CN114607429A - Grouting anchor cable with pressure control and yielding functions - Google Patents
Grouting anchor cable with pressure control and yielding functions Download PDFInfo
- Publication number
- CN114607429A CN114607429A CN202210303353.3A CN202210303353A CN114607429A CN 114607429 A CN114607429 A CN 114607429A CN 202210303353 A CN202210303353 A CN 202210303353A CN 114607429 A CN114607429 A CN 114607429A
- Authority
- CN
- China
- Prior art keywords
- grouting
- anchor cable
- pressure control
- pressure
- surrounding rock
- 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
- 239000011435 rock Substances 0.000 claims abstract description 30
- 239000011440 grout Substances 0.000 claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 239000004568 cement Substances 0.000 claims abstract description 4
- 230000007935 neutral effect Effects 0.000 claims abstract description 4
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 230000002787 reinforcement Effects 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 8
- 238000007569 slipcasting Methods 0.000 claims description 7
- 238000005065 mining Methods 0.000 abstract description 6
- 230000008093 supporting effect Effects 0.000 abstract description 6
- 238000001125 extrusion Methods 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000000518 rheometry Methods 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- 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
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/021—Grouting with inorganic components, e.g. cement
-
- 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
- E21D21/008—Anchoring or tensioning means
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)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Piles And Underground Anchors (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention relates to the technical field of grouting anchor cables in underground engineering, in particular to a grouting anchor cable with pressure control and yielding functions, which comprises a grouting anchor cable main body, wherein a grouting pipe is arranged in the grouting anchor cable main body, and a plurality of grout outlets are formed in the grouting pipe; a plurality of steel strands are wound outside the grouting pipe; the tray is sleeved on the grouting anchor cable main body and abuts against the outer surface of the roadway surrounding rock; the grout stopping plug is used for plugging the orifice of the drilled hole; the lock is matched with the lock core and used for locking the tray and the grouting anchor cable main body; the nut, the grout stopping plug and the tray form a cable body fastening device; the pressure control piston is connected with the spring; a cement medicated roll baffle; the high-strength yielding spring is fixed on the neutral rod. By utilizing the scheme, the grouting for the surrounding rock distribution and classification can be realized by flexibly controlling the grouting pressure, and when the surrounding rock is subjected to larger mining stress, the yielding spring in the main rod body can generate corresponding extrusion deformation in time, the anchor cable can still provide supporting force for the surrounding rock, and the purpose of resisting the surrounding rock is realized.
Description
Technical Field
The invention relates to the technical field of grouting anchor cables in underground engineering, in particular to a grouting anchor cable with pressure control and yielding functions.
Background
The problem of soft rock roadway support in the mining field is always a big problem in the field, particularly the roadway support of weak and broken surrounding rocks is very difficult, and the conventional support mode cannot effectively control the surrounding rocks of the roadway.
The existing hollow grouting anchor cable has the advantages of high strength, large prestress, simplicity in processing, convenience in installation and the like, and is widely applied to supporting and reinforcing of coal mine roadways. However, when surrounding rock is broken and strong rheology appears in the deep part, the tunnel surrounding rock deforms greatly, so that the coal mine production requirements are difficult to meet, and the need for improving the existing anchor cable is urgently needed.
CN110513132A discloses a pressure-sensitive grouting anchor cable and a step-by-step grouting construction method, wherein a pressure-sensitive valve is arranged between grouting anchor cable bodies of the pressure-sensitive grouting anchor cable; CN112392524A discloses a geotechnical engineering sectional type cavity slip casting anchor rope device, is provided with level pressure seal cover and segmentation isolator on slip casting inner tube or the hollow slip casting pipe.
However, the two grouting anchor cables have the following problems: (1) the grouting pressure is used for segmented grouting, but the segmentation is relatively fixed, the pressure cannot be flexibly regulated and controlled, and the pressure is not easy to control and regulate. (2) The grouting anchor cable does not have a yielding function, and is difficult to adapt to roadway support under the conditions of strong mining pressure, large deformation of surrounding rocks and strong rheology.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a grouting anchor cable with pressure control and yielding functions, which has good supporting effect and is flexible and convenient to grout.
In order to achieve the above object, the present invention provides a grouting anchor cable with pressure control and yielding functions, which comprises:
the grouting anchor cable main body 1 is internally provided with a grouting pipe 8, and the grouting pipe 8 is provided with a plurality of grout outlets; a plurality of steel strands 7 are wound on the outer side of the grouting pipe 8; the tray 5 is sleeved on the grouting anchor cable main body 1, and the tray 5 abuts against the outer surface of the roadway surrounding rock; the grout stopping plug 6 is used for plugging the orifice of the drilled hole; the lockset 4 is matched with the lock cylinder 3 and used for locking the tray 5 and the grouting anchor cable main body 1; the nut 2, the grout stop plug 6 and the tray 5 form a cable body fastening device; the pressure control piston 9 is connected with a spring 10; a cement explosive roll baffle 11; the high-strength yielding spring 13 is fixed on the neutral rod 12.
Particularly, the grouting pipe is connected with an external grouting pump through a pipeline, when slurry enters the grouting pipe through the grouting pump, a certain pressure is applied to the pressure control piston, the compression spring deforms to push the pressure control piston to move towards the tail part of the anchor cable, and at the moment, the slurry in the grouting pipe flows out through an orifice on the wall of the grouting pipe, so that grouting reinforcement on shallow surrounding rock is completed; when the grouting pressure is increased, the grout pushes the pressure control piston to move, the pressure control piston compression spring further deforms, the grout continuously moves forwards, and grouting reinforcement is carried out on the deep surrounding rock.
In particular, the interval distance between a plurality of grout outlets arranged on the grouting pipe is 0.5 m.
In particular, a plurality of steel strands uniformly and tightly surround the grouting pipe in a spiral shape.
Particularly, both ends of the grouting anchor cable main body are respectively provided with threads and threaded connecting nuts, and a plurality of grouting anchor cables can be connected together through the threads and the threaded connecting nuts.
Compared with the prior art, the invention has the following advantages: when slurry enters the grouting pipe by providing pressure through a grouting pump, a certain pressure action is applied to the pressure control piston by utilizing the compression deformation principle of the spring, the pressure compresses the spring to deform, the pressure control piston is pushed to move towards the tail part of the anchor cable, and the slurry in the grouting pipe flows out through an orifice on the wall of the grouting pipe at the moment, so that grouting reinforcement on shallow surrounding rock is completed; when the grouting pressure is increased, the grout pushes the piston to move, the pressure control piston compression spring further deforms, the grout continuously moves forwards, and grouting reinforcement is carried out on deep surrounding rocks, so that graded grouting of the surrounding rocks can be realized by flexibly controlling the grouting pressure. When the surrounding rock is subjected to larger mining stress, the yielding spring in the main rod body can generate corresponding extrusion deformation in time, and the anchor cable can still provide supporting force for the surrounding rock, so that resistance is realized in yielding.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of section A-A of FIG. 1 according to the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention will be more clearly and clearly defined.
Referring to fig. 1 and 2, a grouting anchor cable with pressure control and yielding functions includes:
the grouting anchor cable main body 1 is internally provided with a grouting pipe 8;
the outer side of the grouting pipe 8 is provided with a steel strand 7;
a nut 2;
the grout stopping plug 6 is used for plugging the orifice of the drilled hole;
the tray 5 is sleeved on the grouting anchor cable main body 1, and the tray 5 abuts against the outer surface of the roadway surrounding rock;
the lock 4 is matched with the lock cylinder 3, and the lock 4 and the lock cylinder 3 are used for locking the tray 5 and the grouting anchor cable main body 1;
the pressure control piston 9 is connected with a spring 10;
a cement explosive roll baffle 11;
and the high-strength yielding spring 13 is fixed on the neutral rod 12.
