CN107288671B - Construction method of soft crushed coal rock mass drilling, sealing and injecting integrated extendable anchor rod - Google Patents
Construction method of soft crushed coal rock mass drilling, sealing and injecting integrated extendable anchor rod Download PDFInfo
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- CN107288671B CN107288671B CN201710718310.0A CN201710718310A CN107288671B CN 107288671 B CN107288671 B CN 107288671B CN 201710718310 A CN201710718310 A CN 201710718310A CN 107288671 B CN107288671 B CN 107288671B
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- 238000005553 drilling Methods 0.000 title claims abstract description 46
- 239000011435 rock Substances 0.000 title claims abstract description 33
- 238000007789 sealing Methods 0.000 title claims abstract description 31
- 239000003245 coal Substances 0.000 title claims abstract description 26
- 238000010276 construction Methods 0.000 title claims abstract description 19
- 239000011440 grout Substances 0.000 claims description 9
- 238000004873 anchoring Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 abstract description 4
- 238000011900 installation process Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 101100334009 Caenorhabditis elegans rib-2 gene Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Classifications
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- 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor 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
- E21D20/028—Devices or accesories for injecting a grouting liquid in a bore-hole
-
- 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
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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 soft crushed coal rock mass drilling, sealing and injecting integrated extendable anchor rod comprises an anchor rod drill bit, a hollow end anchor rod, a first anchor rod connecting piece, a hollow extendable anchor rod, a second anchor rod connecting piece and an anchor rod drilling machine adapter which are sequentially arranged from the front end to the rear end in the same axial direction; the rear end of the anchor rod drill bit is connected with the front end of the hollow end anchor rod, the front end part and the rear end part of the first anchor rod connecting piece are respectively connected with the rear end of the hollow end anchor rod and the front end of the hollow connectable anchor rod, and the front end part and the rear end part of the second anchor rod connecting piece are respectively connected with the rear end of the hollow connectable anchor rod and the front end of the jumbolter adapter. The invention also discloses a construction method of the extendable anchor rod, which can realize the reinforcement and support of the loose and broken surrounding rock of the coal mine roadway, can be lengthened to adapt to different loose and broken area ranges and can adapt to the large deformation of the surrounding rock of the roadway, has exquisite and reasonable design and simple installation process, and is mainly suitable for the reinforcement engineering of the loose and broken area of the coal mine roadway or the soft rock roadway.
Description
Technical Field
The invention belongs to the field of soft crushed coal rock mass support of coal mine tunnels, and particularly relates to a soft crushed coal rock mass drilling, sealing and injecting integrated extendable anchor rod and a construction method thereof.
Background
Coal is the main energy form in China, and occupies more than 50% of primary energy consumption proportion in China for a long time. Coal mining needs to dig a series of roadways, and the effective support of the roadways is important to the high yield and high efficiency of coal mines. In a plurality of roadways, the influence of mining, geological structures, coal forming environments and the like causes the loose and broken surrounding rock roadway to occupy a large proportion, the supporting difficulty is high and the cost is high. Under the prior art condition, the state of loose and broken surrounding rocks of the roadway is changed by mostly adopting a supporting mode taking a grouting anchor rod as a core, so that the roadway becomes a complete structure, and the roadway has good bearing capacity. Traditional slip casting stock structure is complicated, and the higher and its length of cost causes the anchor length to receive the restriction by the influence of tunnel height and width, and stock work progress technology is complicated, and the low unable adaptation country rock of body of rod percentage of elongation warp greatly, and is higher to equipment and field work personnel technical merit requirement, therefore can't obtain wide application in the aspect of soft broken coal rock mass support in coal mine tunnel, and then leads to this kind of tunnel support to face the bottleneck problem, threatens staff life safety and the high yield efficient realization of mine.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the soft crushed coal rock mass drilling, sealing and injection integrated extendable anchor rod which has the advantages of simple structure, convenience in construction, low cost, firm support and adaptability to large deformation of surrounding rock and the construction method thereof.
