CN215566030U - Self-drilling hollow anchor rod suitable for coal mine soft rock roadway - Google Patents
Self-drilling hollow anchor rod suitable for coal mine soft rock roadway Download PDFInfo
- Publication number
- CN215566030U CN215566030U CN202121311361.XU CN202121311361U CN215566030U CN 215566030 U CN215566030 U CN 215566030U CN 202121311361 U CN202121311361 U CN 202121311361U CN 215566030 U CN215566030 U CN 215566030U
- Authority
- CN
- China
- Prior art keywords
- anchor rod
- hollow
- rod body
- hollow cylindrical
- drilling
- 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.)
- Expired - Fee Related
Links
- 239000011435 rock Substances 0.000 title claims abstract description 27
- 238000005553 drilling Methods 0.000 title claims abstract description 23
- 239000003245 coal Substances 0.000 title claims abstract description 14
- 239000011440 grout Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 9
- 238000004873 anchoring Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 3
- 230000010354 integration Effects 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E21D21/0053—Anchoring-bolts in the form of lost drilling rods
-
- 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
-
- 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
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)
- Earth Drilling (AREA)
- Piles And Underground Anchors (AREA)
Abstract
A self-drilling hollow anchor rod suitable for a coal mine soft rock roadway is characterized in that a propelling device is arranged in an inner cavity of an anchor rod body, a spiral rod in the propelling device enters a gap between limiting blocks of a sliding section from the bottom of a hollow cavity of the anchor rod body from the upper end, the sliding section is driven to rotate in the process of driving the sliding section to push upwards, when a ratchet wheel at the upper end of the sliding section moves upwards to the inner part of the lower end of a fixed end and is meshed with an inner gear, the anchor rod body is driven to rotate, the anchor rod body can be driven to drill upwards under the action of the rotating force until the upper end of the spiral rod pushes the upper end of the spiral rod to the top of the anchor rod body, the spiral rod is pulled downwards, the ratchet wheel slides downwards under the action of the spiral rod and is not contacted with the inner gear, meanwhile, chips can be discharged in the downward pulling process of the spiral rod, the steps are repeated until the anchor rod drills into surrounding rock, the drilling and anchoring integration is realized, and the anchor rod installation step is simplified; the anchor rod is suitable for soft rock stratums, the anchor rod is automatically drilled in the process of drilling, and the phenomenon of collapse of the drilled hole is avoided.
Description
Technical Field
The utility model relates to an anchor rod, in particular to a self-drilling hollow anchor rod suitable for a coal mine soft rock roadway, and belongs to the technical field of coal mine soft rock roadway support.
Background
The anchor bolt support is used as the most common support mode in a coal mine roadway, can effectively improve the bearing capacity of surrounding rocks, and controls the deformation of the surrounding rocks.
The anchor rod among the prior art also has certain problem at the in-process of coal mine tunnel support application: on one hand, the step of installing the anchor rod is trivial, drilling equipment needs to be adopted for drilling in advance, and then the anchor rod is installed in the drilled hole; on the other hand, in some soft rock formations, surrounding rocks are loose and broken, the drilled hole is easy to collapse, and the drilled hole is usually drilled again for many times when one anchor rod is installed.
Disclosure of Invention
Aiming at the problems in the prior art, the utility model provides a self-drilling hollow anchor rod suitable for a coal mine soft rock roadway, which can realize the integration of drilling and anchoring and simplify the installation steps of the anchor rod; the anchor rod drilling tool is suitable for soft rock stratums, the anchor rod is automatically drilled in the drilling process, and the collapse phenomenon of the drilled hole is avoided.
In order to achieve the purpose, the utility model adopts the technical scheme that the self-drilling type hollow anchor rod suitable for the coal mine soft rock tunnel comprises a drill bit and an anchor rod body, wherein the upper end of the anchor rod body is fixedly connected with the drill bit, a hollow cavity is arranged inside the anchor rod body, the drill bit is communicated with the hollow cavity through a notch, a plurality of grouting holes are formed in the anchor rod body, and the grouting holes penetrate through the outer wall of the anchor rod and the hollow cavity;
the anchor rod body is also provided with a propelling device, the propelling device comprises a spiral rod and a track section, the length of the spiral rod is greater than that of the hollow cavity of the anchor rod body, and the upper end of the spiral rod penetrates into the bottom of the hollow cavity of the anchor rod body;
the track section comprises a fixed section and a sliding section, the fixed section is a first hollow cylindrical barrel which is communicated up and down, the first hollow cylindrical barrel is fixed on the inner wall of the hollow cavity, and the axis of the first hollow cylindrical barrel is superposed with the axis of the hollow cavity; an inner gear is connected to the inner wall of the lower end of the first hollow cylindrical barrel along the circumferential direction of the first hollow cylindrical barrel;
the sliding section is positioned in the hollow cavity below the fixed section and is arranged in a sliding manner with the hollow cavity; the sliding section is a hollow cylindrical tube II which is communicated up and down, a spiral limiting block I and a limiting block II are arranged inside the hollow cylindrical tube II, the limiting block I and the limiting block II are respectively and oppositely arranged on two sides of the axis of the hollow cylindrical tube II along the length direction of the hollow cylindrical tube II, and a gap between the limiting block I and the limiting block II is matched with the spiral rod; the outer wall of the upper end of the hollow cylindrical barrel II is connected with a ratchet wheel along the circumferential direction of the hollow cylindrical barrel II, and the ratchet wheel is meshed with the internal gear;
the upper end of the screw rod sequentially penetrates through the second hollow cylindrical barrel and the first hollow cylindrical barrel from the bottom of the hollow cavity of the anchor rod body to reach the top of the anchor rod body;
the lower part of the anchor rod body is also sequentially provided with a grout stop plug, a tray and a nut from top to bottom.