A slip casting anchor cable with controllable pressure yielding function is characterized in that a slip casting pipe is arranged inside an anchor cable main body, a plurality of grout outlets are formed in the slip casting pipe, and the spacing distance between the grout outlets is 0.5 m; a plurality of steel strands are wound on the periphery of the grouting pipe, and the steel strands uniformly and tightly surround the grouting pipe in a spiral shape; a pressure control piston is arranged in the grouting pipe and is connected with a spring; the grouting pipe is connected with a grouting pump through a pipeline, when slurry enters the grouting pipe by pressure provided by the grouting pump, a certain pressure action is exerted on the pressure control piston by utilizing the principle of spring compression deformation, the pressure compresses the spring to deform, the pressure control piston is pushed to move towards the tail part of the anchor rope, and at the moment, the slurry in the grouting pipe flows out through an orifice on the wall of the grouting pipe, so that grouting reinforcement on shallow surrounding rock is completed; when grouting pressure is increased, grout pushes the pressure control piston to move, the pressure control piston compression spring further deforms, the grout continuously moves forwards, and grouting reinforcement is carried out on deep surrounding rocks, so that graded grouting of the surrounding rocks can be realized through flexible grouting pressure control. When the surrounding rock is subjected to larger mining stress, the yielding spring in the main rod body can generate corresponding extrusion deformation in time, and the anchor cable can still provide supporting force for the surrounding rock and cannot be broken or failed.
The two ends of the anchor cable main body are respectively provided with a thread and a threaded connection nut, and a plurality of grouting anchor cables can be connected together through the thread and the threaded connection nut.
The grouting anchor cable with the pressure-controlled yielding function disclosed by the invention is flexible in grouting mode, low-pressure or high-pressure grouting can be realized, different grout is injected into different areas in a targeted manner, the grouting effect is ensured, the grout waste is reduced, the supporting effect of broken surrounding rocks such as soft rock roadways is improved, and meanwhile, the anchor cable can play a pressure-yielding role when the mining pressure is higher.
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 invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. The utility model provides a have accuse pressure concurrently and let slip casting anchor rope of pressure function which characterized in that, it includes:
the grouting anchor cable main body is internally provided with a grouting pipe, and the grouting pipe is provided with a plurality of grout outlets; a plurality of steel strands are wound outside the grouting pipe; the tray is sleeved on the grouting anchor cable main body and abuts against the outer surface of the roadway surrounding rock; the grout stopping plug is used for plugging the orifice of the drilled hole; the lock is matched with the lock core and used for locking the tray and the grouting anchor cable main body; the nut, the grout stopping plug and the tray form a cable body fastening device; the pressure control piston is connected with the spring; a cement medicated roll baffle; the high-strength yielding spring is fixed on the neutral rod.
2. The grouting anchor cable with the pressure control and yielding functions as claimed in claim 1, wherein the grouting pipe is connected with an external grouting pump through a pipeline, when slurry enters the grouting pipe through the grouting pump, a certain pressure is applied to the pressure control piston, the compression spring deforms, the pressure control piston is pushed to move towards the tail part of the anchor cable, and at the moment, the slurry in the grouting pipe flows out through an orifice on the wall of the grouting pipe, so that grouting reinforcement on shallow surrounding rock is completed; when the grouting pressure is increased, the grout pushes the pressure control piston to move, the pressure control piston compression spring further deforms, the grout continuously moves forwards, and grouting reinforcement is carried out on the deep surrounding rock.
3. The grouting anchor cable with both pressure control and yielding functions as claimed in claim 1 or 2, wherein the grouting pipe is provided with a plurality of grout outlets spaced at a distance of 0.5 m.
4. The grouting anchor cable with both pressure control and yielding functions as claimed in claim 1 or 2, wherein the steel strands are uniformly and tightly wound around the grouting pipe in a spiral shape.
5. The grouting anchor cable with both pressure control and yielding functions as claimed in claim 1 or 2, wherein the grouting anchor cable body is provided with threads and threaded connection nuts at two ends respectively, and a plurality of grouting anchor cables can be connected together through the threads and the threaded connection nuts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210303353.3A CN114607429A (en) | 2022-03-24 | 2022-03-24 | Grouting anchor cable with pressure control and yielding functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210303353.3A CN114607429A (en) | 2022-03-24 | 2022-03-24 | Grouting anchor cable with pressure control and yielding functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114607429A true CN114607429A (en) | 2022-06-10 |
Family
ID=81866144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210303353.3A Pending CN114607429A (en) | 2022-03-24 | 2022-03-24 | Grouting anchor cable with pressure control and yielding functions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114607429A (en) |
-
2022
- 2022-03-24 CN CN202210303353.3A patent/CN114607429A/en active Pending
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