CN109458202B - Yielding anchor cable - Google Patents
Yielding anchor cable Download PDFInfo
- Publication number
- CN109458202B CN109458202B CN201811621451.1A CN201811621451A CN109458202B CN 109458202 B CN109458202 B CN 109458202B CN 201811621451 A CN201811621451 A CN 201811621451A CN 109458202 B CN109458202 B CN 109458202B
- Authority
- CN
- China
- Prior art keywords
- anchor cable
- yielding
- cone
- anchor
- fixed
- 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.)
- Active
Links
- 239000011435 rock Substances 0.000 claims abstract description 35
- 238000004873 anchoring Methods 0.000 claims abstract description 11
- 230000000149 penetrating effect Effects 0.000 claims abstract 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 3
- 239000003245 coal Substances 0.000 description 8
- 230000008093 supporting effect Effects 0.000 description 3
- 238000005065 mining Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0093—Accessories
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a yielding anchor cable which comprises an anchor cable, wherein one end of the anchor cable is an anchoring end penetrating into surrounding rock, a yielding cone is arranged on the surface of the surrounding rock, the other end of the anchor cable is a fixed end penetrating out of the yielding cone and then fixed, the yielding cone is in a hollow cone shape, an anchor cable clamping piece is arranged inside the yielding cone, the anchor cable penetrates through the yielding cone and then is fixed through the anchor cable clamping piece, and the anchor cable section between the fixed end and the yielding cone is a coiled anchor cable in a coiled state. The anchor cable support design is based on the existing anchor cable support method, the yielding effect is achieved by adding the yielding part, the yielding part is a hollow large-scale yielding tray, the coiling of the anchor cable is formed inside the tray, the elongation of the anchor cable under the condition of rock burst is increased, and the fracture of the anchor cable is reduced; and set up at the anchor rope position that the country rock faces the free surface and let and press the awl, let and press the awl and absorb impact energy through broken rock, finally reach the effect that reduces rock burst and destroy, improve tunnel stability.
Description
Technical Field
The invention relates to a supporting structure, in particular to a yielding anchor cable structure, and belongs to the field of mine roadway supporting.
Background
The rock burst is generally characterized in that under the action of high ground stress under certain conditions, coal rock bodies around a coal mine roadway or a stope face release elastic energy in a sudden, sharp and violent mode, so that the coal rock layers are instantaneously damaged and impact phenomena accompanied by air waves and coal dust are generated. With the continuous increase of mining depth and the increasing expansion of mining range, the damage of rock burst is becoming more serious, and the damage of rock burst is becoming more urgent to reduce and improve the supporting effect of a roadway.
The anchor rod, anchor cable and metal net combined support is a support form commonly adopted by coal mine tunnels, and improves the mechanical property of surrounding rocks through the anchoring action of the anchor rod, so that weak surrounding rocks around the tunnels form a relatively complete anchoring body; the anchor cable is mostly used for suspending the roadway roof so as to reduce roof separation. Meanwhile, for an impact roadway, the anchor rod and anchor cable combined support can absorb the impact energy in the coal rock, and the damage of rock burst to the roadway is weakened.
In the actual production process, the impact roadway support is often broken by the breaking of the anchor cable, on the one hand, the elongation of the anchor cable is small and is generally 3.5% -4%, the length of the anchor cable is mostly 6.3-8.3 m, and when the coal rock impact energy exceeds the absorption capacity of the anchor cable, the anchor cable is broken. Increasing the energy absorbing capacity of the cable is therefore one aspect of the impact roadway cable design that needs to be considered.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the yielding anchor cable which is applied to the combined support of the anchor rods and the anchor cables of the coal mine return air and the haulage roadway with the danger of rock burst, is used for absorbing the impact energy in the coal rock, keeping the stability of the roadway and reducing the danger of the rock burst.
The invention adopts the following technical scheme:
the utility model provides a let press anchor rope, includes the anchor rope, the one end of anchor rope is for going deep into the inside anchor end of country rock, and country rock surface department is provided with lets press the awl, the other end of anchor rope is for wearing out the stiff end of after-fixing from letting press the awl, let press the awl for hollow toper, let press the inside of awl to be provided with the anchor rope clamping piece, the anchor rope passes to let press to be fixed through the anchor rope clamping piece behind the awl, the stiff end is to letting the anchor rope that coils of pressing the anchor rope section between the awl for coiling the state.
Furthermore, a hollow yielding tray is fixedly arranged on the surface of the surrounding rock, and the fixed end of the anchor cable is fixed to the top end of the hollow yielding tray.
Further, the hollow crush trays are fixed by expansion bolts.
Still further, the anchoring end is provided with an anchoring section.
Further, the conical surface angle of the pressure-yielding cone is 60 degrees.
Further, the cone height of the pressure-yielding cone is 50 mm.
Further, the number of turns of the coiled cable rope is 0.5 to 1 turn.
Further, the anchor cable is composed of 7 high-strength steel strands.
The invention has the following beneficial effects:
the anchor cable support design is based on the existing anchor cable support method, the yielding effect is achieved by adding the yielding part, the yielding part is a hollow large-scale yielding tray, the coiling of the anchor cable is formed inside the tray, the elongation of the anchor cable under the condition of rock burst is increased, and the fracture of the anchor cable is reduced; and set up at the anchor rope position that the rock faced the vacant face and let and press the awl, let and press the awl and absorb impact energy through broken rock, finally reach the effect that reduces rock burst and destroy, improve tunnel stability.
Drawings
Fig. 1 is a schematic view of a yielding anchor cable.
Fig. 2 is a cross-sectional view of a cable bolt.
Fig. 3 is a perspective view of a crush cone.
The labels in the figure are: 1. a hollow yielding tray; 2. a pressure yielding cone; 3. coiling the anchor cable; 4. an anchoring section; 5. an anchor cable; 6. drilling; 7. an anchoring member; 8. the section of the bolt; 9. an expansion bolt; 10. an anchor cable clamping piece.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The anchor cable support design is based on the existing anchor cable support method, the yielding effect is achieved by adding the yielding part, the yielding part is a hollow large-scale yielding tray, the coiling of the anchor cable is formed inside the tray, the elongation of the anchor cable under the condition of rock burst is increased, and the fracture of the anchor cable is reduced; and set up at the anchor rope position that the country rock faces the free surface and let and press the awl, let and press the awl and absorb impact energy through broken rock, finally reach the effect that reduces rock burst and destroy, improve tunnel stability.
Example 1:
this implementation lets press anchor rope structure as shown in fig. 1, including anchor rope 5, the one end of anchor rope 5 is for going deep into the anchor end on ground, and ground department is provided with lets and presses awl 2, and the other end of anchor rope 5 is for wearing out the fixed stiff end after the back from letting press awl 2, let and press awl 2 for hollow toper, let and press the inside of awl 2 and be provided with anchor rope clamping piece 10, anchor rope clamping piece 10 by three ring formations, anchor rope 5 passes and lets press to be fixed through anchor rope clamping piece 10 behind the awl 2, and the anchor rope 3 is coiled for coiling the state to the anchor rope section that lets between the awl 2 to the stiff end.
The ground is also fixedly provided with a round hollow yielding tray 1 through an expansion bolt 9, and the fixed end of the anchor cable is fixed at the top end of the hollow yielding tray through an anchoring part 7. When rock burst occurs, the hollow yielding tray 1 can play a role in increasing deformation of the anchor cable.
The yielding cone 2 is conical, and the yielding cone is hollow, and is specifically shown in fig. 3. The conical surface angle is 60 degrees, the cone height is 50mm, and an anchor cable clamping piece is arranged in the cone. Let and press the awl and play two aspect effects: on one hand, the anchor cable can be tensioned, and certain pretightening force is applied; on the other hand, when rock burst occurs, the anchor cable is gradually advanced and broken as it is deformed, and the rock is broken to absorb the impact energy.
Coiling anchor rope 3 coils inside circular letting presses the tray, can coil 0.5 to 1 circle as the circumstances, plays the effect that increases the anchor rope elongation.
The cable 5 is made up of 7 high strength steel strands with a cable cross-section 8 as shown in figure 2.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A yielding anchor cable is characterized in that: the anchor cable comprises an anchor cable (5), one end of the anchor cable (5) is an anchoring end penetrating into the ground, a yielding cone (2) is arranged on the ground, the other end of the anchor cable (5) is a fixed end penetrating out of the yielding cone (2) and then fixed, the yielding cone (2) is a hollow cone, an anchor cable clamping piece (10) is arranged inside the yielding cone (2), the anchor cable (5) penetrates through the yielding cone (2) and then is fixed through the anchor cable clamping piece (10), and an anchor cable section between the fixed end and the yielding cone (2) is a coiled anchor cable (3); the yielding cone (2) absorbs impact energy by crushing rocks, so that the damage of rock burst is reduced; the conical surface angle of the yielding cone (2) is 60 degrees, the cone height is 50mm, and the number of winding turns of the winding anchor cable (3) is 0.5 to 1 turn.
2. A crush anchor according to claim 1, wherein: the ground is also fixedly provided with a hollow yielding tray (1), and the fixed end of the anchor cable (5) is fixed at the top end of the hollow yielding tray (1).
3. A crush anchor according to claim 2, wherein: the hollow yielding tray (1) is fixed through expansion bolts (9).
4. A crush anchor according to claim 1, wherein: the anchoring end is provided with an anchoring section (4).
5. A crush anchor according to claim 1, wherein: the anchor cable (5) is composed of 7 high-strength steel strands.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811621451.1A CN109458202B (en) | 2018-12-28 | 2018-12-28 | Yielding anchor cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811621451.1A CN109458202B (en) | 2018-12-28 | 2018-12-28 | Yielding anchor cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109458202A CN109458202A (en) | 2019-03-12 |
| CN109458202B true CN109458202B (en) | 2020-10-27 |
Family
ID=65615321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811621451.1A Active CN109458202B (en) | 2018-12-28 | 2018-12-28 | Yielding anchor cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109458202B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016034A (en) * | 2012-11-03 | 2013-04-03 | 孟钧 | Mining hollow grouting anchor cable |
| CN203239372U (en) * | 2013-05-20 | 2013-10-16 | 安徽理工大学 | Anchor rod subsection control retaining and protecting device for large-deformation roadway |
| CN103590845B (en) * | 2013-11-28 | 2015-09-16 | 河南理工大学 | A kind of Impact-resistant interval grouting cable anchor and using method thereof |
| CN205689230U (en) * | 2016-06-06 | 2016-11-16 | 贵州理工学院 | A kind of recyclable pressure grouting anchor cable that allows |
| CN205689228U (en) * | 2016-06-06 | 2016-11-16 | 贵州理工学院 | A kind of pressure-release anchor cable |
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2018
- 2018-12-28 CN CN201811621451.1A patent/CN109458202B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109458202A (en) | 2019-03-12 |
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