Further, a rubber gasket is arranged between the tray and the nut.
Furthermore, the lower end of the screw rod is provided with a holding part.
Further, the drill bit is steel, and intensity is a little higher than rock mass intensity, and life is disposable.
Compared with the prior art, the utility model arranges the propelling device in the inner cavity of the anchor rod body, the screw rod in the propelling device enters the gap between the limiting blocks of the sliding section from the bottom of the hollow cavity of the anchor rod body from the upper end, the sliding section is driven to rotate in the process of driving the sliding section to propel upwards, when the ratchet wheel at the upper end of the sliding section moves upwards to the inner part of the lower end of the fixed end and is occluded with the inner gear, the anchor rod body is driven to rotate, the anchor rod body is driven to drill upwards under the action of the rotating force until the upper end of the screw rod is propelled to the top of the anchor rod body, the screw rod is pulled downwards, the ratchet wheel slides downwards under the action of the screw rod at the moment and is not contacted with the inner gear, meanwhile, the screw rod can drive scraps to discharge in the process of pulling downwards, the steps of enabling the screw rod to enter the sliding section and the fixed section from the bottom of the hollow cavity of the anchor rod body from the upper end and driving the anchor rod body to drill downwards are repeated until the anchor rod drills into the surrounding rock, the drilling and anchoring are integrated, and the anchor rod installation step is simplified; the anchor rod drilling tool is suitable for soft rock strata, automatic drilling of the anchor rod is realized while drilling, and the phenomenon of collapse of the drilled hole is avoided; the cost is saved, and the propelling device and the screw rod can be repeatedly used.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the construction of a track segment according to the present invention;
FIG. 3 is a schematic sectional view of the fixing section according to the present invention;
FIG. 4 is a schematic sectional view of a sliding section according to the present invention;
fig. 5 is a schematic view of the structure of the screw bar of the present invention.
In the figure: 1. the drilling bit, 2, the stock body, 3, the cavity, 4, the notch, 5, the slip casting hole, 6, the hob, 7, the fixed segment, 8, the slip segment, 9, a cavity cylinder one, 10, the internal gear, 11, a cavity cylinder two, 12, a stopper one, 13, a stopper two, 14, the clearance, 15, the ratchet, 16, the thick liquid stopper, 17, the tray, 18, the nut, 19, the rubber gasket, 20, the portion of gripping.
Detailed Description
The utility model will be further explained with reference to the drawings.
