CN108468559A - The end anchoring process and mating Hole drilling set of self tapping precession anchor pole - Google Patents
The end anchoring process and mating Hole drilling set of self tapping precession anchor pole Download PDFInfo
- Publication number
- CN108468559A CN108468559A CN201810384554.4A CN201810384554A CN108468559A CN 108468559 A CN108468559 A CN 108468559A CN 201810384554 A CN201810384554 A CN 201810384554A CN 108468559 A CN108468559 A CN 108468559A
- Authority
- CN
- China
- Prior art keywords
- self tapping
- anchor pole
- diameter
- drilling
- precession
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 71
- 238000010079 rubber tapping Methods 0.000 title claims abstract description 70
- 238000004873 anchoring Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000013011 mating Effects 0.000 title abstract description 3
- 238000010276 construction Methods 0.000 claims abstract description 9
- 239000003245 coal Substances 0.000 description 9
- 239000011435 rock Substances 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 4
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of end anchoring process of self tapping precession anchor pole and mating Hole drilling sets, the drilling of section different-diameter before and after one is drilled out in needing the tunnel anchored first, it is required that the bore diameter of leading portion should be equal to the minor diameter d of self tapping precession anchor pole, the bore diameter of back segment should be greater than the major diameter D of self tapping precession anchor pole, and the length of leading portion slim hole should meet the design length of anchor rod anchored section of self tapping precession；Then self tapping precession anchor pole is inserted into drilling, until reach minor diameter reducing at insert it is motionless until, it is again rotary force that self tapping precession anchor pole applies enough torques with drilling machine, self tapping precession anchor pole is set to screw into leading portion slim hole, pallet is installed outside hole and tightens nut, the pretightning force of design is reached, construction finishes.The present invention solves the problems, such as that people's anchor pole of self tapping precession for a long time can not achieve end anchor.
Description
Technical field
The present invention relates to coal mines to make the ophthalmically acceptable drilling tool of anchor pole.
Background technology
Anchor pole is the most basic component part of contemporary colliery tunnel support, he together, makes the surrounding rock consolidation in tunnel
Country rock itself supporting itself.Present anchor pole is applied not only to coal mine, is also used in other mining engineering and technologies, side slope, tunnel, dam
Body carries out main body reinforcing.The type of anchor pole is various, and self tapping precession anchor pole is exactly one such.The construction of self tapping precession anchor pole
It is that, using steel pipe or reinforcing bar as the body of rod of anchor pole, spiral winding point is burn-on triangle wire screw thread on the body of rod, forms the spiral shell of thread tapping
Bar；The diameter of the diameter of the body of rod, that is, Bottom of Thread section part is known as the minor diameter of self tapping precession anchor pole according to bolt mark regulation
D, similarly the diameter of self tapping precession spiral thread on anchor bolt crest section part be known as major diameter D.As long as one diameter of subdrilling is equal to when use
The drilling of steel pipe or reinforcing bar, will be in thread tapping hole wall of precession drilling as screw.The advantages of self tapping precession anchor pole is
It is anchored in ground by thread tapping, the anchor force of 70KN or more can be reached without Anchor Agent, belong to full length fastening structure, at
This is low, and speed of application is fast, easy for installation.But when hardness coefficient of rock f is more than 3 or drilling chin-deep, meeting adds with depth
Deep precession resistance is increasing, causes anchor pole that can not screw into bottom, of no avail high torque.So at present in coal mine
On may be only available for hardness factor f be less than 3 soft-rock tunnel and heading.In fact, in the common stone head of coal mine,
Be generally used end anchor structure, i.e., in the front end sub-fraction length of anchor pole together with borehole anchorage, referred to as anchoring section,
The rear end major part length of anchor pole is not anchored with hole wall, referred to as free segment；Generally anchored using anchoring cartridge.Due to hardness
Rocks of the coefficient f more than or equal to 3 does not need full length fastening, as long as end anchor structure, that is to say, that as long as foot of hole has one
Section anchorage length, just sufficiently achieves the anchor force of needs.Also when the anchor pole having needs to apply prestressing force, it is also desirable to certain length
Free segment, it is only necessary to end anchoring.But the hole that current boring bar tool drills out all is isodiametric, be cannot be satisfied certainly
Attack the punching requirement of precession anchor pole end anchor structure.
Invention content
To solve the above problems, the present invention proposes a kind of end anchoring process of self tapping precession anchor pole, while proposing to adapt to certainly
Attack Hole drilling set when precession anchor pole carries out end anchor.
A kind of end anchoring process of self tapping precession anchor pole, which is characterized in that drill out one in needing the tunnel anchored first
The drilling of a front and back section different-diameter, it is desirable that the bore diameter of leading portion should be equal to the minor diameter d of self tapping precession anchor pole, the brill of back segment
Bore dia should be greater than the major diameter D of self tapping precession anchor pole, and it is anchor rod anchored that the length of leading portion slim hole should meet self tapping precession
The design length of section；Then by self tapping precession anchor pole be inserted into drilling in, until arrival minor diameter reducing at insert it is motionless until, then
It is the rotary force that self tapping precession anchor pole applies enough torques with drilling machine, self tapping precession anchor pole is made to screw into leading portion slim hole
In, pallet is installed outside hole and tightens nut, reaches the pretightning force of design, construction finishes.
