CN106121690A - A kind of leg unit for supporting dead zone and the method for supporting dead zone - Google Patents
A kind of leg unit for supporting dead zone and the method for supporting dead zone Download PDFInfo
- Publication number
- CN106121690A CN106121690A CN201610550365.0A CN201610550365A CN106121690A CN 106121690 A CN106121690 A CN 106121690A CN 201610550365 A CN201610550365 A CN 201610550365A CN 106121690 A CN106121690 A CN 106121690A
- Authority
- CN
- China
- Prior art keywords
- dead zone
- seat board
- lower seat
- base plate
- upper base
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000011435 rock Substances 0.000 claims abstract description 17
- 239000004567 concrete Substances 0.000 claims description 48
- 238000010276 construction Methods 0.000 claims description 7
- 238000005381 potential energy Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 abstract description 3
- 238000013016 damping Methods 0.000 abstract description 3
- 238000005452 bending Methods 0.000 abstract description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 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
- E21D15/02—Non-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
- E21D15/005—Props; Chocks, e.g. made of flexible containers filled with backfilling material characterised by the material
-
- 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
- E21D15/54—Details of the ends of props
- E21D15/55—Details of the ends of props of prop heads or feet
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)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a kind of leg unit for supporting dead zone, including the pillar being installed within dead zone, the upper end of pillar is fixedly connected with spring fastening, and the top of spring fastening can contact with top, dead zone country rock；Described spring fastening includes upper base plate and lower seat board, and upper base plate can contact with top, dead zone country rock, and lower seat board is connected with pillar upper end；Being installed on spring between described upper base plate and lower seat board, the upper end of spring is connected with upper base plate, and the lower end of spring is connected with lower seat board；Upper base plate is connected with adjusting nut cooperation by connecting bolt with lower seat board.A kind of method that the invention also discloses supporting dead zone.The invention have the benefit that the spring fastening original state in the present invention is compressive state, gather substantial amounts of elastic energy, the impact on pillar of live load, moment of flexure and lateral load can be reduced, there is higher buffering and damping property, prevent pillar from bending and press quick-fried and lost efficacy.
Description
Technical field
The present invention relates to support technology field, underground construction hollow area, be specifically related to a kind of pillar for supporting dead zone dress
Put and the method for supporting dead zone.
Background technology
Along with the development of China's mining industry, underground job gets more and more.When carrying out underground job, due to underground
Rock And Soil character is complicated, is different from earth's surface, it is impossible to the support theory on application earth's surface completely.Therefore, how to realize underground sky
The safety support in district is the difficult point of underground construction.
A nursing of traditional " resisting stubbornly for strong " is the most extensively continued to use in supporting currently for work surface dead zone, sub-terrain mines ground
Opinion, i.e. uses the pillars such as reinforced concrete pile, timber and monomer hydraulic to carry out supporting.But, in traditional method for protecting support,
Little with upper supporting column deformation, rigidity is big, is not only difficult to effectively play " self-supporting " effect of country rock, and at the work of underground bump
Under with, pillar is easy to bend quick-fried and lost efficacy；It addition, each pillar carrying in dead zone is uneven so that partial struts is because being subject to
The bearing capacity arrived premature degradation greatly, causes top, dead zone wall damage, jeopardizes the safety of workmen.
Summary of the invention
It is an object of the invention to, for the deficiencies in the prior art, it is provided that a kind of good stability for supporting dead zone
Leg unit and the method for supporting dead zone.
Present invention provide the technical scheme that a kind of leg unit for supporting dead zone, including being installed in inside dead zone
Pillar, the upper end of pillar is fixedly connected with spring fastening, and the top of spring fastening can contact with top, dead zone country rock.
By such scheme, described spring fastening includes upper base plate and lower seat board, and upper base plate can connect with top, dead zone country rock
Touching, lower seat board is connected with pillar upper end；It is installed on spring, the upper end of spring and upper base plate phase between described upper base plate and lower seat board
Even, the lower end of spring is connected with lower seat board；Upper base plate is connected with adjusting nut cooperation by connecting bolt with lower seat board；Described bullet
Spring is in confined state all the time.
