CN105422145A - U-steel yieldable support with resistance increase and energy absorption functions - Google Patents
U-steel yieldable support with resistance increase and energy absorption functions Download PDFInfo
- Publication number
- CN105422145A CN105422145A CN201511020036.7A CN201511020036A CN105422145A CN 105422145 A CN105422145 A CN 105422145A CN 201511020036 A CN201511020036 A CN 201511020036A CN 105422145 A CN105422145 A CN 105422145A
- Authority
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- China
- Prior art keywords
- curved beam
- side curved
- side arc
- shaped beams
- take
- Prior art date
- 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.)
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Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 25
- 239000010959 steel Substances 0.000 title claims abstract description 25
- 238000010521 absorption reaction Methods 0.000 title abstract description 11
- 230000000694 effects Effects 0.000 claims description 13
- 238000010008 shearing Methods 0.000 abstract 5
- 239000003245 coal Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Rod-Shaped Construction Members (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
A U-steel yieldable support with resistance increase and energy absorption functions is characterized in that resistance increase and energy absorption structures are arranged between external side arc-shaped beams and internal side arc-shaped beams, and the resistance increase and energy absorption structures are designed into a plurality of shearing energy absorption teeth; the shearing energy absorption teeth of the external side arc-shaped beams are uniformly distributed on the middle inner surfaces of the external side arc-shaped beams, and the inner surfaces of the end parts of the external side arc-shaped beams are designed into smooth surfaces; the shearing energy absorption teeth of the internal side arc-shaped beams are uniformly arranged on the middle outer surfaces of the internal side arc-shaped beams, and the outer surfaces of the end parts of the internal side arc-shaped beams are designed into smooth surfaces; the inner surfaces of the end parts of the external side arc-shaped beams are in lap joint with the outer surfaces of the end parts of the internal side arc-shaped beams, the shearing energy absorption teeth at the outermost ends of the middle inner surfaces of the external side arc-shaped beams are in contact with the end parts of the internal side arc-shaped beams, and the shearing energy absorption teeth at the outermost ends of the middle outer surfaces of the internal side arc-shaped beams are in contact with the end parts of the external side arc-shaped beams; guiding structures are arranged between the external side arc-shaped beams and the internal side arc-shaped beams; a constant-force limited block is arranged between an upper clamping block and a lower clamping block of each clamping cable, and the clamping cables realize constant-force output of a pre-tightening force via the constant-force limited blocks.
Description
Technical field
The invention belongs to safety of coal mines support technology field, particularly relate to a kind of U-shaped steel collapsible timbering with increasing resistance energy-absorbing effect.
Background technology
In recent years, along with continuing to increase of coal mine mining depth, roadway surrounding rock shows the mechanical characteristics such as distinctive heavily stressed, the large deformation of deep rock mass, high current sex change gradually, ore deposit pressure manifests day by day violent, adopts the drift support type of conventional to be more and more difficult to meet current safety in production needs.
For U-shaped steel collapsible timbering, conventional U-shaped steel collapsible timbering is made up of the Curved beam mutually overlapped, when bump occurs, impact energy is absorbed by the Curved beam that mutually overlaps is rubbing against one another, realize stepping down by the relative changing of the relative positions between Curved beam simultaneously, ensure the safety in tunnel with this.
But find in actual use, Curved beam is difficult to ensure in the frictional force of overlap.Because the size of frictional force is directly proportional to the normal stress size that Curved beam overlap bears, and the normal stress that Curved beam overlap bears equals the pretightning force that card cable exports, the friction factor of size also and between Curved beam overlap contact surface of frictional force is closely related simultaneously.In the Curved beam of conventional U-shaped steel collapsible timbering, external surface is all smooth surface, friction factor in theory between Curved beam overlap contact surface constant, but actual conditions are, owing to being subject to the impact of down-hole adverse circumstances, in Curved beam, external surface very easily gets rusty in dark moist environment, once get rusty, friction factor between Curved beam overlap contact surface will increase gradually, when bump exceedes the ultimate load that U-shaped steel collapsible timbering can bear, and the relative changing of the relative positions does not occur between Curved beam yet step down, now U-shaped steel collapsible timbering will there will be overall torsional deformation, thus cause the supporting of U-shaped steel collapsible timbering to be lost efficacy, this will have a strong impact on the safety in production in colliery.
Summary of the invention
For prior art Problems existing, the invention provides a kind of U-shaped steel collapsible timbering with increasing resistance energy-absorbing effect, resistance endergonic structure is increased by arranging between Curved beam, in order to increase the impact resistance between Curved beam, under impact loading, the shear energy-absorbing tooth increasing resistance endergonic structure carries out shear failure, realizes the absorption to impact energy, ensure that the supporting validity of U-shaped steel collapsible timbering.
To achieve these goals, the present invention adopts following technical scheme: a kind of have the U-shaped steel collapsible timbering increasing resistance energy-absorbing effect, comprise some Curved beams, some described Curved beams mutually overlap and form arch or closed ring, and be often all fixedly connected with by card cable between adjacent two Curved beams, described Curved beam is divided into outer taken side Curved beam and interiorly takes side Curved beam, is characterized in: described outer take side Curved beam and interior take to be provided with between the Curved beam of side increase resistance endergonic structure.
Described increasing resistance endergonic structure is set to some shear energy-absorbing teeth, described shear energy-absorbing tooth be separately positioned on outer take side Curved beam inner surface and in take the external surface of side Curved beam.
Described uniform being arranged at of shear energy-absorbing tooth of taking side Curved beam outward takes inner surface in the middle part of the Curved beam of side outward, takes side Curved beam terminal interior surface outward and is set to smooth surface; Take side Curved beam center outer surface in taking in described that the shear energy-absorbing tooth of side Curved beam is uniform and being arranged at, inside take side Curved beam end outer surface and be set to smooth surface; Side Curved beam end outer surface is taken in the described outer terminal interior surface taking side Curved beam is overlapped in, the outermost end shear energy-absorbing tooth taking inner surface in the middle part of the Curved beam of side outward contacts with interior Curved beam end, side of taking, the outermost end shear energy-absorbing tooth inside taking side Curved beam center outer surface with take Curved beam end, side outward and contact.
Outer side Curved beam is taken and interior taking between the Curved beam of side is provided with guide frame described.
Described guide frame comprises guide rail and gathering sill, described guide rail, gathering sill be arranged at respectively outer take side Curved beam, in take on the U-shaped arm of side Curved beam, and guide rail is positioned at gathering sill.
Described card cable wrap draws together fixture block, lower fixture block, bolt and nut, be connected by bolt and nut between described upper fixture block with lower fixture block, described outer side Curved beam and the interior side Curved beam of taking taken is between upper fixture block and lower fixture block, bolt between upper fixture block and lower fixture block is set with and determines power limited block, described card cable realizes pretightning force power of determining by determining power limited block exports.
Beneficial effect of the present invention:
The present invention is compared with existing U-shaped steel collapsible timbering, resistance endergonic structure is increased by arranging between Curved beam, in order to increase the impact resistance between Curved beam, under impact loading, the shear energy-absorbing tooth increasing resistance endergonic structure carries out shear failure, realize the absorption to impact energy, ensure that the supporting validity of U-shaped steel collapsible timbering; The present invention adds and determines power limited block in card cable, and the power of determining making card cable realize pretightning force by determining power limited block exports, and avoids the situation occurring pretightning force instability.
Accompanying drawing explanation
Fig. 1 is U-shaped steel collapsible timbering (overlap) structural representation with increasing resistance energy-absorbing effect of the present invention;
Fig. 2 is A-A sectional view in Fig. 1;
Fig. 3 is B-B sectional view in Fig. 1;
Fig. 4 is C-C sectional view in Fig. 1;
In figure, 1-card cable, 2-shear energy-absorbing tooth, 3-take side Curved beam outward, 4-inside take side Curved beam, 5-guide rail, 6-gathering sill, 7-upper fixture block, 8-lower fixture block, 9-bolt, 10-nut, 11-determine power limited block.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in figures 1-4, a kind of have the U-shaped steel collapsible timbering increasing resistance energy-absorbing effect, comprise some Curved beams, some described Curved beams mutually overlap and form arch or closed ring, and be often all fixedly connected with by card cable 1 between adjacent two Curved beams, described Curved beam is divided into outer taken side Curved beam 3 and interiorly takes side Curved beam 4, described outer take side Curved beam 3 and interior take to be provided with between side Curved beam 4 increase resistance endergonic structure.
Described increasing resistance endergonic structure is set to some shear energy-absorbing teeth 2, described shear energy-absorbing tooth 2 be separately positioned on outer take side Curved beam 3 inner surface and in take the external surface of side Curved beam 4.
Described uniform being arranged at of shear energy-absorbing tooth 2 of taking side Curved beam 3 outward takes inner surface in the middle part of side Curved beam 3 outward, takes side Curved beam 3 terminal interior surface outward and is set to smooth surface; Take side Curved beam 4 center outer surface in taking in described that the shear energy-absorbing tooth 2 of side Curved beam 4 is uniform and being arranged at, inside take side Curved beam 4 end outer surface and be set to smooth surface; Side Curved beam 4 end outer surface is taken in the described outer terminal interior surface taking side Curved beam 3 is overlapped in, the outermost end shear energy-absorbing tooth 2 taking inner surface in the middle part of side Curved beam 3 outward contacts with interior side Curved beam 4 end of taking, the outermost end shear energy-absorbing tooth 2 inside taking side Curved beam 4 center outer surface with take side Curved beam 3 end outward and contact.
Outer side Curved beam 3 is taken and interior taking between side Curved beam 4 is provided with guide frame described.
Described guide frame comprises guide rail 5 and gathering sill 6, described guide rail 5, gathering sill 6 be arranged at respectively outer take side Curved beam 3, in take on the U-shaped arm of side Curved beam 4, and guide rail 5 is positioned at gathering sill 6.
Described card cable 1 comprises fixture block 7, lower fixture block 8, bolt 9 and nut 10, be connected by bolt 9 and nut 10 between described upper fixture block 7 with lower fixture block 8, described outer side Curved beam 3 and the interior side Curved beam 4 of taking taken is between upper fixture block 7 and lower fixture block 8, bolt 9 between upper fixture block 7 and lower fixture block 8 is set with and determines power limited block 11, described card cable 1 realizes pretightning force power of determining by determining power limited block 11 exports.
Below in conjunction with accompanying drawing, a use procedure of the present invention is described:
Choose two joint Curved beams and carry out connection for example, card cable 1 prepares 5.
First by take outward side Curved beam 3 be overlapped in take on side Curved beam 4, ensure that the outer outermost end shear energy-absorbing tooth 2 taking inner surface in the middle part of side Curved beam 3 contacts with interior side Curved beam 4 end of taking, the outermost end shear energy-absorbing tooth 2 inside taking side Curved beam 4 center outer surface with take side Curved beam 3 end outward and contact, then 5 card cables 1 are installed to Curved beam overlap successively.
According to the actual coal mine roadway residing for the support installed, the pretightning force numerical value that card cable 1 computed in advance should export, according to the pre-processed power of the determining limited block 11 of this pretightning force numerical value, the size of determining power limited block 11 is that the pretightning force exported by card cable 1 is determined.
When being carried out pretightning force by card cable 1 and exporting, by spanner tightening nut 10, along with the continuous precession of nut 10, pretightning force constantly increases, and the spacing simultaneously gone up between fixture block 7 and lower fixture block 8 is compressed continuously, when upper fixture block 7 and lower fixture block 8 simultaneously with determine after power limited block 11 contacts, determined power limited block 11 due to compression stroke to limit, nut 10 cannot proceed precession, and the pretightning force that now card cable 1 exports will no longer change, and achieve and determine the object that power exports pretightning force.
Occur once bump, and when bump exceedes the ultimate load that U-shaped steel collapsible timbering can bear, there is the relative changing of the relative positions between Curved beam to step down, owing to being subject to the guide effect of guide rail 5 and gathering sill 6, take side Curved beam 3 outward to carry out along guide direction with the interior relative offset direction taking side Curved beam 4, ensure that accurately stepping down between Curved beam.
Taking side Curved beam 3 outside carries out while the relative changing of the relative positions steps down with interior side Curved beam 4 of taking, the shear energy-absorbing tooth 2 taking inner surface in the middle part of side Curved beam 3 outward starts, with interior side Curved beam 4 end of taking, shear action occurs, the shear energy-absorbing tooth 2 inside taking side Curved beam 4 center outer surface starts and takes side Curved beam 3 end outward shear action occurs, now shear energy-absorbing tooth 2 carries out shear failure under shear action, constantly can absorb the impact energy produced when bump acts on tunnel in the process, ensure that shrinkage strain reliability and the supporting validity of U-shaped steel collapsible timbering, make roadway surrounding rock form a kind of new equilibrium state to be more prone to, thus effectively ensure that the safety in production in colliery.
Scheme in embodiment is also not used to limit scope of patent protection of the present invention, and the equivalence that all the present invention of disengaging do is implemented or changed, and is all contained in the scope of the claims of this case.
Claims (6)
1. one kind has the U-shaped steel collapsible timbering increasing resistance energy-absorbing effect, comprise some Curved beams, some described Curved beams mutually overlap and form arch or closed ring, and be often all fixedly connected with by card cable between adjacent two Curved beams, described Curved beam is divided into outer taken side Curved beam and interiorly takes side Curved beam, it is characterized in that: described outer take side Curved beam and interior take to be provided with between the Curved beam of side increase resistance endergonic structure.
2. a kind of U-shaped steel collapsible timbering with increasing resistance energy-absorbing effect according to claim 1, it is characterized in that: described increasing resistance endergonic structure is set to some shear energy-absorbing teeth, described shear energy-absorbing tooth be separately positioned on outer take side Curved beam inner surface and in take the external surface of side Curved beam.
3. a kind of U-shaped steel collapsible timbering with increasing resistance energy-absorbing effect according to claim 2, it is characterized in that: described uniform being arranged at of shear energy-absorbing tooth of taking side Curved beam outward takes inner surface in the middle part of the Curved beam of side outward, takes side Curved beam terminal interior surface outward and is set to smooth surface; Take side Curved beam center outer surface in taking in described that the shear energy-absorbing tooth of side Curved beam is uniform and being arranged at, inside take side Curved beam end outer surface and be set to smooth surface; Side Curved beam end outer surface is taken in the described outer terminal interior surface taking side Curved beam is overlapped in, the outermost end shear energy-absorbing tooth taking inner surface in the middle part of the Curved beam of side outward contacts with interior Curved beam end, side of taking, the outermost end shear energy-absorbing tooth inside taking side Curved beam center outer surface with take Curved beam end, side outward and contact.
4. according to claim 1 a kind ofly have the U-shaped steel collapsible timbering increasing resistance energy-absorbing effect, it is characterized in that: take side Curved beam and interior taking between the Curved beam of side is provided with guide frame outward described.
5. a kind of U-shaped steel collapsible timbering with increasing resistance energy-absorbing effect according to claim 4, it is characterized in that: described guide frame comprises guide rail and gathering sill, described guide rail, gathering sill be arranged at respectively outer take side Curved beam, in take on the U-shaped arm of side Curved beam, and guide rail is positioned at gathering sill.
6. a kind of U-shaped steel collapsible timbering with increasing resistance energy-absorbing effect according to claim 1, it is characterized in that: described card cable wrap draws together fixture block, lower fixture block, bolt and nut, be connected by bolt and nut between described upper fixture block with lower fixture block, described outer side Curved beam and the interior side Curved beam of taking taken is between upper fixture block and lower fixture block, bolt between upper fixture block and lower fixture block is set with and determines power limited block, described card cable realizes pretightning force power of determining by determining power limited block exports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511020036.7A CN105422145B (en) | 2015-12-30 | 2015-12-30 | It is a kind of that there is the U-shaped steel collapsible timbering for increasing resistance energy-absorbing effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511020036.7A CN105422145B (en) | 2015-12-30 | 2015-12-30 | It is a kind of that there is the U-shaped steel collapsible timbering for increasing resistance energy-absorbing effect |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105422145A true CN105422145A (en) | 2016-03-23 |
| CN105422145B CN105422145B (en) | 2018-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511020036.7A Expired - Fee Related CN105422145B (en) | 2015-12-30 | 2015-12-30 | It is a kind of that there is the U-shaped steel collapsible timbering for increasing resistance energy-absorbing effect |
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2110084U (en) * | 1991-04-12 | 1992-07-15 | 淮南矿务局机械厂 | U-shap steel cable |
| CN2131980Y (en) * | 1992-08-13 | 1993-05-05 | 淮南市乳胶制品厂 | Rubber pad with u-steel frame |
| CN101245707A (en) * | 2008-01-24 | 2008-08-20 | 河南理工大学 | Yieldable rigidity commutation U shaped steel bracket overlap joint segment connecting method |
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| CN103321660A (en) * | 2013-06-25 | 2013-09-25 | 辽宁工程技术大学 | Mining constant-resistance yielding energy-absorbing impact-resisting supporting device |
| CN203239359U (en) * | 2013-04-15 | 2013-10-16 | 辽宁工程技术大学 | Anti-impact energy-absorption combined metal support for coal mining tunnel |
| CN103410536A (en) * | 2013-07-30 | 2013-11-27 | 冯世英 | Mining clamp cable |
| CN103541750A (en) * | 2013-10-21 | 2014-01-29 | 辽宁工程技术大学 | Alternately-distributed energy-absorbing overlength combined anchor rod for mining and application method |
| CN103821542A (en) * | 2014-03-13 | 2014-05-28 | 辽宁工程技术大学 | Anti-collision support with corrugated face |
| CN203891902U (en) * | 2014-05-07 | 2014-10-22 | 刘允勇 | High-strength extensible support |
| CN104763450A (en) * | 2015-02-04 | 2015-07-08 | 辽宁工程技术大学 | Constant-force U-shaped steel clamping rope |
| CN105041350A (en) * | 2015-06-02 | 2015-11-11 | 辽宁工程技术大学 | Hydraulic prop having anchoring force energy-absorbing buffering function |
| CN205349379U (en) * | 2015-12-30 | 2016-06-29 | 辽宁工程技术大学 | U shaped steel yieldable support with resistance -increasing energy -absorbing efficiency |
-
2015
- 2015-12-30 CN CN201511020036.7A patent/CN105422145B/en not_active Expired - Fee Related
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2110084U (en) * | 1991-04-12 | 1992-07-15 | 淮南矿务局机械厂 | U-shap steel cable |
| CN2131980Y (en) * | 1992-08-13 | 1993-05-05 | 淮南市乳胶制品厂 | Rubber pad with u-steel frame |
| CN101245707A (en) * | 2008-01-24 | 2008-08-20 | 河南理工大学 | Yieldable rigidity commutation U shaped steel bracket overlap joint segment connecting method |
| CN201661301U (en) * | 2010-03-15 | 2010-12-01 | 徐州矿务集团有限公司 | U-shaped steel bracket for controlling expansion of buffering cushion block filled in large-deformation soft rock tunnel |
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| CN202882954U (en) * | 2012-09-05 | 2013-04-17 | 淮南联合大学 | U-shaped steel support |
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| CN103321660A (en) * | 2013-06-25 | 2013-09-25 | 辽宁工程技术大学 | Mining constant-resistance yielding energy-absorbing impact-resisting supporting device |
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| CN103541750A (en) * | 2013-10-21 | 2014-01-29 | 辽宁工程技术大学 | Alternately-distributed energy-absorbing overlength combined anchor rod for mining and application method |
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| CN104763450A (en) * | 2015-02-04 | 2015-07-08 | 辽宁工程技术大学 | Constant-force U-shaped steel clamping rope |
| CN105041350A (en) * | 2015-06-02 | 2015-11-11 | 辽宁工程技术大学 | Hydraulic prop having anchoring force energy-absorbing buffering function |
| CN205349379U (en) * | 2015-12-30 | 2016-06-29 | 辽宁工程技术大学 | U shaped steel yieldable support with resistance -increasing energy -absorbing efficiency |
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| CN105422145B (en) | 2018-01-09 |
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Granted publication date: 20180109 |