CN108825278B - Grouting anchor rod for anchoring prestress component of underground mine roadway and using method thereof - Google Patents
Grouting anchor rod for anchoring prestress component of underground mine roadway and using method thereof Download PDFInfo
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- CN108825278B CN108825278B CN201810914422.8A CN201810914422A CN108825278B CN 108825278 B CN108825278 B CN 108825278B CN 201810914422 A CN201810914422 A CN 201810914422A CN 108825278 B CN108825278 B CN 108825278B
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- 238000004873 anchoring Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000008093 supporting effect Effects 0.000 claims abstract description 54
- 230000007246 mechanism Effects 0.000 claims abstract description 33
- 239000011347 resin Substances 0.000 claims abstract description 21
- 229920005989 resin Polymers 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 16
- 239000011435 rock Substances 0.000 claims abstract description 13
- 239000011440 grout Substances 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 6
- 238000010276 construction Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 5
- 230000005641 tunneling Effects 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000007569 slipcasting Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- KRQUFUKTQHISJB-YYADALCUSA-N 2-[(E)-N-[2-(4-chlorophenoxy)propoxy]-C-propylcarbonimidoyl]-3-hydroxy-5-(thian-3-yl)cyclohex-2-en-1-one Chemical compound CCC\C(=N/OCC(C)OC1=CC=C(Cl)C=C1)C1=C(O)CC(CC1=O)C1CCCSC1 KRQUFUKTQHISJB-YYADALCUSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- E21D20/025—Grouting with organic components, e.g. resin
-
- 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
- E21D21/008—Anchoring or tensioning means
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- 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)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to a grouting anchor rod for anchoring prestress components at two ends of an underground mine roadway, which comprises a screw, wherein a resin anchoring agent anchor head is arranged at the upper end of the screw, an upper supporting device which is positioned at the lower side of the resin anchoring agent anchor head and is unfolded after being pulled down and used for clamping the side wall of a supporting hole and provided with a self-locking mechanism is arranged on the screw, a prestress adjusting device is arranged on a rod body of the screw, a lower jacking supporting device which is positioned at the lower part of the screw and is clamped on the side wall of the supporting hole after being unfolded is arranged on the lower part of the screw, a tray used for supporting the rock wall outside the supporting hole is sleeved on the lower side of the lower jacking supporting device, a grouting plug and a locking mechanism are sleeved on the lower side of the tray, and a grouting mechanism with a grouting outlet positioned at the upper part of the screw and penetrated by the tray is also arranged on the screw. The anchor rod is compact in structure and convenient to use for solving construction safety problems such as ledge and roof fall of surrounding rock in the tunneling process in a chamber and a tunnel rock stratum compared with broken positions.
Description
Technical Field
The invention relates to a grouting anchor rod for anchoring prestressed components at two ends of an underground mine roadway and a use method thereof, which are applicable to the construction field of supporting engineering such as a tunnel opening, a tunnel and the like.
Background
Collapse and caving are extremely easy to occur in the construction process of the cave opening broken belt; the construction safety environment is poor; the requirements on the supporting quality of the tunnel opening are high, and the bearing capacity is high. The current common construction method is a grouting filling method for treating the broken belt, and has high cost, poor effect and low construction speed. The anchor bolt support is used as an effective accurate roadway support mode, the stability of surrounding rock can be obviously improved due to the strengthening effect on the strength of the surrounding rock of the roadway, and the anchor bolt support has the advantages of low support cost, high roadway forming speed, low labor intensity, high roadway section utilization rate, simplified stope end maintenance process, obvious improvement of operation environment and safe production conditions and the like, can improve the economic benefit of a mine, is more and more widely used, thus being a main support form of the mine roadway of a coal mine enterprise, and representing the main development direction of the coal mine roadway support technology. However, the anchor bolt support is adopted, and has the defects that the anchor bolt support belongs to recessive support, the monitoring and the detection of the support quality and the reliability are not easy, roof fall accidents without obvious aura sometimes occur, in addition, the support effect is not easy to ensure for the stoping roadway of the roadway with large deformation of soft rock and large plasticity, and the roadway cannot be used.
Disclosure of Invention
The invention aims to provide a grouting anchor rod for anchoring prestressed components at two ends of an underground mine roadway and a use method thereof, which have compact structures, are convenient for solving construction safety problems such as ledge and roof fall of surrounding rock in the tunneling process of a chamber and a tunnel stratum compared with broken parts, and have simple and convenient use method.