In order to drill out the drilling of section different-diameter before and after one, the present invention proposes a kind of adaptation self tapping precession anchor pole end
The Hole drilling set of anchoring.
The construction of the drilling tool is that it includes the drilling tool body being made of drill bit, drilling rod and drilling tail, which is characterized in that described
Drilling rod is the thin back segment of leading portion slightly two different shank diameters, and front and back two sections of front end is respectively equipped with the drill bit of different-diameter；
Wherein, the size of preceding bit diameter should ensure that drilled out aperture is equal to the minor diameter d of self tapping precession anchor pole, rear bit diameter
Size should ensure that drilled out aperture is more than or equal to the major diameter D of self tapping precession anchor pole, and the length of leading portion drilling rod should meet self tapping
The design length that anchor rod anchored section of precession；The minor diameter d of the self tapping precession anchor pole refers to self tapping precession spiral thread on anchor bolt tooth bottom
The diameter of section part, major diameter D refer to the diameter of self tapping precession spiral thread on anchor bolt crest section part, this is the basic of bolt mark
Common sense.
The positive effect of the present invention is to be more than the 3 common tunnel of the common soft-rock tunnel of coal mine and coal seam in hardness factor f
In, it can also be anchored using self tapping precession anchor pole by using end anchor structure, when giving full play to self tapping precession anchor bolt construction not
With Anchor Agent, installation speed is fast, easy for construction the advantages that.The application range for expanding self tapping precession anchor pole, it is long to solve people
Self tapping precession anchor pole can not achieve the problem of end anchor since phase.
Description of the drawings
Fig. 1 is the drilling schematic diagram of front and back section different-diameter when the method for the present invention is implemented；
Fig. 2 is the self tapping precession anchor pole end anchoring schematic diagram of the embodiment of the present invention；
Fig. 3 is the drilling tool organigram for the method for the present invention.
Marginal data, 1- self tapping precession anchor poles, 2- pallets, 3- nuts, drill bit before 4-, 5- drilling rod leading portions, drill bit after 6-,
7- drilling rod back segments, 8- drilling tails, the drilling of A- leading portions, the drilling of B- back segments, the length of a- leading portions drilling A, the length of b- back segments drilling B,
D, d is respectively self tapping precession anchor pole major diameter and minor diameter.
Specific implementation mode
Certain coal mine currently carries out the full anchoring support of heading using self tapping precession anchor pole, and self tapping precession anchor pole is
Spiral winding point is burn-on triangle wire on the reinforcing bar of diameter d=18mm, forms the screw rod of thread tapping, triangle wire height 10mm, i.e.,
Major diameter D=38mm (diameter for referring to self tapping precession spiral thread on anchor bolt crest section part), the minor diameter d=18mm of self tapping precession anchor pole
(diameter for referring to self tapping precession spiral thread on anchor bolt tooth bottom section part), the screw pitch 48mm of self tapping precession anchor pole, net long 2.0m.Anticipation uses
This self tapping precession anchor pole carries out end anchoring, anchor rod anchored section of design length in stone heads of the hardness factor f more than 3
450mm；Following methods are used according to the present invention：
As shown in Figure 1, the drilling of section different-diameter before and after one is drilled out in needing the tunnel anchored first, it is desirable that leading portion
The A diameters that drill should be equal to minor diameter, that is, 18mm of self tapping precession anchor pole, and back segment drilling B diameters should be greater than the big of self tapping precession anchor pole
Diameter 38mm takes 40mm, the length a of leading portion drilling A that should meet the design length 450mm of anchor rod anchored section of self tapping precession, back segment
The residue length b=1550mm of drilling B；Then self tapping precession anchor pole 1 is inserted into back segment drilling B as shown in Figure 2, until reaching
Inserted at the reducing of leading portion drilling A it is motionless until, then with drilling machine be the rotary force that self tapping precession anchor pole 1 applies enough torques, make from
It attacks precession anchor pole 1 to screw into leading portion drilling B, pallet 2 is installed outside hole and tightens nut 3, reaches the pretightning force of design,
Construction finishes.
In order to drill out the drilling of section different-diameter before and after one, the present invention proposes a kind of adaptation self tapping precession anchor pole end
The drilling tool of anchoring.
For the construction of the drilling tool as shown in figure 3, Fig. 3 is by taking twist drill rods as an example, it includes by 8 structure of drill bit, drilling rod and drilling tail
At drilling tool body, the drilling rod be the thin back segment of leading portion slightly two different shank diameters, i.e. drilling rod leading portion 5 and drilling rod back segment 7 are
Two different shank diameters, and the front end of drilling rod leading portion 5 and drilling rod back segment 7 is respectively equipped with the preceding drill bit 4 of different-diameter with after
Drill bit 6；Wherein, a diameter of 18mm of preceding drill bit 4 ensures that drilled out aperture is equal to the minor diameter d of self tapping precession anchor pole 1, after
9 a diameter of 38mm of drill bit can form the aperture of 40mm, that is, be more than the major diameter D of self tapping precession anchor pole 1, drilling rod leading portion 5 after drilling out
Length should meet the design length 450mm of 1 anchoring section of self tapping precession anchor pole, then the length of drilling rod back segment 7 is 1550mm,
Drilling tail 8 design length 100mm, the total length 2100mm of the drilling tool.
