CN117782382A - Hollow inclusion stress meter capable of accurately sensing whole installation process and use method - Google Patents
Hollow inclusion stress meter capable of accurately sensing whole installation process and use method Download PDFInfo
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- CN117782382A CN117782382A CN202311814815.9A CN202311814815A CN117782382A CN 117782382 A CN117782382 A CN 117782382A CN 202311814815 A CN202311814815 A CN 202311814815A CN 117782382 A CN117782382 A CN 117782382A
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- epoxy resin
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000011900 installation process Methods 0.000 title claims description 11
- 238000005553 drilling Methods 0.000 claims abstract description 82
- 239000003822 epoxy resin Substances 0.000 claims abstract description 45
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 45
- 239000011435 rock Substances 0.000 claims abstract description 22
- 238000012360 testing method Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 19
- 239000000853 adhesive Substances 0.000 claims description 18
- 230000001070 adhesive effect Effects 0.000 claims description 16
- 238000013461 design Methods 0.000 claims description 6
- 238000011161 development Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 238000013459 approach Methods 0.000 claims description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 1
- 235000017491 Bambusa tulda Nutrition 0.000 claims 1
- 241001330002 Bambuseae Species 0.000 claims 1
- 239000004593 Epoxy Substances 0.000 claims 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 1
- 239000011425 bamboo Substances 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000008447 perception Effects 0.000 claims 1
- 229920000297 Rayon Polymers 0.000 abstract description 2
- 239000010408 film Substances 0.000 abstract 1
- 239000010409 thin film Substances 0.000 abstract 1
- 239000002893 slag Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 229920000715 Mucilage Polymers 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000009662 stress testing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The hollow inclusion stress meter comprises a guide head, a plunger body, an epoxy resin cylinder and a tail plug, wherein a high-definition camera with an illuminating lamp is arranged at the front part of the guide head, a thin film pressure sensor is arranged at the end part of an outer ring of an interface between the guide head and the plunger body, and a high-definition camera with the illuminating lamp is arranged on the side face of the tail plug. In the process of drilling large and small holes in a rock stratum according to test requirements and slowly feeding the hollow inclusion into the holes, whether the epoxy resin cylinder is close to the guide head or not can be confirmed through the film pressure sensor, namely, whether the hollow inclusion stress gauge is installed in place or not is avoided, and the hollow inclusion is extruded and damaged due to the fact that an operator continuously applies high pressure through the pushing rod in order to ensure that the epoxy resin cylinder is installed in place; and directly observing whether the viscose body is completely filled in the radial gap between the hollow inclusion stress gauge and the small borehole wall through a camera at the side surface of the tail plug. The device has the advantages of simple structure, convenient operation, and accurate guiding and positioning.
Description
Technical Field
The invention belongs to the technical field of ground stress detection, and particularly relates to a hollow inclusion stress meter capable of accurately sensing the whole installation process and a use method thereof.
Background
The hollow inclusion stress meter method is widely applied to the research of underground engineering such as mines, hydropower, tunnels and the like at present, and good effect is achieved. The hollow inclusion stress meter with the visual guiding and positioning function and the use method thereof disclosed by the application number 2021114113096 can accurately guide and smoothly feed into a small rock stratum drilling hole and judge the small rock stratum drilling hole environment, but the structure and the actual installation process of the hollow inclusion have the following defects that (1) the manufacturing cost is high, the structure of the hollow inclusion stress meter is relatively complex, the manufacturing difficulty is high, and the cost is high; (2) Whether the viscose body is completely filled with the radial gap between the hollow inclusion stress gauge and the small borehole wall can not be directly observed through a host screen. The filling of the radial gap with the adhesive is also one of the key factors for successful ground stress testing. The existing hollow inclusion stress meter only judges whether the adhesive body is completely filled in the radial gap between the hollow inclusion stress meter and the small borehole wall by the quantity of the injected adhesive, but the existing hollow inclusion stress meter is unreliable, for example, once the quality problem of the hollow inclusion stress meter, such as the damage of a sealing ring and the like, occurs, the adhesive body leaks outwards, the radial gap between the hollow inclusion stress meter and the small borehole wall is difficult to be completely filled, and the hollow inclusion stress meter needs to be replaced in time if the installation fails; (3) The use is inconvenient, and a special adhesive body injection procedure is required to be added: after the hollow inclusion stress meter is installed in place, the rubber body is inflated by the pedal inflator to gradually enter the radial gap until the rubber injection process is completed, so that the process is complicated. Therefore, the structure of the hollow inclusion stress meter is improved to improve the installation success rate of the hollow inclusion stress meter, and the hollow inclusion stress meter has important significance.