The technical scheme of the invention is as follows: the utility model provides a be used for both ends anchor prestressing force component slip casting stock in underground mine tunnel, includes the screw rod, the upper end of screw rod is provided with resin anchor head, is provided with the upper portion strutting arrangement that the screw rod is stretched after the downside that is located resin anchor head and is used for blocking the supporting hole lateral wall and have self-locking mechanism on the screw rod, be provided with prestressing force adjusting device on the shaft of screw rod, the lower part of screw rod is provided with the lower part of blocking the supporting hole lateral wall after stretching and lifts the supporting device soon, is located the tray that the downside that the lower part was lifted soon on the screw rod was used for propping the supporting hole outer rock wall, is located the downside cover of tray on the screw rod and has put the grout stop and be provided with locking mechanism, still is provided with the grout outlet on the screw rod upper portion and by tray slip casting mechanism that wears out.
Further, the resin anchoring agent anchor head comprises an anchor head sleeve arranged on the upper side of the screw rod, and the outer side of the anchor head sleeve is wrapped with the resin anchoring agent encapsulated in the bag body.
Further, the upper supporting device comprises a hinging seat fixedly connected with the lower end of the anchor head of the resin anchoring agent, a plurality of connecting rods are hinged to the periphery of the hinging seat at intervals, a fixing seat is fixed to the upper portion of the screw rod and located on the lower side of the hinging seat, an upper supporting rod is correspondingly hinged to the lower side of the connecting rod on the fixing seat, and the other end of the connecting rod is hinged to the middle of the upper supporting rod.
Further, the self-locking mechanism comprises a vertical blind hole which is arranged in the anchor head sleeve from bottom to top, a connecting rod which penetrates through the hinging seat and is used for being connected with the upper end of the screw rod is arranged in the vertical blind hole, the upper end of the connecting rod is connected with the top of the vertical blind hole through a spring, and a locking mechanism which is matched with the anchor head sleeve after descending is arranged on the connecting rod.
Further, the locking mechanism comprises longitudinal blind holes arranged on the front side wall and the rear side wall of the vertical blind hole, transverse through holes are formed in the two side walls of the vertical blind hole and located on the lower side of the longitudinal blind hole, upper spring ejector pins are respectively arranged on the front side and the rear side of the upper portion of the connecting rod, and lower spring ejector pins are arranged on the two side portions of the connecting rod and located on the lower side of the upper spring ejector pins.
Further, the prestress adjusting device comprises an upper fixing plate which is in threaded connection with the upper portion of the screw, a plurality of prestress steel strands are fixed on the periphery of the upper fixing plate at intervals, a lower fixing plate is in threaded connection with the lower portion of the screw, a plurality of bolts which are arranged from bottom to top are in threaded connection with the periphery of the lower fixing plate at intervals, and the bolts are welded with the lower ends of the corresponding prestress steel strands.
Further, the grouting mechanism comprises a primary grouting pipe and a secondary grouting pipe which are arranged on two side parts of the screw rod, vertical through holes are respectively formed in two side parts of the upper fixing plate and the lower fixing plate, the upper ends of the primary grouting pipe and the secondary grouting pipe penetrate through the corresponding vertical through holes in the upper fixing plate and are fixed on the screw rod through buckles, and the lower ends of the primary grouting pipe and the secondary grouting pipe penetrate through the corresponding vertical through holes in the lower fixing plate and are penetrated out of the tray.
Further, the lower portion screwing support device comprises an upper fixing plate connected with the lower portion of the screw rod, lower support rods are hinged to the peripheral portion of the upper fixing plate at intervals, the lower fixing plate is sleeved on the lower side of the upper fixing plate on the screw rod, screwing nuts for driving the lower fixing plate to lift are screwed on the screw rod, and support rods with the upper ends hinged to the middle portions of the lower support rods are hinged to the peripheral portion of the lower fixing plate correspondingly.
Further, the upper fixing plate comprises an upper fixing nut in threaded connection with a screw, a connecting plate used for being hinged with the lower supporting rods is sleeved on the lower side of the upper fixing nut on the screw, four lower supporting rods are hinged on the connecting plate at intervals, and the lower fixing nut is in threaded connection with the lower side of the connecting plate on the screw; the other end of the lower supporting rod is provided with a sucking disc type disc.