In order to solve the technical problems, the invention adopts the following technical scheme: the soft crushed coal rock drilling, sealing and injecting integrated extendable anchor rod comprises an anchor rod drill bit 1, a hollow end anchor rod 3, a first anchor rod connecting piece 4, a hollow extendable anchor rod 5, a second anchor rod connecting piece 8 and an anchor rod drilling machine adapter 9 which are sequentially arranged from the front end to the rear end in the same axial direction; the rear end of roofbolt drill bit 1 stretches into and threaded connection is inside the front end of cavity end stock 3, the preceding tip and the back tip of first roofbolt connecting piece 4 stretch into respectively and threaded connection can connect inside the front end of roofbolt 5 in the rear end of cavity end stock 3 and the cavity, the front end of second roofbolt connecting piece 8 stretches into and threaded connection can connect inside the rear end of roofbolt 5 in the cavity, the rear end of second roofbolt connecting piece 8 stretches into and threaded connection is inside the front end of roofbolt rig crossover sub 9, the rear portion of roofbolt rig crossover sub 9 is the hexagonal prism structure 14 of being connected with the roofbolt rig transmission, the rear end excircle of cavity can connect roofbolt 5 is provided with the external screw thread.
Two wrench clamping grooves 6 are arranged on the circumferential surfaces of the front part and the rear part of the hollow end anchor rod 3 and the hollow connectable anchor rod 5 in a centrosymmetric manner.
Two wrench clamping planes 15 are symmetrically arranged on the circumferential surfaces of the first anchor rod connecting piece 4 and the second anchor rod connecting piece 8.
The anchor rod drill bit 1 is internally provided with a through hole communicated with the inside of the hollow end anchor rod 3, and the outer circumferential surface of the hollow end anchor rod 3 is fixedly provided with spiral slag-discharging convex ribs 2.
The construction method of the soft crushed coal rock mass drilling, sealing and injecting integrated extendable anchor rod comprises the following steps,
(a) Inserting the hexagonal prism structure 14 of the jumbolter crossover sub 9 into the power take-off interface of the jumbolter;
(b) Connecting an adapter 9 of an anchor rod drilling machine with a second anchor rod connecting piece 8, screwing an anchor rod drill bit 1 to the front end of an anchor rod 3 at the hollow end, assembling the anchor rod 3 at the hollow end and a hollow connectable anchor rod 5 to a required length by using a first anchor rod connecting piece 4, and then connecting and screwing the rear end of the hollow connectable anchor rod 5 with the front end of the second anchor rod connecting piece 8 in a threaded manner; when the required drilling length exceeds the width or the height of the roadway, the first anchor rod connecting piece 4 is continuously adopted to connect the hollow connectable anchor rod 5 in the drilling process so as to meet the length requirement;
(c) The anchor rod drill bit 1 is aligned with a set drilling point, an anchor rod drilling machine is started, the long anchor rod assembled in the step 2 is drilled into the soft crushed coal rock body until the rear part of the last hollow connectable anchor rod 5 is exposed to the designed length, then the drilling machine is taken down, and the adapter 9 and the second anchor rod connecting piece 8 of the anchor rod drilling machine are dismounted;
(d) Cleaning and leveling rock surfaces around an anchoring hole, installing a hole sealing tray 7 on a hollow connectable anchor rod 5, screwing a nut 10 on an external thread at the rear end part of the hollow connectable anchor rod 5 and pressing the hole sealing tray 7 tightly, then connecting a grouting stop valve 11 with the rear end of the hollow connectable anchor rod 5, connecting the front end of the grouting stop valve 11 with a grouting pump connecting pipe, then opening the grouting stop valve 11, starting a grouting pump, injecting grout into a fly-ring-shaped gap between the outer wall of a long anchor rod and a drill hole after sequentially passing through the grouting stop valve 11, the hollow connectable anchor rod 5, a first anchor rod connecting piece 4, a hollow end anchor rod 3 and an anchor rod drill bit 1, and blocking the grout from overflowing inside and outside the drill hole by the hole sealing tray 7;
(e) The pressure gauge is arranged on the grouting pump connecting pipe, after the pressure on the pressure gauge reaches a set value, the grouting stop valve 11 is closed, the grouting pump connecting pipe and the grouting pump are disassembled, and the grouting stop valve 11 is taken down after the grout is solidified, so that the anchoring construction of the long anchor rod is completed.