As shown in fig. 1 to 5, a self-drilling hollow anchor rod suitable for a coal mine soft rock tunnel comprises a drill bit 1 and an anchor rod body 2, wherein the upper end of the anchor rod body 2 is fixedly connected with the drill bit 1, a hollow cavity 3 is arranged inside the anchor rod body 2, the drill bit 1 is communicated with the hollow cavity 3 by arranging a notch 4, a plurality of grouting holes 5 are arranged on the anchor rod body 2, and the grouting holes 5 penetrate through the outer wall of the anchor rod body and the hollow cavity 3;
a propelling device is further arranged on the anchor rod body 2 and comprises a spiral rod 6 and a track section, the length of the spiral rod 6 is greater than that of the hollow cavity 3 of the anchor rod body, and the upper end of the spiral rod penetrates into the bottom of the hollow cavity 3 of the anchor rod body;
the track section comprises a fixed section 7 and a sliding section 8, the fixed section 7 is a first hollow cylindrical barrel 9 which is communicated up and down, the first hollow cylindrical barrel 9 is fixed on the inner wall of the hollow cavity 3, and the axis of the first hollow cylindrical barrel 9 is overlapped with the axis of the hollow cavity 3; an inner gear 10 is connected to the inner wall of the lower end of the first hollow cylindrical barrel 9 along the circumferential direction of the inner wall;
the sliding section 8 is positioned in the hollow cavity below the fixed section 7 and is arranged in a sliding manner with the hollow cavity 3; the sliding section 8 is a hollow cylinder II 11 which is through up and down, a spiral limiting block I12 and a limiting block II 13 are arranged inside the hollow cylinder II 11, the limiting block I12 and the limiting block II 13 are respectively arranged on two sides of the axis of the hollow cylinder II 11 along the length direction of the hollow cylinder II 11 in a relative mode, and a gap 14 between the limiting block I12 and the limiting block II 13 is matched with the screw rod 6; the outer wall of the upper end of the hollow cylindrical barrel II 11 is connected with a ratchet wheel 15 along the circumferential direction of the hollow cylindrical barrel II, and the ratchet wheel 15 is meshed with the internal gear 10;
the upper end of the screw rod 6 sequentially penetrates through a second hollow cylindrical barrel 11 and a first hollow cylindrical barrel 9 from the bottom of the hollow cavity 3 of the anchor rod body to reach the top of the anchor rod body 2;
the lower part of the anchor rod body 2 is also provided with a grout stop plug 16, a tray 17 and a nut 18 from top to bottom in sequence.
Preferably, a rubber gasket 19 is arranged between the tray 17 and the nut 18.
Preferably, the lower end of the screw rod 6 is provided with a grip portion 20.
Preferably, the drill bit 1 is made of steel, the strength of the drill bit is slightly higher than that of a rock body, and the service life of the drill bit is disposable.
When in use, the method comprises the following steps:
s1: assembling the anchor rod body and the drill bit to complete preparation for subsequent work;
s2: pushing up the screw rod, driving the ratchet wheel to move upwards and to be meshed with the inner gear while the screw rod is pushed upwards, driving the ratchet wheel to rotate by the screw rod, driving the inner gear to rotate by the ratchet wheel, and driving the anchor rod body to rotate by the inner gear;
s3: when the screw rod reaches the top of the anchor rod body and cannot continuously drill forwards, the screw rod is pulled downwards, the ratchet wheel slides downwards under the action of the screw rod and is not contacted with the inner gear any more, and meanwhile, the screw rod drives the chippings to be discharged in the pulling-down process;
repeating the steps S2 and S3 until the anchor rod body is drilled into the surrounding rock;
s4: injecting low-pressure water from the tail of the anchor rod body, and discharging debris;
s5: grouting from the tail of the anchor rod body, wherein grout flows out of the grouting holes and is combined with surrounding rocks to improve anchoring force;
s6: and (4) sequentially installing a grout stop plug, a tray, a rubber gasket and a nut to finish the operation.
Claims (4)
1. A self-drilling hollow anchor rod suitable for a coal mine soft rock tunnel comprises a drill bit and an anchor rod body, wherein the upper end of the anchor rod body is fixedly connected with the drill bit;
the anchor rod body is also provided with a propelling device, the propelling device comprises a spiral rod and a track section, the length of the spiral rod is greater than that of the hollow cavity of the anchor rod body, and the upper end of the spiral rod penetrates into the bottom of the hollow cavity of the anchor rod body;
the track section comprises a fixed section and a sliding section, the fixed section is a first hollow cylindrical barrel which is communicated up and down, the first hollow cylindrical barrel is fixed on the inner wall of the hollow cavity, and the axis of the first hollow cylindrical barrel is superposed with the axis of the hollow cavity; an inner gear is connected to the inner wall of the lower end of the first hollow cylindrical barrel along the circumferential direction of the first hollow cylindrical barrel;
the sliding section is positioned in the hollow cavity below the fixed section and is arranged in a sliding manner with the hollow cavity; the sliding section is a hollow cylindrical tube II which is communicated up and down, a spiral limiting block I and a limiting block II are arranged inside the hollow cylindrical tube II, the limiting block I and the limiting block II are respectively and oppositely arranged on two sides of the axis of the hollow cylindrical tube II along the length direction of the hollow cylindrical tube II, and a gap between the limiting block I and the limiting block II is matched with the spiral rod; the outer wall of the upper end of the hollow cylindrical barrel II is connected with a ratchet wheel along the circumferential direction of the hollow cylindrical barrel II, and the ratchet wheel is meshed with the internal gear;
the upper end of the screw rod sequentially penetrates through the second hollow cylindrical barrel and the first hollow cylindrical barrel from the bottom of the hollow cavity of the anchor rod body to reach the top of the anchor rod body;
the lower part of the anchor rod body is also sequentially provided with a grout stop plug, a tray and a nut from top to bottom.