The application method of the grouting anchor rod for anchoring the prestressed components at two ends of the underground mine roadway comprises the following steps:
1) The anchor rod cock is put into a supporting hole of a roadway or a cave stratum, so that the resin anchoring agent is used for fixing the anchor rod;
2) Pulling down the screw rod to expand the upper support device and clamp the wall of the support hole;
3) The lower part of the screwing support device is unfolded by rotating the screwing nut upwards, and the hole wall of the support hole is clamped again;
4) Firmly supporting the tray against the Kong Waiyan wall of the supporting hole, installing the grout stop plug, and locking the grout stop plug and the tray through a locking mechanism;
5) Grouting into the support hole by a grouting mechanism until the slurry in the pipe cannot enter the hole.
Compared with the prior art, the invention has the following advantages: the grouting anchor rod with the two-end anchoring prestress component is simple and compact in structure, easy to operate and high in practical feasibility, so that the operation safety problems of the chamber, the roadway rock stratum, such as loose, broken and collapse-prone fragments are basically controlled, the construction safety problems of the surrounding rock, such as side fragments and roof fall in the tunneling process of the chamber and the roadway rock stratum, are effectively solved, the stability and the safety of construction are guaranteed, the construction efficiency is improved, and the supporting effect is remarkable.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the structure of the anchor head sleeve of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2 in accordance with the present invention;
FIG. 4 is a schematic view of the construction of the upper support device of the present invention;
FIG. 5 is a schematic diagram of the prestress adjusting device of the invention;
FIG. 6 is a B-B cross-sectional view of FIG. 5 in accordance with the present invention;
fig. 7 is a schematic structural view of the lower swing-up supporting device of the present invention.
Detailed Description
In order to make the above features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below, but the present invention is not limited thereto.
Referring to fig. 1 to 7
The utility model provides a be used for both ends anchor prestressing force component slip casting stock in underground mine tunnel, includes screw rod 10 the upper end of screw rod is provided with resin anchor head 20, and the downside that is located resin anchor head on the screw rod is provided with the screw rod and expandes after pulling down and be used for blocking the upper portion strutting arrangement 30 that strut hole lateral wall just has self-locking mechanism, be provided with prestressing force adjusting device on the shaft of screw rod, the lower part of screw rod is provided with the lower part of blocking strut hole lateral wall after expanding and revolves and rise strutting arrangement 50, and the downside that is located lower part on the screw rod revolves to rise strutting arrangement is overlapped and is used for propping up the tray 60 of strut hole outer rock wall, plays the effect of holding cement paste through the tray. The screw is sleeved with a grout stop plug 71 and a locking mechanism, which are positioned on the lower side of the tray, so that the holes on the tray are blocked by the grout stop plug, and the tray and the grout stop plug are locked by the locking mechanism. The screw is also provided with a grouting mechanism with a grouting outlet positioned at the upper part of the screw and penetrated out by the tray so as to finish grouting through the grouting mechanism.
In the embodiment, the screw rod material is the steel bar with external threads, so that the friction resistance of the screw rod with external threads after grouting is far increased compared with that of a common anchor rod (the rod body is a smooth steel bar), the grouting is more reinforced and solid, and the problem that the grouting is loose and not compact after grouting of the traditional anchor rod is solved.
In this embodiment, the resin anchoring agent anchor head includes an anchor head sleeve 21 disposed at the upper side of the screw, and the outer side of the anchor head sleeve is wrapped with a resin anchoring agent 22 encapsulated in the bag body, so as to be connected with the upper part of the supporting hole through the resin anchoring agent, thereby completing the preliminary fixation of the anchor rod.
In this embodiment, the upper supporting device includes the articulated seat 31 fixedly connected with the lower extreme of resin anchor, the week interval of articulated seat articulates there are four connecting rods 32, screw rod upper portion just is located the downside of articulated seat and is fixed with fixing base 33, the downside that is located the connecting rod on the fixing base corresponds articulates there is last supporting rod 34, go up the number of supporting rod and be four, the other end of connecting rod articulates with the middle part of last supporting rod. The upper supporting device forms a reverse umbrella type supporting frame by pulling down the screw rod, and the lower the rod is under the action of self gravity, the more the rod is pulled down, the more the rod is fastened.
In this embodiment, the self-locking mechanism includes a vertical blind hole 211 disposed in the anchor sleeve from bottom to top, and a connecting rod 23 penetrating through the hinge seat and connected to the upper end of the screw rod is disposed in the vertical blind hole, and the connecting rod and the upper end of the screw rod are welded, screwed or are part of the upper end of the screw rod. The upper end of the connecting rod is connected with the top of the vertical blind hole through a spring 24, the connecting rod is welded with the spring, the upper end of the spring is welded with the top of the vertical blind hole, and a locking mechanism matched with the anchor head sleeve after descending is arranged on the connecting rod.
In this embodiment, the locking mechanism includes the vertical blind hole 212 that sets up in vertical blind hole front and back lateral wall, the both sides wall of vertical blind hole just is provided with horizontal through-hole 213 in the downside that is located vertical blind hole, the front and back side on connecting rod upper portion is provided with upper portion spring knock pin 231 respectively, and the both sides portion of connecting rod just is provided with lower part spring knock pin 232 in the downside that is located upper portion spring knock pin to when the screw rod pulling down, make upper portion spring knock pin card go into in the vertical blind hole, lower part spring knock pin card goes into horizontal through-hole in, and then accomplish the auto-lock after making upper portion strutting arrangement expand.
In this embodiment, the upper spring top pin and the lower spring top pin respectively include springs 233 disposed in the connecting rod, and two ends of the springs are respectively connected with a cylindrical chuck.
In this embodiment, the prestress adjusting device includes an upper fixing plate 41 screwed to an upper portion of the screw, a plurality of prestress strands 42 are fixed at intervals on a peripheral portion of the upper fixing plate, a lower fixing plate 43 is screwed to a lower portion of the screw, a plurality of bolts 44 disposed from bottom to top are screwed to a peripheral portion of the lower fixing plate at intervals, and the bolts are welded or hinged to lower ends of the corresponding prestress strands, so that tension of the prestress strands is adjusted by rotating the bolts.
In this embodiment, the number of the prestressed steel strands is 3 and the prestressed steel strands are distributed at intervals of 120 °, so that the prestressed steel strands, the screw and the slurry form a whole after grouting is completed, and the anchoring strength is further improved.
In this embodiment, the grouting mechanism includes a primary grouting pipe 11 and a secondary grouting pipe 12 disposed at two sides of the screw, vertical through holes are respectively disposed at two sides of the upper fixing plate and the lower fixing plate, the upper ends of the primary grouting pipe and the secondary grouting pipe respectively pass through the corresponding vertical through holes on the upper fixing plate and are fixed on the upper portion of the screw through the fastener 13, and the lower ends of the primary grouting pipe and the secondary grouting pipe respectively pass through the corresponding vertical through holes 45 on the lower fixing plate and pass out of the tray. Thereby realizing grouting from the upper part of the anchor rod through the primary grouting pipe and the secondary grouting pipe, and filling the slurry in the support hole.
In this embodiment, the lower portion screwing support device includes an upper fixing plate 51 connected to the lower portion of the screw, four lower support rods 52 are hinged to the peripheral portion of the upper fixing plate at intervals, a lower fixing plate 53 is sleeved on the lower side of the upper fixing plate on the screw, a screwing nut 54 driving the lower fixing plate to lift is screwed on the screw, four support rods 55 with upper ends hinged to the middle portion of the lower support rod are hinged to the peripheral portion of the lower fixing plate correspondingly, so that the lower support rod is unfolded and clamped on the side wall of the support hole after the screwing nut is rotated upwards.
In this embodiment, the upper fixing plate includes an upper fixing nut 511 screwed with a screw, a connecting plate 512 hinged to the lower supporting rod is sleeved on the lower side of the upper fixing nut on the screw, four lower supporting rods are hinged to the connecting plate at intervals, and the lower side of the connecting plate on the screw is screwed with the lower fixing nut 513, so that the positioning of the connecting plate is realized, and the position of the lower spiral lifting supporting device can be adjusted according to the specific depth of the supporting hole. The other end of the lower support rod is provided with a suction disc 56 for better suction at the side wall of the support hole.
In this embodiment, the locking mechanism includes a gasket 72 sleeved on the screw rod and located at the lower side of the grout stop, and a locking nut 73 is screwed on the lower side of the gasket on the screw rod, so that the grout stop and the tray are locked by the locking nut.
The application method of the grouting anchor rod for anchoring the prestressed component at two ends of the underground mine roadway comprises the following steps:
1) The anchor rod cock is put into a supporting hole of a roadway or a cave stratum, so that the resin anchoring agent is used for fixing the anchor rod;
2) Pulling down the screw rod to expand the upper support device and clamp the wall of the support hole;
3) The lower part of the screwing support device is unfolded by rotating the screwing nut upwards, and the hole wall of the support hole is clamped again;
4) Sleeving the tray on the screw rod to firmly prop against the Kong Waiyan wall of the supporting hole, installing the grouting stop, locking the grouting stop and the tray through the locking nut, and ensuring that the other end parts of the primary grouting pipe and the secondary grouting pipe are exposed in the installation process of the grouting stop;
5) Grouting into the support hole by a grouting mechanism until the slurry in the pipe cannot enter the hole.
The foregoing is only illustrative of the preferred embodiments of the present invention, and it will be apparent to those skilled in the art from this disclosure that, while designing a grouting bolt for anchoring prestressed members at both ends of an underground mine roadway in accordance with the teachings of the present invention, no inventive effort is required, and all equivalent changes, modifications, substitutions and alterations herein can be made without departing from the spirit and scope of the invention.
Claims (7)
1. The grouting anchor rod is characterized in that a resin anchoring agent anchor head is arranged at the upper end of the screw rod, an upper supporting device which is positioned at the lower side of the resin anchoring agent anchor head and is unfolded after being pulled down and used for clamping the side wall of a supporting hole and provided with a self-locking mechanism is arranged on the lower side of the screw rod, a prestress adjusting device is arranged on the rod body of the screw rod, a lower jacking supporting device which is clamped at the side wall of the supporting hole after being unfolded is arranged at the lower part of the screw rod, a tray used for supporting the rock wall outside the supporting hole is sleeved at the lower side of the lower jacking supporting device, a grouting plug is sleeved at the lower side of the tray and provided with a locking mechanism, and a grouting mechanism with a grouting outlet positioned at the upper part of the screw rod and penetrated by the tray is also arranged on the screw rod; the resin anchoring agent anchor head comprises an anchor head sleeve arranged on the upper side of the screw rod, and the outer side of the anchor head sleeve is wrapped with the resin anchoring agent encapsulated in the bag body; the upper supporting device comprises a hinging seat fixedly connected with the lower end of the anchor head of the resin anchoring agent, a plurality of connecting rods are hinged at intervals on the periphery of the hinging seat, a fixing seat is fixed on the upper part of the screw rod and positioned on the lower side of the hinging seat, an upper supporting rod is correspondingly hinged on the fixing seat and positioned on the lower side of the connecting rod, one end of the connecting rod is hinged with the hinging seat, and the other end of the connecting rod is hinged with the middle part of the upper supporting rod; the prestress adjusting device comprises an upper fixing plate which is in threaded connection with the upper part of a screw rod, a plurality of prestress steel strands are fixed on the periphery of the upper fixing plate at intervals, a lower fixing plate is in threaded connection with the lower part of the screw rod, a plurality of bolts which are arranged from bottom to top are in threaded connection with the periphery of the lower fixing plate at intervals, and the bolts are welded with the lower ends of the corresponding prestress steel strands; the locking mechanism comprises a gasket sleeved on the screw rod and positioned at the lower side of the slurry stop plug, and a locking nut is screwed at the lower side of the gasket on the screw rod.
2. The grouting anchor rod for anchoring prestressed components at two ends of an underground mine roadway according to claim 1, wherein the self-locking mechanism comprises a vertical blind hole which is arranged in an anchor head sleeve from bottom to top, a connecting rod which penetrates through a hinging seat and is used for being connected with the upper end of a screw rod is arranged in the vertical blind hole, the upper end of the connecting rod is connected with the top of the vertical blind hole through a spring, and a locking mechanism which is matched with the anchor head sleeve after descending is arranged on the connecting rod.
3. The grouting anchor rod for anchoring prestressed components at two ends of an underground mine roadway according to claim 2, wherein the locking mechanism comprises a longitudinal blind hole arranged on the front side wall and the rear side wall of the vertical blind hole, transverse through holes are formed in the two side walls of the vertical blind hole and located on the lower side of the longitudinal blind hole, upper spring ejector pins are respectively arranged on the front side and the rear side of the upper portion of the connecting rod, and lower spring ejector pins are arranged on the two side portions of the connecting rod and located on the lower side of the upper spring ejector pins.
4. The grouting anchor rod for anchoring prestressed components at two ends of an underground mine roadway according to claim 1, wherein the grouting mechanism comprises a primary grouting pipe and a secondary grouting pipe which are arranged at two sides of a screw rod, vertical through holes are respectively arranged at two sides of the upper fixing plate and the lower fixing plate, the upper ends of the primary grouting pipe and the secondary grouting pipe respectively penetrate through the corresponding vertical through holes on the upper fixing plate and are fixed on the screw rod through buckles, and the lower ends of the primary grouting pipe and the secondary grouting pipe respectively penetrate through the corresponding vertical through holes on the lower fixing plate and are penetrated out of a tray.
5. The grouting anchor rod for anchoring prestressed components at two ends of an underground mine roadway according to claim 1, 2, 3 or 4, wherein the lower portion screwing support device comprises an upper fixing plate connected with the lower portion of a screw rod, lower support rods are hinged to the peripheral portion of the upper fixing plate at intervals, the lower fixing plate is sleeved on the lower side of the upper fixing plate on the screw rod, screwing nuts driving the lower fixing plate to lift are screwed on the screw rod, and supporting rods with the upper ends hinged to the middle portions of the lower support rods are correspondingly hinged to the peripheral portion of the lower fixing plate.
6. The grouting anchor rod for anchoring prestressed components at two ends of an underground mine roadway according to claim 5, wherein the upper fixing plate comprises an upper fixing nut in threaded connection with a screw, a connecting plate for hinging with a lower supporting rod is sleeved on the lower side of the upper fixing nut on the screw, four lower supporting rods are hinged on the connecting plate at intervals, and the lower fixing nut is in threaded connection with the lower side of the connecting plate on the screw; the other end of the lower supporting rod is provided with a sucking disc type disc.
7. A method of using the grouting anchor rod for anchoring prestressed members at two ends of an underground mine roadway as recited in claim 5, comprising the steps of:
1) The anchor rod cock is put into a supporting hole of a roadway or a cave stratum, so that the resin anchoring agent is used for fixing the anchor rod;
2) Pulling down the screw rod to expand the upper support device and clamp the wall of the support hole;
3) The lower part of the screwing support device is unfolded by rotating the screwing nut upwards, and the hole wall of the support hole is clamped again;
4) Firmly supporting the tray against the Kong Waiyan wall of the supporting hole, installing the grout stop plug, and locking the grout stop plug and the tray through a locking mechanism;
5) Grouting into the support hole by a grouting mechanism until the slurry in the pipe cannot enter the hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810914422.8A CN108825278B (en) | 2018-08-13 | 2018-08-13 | Grouting anchor rod for anchoring prestress component of underground mine roadway and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810914422.8A CN108825278B (en) | 2018-08-13 | 2018-08-13 | Grouting anchor rod for anchoring prestress component of underground mine roadway and using method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108825278A CN108825278A (en) | 2018-11-16 |
| CN108825278B true CN108825278B (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810914422.8A Active CN108825278B (en) | 2018-08-13 | 2018-08-13 | Grouting anchor rod for anchoring prestress component of underground mine roadway and using method thereof |
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| CN111648806B (en) * | 2020-07-09 | 2021-05-14 | 中国科学院地质与地球物理研究所 | Energy-absorbing anchor rod device with umbrella-shaped structure |
| CN113047881B (en) * | 2021-05-07 | 2023-09-26 | 南京博联特光电科技有限公司 | GFRP intelligent combined anchor rod suitable for subway roadway support and construction method |
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| CN205422779U (en) * | 2016-03-24 | 2016-08-03 | 山东科技大学 | Side direction supports and to let pressure formula slip casting stock |
| CN106567384A (en) * | 2016-11-14 | 2017-04-19 | 合肥工业大学 | Fishbone-shaped anchor rod |
| CN207004554U (en) * | 2017-08-02 | 2018-02-13 | 中铁十四局集团第二工程有限公司 | A kind of multistage allows pressure grouting anchor pole |
| CN208587173U (en) * | 2018-08-13 | 2019-03-08 | 福州大学 | A kind of both ends anchoring prestress component grouted anchor bar for underground mine tunnel |
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2018
- 2018-08-13 CN CN201810914422.8A patent/CN108825278B/en active Active
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| CN108825278A (en) | 2018-11-16 |
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