Digital surrounding rock coring equipment and method matched with advanced horizontal drill

Abstract

The invention provides a digital surrounding rock coring device and method matched with an advanced horizontal driller, the digital surrounding rock coring device matched with the advanced horizontal driller comprises a camera shooting acquisition device, one end of the camera shooting acquisition device is provided with a tensile cable used for power supply and data transmission of the camera shooting acquisition device, and the other end of the camera shooting acquisition device is provided with a data transmission device. A control device is connected to one end, deviating from the camera shooting acquisition device, of the tensile cable; the application scene of the digital surrounding rock coring equipment matched with the advanced horizontal drill is that the advanced horizontal drill site is constructed on a tunnel construction face, digital coring is carried out through the camera shooting collecting device 1, the coring difficulty and the working intensity of surrounding rock coring are reduced, and the digital surrounding rock coring equipment is suitable for horizontal drilling of different drilling diameters and geological working conditions; through a digital surrounding rock coring method, a corresponding relation between advanced horizontal drilling footage and digital surrounding rock is established, a digital surrounding rock database of the whole tunnel is established, and control, study and judgment of geological data are enhanced.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel engineering, and in particular relates to a digital surrounding rock coring device and method supporting advanced horizontal drilling. Background Art

[0002] During tunnel construction, it is necessary to promptly investigate the geological conditions ahead in order to improve construction measures to cope with the changing geological conditions ahead. Especially in working conditions with poor surrounding rock conditions, advanced geological forecasting is particularly important for optimizing construction plans and avoiding construction risks.

[0003] Advanced horizontal drilling is the most commonly used and direct method of advanced geological prediction. Horizontal drilling is carried out by advanced horizontal drilling rigs. The surrounding rock is cored at the same time. After the depth is calibrated, the core is sent to the laboratory for testing to obtain important geological parameters such as the uniaxial compressive strength and RQD of the surrounding rock.

[0004] Conventional coring construction methods are difficult to coring and inefficient. The impact drill bit destroys and disturbs the surrounding rock, causing the core to be broken and the coring rate is low, making it impossible to obtain complete advanced horizontal drilling data. The core is heavy, difficult to transport and store, and is easily damaged or misnumbered during transportation, resulting in a large workload and low efficiency. Core samples are not convenient to review, and important geological data lacks a visual and information-based management method. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a digital surrounding rock coring device and method for supporting advanced horizontal drilling, which is portable, easy to use and can improve the efficiency of advanced geological forecasting operations.

[0006] The technical solution of the present invention is: a digital surrounding rock coring device for advanced horizontal drilling, comprising a video acquisition device, one end of which is provided with a tensile cable for power supply and data transmission, and the end of the tensile cable away from the video acquisition device is connected to a control device;

[0007] The video acquisition device has a shell, a camera is centrally arranged at one end of the shell away from the tensile cable, a plurality of searchlights are evenly arranged around the camera at the end of the shell, and a driving wheel and a driving motor for driving the driving wheel to move are rotatably arranged in the shell;

[0008] The control device has a control mainboard, a built-in battery and a cable reel. The control mainboard is connected to the camera, the searchlight and the drive motor respectively through anti-tension cables. The built-in battery is used to supply power to the control device and the video acquisition device. The cable reel is used to reel or release the anti-tension cable. The cable reel has an encoder, and the encoder is used to obtain the incoming and reeling lengths of the anti-tension cable.

[0009] At least three hinge seats are arranged in a circular array on the outer side of one end of the shell away from the camera, a support arm is elastically hinged on the support seat, and a driven wheel is rotatably arranged on one end of the support arm away from the hinge seat.

[0010] The control mainboard is provided with a charging interface and a data transmission interface.

[0011] The camera is a high-definition wide-angle camera with a resolution of no less than 5 million pixels.

[0012] The tensile strength of the tensile cable is not less than 30Mpa.

[0013] The built-in battery is a lithium battery with a capacity of 50,000 mAh.

[0014] The digital surrounding rock coring method for supporting advanced horizontal drilling includes the following steps:

[0015] Tunnel advance horizontal drilling: conduct advance horizontal drilling at the heading face where advance horizontal drilling is required, and observe the quality of the hole and the status inside the hole;

[0016] Create a new engineering file according to the name of the construction tunnel, the number of penetrations of the face, and the number of the advanced horizontal drilling hole, and mark the number of the digital core collected this time;

[0017] The digital surrounding rock coring equipment enters the hole, the video acquisition device is placed in the advanced horizontal borehole, the video acquisition device is started to make it move forward at a constant speed in the advanced horizontal borehole, and the state in the hole and the operation of the video acquisition device are observed by checking the returned data;

[0018] When the depth is reached, the cable is recovered. After the video acquisition device runs to the maximum depth of the horizontal drilling and records it, the tensile cable is recovered by the reel, and the video acquisition device is pulled back at a uniform speed inside the advanced horizontal drilling hole;

[0019] Digital surrounding rock acquisition: Digital surrounding rock acquisition is performed during the process of the camera acquisition device being pulled back at a uniform speed, and the digital surrounding rock image data of the borehole acquired by the camera acquisition device is transmitted back to the control device in real time for storage;

[0020] The digital surrounding rock coring equipment exits the hole, the video acquisition device is pulled out of the advanced horizontal drilling hole, and the reel, camera, and searchlight are turned off;

[0021] Data storage and footage calibration, matching digital surrounding rock image data with depth footage coordinates, and storing them in the digital surrounding rock database;

[0022] Cyclic acquisition: the digital surrounding rock image data of all advanced horizontal boreholes on the same tunnel face are acquired and stored in sequence according to the above steps.

[0023] In the tunnel advance horizontal drilling step, 3 to 7 drilling points are evenly arranged on the same face, and an advance horizontal drilling rig and a three-arm drilling rig are used to perform advance horizontal drilling at the drilling points.

[0024] The depth of the advanced horizontal drilling is 30 to 150 m.

[0025] In the data storage and footage calibration steps, the digital surrounding rock database adopts a tree-like hierarchical model; the first level is classified according to different tunnel names; the second level is classified according to the face footage, including the digital rock cores of advanced horizontal drilling under different face footages; the third level is classified according to the cores, including the digital rock cores of the same face and different advanced horizontal drillings; the fourth level is classified according to the depth footage, including the digital core images corresponding to different depth footages in the same borehole, which can be spliced ​​into a complete digital rock core of advanced horizontal drilling.

[0026] Beneficial effects of the present invention:

[0027] (1) The application scenario of the digital surrounding rock coring equipment for advanced horizontal drilling in the present invention is the advanced horizontal drilling site at the tunnel construction face. The digital coring is performed and retained through the camera acquisition device 1, which reduces the difficulty and work intensity of surrounding rock coring, and is suitable for horizontal drilling with different borehole diameters and geological conditions;

[0028] (2) Through the digital surrounding rock coring method, the corresponding relationship between the advanced horizontal drilling footage and the digital surrounding rock is established, and a digital surrounding rock database for the entire tunnel is established to enhance the control and analysis of geological data. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the use status of the digital surrounding rock coring equipment for advanced horizontal drilling in the present invention.

[0030] Figure 2 It is a structural schematic diagram of the video acquisition device in the present invention.

[0031] Figure 3 It is a structural schematic diagram of the digital surrounding rock coring equipment used for advanced horizontal drilling in the present invention.

[0032] Figure 4 The present invention is a method flow chart of the digital surrounding rock coring method for supporting advanced horizontal drilling in the present invention.

[0033] Figure 5 This is a flow chart for establishing the digital surrounding rock database in the present invention.

[0034] Figure 6 This is a structural diagram of the digital surrounding rock database in the present invention. DETAILED DESCRIPTION

[0035] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present invention and its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete and to fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, rather than as limitations.

[0036] The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] like Figures 1 to 3As shown, the digital surrounding rock coring equipment supporting advanced horizontal drilling includes a video acquisition device 1, one end of the video acquisition device 1 is provided with a tensile cable 2 for power supply and data transmission, and the end of the tensile cable 2 away from the video acquisition device 1 is connected to a control device 3; the video acquisition device 1 has a shell 11, and a camera 12 is centrally arranged at the end of the shell 11 away from the tensile cable 2, and a plurality of searchlights 13 are evenly arranged at the end of the shell 11 around the camera 12, and a driving wheel 14 and a driving driving wheel are rotatably arranged in the shell 11. 14 is a driving motor for moving; the control device 3 has a control mainboard 33, a built-in battery 34 and a reel 31, the control mainboard 33 is connected to the camera 12, the searchlight 13 and the driving motor through the tensile cable 2, the built-in battery 34 is used to supply power to the control device 3 and the camera acquisition device 1, the reel 31 is used to reel or release the tensile cable 2, the reel 31 has an encoder 32, the encoder 32 is used to obtain the incoming and reeling lengths of the tensile cable 2; the digital surrounding rock coring device of the supporting advanced horizontal drilling in this embodiment The application scenario of the equipment is the advanced horizontal drilling site at the tunnel construction face. The digital coring is carried out and retained through the video acquisition device 1, which reduces the difficulty and work intensity of coring the surrounding rock, and is suitable for horizontal drilling with different borehole diameters and geological conditions. After the horizontal hole is completed, the video acquisition device 1 is placed in the advanced horizontal borehole, and the driving motor drives the driving wheel 14 to rotate, so that the video acquisition device 1 moves in the advanced horizontal borehole and reaches the desired coring depth. Through the digital surrounding rock coring method, the corresponding relationship between the advanced horizontal drilling footage and the digital surrounding rock is established, and the digital surrounding rock database of the entire tunnel is established to enhance the control and judgment of geological data. The camera 12, the searchlight 13, and the drive motor are connected to the control device 3 by the tensile cable 2 to realize power supply and data transmission. The tensile cable 2 can transmit current and image data in real time. The camera 12 starts to collect digital core images, and at the same time, the reel 31 of the rear control device 3 pulls the video acquisition device 1 back at a uniform speed. In this process, the digital core images collected are transmitted to the control device 3 in real time and stored. The searchlight 13 has a uniform lighting effect, ensuring that there is no shadow, no dead angle, and no exposure in the advanced horizontal drilling hole.

[0038] In the above embodiment, the driving motor adopts a DC motor, which can output sufficient torque to drive the active wheel to rotate at a uniform and stable speed, with an obstacle crossing capability greater than 2 cm, and the active wheel has sufficient friction to cope with the smooth wall and water seepage in the advanced horizontal drilling hole; the reel 31 is powered by a built-in battery 34, and can be flexibly moved to the height position of the advanced horizontal drilling hole with the bracket to ensure that the tensile cable 2 and the camera acquisition device 1 are in a straight line; the input end of the encoder 31 rotates synchronously with the reel 32, and the encoder 31 is connected to the control main board 33. The encoder 31 is powered by the built-in battery 34, and can detect the rotation angle of the reel 32 in real time, and return data to the control main board 33; the control main board 33 is connected to the tensile cable 2 and the encoding wheel 32, and is powered by the built-in battery 33. The control main board 33 has a built-in control program, which can view the data feedback from the camera acquisition device 1 and the encoder 31 in real time, and has a built-in correlation calculation method between the two.

[0039] In some embodiments, at least three hinge seats 16 are arranged in a circular array on the outer side of the end of the shell 11 facing away from the camera 12, and a support arm 17 is elastically hinged on the hinge seat 16. A driven wheel 15 is rotatably provided on the end of the support arm 17 facing away from the hinge seat 16; an elastic force can be applied between the support arm 17 and the hinge seat 16 through a torsion spring, so that the support arm 17 has a tendency to rotate outward under the action of the elastic force, and when the video acquisition device 1 is inside the advance horizontal drilling hole, the driven wheel 15 can maintain contact with the inner wall of the advance horizontal drilling hole under the action of the elastic force, thereby ensuring the stability of the video acquisition device 1, meeting the needs of overcoming obstacles in the hole and adapting to different advance horizontal drilling hole diameters within a certain range.

[0040] In some embodiments, a charging interface and a data transmission interface are provided on the control main board 33. The charging interface is used to charge the built-in battery 34, and the data transmission interface is used to control data transmission between the main board 33 and external devices.

[0041] In some embodiments, the camera 12 is a high-definition wide-angle camera with a pixel count of no less than 5 million. The camera is waterproof and has optical image stabilization functions and can be adjusted to a reasonable focal length that is suitable for the aperture of the horizontal drilling hole. The outer sides of the camera 12 and the searchlight 13 are made of a high-strength, lightweight carbon fiber shell. The structure of the video acquisition device 1 and the interfaces of its components are explosion-proof, pressure-resistant, and waterproof, and can cope with harsh working environments such as moisture, water seepage, and high temperature in advanced horizontal drilling holes.

[0042] In some embodiments, the tensile strength of the tensile cable 2 is not less than 30 Mpa, the tensile cable 2 includes a power line, a data line and a fiber-reinforced material, and the cable and the connector are waterproof.

[0043] In some embodiments, the built-in battery 34 is a 50,000 mAh lithium battery, which can provide 24 hours of device operation time.

[0044] In some embodiments, Figure 4 and 5 As shown, a digital surrounding rock coring method supporting advanced horizontal drilling is also disclosed, comprising the following steps:

[0045] Tunnel advance horizontal drilling: conduct advance horizontal drilling on the heading face where advance horizontal drilling is required, and observe the hole quality and hole status. The advance horizontal drilling construction should strictly control the hole quality, ensure the hole level, control the torque and speed during the drilling process, and check the wall collapse, drill jam, etc.

[0046] Create a new engineering file according to the name of the construction tunnel, the number of penetrations of the face, and the number of the advanced horizontal drilling hole, and mark the number of the digital core collected this time;

[0047] The digital surrounding rock coring equipment enters the hole, and the camera acquisition device is placed in the advanced horizontal borehole. The camera acquisition device is started to move forward at a constant speed in the advanced horizontal borehole. At this time, the encoder 32 records the rotation data and transmits it to the control mainboard 33. There is no need for coring image acquisition. The state in the hole and the operation of the camera acquisition device can be observed by checking the returned data;

[0048] When the depth is reached, the cable is recovered. After the video acquisition device runs to the maximum depth of the horizontal drilling and records it, the tensile cable is recovered through the reel, and the video acquisition device is pulled back at a uniform speed inside the advanced horizontal drilling hole. At this time, the coring image acquisition state is turned on;

[0049] Digital surrounding rock acquisition: Digital surrounding rock acquisition is performed during the process of the camera acquisition device being pulled back at a uniform speed, and the digital surrounding rock image data of the borehole acquired by the camera acquisition device is transmitted back to the control device in real time for storage;

[0050] The digital surrounding rock coring equipment exits the hole, the video acquisition device is pulled out of the advanced horizontal drilling hole, and the reel, camera, and searchlight are turned off;

[0051] Data storage and footage calibration, matching digital surrounding rock image data with depth footage coordinates, and storing them in the digital surrounding rock database;

[0052] Cyclic acquisition: the digital surrounding rock image data of all advanced horizontal boreholes on the same tunnel face are acquired and stored in sequence according to the above steps.

[0053] In some embodiments, in the tunnel advance horizontal drilling step, 3 to 7 drilling points are evenly arranged on the same heading, and an advance horizontal drilling rig and a three-arm drilling rig are used to perform advance horizontal drilling at the drilling points.

[0054] In some embodiments, the depth of the advanced horizontal drilling is 30-150 m.

[0055] In some embodiments, Figure 5 As shown in the figure, in the data storage and footage calibration steps, the digital surrounding rock database adopts a tree-like hierarchical model; the first level is classified according to different tunnel names; the second level is classified according to the face footage, including the digital rock cores of the advanced horizontal drilling under different face footages; the third level is classified according to the cores, including the digital rock cores of the same face and different advanced horizontal drillings; the fourth level is classified according to the depth footage, including the digital core images corresponding to different depth footages in the same borehole, which can be spliced ​​into a complete digital rock core of the advanced horizontal drilling.

[0056] In the above embodiment, when the accuracy is satisfied, the image can be expanded, calibrated and spliced ​​according to the depth coordinates by image processing to obtain a drilling histogram of the advanced horizontal drilling.

[0057] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0058] The above-mentioned embodiments only express some implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A digital surrounding rock coring device for advanced horizontal drilling, characterized in that: It comprises a video acquisition device, one end of which is provided with a tensile cable for power supply and data transmission, and the end of the tensile cable away from the video acquisition device is connected with a control device; The video acquisition device has a shell, a camera is centrally arranged at one end of the shell away from the tensile cable, a plurality of searchlights are evenly arranged around the camera at the end of the shell, and a driving wheel and a driving motor for driving the driving wheel to move are rotatably arranged in the shell; The control device has a control mainboard, a built-in battery and a cable reel. The control mainboard is connected to the camera, the searchlight and the drive motor respectively through anti-tension cables. The built-in battery is used to supply power to the control device and the video acquisition device. The cable reel is used to reel or release the anti-tension cable. The cable reel has an encoder, and the encoder is used to obtain the incoming and reeling lengths of the anti-tension cable.

2. The digital surrounding rock coring equipment for advanced horizontal drilling according to claim 1 is characterized in that: At least three hinge seats are arranged in a circular array on the outer side of one end of the shell away from the camera, a support arm is elastically hinged on the support seat, and a driven wheel is rotatably arranged on one end of the support arm away from the hinge seat.

3. The digital surrounding rock coring equipment for advanced horizontal drilling according to claim 1 is characterized in that: The control mainboard is provided with a charging interface and a data transmission interface.

4. The digital surrounding rock coring equipment for advanced horizontal drilling according to claim 1 is characterized in that: The camera is a high-definition wide-angle camera with a resolution of no less than 5 million pixels.

5. The digital surrounding rock coring equipment for advanced horizontal drilling according to claim 1 is characterized in that: The tensile strength of the tensile cable is not less than 30Mpa.

6. The digital surrounding rock coring equipment for advanced horizontal drilling according to claim 1 is characterized in that: The built-in battery is a lithium battery with a capacity of 50,000 mAh.

7. A digital surrounding rock coring method for advanced horizontal drilling, characterized in that: The following steps are involved: Tunnel advance horizontal drilling: conduct advance horizontal drilling at the heading face where advance horizontal drilling is required, and observe the quality of the hole and the status inside the hole; Create a new engineering file according to the name of the construction tunnel, the number of penetrations of the face, and the number of the advanced horizontal drilling hole, and mark the number of the digital core collected this time; The digital surrounding rock coring equipment enters the hole, the video acquisition device is placed in the advanced horizontal borehole, the video acquisition device is started to make it move forward at a constant speed in the advanced horizontal borehole, and the state in the hole and the operation of the video acquisition device are observed by checking the returned data; When the depth is reached, the cable is recovered. After the video acquisition device runs to the maximum depth of the horizontal drilling and records it, the tensile cable is recovered by the reel, and the video acquisition device is pulled back at a uniform speed inside the advanced horizontal drilling hole; Digital surrounding rock acquisition: Digital surrounding rock acquisition is performed during the process of the camera acquisition device being pulled back at a uniform speed, and the digital surrounding rock image data of the borehole acquired by the camera acquisition device is transmitted back to the control device in real time for storage; The digital surrounding rock coring equipment exits the hole, the video acquisition device is pulled out of the advanced horizontal drilling hole, and the reel, camera, and searchlight are turned off; Data storage and footage calibration, matching digital surrounding rock image data with depth footage coordinates, and storing them in the digital surrounding rock database; Cyclic acquisition: the digital surrounding rock image data of all advanced horizontal boreholes on the same tunnel face are acquired and stored in sequence according to the above steps.

8. The digital surrounding rock coring method for advanced horizontal drilling according to claim 7 is characterized in that: In the tunnel advance horizontal drilling step, 3 to 7 drilling points are evenly arranged on the same face, and an advance horizontal drilling rig and a three-arm drilling rig are used to perform advance horizontal drilling at the drilling points.

9. The digital surrounding rock coring method for advanced horizontal drilling according to claim 7 is characterized in that: The depth of the advanced horizontal drilling is 30 to 150 m.

10. The digital surrounding rock coring method for advanced horizontal drilling according to claim 7 is characterized in that: In the data storage and footage calibration steps, the digital surrounding rock database adopts a tree-like hierarchical model; the first level is classified according to different tunnel names; the second level is classified according to the face footage, including the digital rock cores of advanced horizontal drilling under different face footages; the third level is classified according to the cores, including the digital rock cores of the same face and different advanced horizontal drillings; the fourth level is classified according to the depth footage, including the digital core images corresponding to different depth footages in the same borehole, which can be spliced ​​into a complete digital rock core of advanced horizontal drilling.

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