The outlet end of the rear end of the grouting stop valve 11 is provided with a grouting pipe joint 12 with external threads, and the grouting pipe joint 12 extends into and is in threaded connection with the inner part of the rear end of the hollow connectable anchor rod 5.
The front end of the hole sealing tray 7 is fixedly connected with a hollow rubber plug 13 extending into a drilled hole, the inner diameter of the hollow rubber plug 13, the outer diameter of the hollow end anchor rod 3 and the outer diameter of the hollow connectable anchor rod 5 are equal, the outer circumference of the hollow rubber plug 13 is of a conical structure with a thin front part and a thick rear part, and the outer diameter of the thinnest end of the front end part of the hollow rubber plug 13 is equal to the inner diameter of the drilled hole.
Compared with the prior art, the invention has the following technical effects by adopting the technical scheme:
1. the grouting stop valve is a recyclable component, and compared with a traditional grouting anchor rod, the grouting stop valve can save cost.
2. The long anchor rod body comprises a hollow end anchor rod and a hollow connectable anchor rod (the standard length of the long anchor rod body is 1.0m, the long anchor rod body can be reasonably assembled by utilizing a first anchor rod connecting piece according to the width of a loose and broken area of surrounding rock, so that the long anchor rod body has wider application range than that of a traditional grouting anchor rod, and the long anchor rod body adopts high-strength and high-elongation steel and the elongation of the lengthened part enables the anchored rod body to have good elongation, so that the long anchor rod body can adapt to large deformation of the surrounding rock.
3. The hole sealing tray is characterized in that a hollow rubber plug with a certain length is additionally arranged on the basis of the traditional hole sealing tray, when a nut presses the hole sealing tray, the hollow rubber plug is pressed into a hole of a drilled hole, the outer circumference of the hollow rubber plug is of a conical structure with a thin front part and a thick rear part, and the tightness is stronger when the nut presses the hole sealing tray, so that the hole sealing effect can be fully improved, and the problem of the traditional grouting anchor rod hole sealing process is solved.
4. The components in the invention are connected in a threaded manner, so that the split type LED lamp is convenient to manufacture in a split mode and has the effect of convenient assembly.
5. The long anchor rod has the function of drilling the drill rod and the function of sealing the hole pipe, achieves two purposes at one time, avoids hole collapse after the drill rod is drawn out after drilling, achieves two purposes at one time, saves the time of anchoring construction, and also saves the construction cost.
In conclusion, the invention can realize the reinforcement and support of the coal mine tunnel loose and broken surrounding rocks, can also be lengthened to adapt to different loose and broken area ranges and can adapt to the large deformation of the tunnel surrounding rocks, the anchor rod is used as a grouting anchor rod after being drilled into the rock mass, the design is exquisite and reasonable, the installation process is simple, the problems of complex construction process, complex structure and the like of the traditional grouting anchor rod support are solved, and the invention is mainly suitable for the reinforcement engineering of the coal mine tunnel loose and broken area or soft rock tunnel.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic perspective view of a grouting stop valve according to the present invention;
FIG. 3 is a schematic perspective view of the adapter of the present invention for a jumbolter;
fig. 4 is a perspective view of the hollow end bolt of the present invention;
fig. 5 is a perspective view of the hollow engageable anchor rod of the present invention;
FIG. 6 is a schematic perspective view of the hole sealing tray according to the present invention;
fig. 7 is a schematic view of the construction of the rock bolt bit of the present invention.
Detailed Description
As shown in fig. 1-7, the soft crushed coal rock drilling, sealing and injecting integrated lengthening anchor rod comprises an anchor rod drill bit 1, a hollow end anchor rod 3, a first anchor rod connecting piece 4, a hollow connecting anchor rod 5, a second anchor rod connecting piece 8 and an anchor rod drilling machine conversion joint 9 which are sequentially arranged from the front end to the rear end in the same axial direction; the rear end of roofbolt drill bit 1 stretches into and threaded connection is inside the front end of cavity end stock 3, the preceding tip and the rear end of first roofbolt connecting piece 4 stretch into respectively and threaded connection can connect inside the front end of stock 5 in the rear end of cavity end stock 3 and the cavity, the front end of second roofbolt connecting piece 8 stretches into and threaded connection can connect inside the rear end of stock 5 in the cavity, the rear end of second roofbolt connecting piece 8 stretches into and threaded connection is inside the front end of roofbolt rig crossover sub 9, the rear portion of roofbolt rig crossover sub 9 is the hexagonal prism structure 14 of being connected with the roofbolt rig transmission, the rear end excircle of cavity can connect to stock 5 is provided with the external screw thread.
