaped steel respectively with right support beam.
Described card cable wrap is drawn together draw-in groove clamping plate and lower bayonet slot clamping plate, through bolton, is provided with reinforcing rib at last draw-in groove clamping plate and lower bayonet slot clamping plate back between last draw-in groove clamping plate and the lower bayonet slot clamping plate.
The contracted support beam of the utility model is applied to the supporting of U type canopy; When press in the tunnel; Two joint support beams rely on frictional resistance can bear pressure and slowly shrink, and the retractility of support beam makes the support beam produce flexible resistance to the pressure of conduction, have protected the rigidity damage of pillar under huge pressure; Reduce, slowed down U type canopy capplce deflection simultaneously, keep roadway shape.Support can not change the size of the suffered force value of support; But can regulate through self; Strengthen the ability of the whole bearing load of support, make to be not easy the stressed more even of support on support, to form and to destroy plane of weakness; Cause support to destroy, and finally cause the support global failure at regional area.
Description of drawings
Fig. 1 is the sketch map of the contracted support beam of the utility model when being applied to the supporting of U type canopy.
Fig. 2 is the structural representation of card cable in the utility model.
The specific embodiment
The contracted support beam that is used for the supporting of U type canopy of the utility model is as shown in Figure 1, comprises through the left side of card cable 3 connections supportting beam 2 and right support beam 4, be provided with in the two ends that supports beam to be used for shaped steel with U, and the pallet 1 of 6 connections, described left side support beam supports beam with the right side and is respectively U shaped steel.
Described card cable wrap is drawn together draw-in groove clamping plate 3-1 and lower bayonet slot clamping plate 3-2, through bolton, is provided with reinforcing rib 3-3 at last draw-in groove clamping plate and lower bayonet slot clamping plate back between last draw-in groove clamping plate and the lower bayonet slot clamping plate.
In the present embodiment, the U type support beam that can contract is to adopt the U section steel manufacture, and the support beam that can contract divides two joints; Long 1.4～18 meters of every joint is fixed with two U type card cables, and lap length is no less than 0.4 meter; Two are blocked 0.2 meter of cable spacing, and weld with it with the U shaped steel of 150mm at two ends, and the angle between the U type canopy is 35～40 °; Increase the measuring body intensity of U type canopy, the support beam is beaten at U type canopy post leg and U section steel beam clamped beam head Ka Lanchu and is just gone up, and holds out against two and helps.When pinching joist, be no less than 5 people's work compounds, the four-player joist, a people goes up U type card, and fastening card cable nut moment of torsion reaches 200NM-250NM.The support beam is supported by two posts 5 of can contracting, and construction sets in the time of can contracting a some post, set a post and should fully contact with the support beam, and with timber wedge back of the body jail, and the some post must have the hard needling of 200mm, and the some post is necessary fixed, is strictly on guard against loosening.
Claims (3)
1. contracted a support beam that is used for the supporting of U type canopy is characterized in that: comprise left side support beam and right support beam through the connection of card cable, be provided with pallet in the two ends that supports beam.
2. the contracted support beam that is used for the supporting of U type canopy according to claim 1 is characterized in that: described left side support beam is respectively U shaped steel with right support beam.
3. the contracted support beam that is used for the supporting of U type canopy according to claim 1 and 2; It is characterized in that: described card cable wrap is drawn together draw-in groove clamping plate and lower bayonet slot clamping plate; Through bolton, be provided with reinforcing rib between last draw-in groove clamping plate and the lower bayonet slot clamping plate at last draw-in groove clamping plate and lower bayonet slot clamping plate back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203157891U CN202266280U (en) | 2011-08-26 | 2011-08-26 | A retractable breast beam used for supporting a U-shaped shed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203157891U CN202266280U (en) | 2011-08-26 | 2011-08-26 | A retractable breast beam used for supporting a U-shaped shed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202266280U true CN202266280U (en) | 2012-06-06 |
Family
ID=46157078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203157891U Expired - Fee Related CN202266280U (en) | 2011-08-26 | 2011-08-26 | A retractable breast beam used for supporting a U-shaped shed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202266280U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670464A (en) * | 2013-12-19 | 2014-03-26 | 山东华宁矿业集团有限公司 | Roadway interlocking reinforced type U-shaped shed |
| CN106948836A (en) * | 2017-03-15 | 2017-07-14 | 河南理工大学 | Breaking surrounding rock stope drift active workings method for protecting support in a kind of three-soft seam goaf |
-
2011
- 2011-08-26 CN CN2011203157891U patent/CN202266280U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670464A (en) * | 2013-12-19 | 2014-03-26 | 山东华宁矿业集团有限公司 | Roadway interlocking reinforced type U-shaped shed |
| CN106948836A (en) * | 2017-03-15 | 2017-07-14 | 河南理工大学 | Breaking surrounding rock stope drift active workings method for protecting support in a kind of three-soft seam goaf |
| CN106948836B (en) * | 2017-03-15 | 2018-09-14 | 河南理工大学 | Breaking surrounding rock stope drift active workings method for protecting support in a kind of three-soft seam goaf |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120606 Termination date: 20130826 |