CN208686315U - A kind of drill bit for fast drilling in detecting earth stress - Google Patents
A kind of drill bit for fast drilling in detecting earth stress Download PDFInfo
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- CN208686315U CN208686315U CN201820562017.XU CN201820562017U CN208686315U CN 208686315 U CN208686315 U CN 208686315U CN 201820562017 U CN201820562017 U CN 201820562017U CN 208686315 U CN208686315 U CN 208686315U
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Abstract
This application discloses a kind of drill bits for fast drilling in detecting earth stress.Drill bit includes: the first corer, and one end can removably be connect with big drill, and outer diameter is slightly less than the outer diameter of the big drill；Taper bit, the outer diameter of first end is identical as the outer diameter of the big drill, and the taper bit is removably connect with first corer；Second corer, first end are connect with the second end of the taper bit, and outer diameter is slightly less than the outer diameter of the taper bit second end；Coring bit is connect with the second end of second corer, and outer diameter is identical as the outer diameter of the taper bit second end；Water passage equipped with the first corer and second corer described in connection in the taper bit.Mounting hole construction efficiency and success of the test rate, engineering application value with higher can be improved in the drill bit.
Description
Technical field
The present disclosure relates generally to the underground engineerings stress survey technology such as ground, mining fields, and in particular to one kind is for ground
The drill bit of fast drilling in stress test.
Background technique
The underground engineerings such as China's a batch major motor vehicle, water power, oil gas, mining are planned in succession and are built at present.West area
More deep mountain valleys, tectonic movement is strong, and seismic activity takes place frequently, and crustal stress level is higher.In the process of construction of engineering, crustal stress
Level directly affects the design and construction scheme of engineering.Therefore, accurate survey engineering place crustal stress level is that above-mentioned engineering is built
If required content in the process.
Currently, hollow inclusion stress relief by borehole overcoring technique is one of measurement most common method of the underground engineering stress of primary rock.It should
Method has main steps that: brill macropore-polishes installation Tubular Yarn-releasing in big bottom hole-brill bellmouth-brill aperture-aperture and contains
Backpack body core-data processing simultaneously calculates crustal stress.From the above process as can be seen that after macropore is constructed to target location,
The detailed process of conventional method construction aperture are as follows: installation, which polishes drill bit-installation and pushes drilling rod-, polishes big bottom hole-dismounting drilling rod-
Installation taper bit-installation simultaneously pushes drilling rod-construction bellmouth-dismounting drilling rod-installation aperture drill bit-installation and pushes drilling rod-
Construction aperture-dismounting drilling rod.Above process drilling rod need to pass in and out 6 times, and speed of application is very slow.Open file [CN 106121544
A] method detailed process are as follows: installation taper thread grinding is bit Integrated-install and push drilling rod-and polish big bottom hole and bellmouth-of constructing
Dismounting drilling rod-installation aperture drill bit-installation simultaneously pushes drilling rod-construction aperture-dismounting drilling rod.Above process drilling rod need to pass in and out 4 times,
Speed of application is slower.
Utility model content
In view of drawbacks described above in the prior art or deficiency, it is intended to provide a kind of for fast drilling in detecting earth stress
Technical solution.
In a first aspect, the embodiment of the present application provides a kind of drill bit for fast drilling in detecting earth stress, comprising:
First corer, one end can removably be connect with big drill, and outer diameter is slightly less than the big drill
Outer diameter；
Taper bit, the outer diameter of first end is identical as the outer diameter of the big drill, the taper bit and described the
One corer removably connects；
Second corer, first end are connect with the second end of the taper bit, and outer diameter is slightly less than the tapered bur
The outer diameter of head second end；
Coring bit is connect with the second end of second corer, and outer diameter is outer with the taper bit second end
Diameter is identical；
Water passage equipped with the first corer and second corer described in connection in the taper bit.
The outer diameter of second corer is 2-6mm smaller than the outer diameter of the coring bit, can protect aperture core barrel, prevents
Only aperture core barrel and palisades friction, to guarantee the placed in the middle of aperture.
The wall thickness of second corer is 6.5-8.0mm, can satisfy rigidity requirement, and is able to satisfy " center in specification
Instrument connection should be coaxial with releasing hole, and two hole hole axle tolerances should not exceed the requirement of 2mm ".
The angle of the tapered surface of the taper bit and the first corer axis is 30-60 °.
The coring bit uses diamond bit or polycrystalline diamond compact bit.
The conical outer surface of the taper bit is electroplated diamond.
A method of for fast drilling in detecting earth stress, comprising the following steps:
Macropore is crept into set depth by the drilling machine with big drill；
The big drill that the first coring tube end will be set to is removed, and installs coring bit, the coring bit with it is described
Taper bit and the second corer, the outer diameter of the taper bit first end and the big drill are equipped between big drill
Outer diameter is identical, and the outer diameter of the taper bit second end is identical as the outer diameter of the coring bit, outside second corer
Diameter is 2-6mm smaller than the outer diameter of the coring bit；
Aperture drilling is carried out using the drilling machine with the coring bit, drilling depth meets the described of the taper bit
First end is deeper than the set depth of the macropore, and forms the bellmouth and aperture of smooth transition in the end of the macropore.
The angle of the tapered surface of the taper bit and the first corer axis is 30-60 °.
The drilling depth meets set depth depth 1-2cm of the first end than the macropore of the taper bit.
After forming the bellmouth and aperture, the aperture is cleaned by water passage, exits drilling rod.
Drill bit and construction method provided by the embodiments of the present application for fast drilling in detecting earth stress, taper therein
It drill bit and is directly connected to by the second corer and coring bit, can once complete the construction of bellmouth and aperture, simplify construction
Process substantially increases the construction efficiency of drilling；The outer diameter of second corer is more smaller than the outer diameter of coring bit, can protect
Two corers prevent the second corer and palisades friction, and can guarantee essentially concentric between the macropore and aperture drilled through, Ke Yiman
Requirement of the foot specification to aperture centering effect；The both ends of the taper bit outer diameter phase with the first corer and the second corer respectively
Together, make the no platform of the drilling constructed out, between bellmouth and macropore, aperture realize smooth transition, it can be ensured that backpack body smoothly into
Enter aperture, so that the success rate of test greatly improved.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1 is bellmouth and the bit Integrated schematic diagram of aperture in the embodiment of the present application；
The drilling schematic diagram that Fig. 2 the embodiment of the present application is constructed out；
Fig. 3 is the drilling schematic diagram that conventional method is constructed out；
Wherein, 1, taper bit；2, aperture core barrel；3, aperture drill bit；4, macropore core barrel；5, inner hole；7, aperture；8,
Bellmouth；9, guide rod；10, macropore；11, Tubular Yarn；12, big bottom hole platform.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical solutions in the embodiments of the present invention are clearly and completely described.Obviously, it is retouched
The embodiment stated be the utility model a part instead of all the embodiments.For ease of description, illustrated only in attached drawing with
The relevant part of utility model.
It should be noted that in the absence of conflict, the utility model for usually describing and showing in this figure is real
The component for applying example can be arranged and be designed with a variety of different configurations.It is understood that specific implementation described herein
Example is used only for explaining relevant utility model, rather than the restriction to the utility model.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, belonging to and " setting
Set ", " connection " should broadly understood, for example, it may be being fixedly connected, may be a detachable connection, or one connection；It can
To be mechanical connection, it is also possible to be electrically connected；It can be and be directly connected to, can also be indirectly connected with, be can be by intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in utility model.
As mentioned in the background art, in the prior art hollow inclusion stress relief by borehole overcoring technique have it is cumbersome, time-consuming
The disadvantages of longer.
On the other hand, in " Standard for test methods of engineering rock masses ", there is following requirement: " 2 application set brill releasing drill bits are drilled into pre-
Fixed test depth, and removal of core is answered, it is described.3 applications polish bit grinding flat hole bottom, and apply taper bit typhon
Mouthful.4 application small-bore drill bits bore center instrument connection ... center instrument connection should be coaxial with releasing hole, and two hole hole axle tolerances are not
It should be greater than 2mm." according to above-mentioned regulation in the actual construction process, due to diameter macropores be greater than tapered hole diameter, the meeting of macropore bottom
There are platforms, as shown in Figure 3.In backpack body installation process, when backpack body centering effect is bad or 9 front end of backpack body guide rod is longer
When, guide rod 9, which may touch big bottom hole platform 12, causes colloid to flow out, and eventually leads to test failure.
In view of the drawbacks described above of the prior art, the embodiment of the present application provide a kind of bellmouth for detecting earth stress with
Aperture is bit Integrated, and mounting hole construction efficiency and success of the test rate, engineer application valence with higher can be improved in the drill bit
Value.As shown in Figure 1, drill bit includes aperture drill bit 3, aperture core barrel 2, taper bit 1.3 outer diameter of aperture drill bit is 38mm, in
Surface is equipped with screw thread, and 2 outer diameter of aperture core barrel is 36mm, and long 40cm, both ends outer surface is equipped with screw thread, 1 both ends of taper bit
Inner surface is equipped with screw thread.Aperture drill bit 3 is connected through a screw thread with aperture core barrel 2；Aperture core barrel 2 passes through with taper bit 1
It is threadedly coupled, taper bit 1 is with macropore core barrel 4 using being threadedly coupled, and wherein the outer diameter of macropore core barrel 4 is 128mm.Cone
Shape drill bit 1 is hollow taper structure, and inner hole 5 is cooling-water duct, and conical outer surface is electroplated diamond, in outer surface and drill bit
Heart line is at 30 degree of angles.1 one end outer diameter of taper bit is identical as big drill, is 130mm, other end outer diameter and aperture core
Pipe 2 is identical, is 38mm.The angle 30-60 degree of tapered surface and basket axis.Taper bit 1 and aperture drill bit 3 are diamond
Drill bit or composite polycrystal-diamond, aperture drill bit 3 are coring bit.
Using the drill bit in drilling process, flow of cooling water direction are as follows: drilling rod → macropore core barrel → taper bit →
Aperture core barrel → aperture drill bit → aperture → bellmouth → macropore.
Using the utility model construct aperture the step of it is as follows: installation bellmouth and aperture be bit Integrated-install and push away
Send drilling rod-construction bellmouth 8 and aperture 7- dismounting drilling rod.Above process drilling rod need to only pass in and out 2 times, and speed of application greatly improves.
Below Specific construction process with the bit Integrated construction detecting earth stress drilling of bellmouth and aperture:
Step 1: installing and fixing drilling machine, the aperture elevation angle takes 20 degree, and measures azimuth.
Step 2: using the big drill construction macropore 10 of outer diameter 130mm, when macropore 10 is as deep as target depth 15m is arrived,
Drilling rod is exited, and removes big drill.
Step 3: installation bellmouth and aperture are bit Integrated, constantly install and push drilling rod to big bottom hole；Then, constantly
Aperture and bellmouth are drilled through forward, when 1 rear end of taper bit reaches the position depth 15m, are continued the 1-2cm that drills forward, are guaranteed
Bellmouth is smoothly connected with macropore realization；To once complete the construction of bellmouth and aperture.
Step 4: reducing drilling rod thrust and drilling rod is moved back into 5-10mm later；Aperture is cleaned with clear water, is then log out drilling rod, is torn open
Except bellmouth is bit Integrated with aperture.
Step 5: after aperture is completely dried, Tubular Yarn 11 being installed.