The drilling tool can be matched with current ZQS-65/2.5s air drills.The drilling speed 380r/ of ZQS-65/2.5s air drills
Min, torque 65Nm, weight 13kg.Also it can be matched with current 1.2kw electric coal drills.1.2kw electric coal drill parameters are as follows：It bores
Fast 520r/min, torque 22Nm, weight 15kg.When installing anchor pole, speed changer is installed additional on drilling machine according to current method,
Slow down by 4 times of speeds, torque can be made to amplify 4 times, due to being screwed into distance 450mm, bores and move all number=450/48 (screw pitch)=9.4,
I.e. anchor pole, which turns 9.4 circles, can be screwed into leading portion drilling B.Existing drilling machine drilling speed n=380r/min, makes anchor pole rotating speed 380/4 after deceleration
=95r/min, i.e. 1.5r/s, thus it is required be screwed into time t=9.4*1.5=14 second, i.e. 14 seconds self tappings screw into leading portion brill
In the A of hole.
Claims (2)
1. a kind of end anchoring process of self tapping precession anchor pole, which is characterized in that drill out one in needing the tunnel anchored first
The drilling of front and back section different-diameter, it is desirable that the bore diameter of leading portion should be equal to the minor diameter d of self tapping precession anchor pole, the drilling of back segment
Diameter should be greater than the major diameter D of self tapping precession anchor pole, and the length of leading portion slim hole should meet anchor rod anchored section of self tapping precession
Design length；Then self tapping precession anchor pole is inserted into drilling, until inserted at the reducing of arrival minor diameter it is motionless until, then use
Drilling machine is the rotary force that self tapping precession anchor pole applies enough torques, and self tapping precession anchor pole is made to screw into leading portion slim hole,
Pallet is installed outside hole and tightens nut, reaches the pretightning force of design, construction finishes.
2. it is a kind of to implement self tapping precession anchor pole described in claim 1 end anchoring process Hole drilling set, it include by
The drilling tool body that drill bit, drilling rod and drilling tail are constituted, which is characterized in that the drilling rod is that slightly two different bars are straight for the thin back segment of leading portion
Diameter, and front and back two sections of front end is respectively equipped with the drill bit of different-diameter；Wherein, the size of preceding bit diameter, should ensure that and bored
The aperture gone out is equal to the minor diameter d of self tapping precession anchor pole, and rear bit diameter size should ensure that drilled out aperture is more than or equal to certainly
The major diameter D of precession anchor pole is attacked, the length of leading portion drilling rod should meet the design length of anchor rod anchored section of self tapping precession；It is described from
The minor diameter d for attacking precession anchor pole refers to the diameter of self tapping precession spiral thread on anchor bolt tooth bottom section part, and major diameter D refers to self tapping precession anchor
The diameter of bar thread crest section part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810384554.4A CN108468559A (en) | 2018-04-28 | 2018-04-28 | The end anchoring process and mating Hole drilling set of self tapping precession anchor pole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810384554.4A CN108468559A (en) | 2018-04-28 | 2018-04-28 | The end anchoring process and mating Hole drilling set of self tapping precession anchor pole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108468559A true CN108468559A (en) | 2018-08-31 |
Family
ID=63263911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810384554.4A Pending CN108468559A (en) | 2018-04-28 | 2018-04-28 | The end anchoring process and mating Hole drilling set of self tapping precession anchor pole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108468559A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113266405A (en) * | 2021-06-01 | 2021-08-17 | 赵鹏 | Supporting method for roadway supporting anchoring agent-free threaded anchor rod |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5184922A (en) * | 1991-12-16 | 1993-02-09 | Russell Blackwell | Roof bolt anchor |
| CN101749041A (en) * | 2009-12-21 | 2010-06-23 | 惠兴田 | Dual-anchoring rod and construction method thereof |
| CN208236329U (en) * | 2018-04-28 | 2018-12-14 | 青岛达邦钻机有限责任公司 | The Hole drilling set of self tapping precession anchor pole end anchor structure |
-
2018
- 2018-04-28 CN CN201810384554.4A patent/CN108468559A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5184922A (en) * | 1991-12-16 | 1993-02-09 | Russell Blackwell | Roof bolt anchor |
| CN101749041A (en) * | 2009-12-21 | 2010-06-23 | 惠兴田 | Dual-anchoring rod and construction method thereof |
| CN208236329U (en) * | 2018-04-28 | 2018-12-14 | 青岛达邦钻机有限责任公司 | The Hole drilling set of self tapping precession anchor pole end anchor structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113266405A (en) * | 2021-06-01 | 2021-08-17 | 赵鹏 | Supporting method for roadway supporting anchoring agent-free threaded anchor rod |
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