CN113803052B - Ground stress measurement borehole internal environment detection device and detection method thereof - Google Patents
Ground stress measurement borehole internal environment detection device and detection method thereof Download PDFInfo
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- 238000009662 stress testing Methods 0.000 claims abstract description 4
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- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/002—Survey of boreholes or wells by visual inspection
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- 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/001—Self-propelling systems or apparatus, e.g. for moving tools within the horizontal portion of a borehole
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- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/04—Measuring depth or liquid level
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- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/13—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency
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Abstract
The invention relates to a device and a method for detecting the environment in a borehole for measuring the ground stress, belonging to the field of in-situ ground stress testing instruments and equipment for underground deep engineering sites. The device comprises a cylindrical detection vehicle, a switching sleeve, an image information acquisition device and an image information acquisition control system, wherein a wide-angle camera in the cylindrical detection vehicle is connected with a main board through a signal line, the main board is connected with a signal conversion module, image data information is converted through the signal conversion module, and the signal conversion module transmits the converted image information to the image information acquisition control system through an external signal interface or a wireless transmission module. The method is used for detecting the internal environment of the drilled hole before the geostress test in the trepanning stress relief method, and further identifying and judging whether the internal environment condition meets the installation test requirement of the geostress test equipment, so that the test is avoided from being carried out by blind or subjective assumption depending on experience, the test success rate is greatly improved, the test cost is reduced, and the data is transmitted in real time.
Description
Technical Field
The invention relates to a device and a method for detecting the internal environment of a borehole for measuring ground stress, in particular to a device and a method for detecting the internal environment of the borehole for measuring ground stress, which are used for researching the ground stress measurement and distribution rule of deep underground engineering, have important values for improving the success rate of ground stress test by a trepanning stress relieving method and guaranteeing the accuracy and reliability of a test result, and belong to the field of in-situ ground stress test instruments and equipment of underground deep engineering sites.
Background
The ground stress is the fundamental acting force causing deformation and damage of mining, water conservancy and hydropower, civil construction, roads and various underground geotechnical excavation engineering, and scientific and accurate ground stress measurement is the necessary premise of determining the mechanical property of engineering rock mass, carrying out surrounding rock stability analysis and realizing geotechnical engineering decision making, design and excavation scientification.
With the rapid increase of the national energy strategic demand, a great deal of energy development rapidly advances to deep underground engineering, especially in underground mining engineering, the problems of regional stability and stability of roadways and stopes are closely related to the ground stress field, so that the research of the ground stress has important theoretical and practical values. The trepanning stress relief method is a method for determining the stress of the original rock, which is the most mature technology in the world at present and has the strongest applicability and reliability, but has the disadvantages of high requirements on measurement technology and process, low test success rate on complex geological conditions and high test cost consumption. And installation test equipment on the existing market can only determine the depth in the hole by depth, no effective equipment peeps and distinguishes the interior environment of the hole to its downthehole, and the installation pole is usually longer can produce the recurvation, lead to the test result deviation great, especially the accurate control and the measurement deviation to the bottom aperture degree of depth that is really used for the test are great, bottom hole section core often can remain, hollow inclusion strainometer often leads to the test result failure because of the installation is not in place, consequently, need urgently to develop a device that is used for the interior environment of inspection hole to satisfy ground stress test requirement and be used for solving the problem that the blind test leads to the test failure. Therefore, some researchers have tried to invent some devices to solve the problem of the testing method.
Patent application number is CN 212898472U introduces a peeping and coring device for tunnel ground stress test, can realize the distance measurement wall of range finding in-process and peep, but its camera one end is not equipped with the light filling device, is difficult to carry out image feedback to the environment of shading in the survey hole, and the device's range finding module is installed around the large aperture, can't measure the aperture degree of depth with true testing.
The invention patent with the application number of CN 212803208U introduces a device for determining that a hollow bag body completely enters a hole in a ground stress test, wherein a BB whistle is arranged on the periphery of the hollow bag body, the hole entering condition of the hollow bag body is judged according to the whistle sound, and the device cannot detect the small hole environment for the test.
In summary, the ground stress measurement borehole internal environment detection device developed at present mainly has several problems: (1) the environment in the small hole segment used for measurement is difficult to peep and detect, and the measurable environment in the small hole cannot be judged; (2) no effective equipment is available for realizing automatic detection of the internal environment of the hole; (3) the distance measurement generally adopts non-contact laser distance measurement, and field test results show that water mist is easily formed in holes of small hole sections, floating rock powder exists in the holes, light rays are difficult to penetrate through the holes, and the error of a non-contact measurement mode is large.
Disclosure of Invention
Aiming at the existing problems, the invention provides a borehole internal environment detection device for geostress measurement and a detection method thereof, which can realize peeking on the wall information of the whole region section in the borehole and the internal environment in the borehole in the detection process, and simultaneously realize measurement of the depth of a small hole and detection of a residual rock core at the bottom end of the small hole section in any environment by adopting a mechanical distance measuring device, thereby effectively solving the problem of detection of the internal environment in the borehole.
The technical scheme adopted by the invention is as follows: an apparatus for detecting an environment in a borehole for geostress measurements, comprising: the cylindrical detection vehicle 4 comprises a vehicle body, an inner circumferential roller 5, a switching rear cover 6, a wireless transmission module 13, a signal conversion module 14, a main board 25, a power supply module 16, a servo motor 18 and a ranging rod 19, wherein the inner circumferential roller 5, the switching rear cover 6, the wireless transmission module 13, the signal conversion module 14, the main board 25, the power supply module 16, the servo motor 18 and the ranging rod 19 are installed on the outer wall of the vehicle body, the circumferential roller 5, a main power switch 8-1, a servo motor control switch 8-2 and an external signal interface 15 are arranged on the outer wall of the vehicle body, the wireless transmission module 13, the signal conversion module 14, the main board 25, the power supply module 16, the servo motor 18 and the ranging rod 19 are installed in the vehicle body, the switching rear cover 6 is arranged at the rear end of the vehicle body, the handheld mounting rod 7 is connected to the rear end of the switching rear cover 6, the switching sleeve 9 is detachably connected to the front end of the vehicle body, the image information acquisition device 10 is detachably connected to the front end of the switching sleeve 9, and the image information acquisition device 10 comprises a shell, The light supplementing LED lamp 12 and the wide-angle camera 22, the wide-angle camera 22 is installed at the center of the front end of the shell, a plurality of light supplementing LED lamps 12 are evenly arranged around the wide-angle camera 22 in an annular shape, the most front end and the middle part of the car body are respectively provided with a guide ring 20, a ranging rod 19 is slidably installed in the guide ring 20, a safety limit valve 23 is arranged on the car body at the front end of the switching rear cover 6, one side wall of the ranging rod 19 is provided with a scale value, the other side wall of the ranging rod is provided with a gear strip, the ranging rod 19 is meshed with the gear 21 through the gear strip, the gear 21 is installed on a servo motor 18, the servo motor 18 is connected with a servo motor control switch 8-2, the wide-angle camera 22, the safety limit valve 23, the servo motor 18, a signal conversion module 14, a power module 16 and a main power switch 8-1 are all connected with a mainboard 25, the signal conversion module 14 is respectively connected with an external signal interface 15 and an input end of a wireless transmission module 13, the external signal interface 15 and the output end of the wireless transmission module 13 are connected with the image information acquisition control system 24.
Preferably, a high-precision tilt angle sensor 17 connected with the signal conversion module 14 is further arranged in the body of the cylindrical detection vehicle 4.
Preferably, the image information acquisition device 10 is connected to the front end of the adapter sleeve 9 through a screw thread, and the rear end of the adapter sleeve 9 is connected to the front end of the barrel-shaped inspection vehicle 4 through a screw thread.
Preferably, the wide-angle camera 22 is fixed to the housing of the image information collecting apparatus 10 through the fixed valve 11.
Preferably, there are 12 circumferential rollers 5, which are respectively designed at the front and rear ends of the outer wall of the cylindrical detection vehicle 4, and 6 circumferential rollers are respectively designed at the front and rear ends of the outer wall of the cylindrical detection vehicle.
Preferably, the cartridge type inspection vehicle 4 is an integral sealing structure.
A detection method of the device for detecting the environment in the borehole for measuring the ground stress comprises the following steps:
s1, when the drilling depth for testing reaches the designed specified depth, cleaning residues and rock powder in the drilling hole, entering a debugging link of an environment detection device in the drilling hole after the cleaning stage is completed, turning on a main power switch 8-1 and a servo motor switch 8-2, installing an image information acquisition device 10 at the front end of a switching sleeve 9, observing whether an LED lamp 12 is normal, simultaneously turning on an image information acquisition control system 24, checking whether wireless/wired signal transmission is normal, observing whether image information transmission and display are normal, and preparing to assemble all parts after the wireless/wired signal transmission and display are normal;
s2, moving the barrel-type detection vehicle 4 forward or backward, and observing and detecting whether the image acquisition and transmission process of the system is normal;
s3, after the data transmission is normal, the hand-held mounting rod 7 is mounted on the switching back cover 6 at the back end of the cylindrical detection vehicle 4, the installation rod 7 is pushed to push the cylindrical detection vehicle 4 into the large hole 2, the installation rod 7 is held by hand to be slowly pushed forward, the cylindrical detection vehicle 4 is pushed into a drill hole at a constant speed, the wide-angle camera 22 transmits a shot image signal to the main board 25 in real time, the main board 25 transmits the received image signal to the signal conversion module 14, the signal conversion module 14 transmits the converted information to the image information acquisition control system 24 through the external signal interface 15 and/or the wireless transmission module 13, a worker observes an image display result in the hole in real time through the image information acquisition control system 24 until the image display result is transmitted to a preset position at the bottom of the small hole 3, the image information acquisition control system 24 stores image information data acquired in the hole during the traveling process of the cylindrical inspection vehicle 4;
s4, after image information is collected, the mounting rod 7 is held by hand to slowly withdraw the cylindrical detection vehicle 4 from the large hole 2, and after the cylindrical detection vehicle is withdrawn, the image information collection device 10 and the adapter sleeve 9 are replaced and taken out;
s5, starting a servo motor switch 8-2, controlling the ranging rod 19 to move forwards or backwards through the servo motor 18, observing whether the ranging rod 19 normally moves or not, resetting and zeroing the ranging rod 19 after the ranging rod is normal, namely, the front end of the ranging rod 19 retreats to an exposure minimum length value of 0 scale value, sending the cylindrical detection vehicle 4 into the small hole 3, stopping moving forwards when the cylindrical detection vehicle 4 cannot be pushed, fixing the cylindrical detection vehicle 4, starting the servo motor switch 8-2, when the servo motor 18 stops rotating, enabling the servo motor 18 to be in a braking state, then retreating the cylindrical detection vehicle 4, recording the exposure scale value of the ranging rod 19, and fixing the exposure scale value and the length value of the front end fixing interface of the cylindrical detection vehicle 4l 0I.e. the actual hole depth of the small hole 3;
s6, judging whether the hole internal environment condition meets the ground stress equipment test condition or not according to the image display information and the hole depth measurement result, and simultaneously recording the hole internal detection result and the detection information to be used as a basis for whether the next step is carried out or not, if the hole internal environment does not meet the ground stress test requirement, stopping the installation of the ground stress test equipment, and searching the position meeting the test condition again;
s7, after image acquisition is finished, making in-hole image information storage and hole depth data record, and performing in-hole adaptive environment detection again before formal installation of ground stress testing equipment to ensure the reliability of the testing result and the success rate of the testing process;
s8, after the test is completed, recording surrounding rock environment information in the hole, cleaning stains on the detection device, enabling the detection device to be in a clean and dry state, and then installing all the parts back into the detection device box in situ to be used for next detection.
The invention has the beneficial effects that:
(1) the instrument is light and handy, the detection process is intuitive and quick, the data acquisition is automatic, and the operation is convenient;
(2) the design idea is simple, the manufacturing material price is low, and the design and the manufacturing are convenient;
(3) the image information of the wall rock in the hole can be transmitted and displayed in real time, and a user can quickly judge the quality condition of the surrounding rock in the hole;
(4) the wireless data transmission device is convenient to use, has automatic acquisition capacity by adopting wireless data transmission, can adapt to complex in-hole environment detection, and has strong anti-interference capacity;
(5) the peeping of unknown environments in the holes can be realized, whether the environments in the holes meet the test requirements can be accurately judged in advance, blind tests are avoided, the test failure rate is reduced, the test cost is saved, and the reliability of test results is effectively improved;
(6) mechanical measurement can be realized on the hole depth of the small hole section, the residual length of the core rock at the bottom of the hole is measured and calculated, and then whether the requirement for installing ground stress measuring equipment is met or not is judged, the problems that water mist in the small hole is large and dust interference causes large measuring errors when laser ranging is adopted are solved, and a hollow inclusion stress meter is improved;
(7) the novel automatic in-hole information detection instrument can be provided for the ground stress measurement technology of the deep excavation engineering, the accuracy and the reliability of the ground stress measurement result are effectively improved, the test cost is reduced, more reliable data support is provided for the support design of the underground excavation engineering, and the life and property safety of underground engineering operators is guaranteed.
Drawings
FIG. 1 is an overall structural view of the apparatus of the present invention and an enlarged sectional view of a cartridge type inspection vehicle;
FIG. 2 is a cross-sectional view of an image information acquisition device of the present invention;
FIG. 3 is a perspective view of the wide-angle camera of the present invention;
FIG. 4 is an internal structural view of the cartridge type inspection vehicle of the present invention;
fig. 5 shows a ranging rod structure according to the present invention.
The reference numbers in the figures are: the device comprises a surrounding rock-1, a large hole-2, a small hole-3, a cylindrical detection vehicle-4, a circumferential roller-5, a switching rear cover-6, a handheld installation rod-7, a main switch-8-1, a servo motor switch-8-2, a switching sleeve-9, an image acquisition device-10, a fixed valve-11, a light supplement LED lamp-12, a wireless transmission module-13, a signal conversion module-14, an external signal interface-15, a power supply module-16, a high-precision inclinometer-17, a servo motor-18, a ranging rod-19, a gear-20, a guide ring-21, a wide-angle camera-22, a limit safety valve-23, an image information acquisition control system-24 and a main board-25.
Detailed Description
The invention is explained in more detail below with reference to the figures and examples, without limiting the scope of the invention.
Example 1: as shown in fig. 1 to 5, an apparatus for detecting an environment in a borehole for geostress measurement, comprising: the cylindrical detection vehicle 4 comprises a vehicle body, an inner circumferential roller 5, a switching rear cover 6, a wireless transmission module 13, a signal conversion module 14, a main board 25, a power supply module 16, a servo motor 18 and a ranging rod 19, wherein the inner circumferential roller 5, the switching rear cover 6, the wireless transmission module 13, the signal conversion module 14, the main board 25, the power supply module 16, the servo motor 18 and the ranging rod 19 are installed on the outer wall of the vehicle body, the circumferential roller 5, a main power switch 8-1, a servo motor control switch 8-2 and an external signal interface 15 are arranged on the outer wall of the vehicle body, the wireless transmission module 13, the signal conversion module 14, the main board 25, the power supply module 16, the servo motor 18 and the ranging rod 19 are installed in the vehicle body, the switching rear cover 6 is arranged at the rear end of the vehicle body, the rear end of the switching rear cover 6 is connected with a handheld installation rod 7 through threads, the front end of the vehicle body is detachably connected with the switching sleeve 9, the front end of the switching sleeve 9 is detachably connected with the image information acquisition device 10, image information collection system 10 includes the casing, light filling LED lamp 12 and wide-angle camera 22, wide-angle camera 22 installs in the front end central point of casing and puts, 8 light filling LED lamps 12 are the annular and evenly arrange around wide-angle camera 22, light filling LED lamp 12 is used for providing camera information acquisition's light demand, wide-angle camera 22 is used for gathering in real time and the development of observation hole internal face crack, the delivery port, information such as rock dust deposition volume, so that judge whether downthehole country rock environmental condition satisfies ground stress test requirement. The front end and the middle part of the vehicle body are respectively provided with a guide ring 20, a ranging rod 19 is slidably arranged in the guide ring 20, a safety limit valve 23 is arranged on the vehicle body at the front end of the switching rear cover 6, one side wall of the ranging rod 19 is provided with a scale value, the other side wall of the ranging rod is provided with a gear strip, the ranging rod 19 is meshed with the gear 21 through the gear strip, the gear 21 is arranged on a servo motor 18, the servo motor 18 is connected with a servo motor control switch 8-2, a wide-angle camera 22, the safety limit valve 23, the servo motor 18, a signal conversion module 14, a power module 16 and a main power switch 8-1 are all connected with a main board 25, the signal conversion module 14 is respectively connected with an external signal interface 15 and an input end of a wireless transmission module 13, and the output ends of the external signal interface 15 and the wireless transmission module 13 are connected with an image information acquisition control system 24.
The power module 16 provides power for the whole device, and power supply can be replaced at any time, so that adaptability of engineering environment is effectively improved. The length of the adapter sleeve 9 can be processed according to the depth in the hole, so that the front end of the image information acquisition device 10 can be ensured to be deep into the bottom of the small hole 3.
The wide-angle camera 22 is connected with the mainboard 25 through a signal line, the mainboard 25 is connected with the signal conversion module 14, the image data information is converted through the signal conversion module 14, and the signal conversion module 14 transmits the converted image information to the image information acquisition control system 24 through the external signal interface 15 and/or the wireless transmission module 13, so that the automation and the anti-interference capability of the signal acquisition and transmission process are greatly improved.
The cylindrical detection vehicle 4 is mainly used for identifying the internal environment of the surrounding rock hole, judging indexes such as the water yield in the hole, the water outlet position, the length of a residual rock core in a bottom hole, the actual hole depth of a small hole and the like, providing accurate and reliable information data in the hole for the installation of ground stress test equipment, and meanwhile, the image acquisition result of the wall rock in the hole can also be used as a judgment basis for the engineering disturbance range, so that the quality of the engineering surrounding rock can be evaluated.
Furthermore, a high-precision inclination angle sensor 17 connected with the signal conversion module 14 is further arranged in the body of the cylindrical detection vehicle 4, the high-precision inclination angle sensor 17 can measure the inclination angle of the drill hole, and the signal conversion module 14 transmits the converted information of the inclination angle of the drill hole to the image information acquisition control system 24 through the external signal interface 15 and/or the wireless transmission module 13.
The safety limit valve is used for controlling the moving range of the ranging rod 19 and preventing the ranging rod 19 from being out of range and out of gear in the advancing process.
Further, image information collection system 10 passes through threaded connection in adapter sleeve 9 front end, and adapter sleeve 9 rear end passes through threaded connection in the barrel-type detects 4 front ends of car, simple structure, and it is convenient to dismantle.
Furthermore, the wide-angle camera 22 is fixed on the housing of the image information acquisition device 10 through the fixed valve 11, so that the wide-angle camera 22 can be firmly fixed and stably shoot.
Furthermore, there are 12 circumferential rollers 5, and the circumferential rollers are respectively designed on the front end and the rear end of the outer wall of the cylindrical detection vehicle 4, and 6 circumferential rollers are respectively designed on the front end and the rear end of the outer wall of the cylindrical detection vehicle. The circumferential roller 5 is used for ensuring the balance and stability of the barrel-shaped detection vehicle 4 in the advancing process, preventing the detection vehicle from being inclined, rotating and the like in the advancing process, and ensuring the reliability and stability of the image information acquisition process.
Further, the cartridge type detection vehicle 4 is an integral sealing structure, the outer wall is made of alloy, the sealing performance is good, the waterproof function is achieved, and the high-precision tilt sensor 17, the wireless transmission module 13, the signal conversion module 14, the main board 25, the power module 16 and the servo motor 18 are all arranged in the cavity of the cartridge type detection vehicle, so that the cartridge type detection vehicle has the function of protecting all elements in the cavity of the detection vehicle. When the depth of the small hole 3 is measured and the adapter sleeve 9 and the image information acquisition device 10 need to be removed, the guide ring 20 designed at the most front end of the cylindrical detection vehicle 4 can effectively resist the front-end water quantity from entering the cavity of the cylindrical detection vehicle 4.
A detection method of the device for detecting the environment in the borehole for measuring the ground stress comprises the following steps:
s1, when the drilling depth for testing reaches the designed specified depth, cleaning residues and rock powder in the drilling hole, entering a debugging link of an environment detection device in the drilling hole after the cleaning stage is completed, turning on a main power switch 8-1 and a servo motor switch 8-2, installing an image information acquisition device 10 at the front end of a switching sleeve 9, observing whether an LED lamp 12 is normal, simultaneously turning on an image information acquisition control system 24, checking whether wireless/wired signal transmission is normal, observing whether image information transmission and display are normal, and preparing to assemble all parts after the wireless/wired signal transmission and display are normal;
s2, moving the barrel-type detection vehicle 4 forward or backward, and observing and detecting whether the image acquisition and transmission process of the system is normal;
s3, after the data transmission is normal, the hand-held mounting rod 7 is mounted on the switching back cover 6 at the back end of the cylindrical detection vehicle 4, the installation rod 7 is pushed to push the cylindrical detection vehicle 4 into the large hole 2, the installation rod 7 is held by hand to be slowly pushed forward, the cylindrical detection vehicle 4 is pushed into the drill hole at a constant speed, the wide-angle camera 22 transmits the shot picture to the main board 25 in real time, the main board 25 transmits the received picture to the signal conversion module 14, the signal conversion module 14 transmits the converted information to the image information acquisition control system 24 through the external signal interface 15 and/or the wireless transmission module 13, a worker observes the image display result in the hole in real time through the image information acquisition control system 24 until the image display result is transmitted to the preset position of the bottom of the small hole 3, the image information acquisition control system 24 stores image information data acquired in the hole during the traveling process of the cylindrical inspection vehicle 4;
s4, after image information is collected, the mounting rod 7 is held by hand to slowly withdraw the cylindrical detection vehicle 4 from the large hole 2, and after the cylindrical detection vehicle is withdrawn, the image information collection device 10 and the adapter sleeve 9 are replaced and taken out;
s5, starting a servo motor switch 8-2, controlling the ranging rod 19 to move forwards or backwards through the servo motor 18, observing whether the ranging rod 19 normally moves or not, resetting and zeroing the ranging rod 19 after the ranging rod is normal, namely, the front end of the ranging rod 19 retreats to an exposure minimum length value of 0 scale value, sending the cylindrical detection vehicle 4 into the small hole 3, stopping moving forwards when the cylindrical detection vehicle 4 cannot be pushed, fixing the cylindrical detection vehicle 4, starting the servo motor switch 8-2, when the servo motor 18 stops rotating, enabling the servo motor 18 to be in a braking state, then retreating the cylindrical detection vehicle 4, recording the exposure scale value of the ranging rod 19, and fixing the exposure scale value and the length value of the front end fixing interface of the cylindrical detection vehicle 4l 0I.e. the actual hole depth of the small hole 3;
s6, judging whether the hole internal environment condition meets the ground stress equipment test condition or not according to the image display information and the hole depth measurement result, and simultaneously recording the hole internal detection result and the detection information to be used as a basis for whether the next step is carried out or not, if the hole internal environment does not meet the ground stress test requirement, stopping the installation of the ground stress test equipment, and searching the position meeting the test condition again;
s7, after image acquisition is finished, making in-hole image information storage and hole depth data record, and performing in-hole adaptive environment detection again before formal installation of ground stress testing equipment to ensure the reliability of the testing result and the success rate of the testing process;
s8, after the test is completed, recording surrounding rock environment information in the hole, cleaning stains on the detection device, enabling the detection device to be in a clean and dry state, and then installing all the parts back into the detection device box in situ to be used for next detection.
The distance measuring device is composed of a limit safety valve 23, a servo motor 18, a ranging rod 19, a gear 21 and a guide ring 20 which are contacted and linked with each other, the gear 20 is driven by the servo motor 18 to rotate, the ranging rod 19 with a gear strip is further pulled to move back and forth, when the front end of the ranging rod 19 touches rocks, the ranging rod automatically stops, then the measuring vehicle is withdrawn, the scale value of the ranging rod 19 exposed out of the cylindrical detecting vehicle 4 is read, the record of the scale value is made, and the accurate measurement of the real depth of the small hole 3 is further realized. Meanwhile, due to the fact that the drill hole is deep and the hole diameter is small, the residual core section at the bottom of the hole is difficult to calculate accurately, installation of the stress gauge of the hollow inclusion body can be influenced, the residual core length at the bottom of the hole can be calculated indirectly through accurate measurement of the hole depth of the small hole section, and the residual core length can be used as a basis for treating the residual core at the bottom of the hole or not, the problem that the hollow inclusion body is often failed to install due to inaccurate distance measurement of the small hole depth or residual hole blocking of the core is solved effectively, the problem that test failure is caused by the fact that test is carried out only by experience feeling or subjective assumption is avoided, the test success rate is improved greatly, the test cost is reduced, and the reliability of test results is guaranteed.
According to the invention, an unknown environment signal which is invisible in the drilling hole depth is displayed on a display column of the image information acquisition control system 24, so that a technician or a tester can judge whether the in-hole environment is suitable for carrying out a ground stress test according to the image information displayed in real time to be used as a reference basis before the ground stress test equipment is installed; meanwhile, in order to solve the problem that the length of the residual core at the bottom of the hole of the small hole section in the drilled hole is difficult to accurately measure, the detection device provided by the invention adopts a contact type direct measurement method to measure the depth of the small hole 3, so that the influence of water, water mist, dust, residues and the like in the hole of the small hole section on distance measurement is effectively avoided, the test result is more reliable, a powerful guarantee is provided for smoothly installing the hollow inclusion stressometer, and the test success rate is greatly improved.
Although the specific embodiments have been described in detail with reference to the drawings, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art. Equivalent changes made within the scope of the invention, design and construction under different scales are all included in the protection scope of the invention.
Claims (7)
1. The device for detecting the environment in the borehole for measuring the ground stress is characterized in that: comprises a cylindrical detection vehicle (4), a switching sleeve (9), an image information acquisition device (10) and an image information acquisition control system (24), wherein the cylindrical detection vehicle (4) comprises a vehicle body, a circumferential roller (5), a switching rear cover (6), a wireless transmission module (13), a signal conversion module (14), a mainboard (25), a power module (16), a servo motor (18) and a ranging rod (19), the circumferential roller (5), a main power switch (8-1), a servo motor control switch (8-2) and an external signal interface (15) are arranged on the outer wall of the vehicle body, the wireless transmission module (13), the signal conversion module (14), the mainboard (25), the power module (16), the servo motor (18) and the ranging rod (19) are arranged in the vehicle body, the switching rear cover (6) is arranged at the rear end of the vehicle body, the rear end of the switching rear cover (6) is connected with a handheld mounting rod (7), the front end of a vehicle body is detachably connected with a switching sleeve (9), the front end of the switching sleeve (9) is detachably connected with an image information acquisition device (10), the image information acquisition device (10) comprises a shell, light supplementing LED lamps (12) and a wide-angle camera (22), the wide-angle camera (22) is installed at the center position of the front end of the shell, a plurality of light supplementing LED lamps (12) are uniformly arranged around the wide-angle camera (22) in an annular shape, guide rings (20) are respectively arranged at the foremost end and the middle part of the vehicle body, a ranging rod (19) is slidably installed in the guide rings (20), a safety limit valve (23) is arranged on the vehicle body at the front end of a switching rear cover (6), one side wall of the ranging rod (19) is provided with a scale interval, the other side wall is provided with a gear strip, the ranging rod (19) is meshed with a gear (21) through the gear strip, the gear (21) is installed on a servo motor (18), the servo motor (18) is connected with a servo motor control switch (8-2), the wide-angle camera (22), the safety limit valve (23), the servo motor (18), the signal conversion module (14), the power module (16) and the main power switch (8-1) are all connected with the mainboard (25), the signal conversion module (14) is respectively connected with the input end of the external signal interface (15) and the input end of the wireless transmission module (13), and the output end of the external signal interface (15) and the output end of the wireless transmission module (13) are connected with the image information acquisition control system (24).
2. The apparatus for detecting the environment in the borehole for measuring the ground stress according to claim 1, wherein: and a high-precision tilt angle sensor (17) connected with the signal conversion module (14) is further arranged in the cylindrical detection vehicle (4).
3. The apparatus for detecting the environment in the borehole for measuring the ground stress according to claim 1, wherein: the image information acquisition device (10) is connected to the front end of the adapter sleeve (9) through threads, and the rear end of the adapter sleeve (9) is connected to the front end of the barrel-shaped detection vehicle (4) through threads.
4. The apparatus for detecting the environment in the borehole for measuring the ground stress according to claim 1, wherein: the wide-angle camera (22) is fixed on a shell of the image information acquisition device (10) through a fixed valve (11).
5. The apparatus for detecting the environment in the borehole for measuring the ground stress according to claim 1, wherein: the number of the circumferential rollers (5) is 12, and the circumferential rollers are respectively designed on the front end and the rear end of the outer wall of the cylindrical detection vehicle (4) and are respectively 6.
6. The apparatus for detecting the environment in the borehole for measuring the ground stress according to claim 1, wherein: the cylindrical detection vehicle (4) is of an integral sealing structure.
7. The method for detecting the internal environment detection device of the earth stress measurement borehole of any one of claims 1 to 6, wherein: the method comprises the following steps:
s1, when the drilling depth for testing reaches the designed specified depth, cleaning residues and rock powder in the drilling hole, entering a debugging link of an environment detection device in the drilling hole after the cleaning stage is completed, turning on a main power switch (8-1) and a servo motor switch (8-2), installing an image information acquisition device (10) at the front end of a switching sleeve (9), observing whether an LED lamp (12) is normal, simultaneously turning on an image information acquisition control system (24), checking whether wireless/wired signal transmission is normal, observing whether image information transmission and display are normal, and preparing to assemble all parts after all parts are normal;
s2, moving the barrel-type detection vehicle (4) forward or backward, and observing and detecting whether the image acquisition and transmission process of the system is normal;
s3, after various data are normally transmitted, a handheld mounting rod (7) is mounted on a switching rear cover (6) at the rear end of a cylindrical detection vehicle (4), the cylindrical detection vehicle (4) is pushed into a large hole (2) by pushing the mounting rod (7), the handheld mounting rod (7) is slowly pushed forward, the cylindrical detection vehicle (4) is pushed into a drill hole at a constant speed, a wide-angle camera (22) transmits a shot picture to a main board (25) in real time, the main board (25) sends the received picture to a signal conversion module (14), the signal conversion module (14) transmits the converted information to an image information acquisition control system (24) through an external signal interface (15) and/or a wireless transmission module (13), a worker observes an image display result in the hole in real time through the image information acquisition control system (24) until the image display result is sent to a preset position of the hole bottom of the small hole (3), the image information acquisition control system (24) stores image information data acquired in the holes in the process of advancing the cylindrical detection vehicle (4);
s4, after image information is collected, the mounting rod (7) is held by hand to slowly withdraw the cylindrical detection vehicle (4) from the large hole (2), and the image information collection device (10) and the adapter sleeve (9) are replaced and taken out after the cylindrical detection vehicle is withdrawn;
s5, a servo motor switch (8-2) is started, the distance measuring ruler (19) is controlled to advance or retreat through the servo motor (18), whether the distance measuring ruler (19) advances normally is observed, the distance measuring ruler (19) is reset to zero after normal operation, namely, the front end of the distance measuring ruler (19) retreats to an exposure minimum length value of 0 scale value, the barrel-shaped detection vehicle (4) is sent into the small hole (3), the advance is stopped when the barrel-shaped detection vehicle (4) cannot be pushed, the barrel-shaped detection vehicle (4) is fixed, the servo motor switch (8-2) is started, the servo motor (18) is switched to a braking state when the servo motor (18) stops rotating, the barrel-shaped detection vehicle (4) is withdrawn, the exposure scale value of the distance measuring ruler (19) is recorded, and the exposure scale value and the front end fixed interface length value of the barrel-shaped detection vehicle (4) are fixedl 0The actual hole depth of the small hole (3) is obtained;
s6, judging whether the hole internal environment condition meets the ground stress equipment test condition or not according to the image display information and the hole depth measurement result, and simultaneously recording the hole internal detection result and the detection information to be used as a basis for whether the next step is carried out or not, if the hole internal environment does not meet the ground stress test requirement, stopping the installation of the ground stress test equipment, and searching the position meeting the test condition again;
s7, after image acquisition is finished, making in-hole image information storage and hole depth data record, and performing in-hole adaptive environment detection again before formal installation of ground stress testing equipment to ensure the reliability of the testing result and the success rate of the testing process;
s8, after the test is completed, recording surrounding rock environment information in the hole, cleaning stains on the detection device, enabling the detection device to be in a clean and dry state, and then installing all the parts back into the detection device box in situ to be used for next detection.
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| CN114658414B (en) * | 2022-03-31 | 2024-08-02 | 河南理工大学 | Lower hole detection method of drilling television control system and drilling television monitoring equipment |
| CN114441073B (en) * | 2022-04-07 | 2022-08-16 | 中国科学院武汉岩土力学研究所 | Small-aperture deep-hole ground stress testing system and method for water conservancy exploration drilling |
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