A coring device and method for geological drilling
By designing a core extraction device for geological drilling including telescopic cylinders, drive components and core extraction components, the problems of core breakage and excessive torque in traditional core extraction devices are solved, and the complete acquisition of the core and the reduction of the torque of the rotating shell are achieved.
Patent Information
- Application Number
- CN202510048474.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-04-04
AI Technical Summary
Traditional core extraction devices create friction between the rotating shell and the core, causing the core to break and increase the torque of the rotating shell, which may lead to drilling loss.
A core extraction device for geological drilling is designed, including a telescopic cylinder, a driving member and a core extraction member. Through the rotating connection between the rotating shell and the core extraction cylinder, the core core is avoided from contacting directly with the rotating shell, and a groove and a fixing member are provided on the inner wall of the core extraction cylinder to reduce friction.
It effectively avoids the rock core breakage, reduces the torque of the rotating shell, prevents drilling and improves drilling progress and hole formation quality.
Smart Images
Figure CN119754722A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of geological drilling, and in particular relates to a coring device and method for geological drilling. Background Art
[0002] Geological drilling refers to a geological engineering survey that uses certain drilling machinery and equipment and processes to obtain rock and mineral cores below the surface to make reliable evaluations of geological and mineral resource parameters. Drilling is an important technical means in geological exploration. Geological core drilling technology involves various industrial sectors such as geology, metallurgy, coal, nonferrous metals, nuclear industry, chemical industry, and building materials. It includes technical aspects such as drilling engineering design, drilling methods, and drilling equipment. When conducting geological drilling and engineering surveys, a drill rig is used to drill downward from the surface to form a cylindrical borehole in the stratum to identify and divide the stratum. At this time, a coring tube is often used to coring the rock and soil layers, so as to obtain rock cores, ore samples, and soil samples at different depths for analysis and research.
[0003] The traditional coring device uses the core tube to drive the drill bit to cut the rock and soil, and then the core enters the core tube. Since the core does not rotate, but the core tube needs to rotate at high speed, there will be friction between the inner wall of the core tube and the core, which can easily cause the core to break and make it impossible to obtain a complete core. At the same time, the core breakage will increase the friction between the core tube and the core fragments, thereby increasing the torque of the core tube. Once the torque of the core tube exceeds the strength that its material can bear, the connection between the core tube and the drill rod will be damaged. When the damage is serious, it will directly cause the core tube to separate from the drill rod, causing the drill to fall off, which will greatly affect the drilling progress and the quality of the hole, not only causing waste of exploration materials, but also affecting the construction progress and increasing the construction difficulty of the project. Summary of the invention
[0004] In order to solve the above technical problems, the present invention provides a coring device for geological drilling, which can avoid friction between the rotating shell and the core to prevent the core from breaking, and can also reduce the torque of the rotating shell to avoid the phenomenon of drill falling.
[0005] The technical solution includes a telescopic cylinder, a driving component and a coring component. The driving component is connected to the telescopic cylinder, the telescopic cylinder drives the driving component to move, the coring component is connected to the driving component, the driving component drives the coring component to rotate for coring, the driving component includes a cylindrical driving shell, a motor and a rotating disk, the motor is arranged inside the driving shell, the rotating disk is rotatably connected to one end of the driving shell, the transmission shaft of the motor is connected to the rotating disk through a sleeve, so that the rotating disk rotates in the driving shell, the coring component includes a cylindrical rotating shell, a cylindrical coring barrel and a drill bit, one end of the rotating shell is connected to the rotating disk through a connecting piece, the rotating disk drives the rotating shell to rotate, the coring barrel is located inside the rotating shell, and the coring barrel is rotatably connected to the rotating shell, the drill bit is arranged at one end of the rotating shell away from the rotating disk, and the inner diameter of the drill bit is smaller than the inner diameter of the coring barrel.
[0006] Furthermore, a plurality of grooves are provided on the inner wall of the core barrel, and fixing parts are provided in the grooves one by one. Each fixing part includes a first spring, a base and a pulley. The pulley is arranged on the base, and the base is slidably connected in the groove so that the base can move in the groove. The first spring is located between the bottom surface of the groove and the base.