Two wrench clamping grooves 6 are arranged on the circumferential surfaces of the front part and the rear part of the hollow end anchor rod 3 and the hollow connectable anchor rod 5 in a centrosymmetric manner.
Two wrench clamping planes 15 are symmetrically arranged on the circumferential surfaces of the first anchor rod connecting piece 4 and the second anchor rod connecting piece 8. The wrench clamping groove 6 and the wrench clamping plane 15 are used for axial threaded connection after a worker clamps the wrench.
The anchor rod drill bit 1 is internally provided with a through hole communicated with the inside of the hollow end anchor rod 3, and the outer circumferential surface of the hollow end anchor rod 3 is fixedly provided with a spiral slag-discharging convex rib 2.
The invention relates to a construction method of a soft crushed coal rock mass drilling, sealing and injection integrated extendable anchor rod, which comprises the following steps,
(a) Inserting the hexagonal prism structure 14 of the jumbolter crossover sub 9 into the power take-off interface of the jumbolter;
(b) Connecting an adapter 9 of an anchor rod drilling machine with a second anchor rod connecting piece 8, screwing an anchor rod drill bit 1 to the front end of an anchor rod 3 at the hollow end, assembling the anchor rod 3 at the hollow end and a hollow connectable anchor rod 5 to a required length by using a first anchor rod connecting piece 4, and then connecting and screwing the rear end of the hollow connectable anchor rod 5 with the front end of the second anchor rod connecting piece 8 in a threaded manner; when the required drilling length exceeds the width or the height of a roadway, a first anchor rod connecting piece 4 is continuously adopted to connect a hollow connectable anchor rod 5 in the drilling process so as to meet the length requirement;
(c) The anchor rod drill bit 1 is aligned with a set drilling point, an anchor rod drilling machine is started, the long anchor rod assembled in the step 2 is drilled into the soft crushed coal rock body until the rear part of the last hollow connectable anchor rod 5 is exposed to the designed length, then the drilling machine is taken down, and the adapter 9 and the second anchor rod connecting piece 8 of the anchor rod drilling machine are dismounted;
(d) Cleaning and leveling rock surfaces around anchoring holes, installing a hole sealing tray 7 on a hollow connectable anchor rod 5, screwing a nut 10 on an external thread at the rear end part of the hollow connectable anchor rod 5 and pressing the hole sealing tray 7 tightly, then connecting a grouting stop valve 11 with the rear end of the hollow connectable anchor rod 5, connecting the front end of the grouting stop valve 11 with a grouting pump connecting pipe, then opening the grouting stop valve 11, starting a grouting pump, injecting grout into a fly-ring-shaped gap between the outer wall of a long anchor rod and a drill hole sequentially through the grouting stop valve 11, the hollow connectable anchor rod 5, a first anchor rod connecting piece 4, a hollow end anchor rod 3 and an anchor rod drill bit 1, and blocking the grout from overflowing inside and outside the drill hole by the hole sealing tray 7;
(e) The pressure gauge is arranged on the grouting pump connecting pipe, after the pressure on the pressure gauge reaches a set value, the grouting stop valve 11 is closed, the grouting pump connecting pipe and the grouting pump are disassembled, and the grouting stop valve 11 is taken down after the grout is solidified, so that the anchoring construction of the long anchor rod is completed.
The outlet end of the rear end of the grouting stop valve 11 is provided with a grouting pipe joint 12 with external threads, and the grouting pipe joint 12 extends into and is in threaded connection with the inner part of the rear end of the hollow connectable anchor rod 5.
The front end of the hole sealing tray 7 is fixedly connected with a hollow rubber plug 13 extending into a drilled hole, the inner diameter of the hollow rubber plug 13, the outer diameter of the hollow end anchor rod 3 and the outer diameter of the hollow connectable anchor rod 5 are equal, the outer circumference of the hollow rubber plug 13 is of a conical structure with a thin front part and a thick rear part, and the outer diameter of the thinnest end of the front end part of the hollow rubber plug 13 is equal to the inner diameter of the drilled hole.
The present embodiment is not intended to limit the shape, material, structure, etc. of the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (3)
1. The construction method of the soft crushed coal rock mass drilling, sealing and injecting integrated extendable anchor rod is characterized in that: the soft crushed coal rock mass drilling, sealing and injecting integrated extendable anchor rod comprises an anchor rod drill bit (1), a hollow end anchor rod (3), a first anchor rod connecting piece (4), a hollow extendable anchor rod (5), a second anchor rod connecting piece (8) and an anchor rod drilling machine adapter (9) which are coaxially and sequentially arranged from the front end to the rear end; the rear end of an anchor rod drill bit (1) stretches into and is in threaded connection with the interior of the front end of a hollow end anchor rod (3), the front end part and the rear end part of a first anchor rod connecting piece (4) respectively stretch into and are in threaded connection with the interior of the rear end of the hollow end anchor rod (3) and the interior of the front end of a hollow connectable anchor rod (5), the front end of a second anchor rod connecting piece (8) stretches into and is in threaded connection with the interior of the rear end of the hollow connectable anchor rod (5), the rear end of the second anchor rod connecting piece (8) stretches into and is in threaded connection with the interior of the front end of an anchor rod drilling machine conversion joint (9), the rear part of the anchor rod drilling machine conversion joint (9) is of a hexagonal prism structure (14) in transmission connection with an anchor rod drilling machine, and the excircle of the rear end part of the hollow connectable anchor rod (5) is provided with an external thread;
two wrench clamping grooves (6) are arranged on the circumferential surfaces of the front part and the rear part of the hollow end anchor rod (3) and the hollow connectable anchor rod (5) in a centrosymmetric manner;
two wrench clamping planes (15) are arranged on the circumferential surfaces of the first anchor rod connecting piece (4) and the second anchor rod connecting piece (8) in a centrosymmetric manner;
a through hole communicated with the interior of the hollow end anchor rod (3) is formed in the anchor rod drill bit (1), and a spiral slag-discharging convex rib (2) is fixedly arranged on the outer circumferential surface of the hollow end anchor rod (3);
the construction method comprises the following steps of,
(a) Inserting the hexagonal prism structure (14) of the conversion joint (9) of the anchor drilling machine into a power output interface of the anchor drilling machine;
(b) Connecting an adapter (9) of an anchor rod drilling machine with a second anchor rod connecting piece (8), screwing an anchor rod drill bit (1) to the front end of a hollow end anchor rod (3), assembling the hollow end anchor rod (3) and a hollow connectable anchor rod (5) to a required length by using a first anchor rod connecting piece (4), and then connecting and screwing the rear end of the hollow connectable anchor rod (5) and the front end of the second anchor rod connecting piece (8) in a threaded manner; when the required drilling length exceeds the width or the height of a roadway, a first anchor rod connecting piece (4) is continuously adopted to be connected with a hollow connectable anchor rod (5) in the drilling process so as to meet the length requirement;
(c) Aligning the anchor rod drill bit (1) to a set drilling point, starting an anchor rod drilling machine, drilling the long anchor rod assembled in the step (2) into the soft crushed coal rock body until the rear part of the last hollow connectable anchor rod (5) is exposed to the designed length, then taking down the drilling machine, and detaching the adapter (9) and the second anchor rod connecting piece (8) of the anchor rod drilling machine;
(d) Cleaning and leveling rock surfaces around an anchoring hole, installing a hole sealing tray (7) on a hollow connectable anchor rod (5), screwing a nut (10) on an external thread at the rear end part of the hollow connectable anchor rod (5) and pressing the hole sealing tray (7), then connecting a grouting stop valve (11) with the rear end of the hollow connectable anchor rod (5), connecting the front end of the grouting stop valve (11) with a grouting pump connecting pipe, then opening the grouting stop valve (11), starting a grouting pump, injecting grout into a flying ring-shaped gap between the outer wall of a long anchor rod and a drill hole after sequentially passing through the grouting stop valve (11), the hollow connectable anchor rod (5), a first anchor rod connecting piece (4), the hollow end anchor rod (3) and an anchor rod drill bit (1), and blocking the grout from overflowing inside and outside the drill hole by the hole sealing tray (7);
(e) And a pressure gauge is arranged on the grouting pump connecting pipe, when the pressure on the pressure gauge reaches a set value, the grouting stop valve (11) is closed, the grouting pump connecting pipe and the grouting pump are disassembled, and the grouting stop valve (11) is taken down after the grout is solidified, so that the anchoring construction of the long anchor rod is completed.
2. The construction method according to claim 1, characterized in that: the outlet end of the rear end of the grouting stop valve (11) is provided with a grouting pipe joint (12) with external threads, and the grouting pipe joint (12) extends into the hollow connectable anchor rod (5) and is in threaded connection with the inside of the rear end of the hollow connectable anchor rod (5).
3. The construction method according to claim 2, wherein: hole sealing tray (7) front end fixedly connected with stretches into hollow rubber stopper (13) in the drilling, and the internal diameter of hollow rubber stopper (13), the external diameter of hollow end stock (3) and the external diameter that cavity can connect stock (5) equal, and the outer circumference of hollow rubber stopper (13) is the thick conical structure in thin back in the front, and the external diameter of the thinnest end of hollow rubber stopper (13) preceding tip equals the internal diameter of drilling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710718310.0A CN107288671B (en) | 2017-08-21 | 2017-08-21 | Construction method of soft crushed coal rock mass drilling, sealing and injecting integrated extendable anchor rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710718310.0A CN107288671B (en) | 2017-08-21 | 2017-08-21 | Construction method of soft crushed coal rock mass drilling, sealing and injecting integrated extendable anchor rod |
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| CN107288671B true CN107288671B (en) | 2023-03-14 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798734A (en) * | 2018-06-22 | 2018-11-13 | 贵州大学 | A kind of outer anchor pole for the double-deck anchor pole |
| CN108843357B (en) * | 2018-06-22 | 2020-12-25 | 贵州大学 | Double-layer rock anchor rod and construction method |
| CN110644944B (en) * | 2019-08-26 | 2021-05-18 | 中煤科工集团西安研究院有限公司 | Outer flat type high-pressure rotary jet grouting device and method for complex stratum under coal mine |
| CN111734462B (en) * | 2020-07-31 | 2021-12-07 | 魏群 | Anchor grouting structure |
| CN112431624A (en) * | 2020-11-16 | 2021-03-02 | 河南理工大学 | One-step anchor rod and supporting operation method thereof |
| GB2609017B (en) * | 2021-07-16 | 2023-07-12 | Hypertunnel Ip Ltd | Integrated drilling injection and extraction device and method |
| CN113586110B (en) * | 2021-07-21 | 2024-06-25 | 山西中煤担水沟煤业有限公司 | Drilling device for mine soft broken surrounding rock and supporting method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2524031A1 (en) * | 1982-03-29 | 1983-09-30 | Bertrand Jean | Ground anchor for guy line - has tapped socket and threaded pin for anchor extension |
| CN104047625B (en) * | 2013-10-11 | 2016-02-17 | 江苏鼎泰工程材料有限公司 | A kind of rock mass reinforcing method of reinforcing anchor pole and applying this anchor pole |
| CN104747216B (en) * | 2015-04-22 | 2017-01-11 | 河南理工大学 | Ultra-soft cracked coal and rock mass drill and grouting integrated fractional grouting method |
| EA037677B1 (en) * | 2015-05-08 | 2021-04-29 | Нормет Интернэшнэл Лтд. | Locally anchored self-drilling hollow rock bolt |
| CN204804863U (en) * | 2015-05-30 | 2015-11-25 | 高安森 | From formula of boring joinable prestressing force slip casting stock |
| CN106337692B (en) * | 2016-11-25 | 2018-08-24 | 中国矿业大学 | It is a kind of be suitable for weak coal petrography from boring from anchor extensible anchor pole and its anchoring process |
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