2. A self-drilling hollow bolt suitable for use in a soft rock roadway of a coal mine as claimed in claim 1, wherein a rubber washer is provided between the tray and the nut.
3. A self-drilling hollow rock bolt suitable for use in a soft rock roadway of a coal mine according to claim 1 or 2, wherein the lower end of the screw rod is provided with a gripping portion.
4. A self-drilling hollow anchor rod suitable for a coal mine soft rock roadway as claimed in claim 3, wherein the drill bit is made of steel, the strength of the drill bit is slightly higher than that of the rock body, and the service life of the drill bit is one-time.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121311361.XU CN215566030U (en) | 2021-06-11 | 2021-06-11 | Self-drilling hollow anchor rod suitable for coal mine soft rock roadway |
| LU500382A LU500382B1 (en) | 2021-06-11 | 2021-07-02 | Self-drilling hollow rock bolt applicable to soft rock roadways |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121311361.XU CN215566030U (en) | 2021-06-11 | 2021-06-11 | Self-drilling hollow anchor rod suitable for coal mine soft rock roadway |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215566030U true CN215566030U (en) | 2022-01-18 |
Family
ID=79816771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121311361.XU Expired - Fee Related CN215566030U (en) | 2021-06-11 | 2021-06-11 | Self-drilling hollow anchor rod suitable for coal mine soft rock roadway |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN215566030U (en) |
| LU (1) | LU500382B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114562313A (en) * | 2022-03-02 | 2022-05-31 | 中国矿业大学 | Coal mine tunnel slip casting stock |
| CN114607428A (en) * | 2022-03-08 | 2022-06-10 | 长江水利委员会长江科学院 | Inner anchor type telescopic anchor rod for soft rock reinforcement and application method |
-
2021
- 2021-06-11 CN CN202121311361.XU patent/CN215566030U/en not_active Expired - Fee Related
- 2021-07-02 LU LU500382A patent/LU500382B1/en active IP Right Grant
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114562313A (en) * | 2022-03-02 | 2022-05-31 | 中国矿业大学 | Coal mine tunnel slip casting stock |
| CN114607428A (en) * | 2022-03-08 | 2022-06-10 | 长江水利委员会长江科学院 | Inner anchor type telescopic anchor rod for soft rock reinforcement and application method |
Also Published As
| Publication number | Publication date |
|---|---|
| LU500382B1 (en) | 2022-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2017301079B2 (en) | Supporting Method of An Extensible Reaming Self-Anchoring Anchor Rod | |
| CN215566030U (en) | Self-drilling hollow anchor rod suitable for coal mine soft rock roadway | |
| CN109236337B (en) | Arrow anchor rod anchored by multi-section type clamping grouting and using method thereof | |
| CA2994061C (en) | Supporting method of an extensible reaming self-anchoring anchor rod | |
| CN105888709B (en) | A kind of Self-propelled grouting anchoring-bolt | |
| CN110080810B (en) | Hydraulic drive type mining roadway anchor cable installation equipment | |
| CN112360505A (en) | Drilling, grouting, anchoring and pre-tightening integrated anchor rod supporting device and construction method | |
| CN102678040B (en) | Drilling device and method for baseplate in coal mine roadway | |
| CN105649632A (en) | Vertical shaft heading machine and tool bit assembly thereof | |
| CN107701213B (en) | A kind of in due course pressure device and its anchoring process of allowing can compensate for large deformation of roadway | |
| CN203248178U (en) | Downward-hole self-drilling grouting anchor rod | |
| CN100497887C (en) | Bush bulging shell type self-drilling hollow anchor rod | |
| CN110067580A (en) | A kind of pneumatic type mining tunnel baseboard anchor cable mounting device | |
| CN116771397A (en) | Drilling and anchoring integrated drilling device and application method thereof | |
| CN102767337B (en) | The construction method of a kind of sleeve type helical stake machine drill head and rid | |
| CN201723146U (en) | Bidirectional DTH hammer | |
| CN108518179B (en) | Coal mine tunnel bottom plate small-diameter anchor cable reverse circulation drilling machine and construction method | |
| CN201843132U (en) | Large-aperture deep-pile long-auger drilling rig | |
| CN102199991B (en) | Drilling-fixing integrated device and method for yolk coal terrane | |
| CN201474642U (en) | Stable feeding drilling jar | |
| CN205618162U (en) | Shaft sinking machine and tool bit subassembly thereof | |
| CN219061519U (en) | Anchor rod pore-forming enlarged bit device | |
| CN115637922B (en) | Anchor rod drilling machine for side slope support | |
| CN116575859A (en) | Drilling device without derrick and drill pipe sleeve follow-up and drilling method | |
| CN2298338Y (en) | Drilling for construction in clayed layer large tube shed |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220118 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |