CN2111364U - Two-way expanding support - Google Patents
Two-way expanding support Download PDFInfo
- Publication number
- CN2111364U CN2111364U CN 91230112 CN91230112U CN2111364U CN 2111364 U CN2111364 U CN 2111364U CN 91230112 CN91230112 CN 91230112 CN 91230112 U CN91230112 U CN 91230112U CN 2111364 U CN2111364 U CN 2111364U
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- CN
- China
- Prior art keywords
- back timber
- chock
- way
- type card
- fastening
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The utility model provides a two-way telescopic bracket which comprises a top beam and post legs, wherein the post legs comprise upper posts and lower posts. The two-way telescopic bracket is characterized in that the top beam is composed of a middle top beam and two side top beams which are respectively connected with both ends of the middle top beam; fixing devices are respectively arranged in the connecting positions between the middle top beam and the side top beams and the connecting positions between the upper post and the lower post. The utility model has the advantages of simple structure, longitudinal and transversal telescopic performance, high loading capacity, reliability, and convenient installation and maintenance. The two-way telescopic bracket is especially suitable for supporting kinetic pressure and soft rock well lanes in mines.
Description
The utility model relates to a kind of support that is used for mine dynamic pressure and soft rock shaft and drift supporting, particularly be a kind of two-way compressibile support.
Compressibile support has the characteristic that adapts with powerful pressure of country rock and deformation displacement in mine dynamic pressure and soft rock shaft and drift supporting.But but known contractibility excavation support is made up of vertical shrinking structure and horizontal shrinking structure as shown in Figure 6.Vertically but shrinking structure is made up of post leg backing plate, post leg, straight skidding member etc.During installation, earlier two straight skidding members are placed the web both sides of post leg top overlap joint section respectively, get final product with the bolt connection then.There is the side direction contractibility to connect but laterally shrinking structure is made up of horizontal clamping brake pad, back timber etc.The trapezoidal compressibile support of this i iron has the characteristic that can contract in length and breadth, in dynamic pressure and soft rock shaft and drift supporting, has supporting capacity, the technical performance that non-deformability is strong.But also there are following problems and deficiency simultaneously:
(1), its adopt main that vertically can contract is deformed steel by the straight skidding member, needs special special processing, has increased support machining complexity and cost.
(2), its post leg upper end straight skidding member that laterally can contract just slides along the bottom flange of back timber and whole back timber does not have contractibility, but reinforcing beam; When two help displacement deformation, back timber will insert rock group, suffer that gross distortion damages.
(3), its longitudinal and transverse contracting all clamps the frictional force that produces by bolt.Because the web or the edge of a wing thickness of i iron are nonstandard, inconsistent, cause that frictional resistance changes in sliding process, the supporting capacity of support is changed and stable inadequately.
(4), its longitudinal and transverse full clamping force by bolton that contracts reach the regulation requirement so fitting operation must make bolt screw, and actual underground labour operation is difficult to grasp, and causes support resistance not reach rated value; Simultaneously rubbing surface is under the mal-condition of down-hole, as pollution oil, water, mud and corrosion etc., certainly will influence its frictional resistance, cause the instability of rack bearing ability, unreliable.
(5), fishbolt damages at the down-hole easy-to-rust, and clamping force increases in time and decays, and also causes support resistance unstable reliable, and removes, installs, safeguards all than trouble.
In view of above reason, the purpose of this utility model be for provide a kind of simple in structure, can contract in length and breadth, supporting capacity is strong, reliable, processing, the two-way easily compressibile support of installation, maintenance.
The utility model comprises back timber, contain upper prop, the post leg of lower prop, it is characterized in that back timber is by middle back timber, the two limit back timbers that are connected with middle back timber two ends are respectively formed, the limit back timber other end is connected with the post leg, be provided with middle back timber and the fastening device for fastening of limit back timber at middle back timber and back timber junction, limit, be provided with upper prop in the junction of upper prop and lower prop, the device for fastening (referring to Fig. 1) that lower prop connects, back timber, but the post leg is self shrinking structure, fundamentally changed the major defect of aforesaid rigidity back timber, can contract in length and breadth, adopt device for fastening, supporting capacity is strong in addition, reliably, install, easy to maintenance.
Above-mentioned middle back timber and upper prop adopt duplexing word steel to make respectively, and limit back timber and lower prop adopt single i iron material to make (referring to Fig. 2, Fig. 3) respectively, do not need working special-shaped separately steel, are easy to processing and manufacturing, reduce cost.
The urgency that the top flange of above-mentioned limit back timber, the side plane on the lower prop are respectively equipped with gradient α 1=1/250--1/400 increases the micro-drag skewback (referring to Fig. 4) that hinders skewback and gradient α 2=1/500--1/800, the utility model is remained and slightly increase working resistance, realize reliable effectively control country rock.
Above-mentioned fastener is by U type card, and chock is formed, and establishes the wedge hole in the bottom of U type card, and chock stretches into (referring to Fig. 2) in the wedge hole, easy operating, installation and dismounting.
On above-mentioned chock side, be provided with groove, the big end that is positioned at U type card lateral surface at chock with chock on the groove relative position on be provided with locking pin (referring to Fig. 1,2), prevent that chock from coming off.
Compare with known contractibility excavation support, the utlity model has following advantage:
(1), but simple in structure, back timber, post leg all adopt self shrinking structure, have fundamentally changed the major defect of rigidity back timber.When roadway pressure is big, when longitudinal and transverse compression took place, beam and column leg corresponding shortening in top can not inserted rock group or base plate, can not suffer deformation failure greatly because of rigidity.
(2), the contracted amount of top beam and column leg is all bigger, approaches about the 40-45% of tunnel clear span and clear height; Generally can reach the 700-900 millimeter.
(3), can all adopt the processing and manufacturing of same model mining i beam, not need working special-shaped separately steel to be easy to each Ma Kuang processing and manufacturing voluntarily, reduce cost.
(4), the working resistance of beam, post, not only frictional force by clamping or compressing, main is the frictional resistance increment that thickness produced that increases gradually that leans on two seal face skewbacks, and beginning is the anxious resistance section that increases, make support comparatively fast reach specified resistance, in time provide enough big initial resistance and working resistance country rock; Be only the micro-drag section then, make support in the process that can contract in length and breadth, remain and slightly increase its working resistance, satisfy support Design operating point parameter and the reliable effectively control of country rock.
(5), adopt U type card and the urgent connected mode of chock, fastening reliable, easy operating uses, and makes things convenient for installation and removal, is not afraid of corrosion, have in addition anxious increase resistance section, micro-drag section increase the resistance characteristic, more can bring into play the advantage of this connected mode, overcome its deficiency.
(6), supporting structure and the effect of roadway pressure adapt, and duplexing word girder steel section is positioned at back timber middle part and post leg top, the position of support force maximum, displacement maximum just, give full play to its effect, suit to use in dynamic pressure big at pressure, that displacement deformation is big and the soft rock roadway, supporting capacity is big.Along with taking place can to contract in length and breadth behind the support force, beam, post all shorten, and within the two i iron of single i iron retraction, thereby beam, post supporting capacity are further increased greatly, and renitency is big.
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing:
Fig. 1: the utility model structural representation
The A-A sectional view of Fig. 2: Fig. 1
The B-B sectional view of Fig. 3: Fig. 1
Fig. 4: limit back timber (or lower prop) structural representation
The left view of Fig. 5: Fig. 4
Fig. 6: existing contractibility excavation support structural representation
The C-C sectional view of Fig. 7: Fig. 6
The D-D sectional view of Fig. 8: Fig. 6
Fig. 1-Fig. 3 has provided structural representation of the present utility model.Form by back timber 1, post leg 2, device for fastening 3.
Middle back timber 4 in the back timber 1 is two single i iron materials are welded into two i iron and make with several piece contiguous block 5, limit back timber 6 is to adopt single i iron material to make, being welded with the gradient made from the band steel material on the top of limit back timber 6 and being α 1=1/250--1/400(, preferably to adopt gradient herein be 1/300) urgency increase resistance skewback 7 and gradient α 2=1/500--1/800(preferably adopts 1/600 micro-drag skewback 8 herein, on the two ends, bottom of limit back timber 6, be welded with and prevent that the locating piece 9(that comes off is referring to Fig. 4-Fig. 5).
The two wedge holes 14 that match with chock 13 are arranged at the bottom of the U type card 12 in the device for fastening 3, and the two sides of chock 13 are provided with groove 15, are positioned at the locking pin 16 that chock 13 comes off that prevents that the groove 15 of can packing into is arranged on U type card 12 lateral surfaces at chock 13 big ends.
When the utility model was installed, the two ends of back timber 4 placed back timber 4 two ends and both sides back timber 6 joints respectively with the U type card 12 in two device for fastening 3 during an end of both sides back timber 6 was respectively charged into.In two wedge holes 14 of the U of each fastener 3 type card 12 lower ends, be respectively charged into chock 13 and the two ends of locking pin 16 two chocks 13 of packing into are positioned at the big end groove 15 of U type card 12 lateral surfaces.Middle back timber 4 in upper prop 10 in the post leg 2 and the assembling of lower prop 11 and the back timber 1 is identical with the assembling of limit back timber 6.After post leg 2 installs, the other end of the both sides back timber 6 in the back timber 4 is snapped in respectively in the two post legs 2, install stablely, prevent from that big gun from collapsing to topple over, the utility model then installs.
In the utility model each parts in addition can be made series of products according to actual needs.
Claims (7)
1, two-way compressibile support, comprise back timber, the post leg that contains upper prop, lower prop, it is characterized in that described back timber is made up of with the limit back timber that middle back timber two ends are connected respectively middle back timber, two, the limit back timber other end is connected with the post leg, be provided with middle back timber and the fastening device for fastening of limit back timber at middle back timber and back timber junction, limit, being provided with in the junction of upper prop and lower prop can be with upper prop and the fastening device for fastening of lower prop.
2, two-way compressibile support as claimed in claim 1, back timber and upper prop adopt duplexing word steel to make respectively in it is characterized in that, and limit back timber and lower prop adopt single i iron material to make respectively.
3, the urgency that two-way compressibile support as claimed in claim 1 or 2, the side plane that it is characterized in that the top flange of described limit back timber and lower prop are respectively equipped with gradient α 1=1/250--1/400 increases the micro-drag skewback of resistance skewback and gradient α 2=1/500--1/800.
4, two-way compressibile support as claimed in claim 1 or 2 is characterized in that described device for fastening is made up of U type card, chock, is provided with the wedge hole in the bottom of U type card, and chock stretches in the wedge hole.
5, two-way compressibile support as claimed in claim 3 is characterized in that described device for fastening is made up of U type card, chock, is provided with the wedge hole in the bottom of U type card, and chock stretches in the wedge hole.
6, two-way compressibile support as claimed in claim 4 is characterized in that described chock is provided with groove, chock be positioned on the big end of U type card lateral surface with chock groove relative position on be provided with locking pin.
7, two-way compressibile support as claimed in claim 5 is characterized in that described chock is provided with groove, chock be positioned on the big end of U type card lateral surface with chock groove relative position on be provided with locking pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91230112 CN2111364U (en) | 1991-10-24 | 1991-10-24 | Two-way expanding support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91230112 CN2111364U (en) | 1991-10-24 | 1991-10-24 | Two-way expanding support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2111364U true CN2111364U (en) | 1992-07-29 |
Family
ID=4935477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91230112 Granted CN2111364U (en) | 1991-10-24 | 1991-10-24 | Two-way expanding support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2111364U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793152A (en) * | 2010-03-15 | 2010-08-04 | 徐州矿务集团有限公司 | Construction technology for soft rock large-deformation tunnel by de-stressing method and matched bracket |
| CN102493824A (en) * | 2011-12-12 | 2012-06-13 | 庄炳元 | Retractable trapezoid support with cushion blocks |
| CN103133019A (en) * | 2011-11-23 | 2013-06-05 | 王琼 | Flexible shield support with adjustable height |
| CN103775111A (en) * | 2014-01-26 | 2014-05-07 | 河南大有能源股份有限公司常村煤矿 | Combined-connected mining transverse H-shaped steel bracket |
| CN103924990A (en) * | 2014-05-07 | 2014-07-16 | 刘允勇 | High-intensity retractable support |
-
1991
- 1991-10-24 CN CN 91230112 patent/CN2111364U/en active Granted
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793152A (en) * | 2010-03-15 | 2010-08-04 | 徐州矿务集团有限公司 | Construction technology for soft rock large-deformation tunnel by de-stressing method and matched bracket |
| CN103133019A (en) * | 2011-11-23 | 2013-06-05 | 王琼 | Flexible shield support with adjustable height |
| CN102493824A (en) * | 2011-12-12 | 2012-06-13 | 庄炳元 | Retractable trapezoid support with cushion blocks |
| CN102493824B (en) * | 2011-12-12 | 2014-04-02 | 庄炳元 | Retractable trapezoid support with cushion blocks |
| CN103775111A (en) * | 2014-01-26 | 2014-05-07 | 河南大有能源股份有限公司常村煤矿 | Combined-connected mining transverse H-shaped steel bracket |
| CN103924990A (en) * | 2014-05-07 | 2014-07-16 | 刘允勇 | High-intensity retractable support |
| CN103924990B (en) * | 2014-05-07 | 2016-04-06 | 刘允勇 | High strength compressibile support |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |