CN103485801B - For the roadway support device of workings subject to dy namic pressure and gob side entry retaining - Google Patents
For the roadway support device of workings subject to dy namic pressure and gob side entry retaining Download PDFInfo
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- CN103485801B CN103485801B CN201310376587.1A CN201310376587A CN103485801B CN 103485801 B CN103485801 B CN 103485801B CN 201310376587 A CN201310376587 A CN 201310376587A CN 103485801 B CN103485801 B CN 103485801B
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- hollow steel
- steel pipe
- concrete
- wood
- roadway
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- 230000003245 working effect Effects 0.000 title abstract 4
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 72
- 239000010959 steel Substances 0.000 claims abstract description 72
- 239000002023 wood Substances 0.000 claims description 27
- 230000008901 benefit Effects 0.000 abstract description 6
- 230000004308 accommodation Effects 0.000 abstract 2
- 239000000725 suspension Substances 0.000 abstract 2
- 238000005516 engineering process Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
- 239000003245 coal Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000011435 rock Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a kind of roadway support device for workings subject to dy namic pressure and gob side entry retaining, be used in the tunnel of workings subject to dy namic pressure and gob side entry retaining as suspension device, this device comprises: hollow steel tube pillar, the cavity of described hollow steel tube pillar is concrete accommodation space, the bottom of hollow steel tube pillar is provided with the grouting port be communicated with the cavity of described hollow steel tube pillar, and the top of hollow steel tube pillar is provided with the steam vent be communicated with the cavity of described hollow steel tube pillar; Concrete setting body is filled with in the concrete accommodation space of the cavity of described hollow steel tube pillar.Arrange between further tubular steel post and back and allow pressure layer, generally between steel strut and roadway floor use post footwear.This suspension device by being filled with concrete setting body in hollow steel tube pillar, has that support force is large, fast, the reusable advantage of good stability, speed of application, can the tunnel of effective support workings subject to dy namic pressure and gob side entry retaining.
Description
Technical Field
The invention relates to the field of mine roadway support, in particular to a roadway support device suitable for a dynamic pressure roadway and a gob-side entry retaining in a mine.
Background
The dynamic pressure roadway support is one of the difficult problems of coal mine roadway support, the gob-side entry retaining technology can well realize the non-coal-pillar lane protection, and the gob-side entry retaining technology is a great improvement of the coal mining technology, can reasonably develop coal resources, improves the extraction rate of the coal resources, and is beneficial to mine safety production and mine economic benefit improvement.
The existing gob-side entry retaining support technology mainly comprises an anchor net cable support technology and a roadside filling technology, wherein the anchor net cable support technology can strengthen the strength of surrounding rocks, improve the bearing capacity of broken surrounding rocks and adapt to larger deformation of the surrounding rocks; the roadside filling technology has the advantages of high early strength, high resistance increasing speed and good effect of sealing the gob.
However, the above prior arts all have the following disadvantages: the actual support strength is insufficient, the roadway deformation is large, the operation procedure is complicated, and the construction speed is low.
Disclosure of Invention
The invention aims to solve the technical problem of providing a roadway support device for dynamic pressure roadways and gob-side entry retaining, which has the advantages of good stability, high construction speed and reusability, and can solve the problems of insufficient support strength, large roadway deformation, slow construction and complex operation of the existing support.
In order to solve the above technical problems, the present invention provides a roadway support device for dynamic pressure roadway and gob-side entry retaining, comprising:
the concrete pouring device comprises a hollow steel pipe strut, a concrete pouring hole and a concrete pouring hole, wherein the hollow part of the hollow steel pipe strut is a concrete accommodating space, the lower part of the hollow steel pipe strut is provided with a grouting hole communicated with the hollow part of the hollow steel pipe strut, and the top of the hollow steel pipe strut is provided with an exhaust hole communicated with the hollow part of the hollow steel pipe strut;
and a concrete solidification body is filled in the concrete accommodating space of the hollow part of the hollow steel pipe support.
The invention has the beneficial effects that: set up the concrete in through the cavity steel pipe pillar, form a concrete filled steel pipe pillar of strutting dynamic pressure tunnel and gob entry, this kind of concrete filled steel pipe pillar has advantages such as the holding power is big, stability is good, construction speed is fast, repeatedly usable, can effectively strut the tunnel of dynamic pressure tunnel and gob entry.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic structural view of a roadway support device provided in an embodiment of the present invention;
fig. 2 is a sectional view of a hollow steel pipe column of a roadway support device according to an embodiment of the present invention;
fig. 3 is a schematic view of a yielding layer of the roadway support device provided in the embodiment of the present invention;
fig. 4 is a schematic column shoe diagram of a roadway support device provided in an embodiment of the present invention;
fig. 5 is a schematic view of the roadway support device provided by the embodiment of the invention in grouting underground;
the parts corresponding to the reference numerals in the figures are: 1-letting lamination; 2-column shoe; 3-grouting port; 4-air vent; 5-hollow steel pipe support; 6-iron plate; 7-angle steel; 8-a wood block; 9-wood wedge; 10-wedge angle of inclination; 11-concrete filled steel tube pillars; 12-grouting pump; 13-roadway roof; and 14-roadway floor.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a roadway support device for a dynamic pressure roadway and a gob-side entry retaining, as shown in fig. 1 and 2, the device includes: a hollow steel pipe pillar 5, wherein the hollow part of the hollow steel pipe pillar 5 is a concrete accommodating space, the lower part of the hollow steel pipe pillar 5 is provided with a grouting port 3 communicated with the hollow part of the hollow steel pipe pillar 5, and the top of the hollow steel pipe pillar 5 is provided with an exhaust hole 4 communicated with the hollow part of the hollow steel pipe pillar 5; the concrete containing space of the hollow part of the hollow steel pipe strut 5 is filled with concrete concretion.
The above-mentioned support device still includes: allowing the laminate 1 and the shoe 2; wherein,
the pressure-yielding layer 1 is arranged at the top end of the hollow steel pipe support 5;
the column shoe 2 is arranged at the bottom end of the hollow steel pipe strut 5.
As shown in fig. 3, in the supporting device, the pressure layer 1 is made of a wood block, the wood block is composed of a wood cushion block 8 with an inclined top surface and a wood wedge block 9 with an inclined bottom surface, and the inclined top surface of the wood cushion block 8 is matched with the inclined bottom surface of the wood wedge block 9. The wood block with the structure can be conveniently inserted between the top end of the hollow steel pipe support post 5 and the top plate of the roadway when the hollow steel pipe support post 5 supports the roadway.
As shown in fig. 4, in the above-described support device, the shoe 2 is formed of a square plate and a projection provided at a middle portion thereof, and the projection has a ring shape that matches a foot of the hollow steel pipe column. The column base with the structure can increase the contact area between the bottom of the hollow steel pipe support column 5 and the roadway bottom plate, increase the supporting stability of the hollow steel pipe support column 5 and prevent the hollow steel pipe support column 5 from being inserted into the roadway bottom plate due to overlarge bearing pressure.
The supporting device of the present invention will be further described with reference to specific embodiments.
The structure of the support device for the dynamic pressure roadway and the gob-side entry retaining roadway of the embodiment of the invention is shown in figure 1, a concrete-filled steel tube support is formed by pouring and filling concrete concretions into a hollow steel tube support, the lower part of the steel tube support is provided with a grouting port 3, the top part of the steel tube support is provided with an exhaust hole 4 (shown in figure 2), concrete can be poured underground, the top part of the hollow steel tube support can be provided with a pressure-yielding layer to fill a gap between the top part of the hollow steel tube support and a roadway top plate, the pressure-yielding layer can use a wood block 1, and a column shoe 2 is arranged between the bottom part of the hollow steel tube support and.
As shown in fig. 5, the laminated wood blocks are two wedge-shaped wood blocks to play a role in yielding, the compressible amount of the wood blocks is equal to the allowable sinking amount of the roadway roof, and the inclination angle 10 of the wood cushion block 8 and the wood wedge 9 is smaller than the friction self-locking angle of the wood blocks.
As shown in fig. 4, the column shoe is composed of a steel plate 6 welded with angle irons 7 to prevent the hollow steel pipe support 5 from being inserted into the roadway floor due to excessive bearing pressure.
The length of the support is determined according to the height of the roadway, but the length-diameter ratio is ensured to be not more than 12 so as to prevent the pressure rod from being unstable.
As shown in figure 5, the concrete-filled steel tube support formed by the support device can adopt a down-hole pouring process, a hollow steel tube support 5 is firstly installed during construction and supported between a top plate 13 and a bottom plate 14 of a roadway, dozens of steel tube supports are installed and then are connected with a grouting opening 3 by a concrete pump 12 for jacking and pouring, concrete grout is sprayed out of an exhaust hole 4, and pouring can be stopped after the concrete-filled steel tube support is completely filled.
In the process of supporting the steel pipe concrete support, when the support is found to be bent and deformed, a slightly thinner yielding wood block or a slightly shorter hollow steel pipe support can be replaced in time.
According to the supporting device disclosed by the embodiment of the invention, the concrete is poured into the hollow steel pipe support to form the steel pipe concrete support dynamic pressure roadway and the gob-side entry retaining roadway, and the support has large supporting force due to the hoop action of the steel pipe on the concrete; a compressible layer, namely a skid block, is reserved between the supporting column and the roadway top plate, so that the yielding effect can be achieved, a certain sinking amount of the top plate can be allowed, and the supporting column load is reduced. The length of the support is determined according to the roadway, but the length-diameter ratio should not exceed 12, so that the instability of the pressure rod is prevented, and the stability of the support is guaranteed. The concrete-filled steel tube pillars are grouted underground, after dozens of steel tube pillars are installed, concrete pouring of the pillars is carried out one by one, and the centralized pouring construction process is adopted, so that the pouring speed is high. When the support is found to be bent, a slightly thinner wood cushion block or a slightly shorter support can be replaced in time. The measures can ensure the effective use of the concrete-filled steel tube support column.
The supporting device of the embodiment of the invention has the advantages of large supporting force, good stability, high construction speed and reusability by filling the concrete concretion in the hollow steel pipe support, and can effectively support the dynamic pressure roadway and the roadway of the gob-side entry retaining.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (2)
1. The utility model provides a roadway support device that is used for dynamic pressure tunnel and gob-side entry retaining, its characterized in that includes:
the concrete pouring device comprises a hollow steel pipe strut, a concrete pouring hole and a concrete pouring hole, wherein the hollow part of the hollow steel pipe strut is a concrete accommodating space, the lower part of the hollow steel pipe strut is provided with a grouting hole communicated with the hollow part of the hollow steel pipe strut, and the top of the hollow steel pipe strut is provided with an exhaust hole communicated with the hollow part of the hollow steel pipe strut;
concrete concretion is filled in the concrete containing space of the hollow part of the hollow steel pipe strut;
further comprising: allowing the laminate and the shoe to stand; wherein the pressure-yielding layer is arranged at the top end of the hollow steel pipe support; the column shoe is arranged at the bottom end of the hollow steel tube strut; the pressure yielding layer is made of a wood block, the wood block is composed of a wood cushion block with an inclined top surface and a wood wedge block with an inclined bottom surface, the inclined top surface of the wood cushion block is matched with the inclined bottom surface of the wood wedge block, and the inclination angle of the wood cushion block and the wood wedge block is smaller than the friction self-locking angle of the wood block; the column shoe is composed of a square plate body and a protruding portion arranged in the middle of the square plate body, the protruding portion is annular, and the annular shape is matched with the bottom foot of the hollow steel pipe support.
2. The roadway support apparatus for dynamic pressure roadway and gob-side entry retaining according to claim 1, wherein the hollow steel pipe struts have an aspect ratio of not more than 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310376587.1A CN103485801B (en) | 2013-08-26 | 2013-08-26 | For the roadway support device of workings subject to dy namic pressure and gob side entry retaining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310376587.1A CN103485801B (en) | 2013-08-26 | 2013-08-26 | For the roadway support device of workings subject to dy namic pressure and gob side entry retaining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103485801A CN103485801A (en) | 2014-01-01 |
| CN103485801B true CN103485801B (en) | 2016-01-20 |
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| CN201310376587.1A Expired - Fee Related CN103485801B (en) | 2013-08-26 | 2013-08-26 | For the roadway support device of workings subject to dy namic pressure and gob side entry retaining |
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| CN103758539A (en) * | 2014-01-26 | 2014-04-30 | 河南大有能源股份有限公司常村煤矿 | Steel belt for bolt-grouting supporting |
| 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 |
| CN104832188B (en) * | 2015-04-17 | 2017-02-01 | 中国矿业大学(北京) | Concrete filled steel tube roadside support system used for large-section gob-side entry retaining and support method thereof |
| CN105840217A (en) * | 2016-04-28 | 2016-08-10 | 天地科技股份有限公司 | Coal tunnel supporting device and method |
| CN106285738B (en) * | 2016-09-28 | 2018-10-16 | 山东科技大学 | A kind of " steel reinforced concrete-hydraulic pressure " roadside support device and method for protecting support for deep tunnel |
| CN106677804B (en) * | 2017-02-23 | 2019-03-29 | 山东建筑大学 | A kind of gob side entry retaining roadside support system and its construction method |
| CN107905825A (en) * | 2017-10-31 | 2018-04-13 | 山东里能鲁西矿业有限公司 | It is a kind of new for no coal pillar mining and erosion control yield timbering |
| 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 |
| CN112627864B (en) * | 2020-12-16 | 2022-10-11 | 中煤科工开采研究院有限公司 | Support device for underground coal mine |
| CN112832830B (en) * | 2020-12-31 | 2022-12-06 | 山东省煤田地质规划勘察研究院 | Mining anti-impact double-column combined pier column structure, supporting system and construction method |
| CN112983538B (en) * | 2021-04-02 | 2021-10-26 | 徐州中国矿大岩土工程新技术发展有限公司 | Coal mine goaf filling and grouting equipment |
| CN113217047B (en) * | 2021-05-11 | 2022-10-11 | 淮南矿业(集团)有限责任公司 | Yielding high-strength concrete skeleton roadside support |
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| GB191501814A (en) * | 1915-02-04 | 1915-11-04 | Vladimir Antony Verner | Improvements in and connected with Pit Props. |
| CN201396176Y (en) * | 2009-02-26 | 2010-02-03 | 王洁 | Compound multi-purpose column shoe column cap |
| CN101929345A (en) * | 2010-08-06 | 2010-12-29 | 中国矿业大学 | Large-section underground cave reducing-span pier structure and use method thereof |
| CN101982629A (en) * | 2010-10-18 | 2011-03-02 | 清华大学 | Assembly-type self-compaction steel tube and concrete composite structure |
| CN102182475A (en) * | 2011-04-29 | 2011-09-14 | 安徽省皖北煤电集团有限责任公司百善煤矿 | I-shaped steel support system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3044528B2 (en) * | 1996-03-15 | 2000-05-22 | 邦夫 渡辺 | Construction method of houses, offices and other buildings and their buildings |
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2013
- 2013-08-26 CN CN201310376587.1A patent/CN103485801B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191501814A (en) * | 1915-02-04 | 1915-11-04 | Vladimir Antony Verner | Improvements in and connected with Pit Props. |
| CN201396176Y (en) * | 2009-02-26 | 2010-02-03 | 王洁 | Compound multi-purpose column shoe column cap |
| CN101929345A (en) * | 2010-08-06 | 2010-12-29 | 中国矿业大学 | Large-section underground cave reducing-span pier structure and use method thereof |
| CN101982629A (en) * | 2010-10-18 | 2011-03-02 | 清华大学 | Assembly-type self-compaction steel tube and concrete composite structure |
| CN102182475A (en) * | 2011-04-29 | 2011-09-14 | 安徽省皖北煤电集团有限责任公司百善煤矿 | I-shaped steel support system |
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| CN103485801A (en) | 2014-01-01 |
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Granted publication date: 20160120 Termination date: 20160826 |