[0007] Furthermore, a plurality of grooves are arranged along the height direction of the coring barrel, and at least three grooves are arranged at equal intervals in the circumferential direction of the coring barrel at the same height.
[0008] Furthermore, a rubber ring is sleeved on the pulley to reduce the influence of the vibration of the rotating shell on the rock core when the rotating shell rotates.
[0009] Furthermore, a pressure sensor is provided on the inner wall of one side of the sleeve connected to the motor drive shaft, and the pressure sensor is in communication connection with the telescopic cylinder. A sliding column is provided on the coring component, one end of the sliding column is located in the coring barrel, and the other end passes through the coring barrel, the rotating shell and the rotating disk in sequence and extends into the sleeve, and the sliding column is in gap with the coring barrel, the rotating shell and the rotating disk. When the core squeezes the sliding column, the sliding column moves upward until it squeezes the pressure sensor, and the telescopic cylinder stops working according to the pressure signal of the pressure sensor.
[0010] Furthermore, a lock and a cutting assembly are provided on the rotating shell, and a lock groove is provided around the sliding column at the end surface of the rotating shell that is in clearance with the sliding column, and a channel is provided inside the side wall of the rotating shell. The lock is provided in the lock groove, and the lock cooperates with the sliding column, and the sliding column rises to drive the lock to open, and the lock is connected to one end of the steel wire. The cutting assembly includes a cutting shell, a second spring, a knife seat and a blade, the cutting shell is located between the drill bit and the coring barrel, and the cutting shell is connected to the inner wall of the rotating shell, the blade is fixed on the knife seat, the knife seat is slidably provided in the cutting shell, and the second spring is located between the side wall of the cutting shell close to the rotating shell and the knife seat, the other end of the steel wire passes through the channel, the side wall of the cutting shell and the second spring in sequence and is connected to the knife seat, and an opening is provided at one end of the cutting shell away from the rotating shell, and the opening allows the blade to enter and exit. When the core squeezes the sliding column, the sliding column moves upward to open the lock, and the knife seat moves away from the rotating shell under the squeezing action of the second spring, so that the blade retracts the cutting shell, and rotates under the drive of the rotating shell to cut the core along the circumferential direction of the core.
[0011] Furthermore, a torque sensor is provided in the drive housing, the torque sensor is connected to the motor, and the torque sensor is sleeved on the motor output shaft. The torque sensor detects the torque change of the motor output shaft in real time, and the motor adjusts the power of the motor according to the torque change signal transmitted by the torque sensor.
[0012] The present invention also provides a coring method for geological drilling, comprising the following steps:
[0013] S100: When coring, the motor is started to rotate the rotating housing to drive the drill bit to rotate, and the piston rod of the telescopic cylinder is extended to make the drill bit contact with the rock and soil, and the rock and soil are cut by the drill bit;
[0014] S200: The rock core generated after the drill bit cuts moves into the coring barrel, and the rock core restricts the rotation of the coring barrel. The rotating shell continues to rotate to drive the drill bit to cut the rock and soil.
[0015] The technical solution provided by the embodiment of the present invention has the following advantages compared with the prior art:
[0016] When coring with the device of the present invention, the motor is started to rotate the rotating shell to drive the drill bit to rotate, the piston rod of the telescopic cylinder is extended, the drill bit is contacted with rock and soil, the rock and soil are cut by the drill bit, and the core produced after the drill bit cutting moves into the coring barrel, and the core limits the rotation of the coring barrel, which can avoid the core directly contacting the rotating shell and prevent the core from being broken. At the same time, since the coring barrel is rotatably connected to the rotating shell, the torque of the rotating shell will not be increased. The present invention can avoid friction between the rotating shell and the core, prevent the core from being broken, and can also reduce the torque of the rotating shell to avoid the phenomenon of drill falling.
[0017] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 It is a schematic diagram of the overall structure of one embodiment of the present invention;
[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle;
[0021] Figure 3 for Figure 1 Enlarged view of point B in the middle;
[0022] Figure 4 for Figure 1 Enlarged view of center C.
[0023] Reference numerals:
[0024] 1. Telescopic cylinder; 2. Driving housing; 3. Motor; 4. Rotating disk; 5. Rotating housing; 6. Coring barrel; 7. Drill bit; 8. Groove; 9. First spring; 10. Base; 11. Pulley; 12. Pressure sensor; 13. Sliding column; 14. Sleeve; 15. Lock; 16. Steel wire; 17. Cutting housing; 18. Second spring; 19. Knife holder; 20. Blade; 21. Torque sensor; 22. Connector. DETAILED DESCRIPTION
[0025] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.
[0026] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0027] In the description of the embodiments of the present invention, unless otherwise specified, “plurality” means two or more.
[0028] like Figures 1 to 4 As shown, the present invention provides a coring device for geological drilling, comprising a telescopic cylinder 1, a driving component and a coring component, the driving component is connected to the telescopic cylinder 1, the telescopic cylinder 1 drives the driving component to move, the coring component is connected to the driving component, the driving component drives the coring component to rotate for coring, the driving component comprises a cylindrical driving shell 2, a motor 3 and a rotating disk 4, the motor 3 is arranged inside the driving shell 2, the rotating disk 4 is rotatably connected to one end of the driving shell 2, the transmission shaft of the motor 3 is connected to the rotating disk 4 through a sleeve 14, so that the rotating disk 4 rotates in the driving shell 2, the coring component comprises a cylindrical rotating shell 5, a cylindrical coring barrel 6 and a drill bit 7, one end of the rotating shell 5 is connected to the rotating disk 4 through a connecting piece 22, the rotating disk 4 drives the rotating shell 5 to rotate, the coring barrel 6 is located inside the rotating shell 5, and the coring barrel 6 is rotatably connected to the rotating shell 5, and the drill bit 7 is arranged at one end of the rotating shell 5 away from the rotating disk 4.
[0029] When coring, the motor 3 is started to rotate the rotating shell 5 to drive the drill bit 7 to rotate, the piston rod of the telescopic cylinder 1 is extended, the drill bit 7 is in contact with the rock and soil, the drill bit 7 is used to cut the rock and soil, and the core produced after the drill bit 7 cuts moves into the coring barrel 6. The core limits the rotation of the coring barrel 6, which can avoid the core directly contacting the rotating shell 5 and prevent the core from breaking. At the same time, since the coring barrel 6 is rotatably connected to the rotating shell 5, the torque of the rotating shell 5 will not be increased. The present invention can avoid friction between the rotating shell 5 and the core, prevent the core from breaking, and can also reduce the torque of the rotating shell 5 to avoid the phenomenon of drill falling.
[0030] Optionally, the core barrel 6 and the rotating shell 5 are rotatably connected via a bearing.
[0031] Furthermore, the inner diameter of the drill bit 7 is smaller than the inner diameter of the coring barrel 6 , so that the cut core can enter the coring barrel 6 easily.
[0032] In the embodiment provided by the present invention, a plurality of grooves 8 are provided on the inner wall of the core barrel 6, and fixing parts are provided in the grooves 8 one by one. Each fixing part includes a first spring 9, a base 10 and a pulley 11. The pulley 11 is arranged on the base 10, and the base 10 is slidably connected in the groove 8 so that the base 10 moves in the groove 8. The first spring 9 is located between the bottom surface of the groove 8 and the base 10.
[0033] It can be understood that since the inner diameter of the drill bit 7 is smaller than the inner diameter of the coring barrel 6, there is a gap between the core and the coring barrel 6, and the coring device rotates at high speed during drilling and coring, causing the rotating shell 5 to not move linearly, which can easily cause the coring barrel 6 to hit the core from time to time, and the spring of the fixing part can play a buffering role to avoid the collision between the core and the coring barrel 6. The guide wheel can limit the core and facilitate the core to enter the coring barrel 6.
[0034] In the embodiment provided by the present invention, a plurality of grooves 8 are arranged along the height direction of the coring barrel 6, and at least three grooves 8 are arranged at equal intervals in the circumferential direction of the coring barrel 6 at the same height.
[0035] It can be understood that at least three equal-spaced arrangements in the circumferential direction are intended to prevent uneven force on the core due to the presence of a fixing member on one side and no fixing member on the other side, which may cause the core to collide with the coring barrel 6 .
[0036] In the embodiment provided by the present invention, a rubber ring is sleeved on the pulley 11, and the rubber ring reduces the influence of the vibration of the rotating shell 5 on the rock core when rotating.
[0037] It can be understood that the rotating shell 5 will generate vibration when rotating at a high speed, thereby causing the core barrel 6 and the fixing member to vibrate, so a rubber ring is provided to reduce vibration.
[0038] In the embodiment provided by the present invention, a pressure sensor 12 is provided on the inner wall of the side where the sleeve 14 is connected to the transmission shaft of the motor 3, and the pressure sensor 12 is in communication connection with the telescopic cylinder 1. A sliding column 13 is provided on the coring component, and one end of the sliding column 13 is located in the coring barrel 6, and the other end sequentially passes through the coring barrel 6, the rotating shell 5 and the rotating disk 4 and extends into the sleeve 14, and the sliding column 13 is in clearance fit with the coring barrel 6, the rotating shell 5 and the rotating disk 4. When the core squeezes the sliding column 13, the sliding column 13 moves upward until it squeezes the pressure sensor 12, and the telescopic cylinder 1 stops working according to the pressure signal of the pressure sensor 12.
[0039] In the embodiment provided by the present invention, a lock 15 and a cutting assembly are provided on the rotating shell 5, a lock groove is provided around the sliding column 13 on the end surface of the rotating shell 5 which is gap-fitted with the sliding column 13, and a channel is provided inside the side wall of the rotating shell 5. The lock buckle 15 is arranged in the lock buckle groove, and the lock buckle 15 cooperates with the sliding column 13. The sliding column 13 rises to drive the lock buckle 15 to open. The lock buckle 15 is connected to one end of the steel wire 16. The cutting assembly includes a cutting shell 17, a second spring 18, a knife seat 19 and a blade 20. The cutting shell 17 is located between the drill bit 7 and the core barrel 6, and the cutting shell 17 is connected to the inner wall of the rotating shell 5. The blade 20 is fixed on the knife seat 19. The knife seat 19 is slidably arranged in the cutting shell 17, and the second spring 18 is located between the side wall of the cutting shell 17 close to the rotating shell 5 and the knife seat 19. The other end of the steel wire 16 passes through the channel, the side wall of the cutting shell 17 and the second spring 18 in sequence to be connected to the knife seat 19. An opening is provided at the end of the cutting shell 17 away from the rotating shell 5 to allow the blade 20 to enter and exit.
[0040] It can be understood that after the coring is completed, the core is often broken and left in the borehole due to factors such as the low tensile strength of the core and improper operation when the core is taken out. Therefore, when the preset coring depth is reached, the core will squeeze the sliding column 13, and the sliding column 13 will move upward to open the lock 15. The knife seat 19 will move away from the rotating shell 5 under the squeezing action of the second spring 18, so that the blade 20 can retract the cutting shell 17, and rotate under the drive of the rotating shell 5 to cut the core along the circumferential direction of the core.
[0041] In the embodiment provided by the present invention, a torque sensor 21 is provided in the driving housing 2, the torque sensor 21 is connected to the motor 3, and the torque sensor 21 is sleeved on the output shaft of the motor 3. The torque sensor 21 detects the torque change of the output shaft of the motor 3 in real time, and the motor 3 adjusts the power of the motor 3 according to the torque change signal transmitted by the torque sensor 21.
[0042] It can be understood that in a complex geological environment, rock strata often show heterogeneity (different rock strata have significant lithological effects) and contain cracks, faults, etc., which requires continuous adjustment of the driving torque during the drilling and coring process. Therefore, the torque sensor 21 is used to detect the torque of the drive shaft of the motor 3 to adjust the power of the motor 3, thereby adjusting the driving force to meet different geological conditions.
[0043] The present invention also provides a coring method for geological drilling, comprising the following steps:
[0044] The coring method of the present invention is as follows: when coring, the motor 3 is started to rotate the rotating shell 5 to drive the drill bit 7 to rotate, the piston rod of the telescopic cylinder 1 is extended, the drill bit 7 is brought into contact with the rock and soil, and the rock and soil are cut by the drill bit 7.
[0045] The core produced after cutting by the drill bit 7 moves into the coring barrel 6, and the guide wheel in the coring barrel 6 assists the core to enter the coring barrel 6. The guide wheel can apply force to the core through the first spring 9 to prevent the core from colliding with the coring barrel 6. At the same time, the core limits the rotation of the coring barrel 6 through the guide wheel, and the rotating shell 5 continues to rotate to drive the drill bit 7 to cut rock and soil.
[0046] During the coring process, the torque sensor detects the torque of the drive shaft of the motor 3 to adjust the power of the motor 3, thereby adjusting the driving torque. When the coring is completed, the core will hit the sliding column 13, causing the sliding column 13 to move upward to press the pressure sensor 12 and open the lock 15.
[0047] When the pressure sensor 12 is pressed, the telescopic cylinder 1 stops working according to the pressure signal of the pressure sensor 12 to avoid further movement in the rock and soil. When the lock 15 is opened, the steel wire 16 has no pressure on the knife seat 19. At this time, the second spring 18 squeezes the knife seat 19 to move, so that the blade 20 extends out of the opening of the cutting shell 17, and rotates under the drive of the rotating shell 5 to cut the core along the circumferential direction of the core, which is convenient for separating the core from the rock and soil. At the same time, the blade 20 also has a supporting function to prevent the core from falling from the coring barrel 6 when pulling out the drill hole.
[0048] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.
[0049] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily realized. Therefore, without departing from the general concept defined by the claims and equivalent scope, the present invention is not limited to the specific details and the illustrations shown and described here.
Claims
1. A coring device for geological drilling, characterized in that: It comprises a telescopic cylinder (1), a driving component and a coring component, wherein the driving component is connected to the telescopic cylinder (1), the telescopic cylinder (1) drives the driving component to move, the coring component is connected to the driving component, and the driving component drives the coring component to rotate and coring; The driving component comprises a cylindrical driving housing (2), a motor (3) and a rotating disk (4); the motor (3) is arranged inside the driving housing (2); the rotating disk (4) is rotatably connected to one end of the driving housing (2); a transmission shaft of the motor (3) is connected to the rotating disk (4) via a sleeve (14) so that the rotating disk (4) rotates inside the driving housing (2); The coring component comprises a cylindrical rotating shell (5), a cylindrical coring barrel (6) and a drill bit (7); one end of the rotating shell (5) is connected to the rotating disk (4) via a connecting piece (22); the rotating disk (4) drives the rotating shell (5) to rotate; the coring barrel (6) is located inside the rotating shell (5), and the coring barrel (6) is rotatably connected to the rotating shell (5); and the drill bit (7) is arranged at one end of the rotating shell (5) away from the rotating disk (4).
2. A coring device for geological drilling according to claim 1, characterized in that: Furthermore, the inner diameter of the drill bit (7) is smaller than the inner diameter of the coring barrel (6).
3. A coring device for geological drilling as claimed in claim 1, characterized in that: The inner wall of the core-taking barrel (6) is provided with a plurality of grooves (8), and fixing pieces are provided in the grooves (8) in a one-to-one correspondence; Each of the fixing members comprises a first spring (9), a base (10) and a pulley (11); the pulley (11) is arranged on the base (10); the base (10) is slidably connected in the groove (8) so that the base (10) moves in the groove (8); and the first spring (9) is located between the bottom surface of the groove (8) and the base (10).
4. A coring device for geological drilling as claimed in claim 3, characterized in that: A plurality of the grooves (8) are arranged along the height direction of the coring barrel (6), and at least three grooves (8) are arranged at equal intervals in the circumferential direction of the coring barrel (6) at the same height.
5. A coring device for geological drilling as claimed in claim 3, characterized in that: The pulley (11) is sleeved with a rubber ring, and the rubber ring reduces the influence of the vibration of the rotating shell (5) when rotating on the rock core.
6. A coring device for geological drilling as claimed in claim 3, characterized in that: A pressure sensor (12) is provided on the inner wall of one side of the sleeve (14) connected to the transmission shaft of the motor (3), and the pressure sensor (12) is communicatively connected to the telescopic cylinder (1). A sliding column (13) is provided on the coring component, and one end of the sliding column (13) is located in the coring barrel (6), and the other end passes through the coring barrel (6), the rotating shell (5) and the rotating disk (4) in sequence and extends into the sleeve (14), and the sliding column (13) is clearance-matched with the coring barrel (6), the rotating shell (5) and the rotating disk (4); When the rock core squeezes the sliding column (13), the sliding column (13) moves upward until it squeezes the pressure sensor (12), and the telescopic cylinder (1) stops working according to the pressure signal of the pressure sensor (12).
7. A coring device for geological drilling as claimed in claim 6, characterized in that: The rotating shell (5) is provided with a lock buckle (15) and a cutting assembly, the end surface of the rotating shell (5) and the sliding column (13) having a clearance fit is provided with a lock buckle groove around the sliding column (13), and a channel is provided inside the side wall of the rotating shell (5); The lock buckle (15) is arranged in the lock buckle groove, and the lock buckle (15) cooperates with the sliding column (13). The sliding column (13) rises to drive the lock buckle (15) to open, and the lock buckle (15) is connected to one end of the steel wire (16); The cutting assembly comprises a cutting shell (17), a second spring (18), a knife seat (19) and a blade (20); the cutting shell (17) is located between the drill bit (7) and the core barrel (6), and the cutting shell (17) is connected to the inner wall of the rotating shell (5); the blade (20) is fixed on the knife seat (19); the knife seat (19) is slidably arranged in the cutting shell (17), and the second spring (18) is located between the side wall of the cutting shell (17) close to the rotating shell (5) and the knife seat (19); the other end of the steel wire (16) passes through the channel, the side wall of the cutting shell (17) and the second spring (18) in sequence to be connected to the knife seat (19); an opening is provided at one end of the cutting shell (17) away from the rotating shell (5), and the opening allows the blade (20) to enter and exit; When the rock core squeezes the sliding column (13), the sliding column (13) moves upward to open the lock (15), and the knife seat (19) moves away from the rotating shell (5) under the squeezing action of the second spring (18), so that the blade (20) retracts the cutting shell (17) and rotates under the drive of the rotating shell (5), thereby cutting the rock core along the circumferential direction of the rock core.
8. A coring device for geological drilling as claimed in claim 1, characterized in that: A torque sensor (21) is provided in the drive housing (2), the torque sensor (21) is connected to the motor (3), and the torque sensor (21) is sleeved on the output shaft of the motor (3). The torque sensor (21) detects the torque change of the output shaft of the motor (3) in real time, and the motor (3) adjusts the power of the motor (3) according to the torque change signal transmitted by the torque sensor (21).
9. A coring method for geological drilling, using a coring device for geological drilling as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S100: When coring, the motor (3) is started to rotate the rotating housing (5) and drive the drill bit (7) to rotate, the piston rod of the telescopic cylinder (1) is extended, the drill bit (7) is brought into contact with the rock and soil, and the rock and soil are cut by the drill bit (7); S200: The rock core produced after the drill bit (7) cuts moves into the coring barrel (6), the rock core restricts the rotation of the coring barrel (6), and the rotating shell (5) continues to rotate to drive the drill bit (7) to cut rock and soil.