Disclosure of Invention
Technical problems: the invention aims to overcome the defects in the prior art, and provides the hollow inclusion stress meter which has a simple structure, is more convenient to use, can accurately position and clearly observe whether the adhesive body is completely filled with the radial gap between the hollow inclusion stress meter and the small borehole wall, and the use method thereof.
The technical scheme is as follows: the hollow inclusion stress meter capable of accurately sensing the whole installation process comprises a guide head provided with a high-definition camera, an epoxy resin barrel, a tail plug, a merging cable, a host machine and a front sealing ring and a rear sealing ring, wherein the camera of the high-definition camera is positioned at the center of the front part of the guide head, and a plurality of LED lamps are arranged around the camera; the guide head provided with the high-definition camera is a plunger type guide head, the head of the plunger type guide head is a conical cylinder, a guide head front inclined hole which passes through a cable and a guide head small hole which is communicated with the guide head front inclined hole are formed in the conical cylinder, the rear part of the guide head is a plunger body, the plunger body is inserted into one side of an epoxy resin cylinder, a plunger central hole is formed in the middle of the plunger body, a plunger small hole which is communicated with the guide head small hole and passes through the cable is formed in the plunger central hole side, a film pressure sensor is arranged on the outer circular end face of the interface of the plunger body and the guide head, and a guide head rear inclined hole which is communicated with a wire is formed in the plunger body; the tail plug is fixedly arranged in the other side of the epoxy resin cylinder, a tail plug central hole through which the cable is combined is formed in the middle of the tail plug, a side high-definition camera is arranged on the tail plug, and the side high-definition camera is connected with the combined cable through a side high-definition camera cable.
The free length of the two-in-one cable combined with the cables of the camera and the film pressure sensor in the epoxy resin cylinder is required to be more than 5cm longer than the total length of the inner hole of the epoxy resin cylinder, so that the plunger body of the guide head can be completely pulled out of the epoxy resin cylinder; and nylon jackets for preventing the cables from being broken are arranged outside the cables.
The side high-definition camera is located in the radial hole of the peripheral surface of the tail plug, and comprises a camera and LED lamps arranged side by side.
The use method of the hollow inclusion stress meter accurately perceived in the whole installation process comprises the steps of drilling a large drilling hole with the diameter of 130mm in a rock stratum according to the design length, and continuously drilling a small drilling hole with the diameter of 36mm inwards at the bottom of the large drilling hole according to the design depth; the method comprises the following steps:
a. the plunger body of the hollow inclusion stress gauge is pulled out, a sufficient amount of adhesive is injected into the epoxy resin cylinder, and then the plunger body of the guide head is placed in a set position of the epoxy resin cylinder;
b. the pushing rod and the hollow inclusion stress meter are connected into a whole by utilizing the tail plug pin, the hollow inclusion stress meter is pushed by the pushing rod to enter a large drilling hole drilled in a rock stratum, and when the hollow inclusion is close to the bottom of the large drilling hole, the position of a small drilling hole opening formed at the bottom of the large drilling hole is observed by a high-definition camera at the front part of the guide head;
c. if the relative positions of the guide head and the small drilling hole are deviated, the pushing direction of the pushing rod is adjusted to center the guide head and the small drilling hole, and then the hollow inclusion stress gauge is continuously pushed to slowly enter the small drilling hole; in the process of slowly entering the small drilling hole, observing the crack development condition of the inner wall of the small drilling hole through a high-definition camera at the front part of the guide head, and withdrawing the hollow inclusion stress gauge, replacing the position and re-drilling when the inner wall of the small drilling hole is excessively broken and the integrity of the inner wall of the small drilling hole cannot meet the requirement of the ground stress test;
d. if the requirements are met, the pushing rod continues to push, when the front end of the epoxy resin cylinder is close to the guide head and extrudes the film sensor, and the extrusion force reaches 10N, the host machine sounds and flashes along with lamplight, and the pushing rod stops to push, so that the epoxy resin cylinder reaches the target position;
e. observing whether the sealing of the sealing ring is tight or not through the lateral camera, whether the radial gap between the epoxy resin cylinder and the small drilling hole is full of the adhesive or not, and if all the requirements are met, finishing the pushing of the hollow inclusion stress meter, and successfully installing the hollow inclusion stress meter; if not, reinstalling is needed, and the steps are repeated.
In the forward pushing process of the pushing rod, the lateral camera of the hollow inclusion stress meter is always at the uppermost position.
The beneficial effects are that: by adopting the technical scheme, the invention reveals the underground rock stratum ground stress and distribution characteristics of the coal mine, provides a basis for setting and supporting the stope, and is most suitable for measuring the three-dimensional ground stress in the rock stratum. The high-definition camera at the forefront part of the guide head can accurately position the hole opening of the small drilling hole, can clearly observe the development condition of the wall rock crack of the whole drilling hole, can confirm whether the epoxy resin cylinder is close to the guide head or not through the film pressure sensor, and can prevent the hollow inclusion from being extruded and damaged due to continuous high-force pressure application through the pushing rod; and observing whether the rear sealing ring of the hollow inclusion stress meter completely enters the small hole, the sealing condition of the rear sealing ring and whether the adhesive reaches the rear part or not through a camera at the side surface of the tail plug, and whether the whole radial gap is full or not. Compared with other hollow inclusion stress meters, the invention can be more conveniently, quickly and successfully installed in place. In the process of measuring the ground stress by using the hollow inclusion stress meter, firstly, the hollow inclusion stress meter is required to be sent to a position in a required drilling hole, pushing the hollow inclusion stress meter (with the diameter of 35 mm) into a large drilling hole with the diameter of 130mm is easy, when the hollow inclusion stress meter is required to enter a small drilling hole with the diameter of 36mm, because the drilling hole is in a black environment, an operator is difficult to see the position of the hole opening of the small drilling hole, the operator loses the target, and the operator can repeatedly try for entering the small drilling hole. Through the high definition wide angle camera of taking the LED lamp that installs at the direction head top of hollow inclusion stress meter, real-time data passes through the data line transmission to the host computer, under the illumination of LED lamp, can clearly show the position of little drilling through the computer to the smooth propelling movement of hollow inclusion stress meter into little drilling can avoid leading to hollow inclusion strainometer damage because of unable judgement direction head and the relative position of little drilling, blind propelling movement makes the touching of direction head big drilling hole bottom. Before the hollow inclusion stress meter enters the small drilling hole, whether the rock slag in the small drilling hole is cleaned can be clearly seen through the high-definition camera, and if the rock slag is not cleaned sufficiently, the rock slag is cleaned again; in the process of pushing the hollow inclusion stress meter into the small borehole, the crack development condition of the rock stratum on the inner wall of the borehole can be seen clearly through the high-definition camera, and if the integrity of the rock stratum cannot meet the requirement, the hole is punched again; the arriving position of the top of the guide head of the hollow bag body can be clearly seen through the high-definition camera; after the top of the guide head of the hollow inclusion stress meter reaches the hole bottom of the small drill hole, the hollow inclusion stress meter is slowly pushed by the pushing rod, the adhesive body slowly overflows from the adhesive outlet hole of the guide head and gradually fills the radial gap between the hollow inclusion stress meter and the small drill hole, when the host machine generates beeping sound, namely the front wall of the epoxy resin cylinder is close to the film sensor and the pressure for pressing the film sensor reaches 10N, at the moment, the epoxy resin cylinder is pushed in place, and the pushing is finished. And observing whether the mucilage glue body is completely filled with the radial gap between the hollow inclusion stress gauge and the small drilling hole through the lateral high-definition camera, and if so, successfully installing. The invention has simple structure, convenient operation and use, accurate guiding and positioning, and wide practicability in the technical field.
Drawings
Fig. 1 is a schematic diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural view of the present invention.
FIG. 3 is a schematic diagram of the structure of the film pressure sensor of the present invention.
Fig. 4 is a schematic cross-sectional view of a radial high-definition camera with a tail plug.
Fig. 5 is a schematic diagram of a top view structure of a radial high-definition camera with a tail plug.
Fig. 6 is a schematic diagram of the front structure of the high-definition camera of the guide head of the present invention.
In the figure: the high-definition camera, the 2-guiding head, the 3-front sealing ring, the 4-glue outlet hole, the 5-film pressure sensor, the 6-plunger body, the 7-epoxy resin cylinder inner hole, the 8-epoxy resin cylinder, the 9-side high-definition camera cable, the 10-side high-definition camera, the 11-tail plug pin, the 12-tail plug central hole, the 13-guiding head front inclined hole, the 14-guiding head small hole, the 15-guiding head rear inclined hole, the 16-plunger central hole, the 17-plunger small hole, the 18-strain flower, the 19-doubles cable 20-tail plug, the 21-rear sealing ring, the 22-merging cable, the 23-host, the 24-pushing rod, the 25-large drilling hole, the 26-small drilling hole, the 27-rock stratum, the 101-camera, the 102-LED lamp 1001-camera and the 1002-LED lamp.
Detailed Description
An embodiment of the invention is further described below with reference to the accompanying drawings:
as shown in fig. 2-6, the hollow inclusion stress meter capable of accurately sensing the whole installation process comprises a guide head (2) provided with a high-definition camera (1), an epoxy resin cylinder (8), a tail plug (20), a merging cable (22), a host machine (23) and front and rear sealing rings, wherein the front and rear sealing rings comprise a front sealing ring (3) arranged on the guide head (2) and a rear sealing ring (21) arranged on the tail plug (20). The camera (101) of the high-definition camera (1) is positioned at the front center of the guide head (2), and a plurality of LED lamps (102) are arranged around the camera (101); the cables are combined into a bus cable (22) through the front oblique hole (13) of the guide head, the small hole (14) of the guide head, the small hole (17) of the plunger, the inner hole (7) of the epoxy resin cylinder, the central hole (12) entering the tail plug and other cables to be discharged from the tail plug (20). The high-definition camera (1) is arranged on the guide head (2) of the high-definition camera, the head of the plunger type guide head is a cone cylinder, a guide head front inclined hole (13) which is communicated with the guide head front inclined hole (13) through a cable is formed in the cone cylinder, a guide head small hole (14) which is communicated with the guide head front inclined hole (13) is formed in the rear portion of the guide head (2), a plunger body (6) is arranged at the rear portion of the guide head (2), the plunger body (6) is inserted into one side of the epoxy resin cylinder (8), a plunger central hole (16) is formed in the middle of the plunger body (6), the plunger central hole (16) directly reaches the guide head (2), a glue outlet hole (4) which is communicated with the plunger central hole (16) is formed in the outer circle of the guide head (2), a plunger small hole (17) which is communicated with the guide head small hole (14) through the cable is formed in the side of the plunger central hole (16), a film pressure sensor (5) is arranged at the outer annular end face of the interface of the plunger body (6) and the guide head (2), and the guide head rear inclined hole (15) which is communicated with a lead wire is formed; the film pressure sensor (5) is fixed at the end part of the outer ring of the interface of the guide head and the plunger body, cables of the film pressure sensor (5) enter a small hole (14) of the guide head through an inclined hole (15) behind the guide head and are combined with cables of the camera (1), the combined cables (22) are combined into a combined cable (22) through a small hole (15) of the plunger, an inner hole (7) of the epoxy resin cylinder, a central hole (12) of the tail plug and other cables, the combined cable is connected with the host (23) from the tail plug (20), and the free length of a two-in-one cable (19) of the camera (1) and the film pressure sensor (5) combined together in the epoxy resin cylinder (8) is more than 5cm longer than the total length of the inner hole of the epoxy resin cylinder (8), so that the plunger body (6) of the guide head (2) can be completely pulled out of the epoxy resin cylinder; and nylon jackets for preventing the cables from being broken are arranged outside the cables so as to prevent the cables from being broken. The tail plug (20) is fixedly arranged in the other side of the epoxy resin cylinder (8), a tail plug central hole (12) through a merging cable (22) is formed in the middle of the tail plug (20), a side high-definition camera (10) is arranged on the tail plug (20), and the side high-definition camera (10) is connected with the merging cable (22) through a side high-definition camera cable (9). The side high-definition camera (10) is located in a radial hole of the outer edge surface of the tail plug (20), and the side high-definition camera (10) comprises a camera (1001) and LED lamps (1002) which are arranged side by side. The cable (9) enters the central hole (12) of the tail plug and other cables through the radial small hole of the tail plug (20) to be combined into a combined cable (22), the wires of the strain gauge (18) on the epoxy resin cylinder (8) are combined with the other cables in the central hole (12) of the tail plug, the combined cable (22) is connected with the host (23) by being discharged from the tail plug (20), and the host (23) has the functions of acoustic-optical signal alarming of the film pressure sensor, image display of the camera and strain test.
As shown in figure 1, the method for using the hollow inclusion stress meter capable of accurately sensing the whole installation process comprises the steps of drilling a large drilling hole (25) with the diameter of 130mm in a rock stratum (27) according to the design length, and continuously drilling a small drilling hole (26) with the diameter of 36mm inwards at the bottom of the large drilling hole (25) according to the design depth; the method comprises the following specific steps:
a. the plunger body (6) of the hollow inclusion stress meter is pulled out, a sufficient amount of adhesive is injected into the epoxy resin cylinder, and then the plunger (6) of the guide head (2) is placed in a set position of the epoxy resin cylinder;
b. the pushing rod (24) and the hollow inclusion stress meter are connected into a whole by utilizing the tail plug pin (11), the hollow inclusion stress meter is pushed by the pushing rod (24) to enter a large drilling hole (25) drilled in a rock stratum (27), and when the hollow inclusion approaches the bottom of the large drilling hole (25), the position of a small drilling hole (26) opening formed at the bottom of the large drilling hole (25) is observed by a high-definition camera (1) at the front part of the guide head (2); in the forward pushing process of the pushing rod (24), the lateral camera (10) of the hollow inclusion stress meter is always at the uppermost position.
c. If the relative positions of the guide head (2) and the orifice of the small drilling hole (26) deviate, the pushing direction of the pushing rod (24) is adjusted at the moment to center the guide head (2) and the orifice of the small drilling hole (26), and then the hollow inclusion stress meter is continuously pushed to slowly enter the small drilling hole (26); in the process of slowly entering the small drilling hole (26), observing the crack development condition of the inner wall of the small drilling hole (26) through a high-definition camera (1) at the front part of the guide head (2), and withdrawing the hollow inclusion stress gauge, replacing the position and re-drilling when the inner wall of the small drilling hole (26) is excessively broken and the integrity of the small drilling hole cannot meet the ground stress test requirement;
d. if the requirements are met, the pushing rod (24) continues to push, when the front end of the epoxy resin cylinder (8) is close to the guide head (2) and extrudes the film sensor (5), and the extrusion force reaches 10N, the host computer (23) sounds and flashes along with lamplight, and the pushing is stopped, so that the epoxy resin cylinder reaches the target position;
e. observing whether the sealing of the rear sealing ring (21) is tight or not through the lateral camera (10), whether the radial gap between the epoxy resin cylinder and the small drilling hole (26) is full of adhesive or not, and if all the requirements are met, finishing the pushing of the hollow inclusion stress gauge, and successfully installing the hollow inclusion stress gauge; if not, reinstalling is needed, and the steps are repeated.
In the process of measuring the ground stress by using the hollow inclusion stress meter, firstly, the hollow inclusion stress meter is required to be sent to a position in a required drilling hole, pushing the hollow inclusion stress meter (with the diameter of 35 mm) into a large drilling hole with the diameter of 130mm is easy, when the hollow inclusion stress meter is required to enter a small drilling hole with the diameter of 36mm, because the drilling hole is in a black environment, an operator is difficult to see the position of the hole opening of the small drilling hole, the operator loses the target, and the operator can repeatedly try for entering the small drilling hole. High definition wide angle camera with LED lamp is installed through the direction head top, and real-time data passes through the data line transmission to the host computer, under the illumination of LED lamp, can clearly show the position of little drilling through the computer to push into little drilling smoothly hollow inclusion stress meter, can avoid leading the big borehole bottom of head touching because of unable judgement direction head and the relative position of little drilling of blind propelling movement, lead to hollow inclusion strainometer damage. Before the hollow inclusion stress meter enters the small drilling hole, whether the rock slag in the small drilling hole is cleaned can be clearly seen through the high-definition camera, and if the rock slag is not cleaned sufficiently, the rock slag is cleaned again; in the process of pushing the hollow inclusion stress meter into the small borehole, the crack development condition of the rock stratum on the inner wall of the borehole can be seen clearly through the high-definition camera, and if the integrity of the rock stratum cannot meet the requirement, the hole is punched again; the arriving position of the top of the guide head of the hollow bag body can be clearly seen through the high-definition camera; when the top of the guide head of the hollow inclusion stress meter reaches the hole bottom of the small drill hole, the hollow inclusion stress meter is slowly pushed by the pushing rod, the adhesive slowly overflows from the overflow hole of the guide head and gradually fills the radial gap between the hollow inclusion stress meter and the small drill hole, when the host machine generates beeping sound, namely the front wall of the epoxy resin cylinder is close to the film sensor and the pressure for extruding the film sensor reaches 10N, the epoxy resin cylinder is pushed in place, the pushing is stopped, and the pushing is ended. And observing whether the mucilage glue body is completely filled in the radial gap between the hollow inclusion stress gauge and the small drilling hole through the lateral high-definition camera, if so, successfully installing, otherwise, failing to install and needing to be reinstalled.
Claims (5)
1. The utility model provides an installation accurate perception's of overall process hollow inclusion stress meter, includes guide head (2) that is equipped with high definition digtal camera (1), epoxy section of thick bamboo (8), tail stopper (20), merge cable (22), host computer (23) and front and back sealing washer, camera (101) of high definition digtal camera (1) are located the front portion central point of guide head (2), are equipped with a plurality of LED lamps (102) around camera (101); the method is characterized in that: the high-definition camera (1) is characterized in that the guide head (2) provided with the high-definition camera (1) is a plunger type guide head, the head of the plunger type guide head is a conical cylinder, a guide head front inclined hole (13) which passes through a cable and a guide head small hole (14) which is communicated with the guide head front inclined hole (13) are formed in the conical cylinder, the rear part of the guide head (2) is a plunger body (6), the plunger body (6) is inserted into one side of the epoxy resin cylinder (8), a plunger center hole (16) is formed in the middle of the plunger body (6), a plunger small hole (17) which is communicated with the guide head small hole (14) and passes through the cable is formed in the side of the plunger center hole (16), a film pressure sensor (5) is arranged on the outer annular end face of the interface of the plunger body (6) and the guide head (2), and a guide head rear inclined hole (15) which is communicated with the cable is formed; the tail plug (20) is fixedly arranged in the other side of the epoxy resin cylinder (8), a tail plug central hole (12) through a merging cable (22) is formed in the middle of the tail plug (20), a side high-definition camera (10) is arranged on the tail plug (20), and the side high-definition camera (10) is connected with the merging cable (22) through a side high-definition camera cable (9).
2. The hollow inclusion stressmeter of the precise sensing throughout the installation process of claim 1, wherein: the free length of a two-in-one cable (19) combined with the cables of the camera (1) and the film pressure sensor (5) in the inner hole (7) of the epoxy resin cylinder is required to be more than 5cm longer than the total length of the inner hole (7) of the epoxy resin cylinder, so that the plunger body (6) of the guide head (2) can be completely pulled out of the epoxy resin cylinder; and nylon jackets for preventing the cables from being broken are arranged outside the cables.
3. The hollow inclusion stressmeter of the precise sensing throughout the installation process of claim 1, wherein: the side high-definition camera (10) is located in a radial hole of the outer edge surface of the tail plug (20), and the side high-definition camera (10) comprises a camera (1001) and LED lamps (1002) which are arranged side by side.
4. A method of using a hollow inclusion stress gauge of the type described in any of claims 1-3, wherein the method comprises drilling a large borehole (25) of 130mm diameter into a formation (27) at a design length, and continuing to drill a small borehole (26) of 36mm diameter inwardly at the bottom of the large borehole (25) at the design depth; the method is characterized by comprising the following steps of:
a. the plunger body (6) of the hollow inclusion stress meter is pulled out, a sufficient amount of adhesive is injected into the epoxy resin cylinder, and then the plunger body (6) of the guide head (2) is placed in a set position of the epoxy resin cylinder;
b. the pushing rod (24) and the hollow inclusion stress meter are connected into a whole by utilizing the tail plug pin (11), the hollow inclusion stress meter is pushed by the pushing rod (24) to enter a large drilling hole (25) drilled in a rock stratum (27), and when the hollow inclusion approaches the bottom of the large drilling hole (25), the position of a small drilling hole (26) opening formed at the bottom of the large drilling hole (25) is observed by a high-definition camera (1) at the front part of the guide head (2);
c. if the relative positions of the guide head (2) and the orifice of the small drilling hole (26) deviate, the pushing direction of the pushing rod (24) is adjusted at the moment to center the guide head (2) and the orifice of the small drilling hole (26), and then the hollow inclusion stress meter is continuously pushed to slowly enter the small drilling hole (26); in the process of slowly entering the small drilling hole (26), observing the crack development condition of the inner wall of the small drilling hole (26) through a high-definition camera (1) at the front part of the guide head (2), and withdrawing the hollow inclusion stress gauge, replacing the position and re-drilling when the inner wall of the small drilling hole (26) is excessively broken and the integrity of the small drilling hole cannot meet the ground stress test requirement;
d. if the requirements are met, the pushing rod (24) continues to push, when the front end of the epoxy resin cylinder (8) is close to the guide head (2) and extrudes the film sensor (5), and the extrusion force reaches 10N, the host computer (23) sounds and flashes along with lamplight, and the pushing is stopped, so that the epoxy resin cylinder reaches the target position;
e. observing whether the sealing of the rear sealing ring (21) is tight or not through the lateral camera (10), whether the radial gap between the epoxy resin cylinder and the small drilling hole (26) is full of adhesive or not, and if all the requirements are met, finishing the pushing of the hollow inclusion stress gauge, and successfully installing the hollow inclusion stress gauge; if the requirements are not met, the steps are repeated, and the installation is performed again.
5. The method for using the hollow inclusion stress meter with accurate sensing in the whole installation process as claimed in claim 4, which is characterized in that: in the forward pushing process of the pushing rod (24), the lateral camera (10) of the hollow inclusion stress meter is always at the uppermost position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311814815.9A CN117782382A (en) | 2023-12-27 | 2023-12-27 | Hollow inclusion stress meter capable of accurately sensing whole installation process and use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311814815.9A CN117782382A (en) | 2023-12-27 | 2023-12-27 | Hollow inclusion stress meter capable of accurately sensing whole installation process and use method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117782382A true CN117782382A (en) | 2024-03-29 |
Family
ID=90399637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311814815.9A Pending CN117782382A (en) | 2023-12-27 | 2023-12-27 | Hollow inclusion stress meter capable of accurately sensing whole installation process and use method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117782382A (en) |
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2023
- 2023-12-27 CN CN202311814815.9A patent/CN117782382A/en active Pending
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