Step 6: after colloid is fully cured, big drill being installed, aperture and backpack body are released together.
Step 7: measuring the elasticity modulus and Poisson's ratio of core, and calculate crustal stress size and direction.
From above-mentioned steps as can be seen that the present embodiment it is a technical advantage that:
1, compared with prior art, the present embodiment can once complete the construction of bellmouth and aperture, simplify working procedure,
Substantially increase the construction efficiency of drilling.
2, as shown in figure 3, in the drilling constructed out using the prior art, since existing taper bit is by plane and conical surface group
At, it will appear platform 10 in macropore bottom, during Tubular Yarn 11 pushes, when backpack body centering effect is bad, guide rod 9
The platform 10 that macropore bottom may be touched causes colloid to squeeze out and test failure.Compared with prior art pore-forming, the present embodiment is applied
The drilling that work goes out realizes smooth transition as shown in Fig. 2, the drilling constructed out no platform between bellmouth and macropore, aperture, can
Ensure that backpack body can smoothly enter into aperture, so that the success rate of test greatly improved.
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art
Member is it should be appreciated that utility model range involved in the application, however it is not limited to made of the specific combination of above-mentioned technical characteristic
Technical solution, at the same should also cover do not depart from the utility model design in the case where, by above-mentioned technical characteristic or its be equal
Feature carries out any combination and other technical solutions for being formed.Such as features described above and (but being not limited to) disclosed herein have
The technical solution for thering is the technical characteristic of similar functions to be replaced mutually and being formed.
Claims (6)
1. a kind of drill bit for fast drilling in detecting earth stress characterized by comprising
First corer, one end can removably be connect with big drill, and outer diameter is slightly less than the outer diameter of the big drill；
Taper bit, the outer diameter of first end is identical as the outer diameter of the big drill, and the taper bit takes with described first
Core pipe removably connects；
Second corer, first end are connect with the second end of the taper bit, and outer diameter is slightly less than the taper bit
The outer diameter at two ends；
Coring bit is connect with the second end of second corer, the outer diameter phase of outer diameter and the taper bit second end
Together；
Water passage equipped with the first corer and second corer described in connection in the taper bit.
2. the drill bit according to claim 1 for fast drilling in detecting earth stress, it is characterised in that: described second takes
The outer diameter of core pipe is 2-6mm smaller than the outer diameter of the coring bit.
3. the drill bit according to claim 1 for fast drilling in detecting earth stress, it is characterised in that: described second takes
The wall thickness of core pipe is 6.5-8.0mm.
4. the drill bit according to claim 1 for fast drilling in detecting earth stress, it is characterised in that: the tapered bur
The tapered surface of head and the angle of the first corer axis are 30-60 °.
5. the drill bit according to claim 1 for fast drilling in detecting earth stress, it is characterised in that: the core drill
Head uses diamond bit or polycrystalline diamond compact bit.
6. the drill bit according to claim 1 for fast drilling in detecting earth stress, it is characterised in that: the tapered bur
The conical outer surface of head is electroplated diamond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820562017.XU CN208686315U (en) | 2018-04-19 | 2018-04-19 | A kind of drill bit for fast drilling in detecting earth stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820562017.XU CN208686315U (en) | 2018-04-19 | 2018-04-19 | A kind of drill bit for fast drilling in detecting earth stress |
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| Publication Number | Publication Date |
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| CN208686315U true CN208686315U (en) | 2019-04-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108397138A (en) * | 2018-04-19 | 2018-08-14 | 中国科学院武汉岩土力学研究所 | A kind of drill bit and method for fast drilling in detecting earth stress |
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2018
- 2018-04-19 CN CN201820562017.XU patent/CN208686315U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108397138A (en) * | 2018-04-19 | 2018-08-14 | 中国科学院武汉岩土力学研究所 | A kind of drill bit and method for fast drilling in detecting earth stress |
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