CN215292335U - Drilling device for improving stress relief method - Google Patents
Drilling device for improving stress relief method Download PDFInfo
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- CN215292335U CN215292335U CN202120917555.8U CN202120917555U CN215292335U CN 215292335 U CN215292335 U CN 215292335U CN 202120917555 U CN202120917555 U CN 202120917555U CN 215292335 U CN215292335 U CN 215292335U
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- 238000005553 drilling Methods 0.000 title claims abstract description 122
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000002184 metal Substances 0.000 claims abstract description 82
- 230000005540 biological transmission Effects 0.000 claims abstract description 45
- 239000011435 rock Substances 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 230000003068 static effect Effects 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 10
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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Abstract
The utility model discloses an improve device that creeps into of stress relief method belongs to the crustal stress measurement field. The drilling tool comprises a drilling tool outer pipe and a strain sensor arranged at the circle center of the bottom of a drill hole, wherein the drilling tool inner pipe is arranged in the drilling tool outer pipe, a transmission pipe connected with the drilling tool is further arranged between the drilling tool outer pipe and the drilling tool inner pipe, a connecting device is arranged between the outer side of the transmission pipe and the inner side of the drilling tool outer pipe, and a centering device is arranged between the inner side of the transmission pipe and the drilling tool inner pipe; the drilling structure composed of the outer pipe of the drilling tool and the inner pipe of the drilling tool is simple in structure, economical, reliable and convenient to operate, the connecting device comprises a rotatable bolt and a metal locking device, and the centering device comprises a universal ball arranged between the outer side of the inner pipe of the drilling tool and the inner side of the transmission pipe.
Description
Technical Field
The utility model relates to a creep into the device, be particularly useful for the device that creeps into of improvement stress relief method that ground stress measurement field used.
Background
The ground stress is the most basic original data of the mechanical state of the crust stratum, and is a necessary precondition for determining the mechanical property of the rock mass, analyzing the stability of the surrounding rock and realizing the excavation design and scientific decision of a roadway (tunnel). To understand the ground stress state of a region, the most straightforward and effective method is to perform in-situ ground stress measurements.
Stress relief methods are currently the main methods for measuring crustal stress, and there are two main types: the hole bottom stress relieving method and the trepanning stress relieving method have relatively simple principles, and only one drilling hole is needed to be drilled, the strain gauge is installed at the hole bottom, and then a large drilling hole is extended; in the trepanning stress relief method, a large drill hole is drilled to a preset depth of the stress to be measured, a small concentric drill hole is drilled forwards, a triaxial strain gauge or an aperture deformation sensor is installed in the small drill hole, and finally the large drill hole is extended to separate the cylindrical core from the bedrock so as to achieve the stress relief state. In combination with the principle of stress relief, the existing drilling device or method of stress relief method, such as CN212774258U, has a guiding function by arranging tripods carrying rollers on the drill rod at intervals, such as CN105507876A, which provides a drilling device consisting of a relief drilling bit component, a release control component, and a measurement drilling bit component, but these existing drilling devices still have some problems, such as too complicated structure, time and labor consuming operation in the actual application process, or needing to continuously replace and withdraw the drilling tool in the drilling process, large disturbance to the drilling hole, easy hole collapse, difficult control of the position orientation of the drilling hole, and great influence on the stress test in the later stage. Therefore, the drilling device of the existing stress relief method needs to be improved aiming at the two aspects of the stability of the drilled rock mass and the accurate directional drilling of the measuring hole.
SUMMERY OF THE UTILITY MODEL
The technical purpose is as follows: aiming at the defects of the technology, the drilling device for improving the stress relief method is provided, which can improve the ground stress measurement by the stress relief method, and obviously improves the stability of the rock mass to be drilled and the accuracy of the position of the measurement hole by utilizing double-pipe single-action drilling of the outer pipe of the drilling tool and the inner pipe of the drilling tool and the concentric centering and orienting device of the universal ball.
The technical content is as follows: in order to achieve the technical purpose, the drilling device for improving the stress relieving method comprises an outer drilling tool pipe 1 and a transmission pipe 5 arranged at the center of a circle at the bottom of a drill hole, wherein the inner drilling tool pipe 2 is arranged inside the outer drilling tool pipe 1, the transmission pipe 5 connected with a drilling machine 8 is also arranged between the outer drilling tool pipe 1 and the inner drilling tool pipe 2, a plurality of connecting devices are arranged between the outer side of the transmission pipe 5 and the inner side of the outer drilling tool pipe 1, and a plurality of centering devices are arranged between the inner side of the transmission pipe 5 and the inner drilling tool pipe 2;
the connecting device comprises a metal locker which is contacted with the outer side of the transmission pipe through a rotatable bolt, the metal locker is movably connected with the rotatable bolt, and the rotatable bolt is rotated to adjust the stress applied to the outer side of the transmission pipe by the metal locker and ensure that the transmission pipe is adjusted to be positioned at the center of the outer pipe of the drilling tool;
the connecting device comprises a metal locking device which is contacted with the outer side of the transmission pipe through a rotatable bolt, the metal locking device is movably connected with the rotatable bolt, and the stress applied to the outer side of the transmission pipe by the metal locking device is adjusted by rotating the rotatable bolt;
the centering device comprises a plurality of universal balls arranged between the outer side of the inner pipe of the drilling tool and the inner side of the transmission pipe at intervals, and the universal balls are always kept in the center of the transmission pipe when the inner pipe of the drilling tool moves.
The metal locking device is an arc-shaped metal sheet, two pairs of threaded holes are formed in the outer side of the outer pipe of the drilling tool and matched with the type of the rotatable bolt, and a large number of ridge lines are arranged on the contact surfaces of the inner side of the metal locking device and the outer side of the transmission pipe; the metal locking device and the outer side of the metal locking device are provided with T-shaped metal round rods, the T-shaped metal round rods are connected with the cavity on the inner side of the end part of the rotatable bolt rod body, so that the rotatable bolt freely rotates relative to the metal locking device in a static state, the number of rotating circles of the rotating bolt arranged oppositely is consistent, and the adjusted transmission pipe is centered in the outer pipe of the drilling tool.
The metal locking device is an arc-shaped metal sheet, two pairs of threaded holes are formed in the outer side of the outer pipe of the drilling tool and matched with the type of the rotatable bolt, and a large number of ridge lines are arranged on the contact surfaces of the inner side of the metal locking device and the outer side of the transmission pipe; the metal locking device and the outer side of the metal locking device are provided with T-shaped metal round rods, and the T-shaped metal round rods are connected with the cavity on the inner side of the end part of the rotatable bolt rod body, so that the rotatable bolt can freely rotate relative to the metal locking device in a static state.
The universal ball comprises a metal ball, small steel balls, a base, a metal shell, a spring and a sealing ring, wherein the base is arranged in the metal shell, the spring is arranged at the bottom of the base and the bottom of the metal shell, a groove for accommodating the metal ball is arranged in the base, a plurality of small steel balls are arranged in a gap surrounding the metal ball in the groove, and the sealing ring for fixing the metal ball to be placed and dropped is arranged at the top of the base; when the metal ball is extruded by the inner pipe wall of the transmission pipe, the base compression spring generates a proper amount of deformation, and meanwhile, the universal ball is tightly attached to the pipe wall of the transmission pipe.
The universal ball welding on the metal ring, 3 universal balls have evenly been arranged to the equal contained angle on a metal ring, the contained angle between two liang is 120, the metal ring on be provided with the screw hole, use the bolt to fix the metal ring on the drilling tool inner tube, the drilling tool inner tube on arranged a plurality of concentric structure placed in the middle of constituteing by universal ball and metal ring.
Has the advantages that: the utility model discloses a double-barrelled single action drilling structure that drilling tool outer tube and drilling tool inner tube are constituteed, when the construction basic hole, use the torque transmission structure that transmission pipe, rotatable bolt and metal locking ware are constituteed to transmit the moment of torsion of rig to the drilling tool outer tube, and then the cutting rock forms the basic hole, when the construction survey hole, the drilling tool outer tube still is in the basic hole, has stopped basic hole rock mass breakage and has received the possibility of collapsing hole of vibrations, has improved the stability of drilling; and through adjusting the rotation angle of rotatable bolt at the drilling tool outer tube, can adjust the position of driving pipe accurately, make it be in the center of drilling tool outer tube, and then when the construction measuring hole, can guarantee to install the drilling tool inner tube of the concentric structure placed in the middle that comprises universal ball and metal loop and be in the center of basic hole to make measuring hole and basic hole be in same center, improved the precision of stress relief method geodesic stress.
To sum up, improve the device that creeps into of stress relief method, not only effectively prevented among the crustal stress measurement process drilling collapse destruction, improved the precision of stress relief method geodesic stress, be favorable to having simple structure, economic advantage reliable and simple operation.
Drawings
FIG. 1(a) is a schematic diagram of a construction foundation hole of a drilling device for improving a stress relief method according to the present invention;
FIG. 1(b) is a schematic view of the drilling device for improving the stress relief method according to the present invention, which uses the inner tube of the drilling tool to construct the measuring hole;
FIG. 1(c) is a schematic view of a drilling device with a variable sensor for improving the stress relief method of the present invention;
FIG. 1(d) is a schematic diagram of the drilling apparatus for improved stress relief of the present invention for drilling a core;
fig. 2 is a schematic cross-sectional view of the rotatable bolt and metal locking device of the present invention;
fig. 3 is a schematic view of the internal structure of the universal ball of the present invention.
In the figure: 1-drilling tool outer pipe; 2-drilling tool inner tube; 3-a rotatable bolt; 4-a metal detent; 5-a transmission pipe; 6-universal ball; 7-a metal ring; 8-a drilling machine; 9-a basal pore; 10-measuring holes; 11-a strain sensor; 12-a core; 61-metal balls; 62-small steel balls; 63-a base; a 64 metal housing; 65-a spring; 66-sealing ring.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1(a) -fig. 1(d), the utility model discloses a kind of improve drilling device of stress relief method, including drilling tool outer tube 1 and the strain sensor 11 of setting in the bottom of a bore hole centre of a circle department, drilling tool outer tube 1 cuts the country rock and forms basic hole 9, and drilling tool inner tube 2 continues to cut the country rock and form measuring hole 10 at the hole bottom of basic hole 9 on the basis of basic hole 9, strain sensor 11 sets up in measuring hole 10. A drilling tool inner pipe 2 is arranged inside the drilling tool outer pipe 1, a transmission pipe 5 connected with a drilling tool 8 is further arranged between the drilling tool outer pipe 1 and the drilling tool inner pipe 2, a plurality of connecting devices are arranged between the outer side of the transmission pipe 5 and the inner side of the drilling tool outer pipe 1, and a plurality of centering devices are arranged between the inner side of the transmission pipe 5 and the drilling tool inner pipe 2;
as shown in fig. 2, the connecting device comprises a metal locker 4 contacted with the outer side of the transmission pipe 5 through a rotatable bolt 3, the metal locker 4 is movably connected with the rotatable bolt 3, and the stress applied to the outer side of the transmission pipe 5 by the metal locker 4 is adjusted by rotating the rotatable bolt 3; the metal locking device 4 is an arc-shaped metal sheet, two pairs of threaded holes are formed in the outer side of the outer pipe 1 of the drilling tool and matched with the type of the rotatable bolt 3, and a large number of ridge lines are formed in the contact surfaces of the inner side of the metal locking device 4 and the outer side of the transmission pipe 5; the metal locking device 4 and the outer side are provided with T-shaped metal round rods, the T-shaped metal round rods are connected with cavities on the inner sides of the rod bodies of the rotatable bolts 3, so that the rotatable bolts 3 can freely rotate relative to the metal locking device 4 in a static state, and the rotating circles of the rotatable bolts 3 which are arranged oppositely are consistent, so that the adjusted transmission pipe 5 is ensured to be centered in the outer pipe 1 of the drilling tool;
as shown in fig. 3, the centering device comprises a plurality of universal balls 6 which are arranged between the outer side of the inner pipe 2 of the drilling tool and the inner side of the transmission pipe 5 at intervals, and the universal balls 6 are used for keeping the inner pipe 2 of the drilling tool in the centering position of the transmission pipe 5 all the time when the inner pipe 2 of the drilling tool moves; the universal ball 6 comprises a metal ball 61, small steel balls 62, a base 63, a metal shell 64, a spring 65 and a sealing ring 66, wherein the base 63 is arranged in the metal shell 64, the spring 65 is arranged at the bottom of the base 63 and the bottom of the metal shell 64, a groove for accommodating the metal ball 61 is arranged in the base 63, a plurality of small steel balls 62 are arranged in a gap surrounding the metal ball 61 in the groove, and the sealing ring 66 for fixing the metal ball 61 to be placed and dropped is arranged at the top of the base 63; when the metal balls 61 are pressed by the inner wall of the transmission pipe 5, the base 63 compresses the spring 65 to deform a proper amount, and the universal ball 6 is tightly attached to the inner wall of the transmission pipe 5. Universal ball 6 welding is on ferrule 7, 3 universal balls 6 have evenly been arranged to the equal contained angle of a ferrule 7, and the contained angle is 120 between two liang, ferrule 7 on be provided with the screw hole, use the bolt to fix ferrule 7 on drilling tool inner tube 2, drilling tool inner tube 2 on arranged a plurality of concentric structures placed in the middle of forming by universal ball 6 and ferrule 7.
The working process is as follows: applying the drilling device for improving the stress relieving method to measure the ground stress, comprising the following steps:
as shown in fig. 1(a), a driving pipe 5 is sleeved into the outer pipe 1 of the drilling tool, the rotatable bolts 3 symmetrically arranged on the outer pipe 1 of the drilling tool are adjusted in a rotating way, the driving pipe 5 is fixed by pressing a metal locking device 4, and the driving pipe 5 and the outer pipe 1 of the drilling tool are kept concentric. Connecting the transmission pipe 5 with a drilling machine 8 and constructing a basic hole 9;
as shown in fig. 1(b), after the foundation hole 9 is finished, disconnecting the driving pipe 5 from the drilling machine 8, penetrating a plurality of groups of metal rings 7 welded with universal balls 6 through the inner pipe 2 of the drilling machine, fixing the metal rings by using bolts, penetrating the inner pipe 2 of the drilling machine provided with the concentric centering structure through the driving pipe 5 into the foundation hole 1, connecting the inner pipe with the drilling machine 8, and forming a measuring hole 10;
as shown in fig. 1(c), after the measurement hole 10 is completed, the inner pipe 2 of the drilling tool is disconnected from the drilling machine 8 and is pulled out from the transmission pipe 5, the strain sensor 11 is placed in the measurement hole 10 by using a long rod, and data is read;
as shown in fig. 1(d), the driving pipe 5 is connected with the drilling machine 8 again, the basic hole 9 is extended, the length of the extended footage is consistent with that of the measuring hole 10, the core 12 comprising the strain sensor 11 is drilled, the outer pipe 1 of the drilling machine is retreated to the position of the original basic hole 9, stress relief is implemented, and data of the strain sensor 11 is read, so that the ground stress measurement is completed.
Claims (5)
1. A drilling apparatus for improving a method of stress relief, comprising: the drilling tool comprises a drilling tool outer pipe (1) and a drilling tool inner pipe (2) arranged at the center of a circle at the bottom of a drill hole, wherein a driving pipe (5) connected with a drilling machine (8) is arranged between the drilling tool outer pipe (1) and the drilling tool inner pipe (2), a plurality of connecting devices are arranged between the outer side of the driving pipe (5) and the inner side of the drilling tool outer pipe (1), and a plurality of centering devices are arranged between the inner side of the driving pipe (5) and the drilling tool inner pipe (2);
the connecting device comprises a metal locker (4) which is in contact with the outer side of the transmission pipe (5) through a rotatable bolt (3), the metal locker (4) is movably connected with the rotatable bolt (3), and the rotatable bolt (3) is rotated so as to adjust the stress applied to the outer side of the transmission pipe (5) by the metal locker (4) and ensure that the transmission pipe (5) is adjusted to be positioned at the central position of the outer pipe (1) of the drilling tool;
the centering device comprises a plurality of universal balls (6) which are arranged between the outer side of the inner pipe (2) of the drilling tool and the inner side of the transmission pipe (5) at intervals, and when the inner pipe (2) of the drilling tool moves, the inner pipe of the drilling tool is always positioned in the center of the transmission pipe (5) through the universal balls (6).
2. The drilling apparatus for improved stress relief as set forth in claim 1, wherein: the outer pipe (1) of the drilling tool cuts surrounding rocks to form a basic hole (9), the inner pipe (2) of the drilling tool continuously cuts the surrounding rocks at the bottom of the basic hole (9) on the basis of the basic hole (9) to form a measuring hole (10), and the strain sensor (11) is arranged in the measuring hole (10).
3. The drilling apparatus for improved stress relief as set forth in claim 1, wherein: the metal locking device (4) is an arc-shaped metal sheet, two pairs of threaded holes are formed in the outer side of the outer pipe (1) of the drilling tool and matched with the type of the rotatable bolt (3), and a large number of ridge lines are formed in the contact surfaces of the inner side of the metal locking device (4) and the outer side of the transmission pipe (5); the metal locking device (4) and the outer side are provided with a T-shaped metal round rod, the T-shaped metal round rod is connected with a cavity on the inner side of the end part of the rod body of the rotatable bolt (3), the rotatable bolt (3) can rotate freely relative to the metal locking device (4) in a static state, and the number of rotating circles of the rotatable bolt (3) which is arranged oppositely is consistent, so that the adjusted transmission pipe (5) is centered in the outer pipe (1) of the drilling tool.
4. The drilling apparatus for improved stress relief as set forth in claim 1, wherein: the universal ball (6) comprises a metal ball (61), small steel balls (62), a base (63), a metal shell (64), a spring (65) and a sealing ring (66), wherein the base (63) is arranged in the metal shell (64), the spring (65) is arranged at the bottom of the base (63) and the bottom of the metal shell (64), a groove for accommodating the metal ball (61) is formed in the base (63), a plurality of small steel balls (62) are arranged in a gap surrounding the metal ball (61) in the groove, and the sealing ring (66) for fixing the metal ball (61) to be placed and dropped is arranged at the top of the base (63); when the metal ball (61) is extruded by the inner pipe wall of the transmission pipe (5), the base (63) compresses the spring (65) to generate a proper amount of deformation, and meanwhile, the universal ball (6) is enabled to be tightly attached to the pipe wall of the transmission pipe (5).
5. The drilling apparatus for improved stress relief as set forth in claim 4, wherein: universal ball (6) welding on ferrule (7), 3 universal balls (6) have evenly been arranged to the equal contained angle of a ferrule (7), the contained angle is 120 between two liang, ferrule (7) on be provided with the screw hole, use the bolt to fix ferrule (7) on drilling tool inner tube (2), drilling tool inner tube (2) on arranged a plurality of concentric structure placed in the middle of constituteing by universal ball (6) and ferrule (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120917555.8U CN215292335U (en) | 2021-04-29 | 2021-04-29 | Drilling device for improving stress relief method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120917555.8U CN215292335U (en) | 2021-04-29 | 2021-04-29 | Drilling device for improving stress relief method |
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| Publication Number | Publication Date |
|---|---|
| CN215292335U true CN215292335U (en) | 2021-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120917555.8U Active CN215292335U (en) | 2021-04-29 | 2021-04-29 | Drilling device for improving stress relief method |
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| CN (1) | CN215292335U (en) |
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2021
- 2021-04-29 CN CN202120917555.8U patent/CN215292335U/en active Active
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