By such scheme, described upper base plate and lower seat board offer connecting hole respectively, and the two ends of connecting bolt are worn respectively
Go out upper base plate and the connecting hole of lower seat board, match with adjusting nut.
By such scheme, described lower seat board offering connecting hole, the upper end of described connecting bolt is connected with upper base plate, even
The lower end of connecting bolt coordinates with adjusting nut after passing the connecting hole of lower seat board.
By such scheme, described upper base plate and lower seat board are made by Q235-C shape steel plate；Upper base plate and the thickness of lower seat board
Degree is 20 ~ 25mm.
A kind of method of supporting dead zone, specifically includes following steps:
Step one, provide leg unit as above:
(1), the correct position in dead zone sets up concrete column template；
(2), in concrete column template casting concrete, form concrete pillar, and in the upper end of concrete pillar and dead zone
Preset clearance between the country rock of top；
(3), according to the practice of construction situation of dead zone, spring fastening is made, it is ensured that the following table of the upper surface of upper base plate and lower seat board
Distance between face is not more than the height of preset clearance；
(4), described spring fastening being placed in the upper end of concrete pillar, phase is fixed in the upper end of lower seat board and concrete pillar
Even；
Step 2, regulation adjusting nut position on bolt, increase the distance between upper base plate and lower seat board, release spring
Elastic potential energy, makes upper base plate contact with the top country rock of dead zone, provides support force for dead zone.
By such scheme, in step one, the center of described lower seat board and the center superposition of concrete pillar upper surface.
By such scheme, in step one, the height of preset clearance is 20cm；Under the upper surface of upper base plate and lower seat board
Distance between surface is 15 ~ 20cm.
By such scheme, the upper surface of described concrete pillar is rectangle, and described lower seat board is corresponding rectangle, lower seat board
1 ~ 2 times that the length of side is the concrete pillar upper surface length of side.
By such scheme, the upper surface of described concrete pillar is circular, and described lower seat board is corresponding disc, lower seat
1 ~ 2 times of a diameter of concrete pillar upper surface diameter of plate.
The invention have the benefit that 1) spring fastening original state in the present invention is compressive state, gathers substantial amounts of
Elastic energy, can reduce the impact on pillar of live load, moment of flexure and lateral load, have higher buffering and damping property, prevent
Pillar bends quick-fried and lost efficacy；2) controlled the distance of upper and lower seat board by adjusting nut, and realize pillar under the action of the spring
Connect top with dead zone, solve the problem that artificial post difficulty connects top；3) good reliability of the present invention, simple in construction, construction technology process short,
Low cost, has good economic benefit and social benefit, applied widely.
Accompanying drawing explanation
Fig. 1 is the structural representation of one specific embodiment of the present invention.
Fig. 2 is the structural representation of spring fastening in the present invention.
Wherein: 1, upper base plate；2, concrete pillar；3, connecting bolt；4, lower seat board；5, spring；6, adjusting nut.
Detailed description of the invention
In order to be more fully understood that the present invention, with specific embodiment, the present invention is further described below in conjunction with the accompanying drawings.
A kind of leg unit for supporting dead zone as described in Figure 1, including the pillar being installed within dead zone, pillar
Upper end is fixedly connected with spring fastening, and the upper end of spring fastening can contact with the top country rock of dead zone.As shown in Figure 2, described bullet
Spring bearing includes upper base plate 1 and lower seat board 4, and upper base plate 1 can contact with top, dead zone country rock, and lower seat board 4 is solid with pillar upper end
Even, being installed on spring 5 between upper base plate 1 and lower seat board 4, the upper end of spring 5 is connected with upper base plate 1 (solderable), spring 5 times
End is connected (solderable) with lower seat board 4；Upper base plate 1 is connected with adjusting nut 6 cooperation by connecting bolt 3 with lower seat board 4；Described
Spring 5 is in confined state all the time.
In the present invention, described upper base plate 1 and lower seat board 4 offer connecting hole respectively, and the two ends of connecting bolt 3 are worn respectively
Go out upper base plate 1 and the connecting hole of lower seat board 4, match with adjusting nut 6；The upper end that may also be connecting bolt 3 is solid with upper base plate 1
Even, the lower end of connecting bolt 3 coordinates with adjusting nut 6 after passing the connecting hole of lower seat board 4.By controlling the tune at lower seat board 4
The whole nut 6 position on connecting bolt 3, changes the distance between upper base plate 1 and lower seat board 4.
In the present invention, described upper base plate 1 and lower seat board 4 are made by Q235-C shape steel plate；Upper base plate 1 and lower seat board 4
Thickness is 20 ~ 25mm.
A kind of method of supporting dead zone, the method comprises the following steps:
Step one, provide leg unit as above:
(1), the correct position in dead zone sets up concrete column template；
(2), in concrete column template casting concrete (C25 concrete can be used), form concrete pillar 2, and make coagulation
Preset clearance between upper end and top, the dead zone country rock of soil pillar 2, depending on the height in this gap is according to practical situation；
(3), according to the practice of construction situation of dead zone, spring fastening described above is made, it is ensured that the height (institute of described spring fastening
State the distance of the upper surface that height is upper base plate 1 of spring fastening and the lower surface of lower seat board 4) be not more than preset clearance height
Degree；
(4), described spring fastening being placed in the upper end of concrete pillar 2, lower seat board 4 is fixedly linked with concrete pillar 2；
Adjusting nut 6 at step 2, tune Panasonic seat board 4, increases the distance between upper base plate 1 and lower seat board 4, discharges spring 5
Elastic potential energy, make upper base plate 1 contact with the top country rock of dead zone, for dead zone provide support force.
In the step one of the present invention, the center of described lower seat board 4 and the center superposition of concrete pillar 2 upper surface.
In the step one of the present invention, the height of preset clearance is 20cm, upper base plate 1 upper surface to lower seat board 4 lower surface it
Between distance be 15 ~ 20cm.
In the present invention, the mating shapes of concrete pillar 2 upper surface shape and upper and lower seat board, and lower seat board 4 and the seat of honour
Plate 1 size, area are identical, are all higher than the upper surface area of concrete pillar 2.If the upper surface of concrete pillar 2 is rectangle, institute
Stating lower seat board 4 with upper base plate 1 is also corresponding rectangle, and the length of side of upper base plate 1 and lower seat board 4 is limit, concrete pillar 2 upper surface
1 ~ 2 times of long (this length of side is the length of side corresponding with lower seat board 4)；The upper surface of concrete pillar 2 is circular, described upper and lower seat board
Being disc, the diameter of upper base plate 1 and lower seat board 4 is 1 ~ 2 times of concrete pillar 2 upper surface diameter, as concrete props up
The a diameter of 2000mm in post 2 upper surface, the diameter of upper base plate 1 and lower seat board 4 can be all 2200mm.For upper base plate 1, its diameter
(or length of side) should be more than 1 times of its lower concrete pillar 2 upper surface diameter (length of side), to increase and being subject to of top, dead zone country rock
Power area；For lower seat board 4, its diameter (length of side) should be 1 times of its lower concrete pillar 2 upper surface diameter (or length of side) with
On, it is ensured that the surrounding of concrete pillar 2 has sufficient space to be conveniently adjusted the regulation of nut 6；The diameter (or length of side) of seat board up and down
Less than 2 times of its lower concrete pillar 2 upper surface diameter (or length of side), prevent size and the concrete pillar 2 of lower seat board 4
Size has big difference, and causes unbalance stress, makes concrete pillar 2 destroy ahead of time.
In the present invention, selecting the spring steel of suitable types to make spring 5 according to Practical Project situation, spring 5 uses specification
Make for a kind of spring steel therein such as 55Si2Mn, 60Si2Mn, 60Si2MnA, 60Si2CrA, 60Si2CrVA, strong to ensure
Degree and elasticity.Specification is the spring steel intensity height of 55Si2Mn, 60Si2Mn, 60Si2MnA, good springiness；Specification be 60Si2CrA,
The characteristic that the spring steel of 60Si2CrVA has high intensity, quenching degree is good.
In the present invention, spring 5 original state in described spring fastening is that (original state compression degree is for compressive state
Greatly), gather substantial amounts of elastic potential energy, buffering and vibration damping can be realized, live load, moment of flexure and lateral load can be reduced concrete is propped up
The impact of post 2, effectively prevents concrete pillar 2 to lose efficacy because pressure of bending is quick-fried.
These are only the preferred embodiments of the present invention, not thereby limit the scope of the claims of the present invention, every utilize this
Equivalent structure or equivalence flow process that bright description and accompanying drawing content are made convert, or it is relevant to be directly or indirectly used in other
Technical field, be the most in like manner included in the scope of patent protection of the present invention.
Claims (10)
1. the leg unit for supporting dead zone, it is characterised in that include the pillar being installed within dead zone, pillar upper
End is fixedly connected with spring fastening, and the top of spring fastening can contact with top, dead zone country rock.
A kind of leg unit for supporting dead zone, it is characterised in that described spring fastening includes
Upper base plate and lower seat board, upper base plate can contact with top, dead zone country rock, and lower seat board is connected with pillar upper end；Described upper base plate and
Being installed on spring between lower seat board, the upper end of spring is connected with upper base plate, and the lower end of spring is connected with lower seat board；Upper base plate and under
Seat board is connected with adjusting nut cooperation by connecting bolt；Described spring is in confined state all the time.
A kind of leg unit for supporting dead zone, it is characterised in that described upper base plate and lower seat
Plate offers connecting hole respectively, and the two ends of connecting bolt pass upper base plate and the connecting hole of lower seat board respectively, with adjusting nut
Match.
A kind of leg unit for supporting dead zone, it is characterised in that offer on described lower seat board
Having a connecting hole, the upper end of described connecting bolt is connected with upper base plate, the lower end of connecting bolt pass after the connecting hole of lower seat board with
Adjusting nut coordinates.
A kind of leg unit for supporting dead zone, it is characterised in that described upper base plate and lower seat
Plate is made by Q235-C shape steel plate；The thickness of upper base plate and lower seat board is 20 ~ 25mm.
6. the method for a supporting dead zone, it is characterised in that specifically include following steps:
Step one, offer leg unit described in claim 1 ~ 5:
(1), the correct position in dead zone sets up concrete column template；
(2), in concrete column template casting concrete, form concrete pillar, and in the upper end of concrete pillar and dead zone
Preset clearance between the country rock of top；
(3), according to the practice of construction situation of dead zone, spring fastening is made, it is ensured that the following table of the upper surface of upper base plate and lower seat board
Distance between face is not more than the height of preset clearance；
(4), described spring fastening being placed in the upper end of concrete pillar, phase is fixed in the upper end of lower seat board and concrete pillar
Even；
Step 2, regulation adjusting nut position on bolt, increase the distance between upper base plate and lower seat board, release spring
Elastic potential energy, makes upper base plate contact with the top country rock of dead zone, provides support force for dead zone.
The method of a kind of supporting dead zone the most as claimed in claim 6, it is characterised in that in step one, described lower seat board
Center and the center superposition of concrete pillar upper surface.
The method of a kind of supporting dead zone the most as claimed in claim 6, it is characterised in that in step one, the height of preset clearance
Degree is 20cm；Distance between upper surface and the lower surface of lower seat board of upper base plate is 15 ~ 20cm.
The method of a kind of supporting dead zone the most as claimed in claim 6, it is characterised in that the upper surface of described concrete pillar is
Rectangle, described lower seat board is corresponding rectangle, and the length of side of lower seat board is 1 ~ 2 times of the concrete pillar upper surface length of side.
The method of a kind of supporting dead zone the most as claimed in claim 6, it is characterised in that the upper surface of described concrete pillar
For circle, described lower seat board is corresponding disc, 1 ~ 2 times of a diameter of concrete pillar upper surface diameter of lower seat board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610550365.0A CN106121690A (en) | 2016-07-13 | 2016-07-13 | A kind of leg unit for supporting dead zone and the method for supporting dead zone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610550365.0A CN106121690A (en) | 2016-07-13 | 2016-07-13 | A kind of leg unit for supporting dead zone and the method for supporting dead zone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106121690A true CN106121690A (en) | 2016-11-16 |
Family
ID=57283115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610550365.0A Pending CN106121690A (en) | 2016-07-13 | 2016-07-13 | A kind of leg unit for supporting dead zone and the method for supporting dead zone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106121690A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107013234A (en) * | 2017-05-12 | 2017-08-04 | 武汉工程大学 | A kind of tunnel diagonal brace device and method for protecting support |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU653403A1 (en) * | 1977-12-08 | 1979-03-25 | Подмосковный Научно-Исследовательский И Проектно-Конструкторский Угольный Институт | Roof of mine powered support section |
| KR20010111157A (en) * | 2000-06-08 | 2001-12-17 | 강보식 | Spring support for slab |
| CN201826862U (en) * | 2010-10-28 | 2011-05-11 | 辽宁工程技术大学 | Demising buffering and power-absorbing single hydraulic bracket device |
| CN201826863U (en) * | 2010-10-28 | 2011-05-11 | 辽宁工程技术大学 | Fully mechanized mining hydraulic support device capable of abdicating and buffering |
| CN202832571U (en) * | 2012-09-05 | 2013-03-27 | 安徽理工大学 | Coalface support for similar material simulation test |
| CN103306693A (en) * | 2013-06-29 | 2013-09-18 | 辽宁工程技术大学 | Mining double energy absorption anti-shocking beam |
| CN203296778U (en) * | 2013-05-20 | 2013-11-20 | 山东科技大学 | Rigid-flexible combination gob-side entry retaining roadway-side shoring device |
| CN104100281A (en) * | 2014-06-16 | 2014-10-15 | 山东科技大学 | Mining multilevel pressure-relief anti-scouring support device, support system and use methods thereof |
| CN104533475A (en) * | 2014-11-13 | 2015-04-22 | 三一重型装备有限公司 | Hydraulic bracket |
-
2016
- 2016-07-13 CN CN201610550365.0A patent/CN106121690A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU653403A1 (en) * | 1977-12-08 | 1979-03-25 | Подмосковный Научно-Исследовательский И Проектно-Конструкторский Угольный Институт | Roof of mine powered support section |
| KR20010111157A (en) * | 2000-06-08 | 2001-12-17 | 강보식 | Spring support for slab |
| CN201826862U (en) * | 2010-10-28 | 2011-05-11 | 辽宁工程技术大学 | Demising buffering and power-absorbing single hydraulic bracket device |
| CN201826863U (en) * | 2010-10-28 | 2011-05-11 | 辽宁工程技术大学 | Fully mechanized mining hydraulic support device capable of abdicating and buffering |
| CN202832571U (en) * | 2012-09-05 | 2013-03-27 | 安徽理工大学 | Coalface support for similar material simulation test |
| CN203296778U (en) * | 2013-05-20 | 2013-11-20 | 山东科技大学 | Rigid-flexible combination gob-side entry retaining roadway-side shoring device |
| CN103306693A (en) * | 2013-06-29 | 2013-09-18 | 辽宁工程技术大学 | Mining double energy absorption anti-shocking beam |
| CN104100281A (en) * | 2014-06-16 | 2014-10-15 | 山东科技大学 | Mining multilevel pressure-relief anti-scouring support device, support system and use methods thereof |
| CN104533475A (en) * | 2014-11-13 | 2015-04-22 | 三一重型装备有限公司 | Hydraulic bracket |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107013234A (en) * | 2017-05-12 | 2017-08-04 | 武汉工程大学 | A kind of tunnel diagonal brace device and method for protecting support |
| CN107013234B (en) * | 2017-05-12 | 2024-03-26 | 武汉工程大学 | Roadway diagonal bracing supporting device and supporting method |
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Application publication date: 20161116 |