Rock coring drilling apparatus and coring drilling method

Abstract

The present application relates to the technical field of rock drilling, and provides a rock coring drilling device and a coring drilling method, which comprises a drilling mechanism, a first driving mechanism, a clamping mechanism and a slotting mechanism, the drilling mechanism comprises a drilling cylinder and an annular drill bit; the first driving mechanism has a first movable end, a connecting piece of the clamping mechanism is connected to the first movable end, and the slotting mechanism is used for forming an annular groove at the bottom of the rock column. The rock mass is cut in a ring shape by the annular drill bit, so that a rock column is formed in the drilling cylinder; the first driving mechanism drives the clamping mechanism to move along the axis of the drilling cylinder, so that the drill rod pierces into the rock column to form clamping; the slotting mechanism forms an annular groove at the bottom of the rock column; the first driving mechanism drives the clamping mechanism to rotate, drives the rock column to twist, and makes the rock column break along the annular groove, so as to solve the problems of low work efficiency and high labor intensity caused by manual cutting of the rock column.

Description

Technical Field

[0001] This invention relates to the field of rock drilling technology, and in particular to a rock coring drilling device and a coring drilling method. Background Technology

[0002] Currently, core sampling is commonly performed using cylindrical rock drilling equipment in mining operations. Existing cylindrical rock drilling equipment typically uses an external propulsion device to drive the drill barrel to rotate, and then uses a ring drill bit to drill into the rock mass in a ring shape, thereby forming a cylindrical rock column inside the drill barrel.

[0003] However, after drilling is completed, the bottom of the rock column formed inside the drill barrel often remains connected to the rock mass, making it difficult to remove completely. Traditional methods often rely on manual labor or auxiliary tools for secondary cutting, which is not only inefficient and labor-intensive but also poses significant safety risks during the cutting process. Summary of the Invention

[0004] This invention provides a rock coring drilling device and a coring drilling method to solve the problems of low work efficiency and high labor intensity caused by manual cutting of rock columns.

[0005] This invention provides a rock coring drilling device, comprising: The drilling mechanism includes a drill barrel and an annular drill bit disposed at the drilling end of the drill barrel; A first drive mechanism is disposed on the drill barrel. The first drive mechanism has a first movable end, which can move along the axial direction of the drill barrel and rotate about the axis of the drill barrel. The engagement mechanism includes a connector and a plurality of drill rods. The connector is disposed inside the drill barrel, located at the assembly end of the drill barrel, and connected to the first movable end. Each drill rod is located on the side of the connector facing the annular drill bit. A grooving mechanism, located at the drilling end of the drill barrel, is used to create an annular groove at the bottom of the rock column.

[0006] According to the present invention, a rock coring drilling device is provided, wherein the grooving mechanism comprises: Multiple grooving cutters are arranged circumferentially on the drill barrel. Multiple cutter slots are opened at the drilling end of the drill barrel. Each grooving cutter is correspondingly arranged in each cutter slot. The grooving cutter can switch between a storage position and a grooving position. In the grooving position, the grooving cutter extends out of the cutter slot to contact the bottom sidewall of the rock column.

[0007] According to a rock coring drilling device provided by the present invention, the grooving mechanism further includes: A grooving drive assembly is disposed in one of the grooves to drive the rotation of the corresponding grooving cutter, thereby causing the grooving cutter to switch positions. A first synchronous drive component is used to drive the remaining grooving cutters to rotate synchronously and in the same direction when any one of the grooving cutters rotates.

[0008] According to the present invention, a rock coring drilling device is provided, wherein the slotting drive assembly includes: A lifting drive is mounted on the drill barrel and located within the cutter groove; A transmission component is connected to the cutter shaft corresponding to the grooving cutter, and a helical groove is formed on the transmission component, the helical groove extending along the axial direction of the cutter shaft; The movable component is disposed on the lifting end of the lifting drive and slides in cooperation with the spiral groove.

[0009] According to the present invention, a rock coring drilling device is provided, wherein the moving part is sleeved on the transmission part, and the inner wall of the moving part is provided with a moving block, and the moving block is embedded and cooperated with the spiral groove.

[0010] According to the present invention, a rock coring drilling device is provided, wherein each of the grooving cutters is circumferentially connected in the drill barrel to form a groove, and the first synchronous drive assembly includes: The first gear ring is rotatably disposed within the groove; Multiple first gears are provided, each first gear is respectively disposed on the cutter shaft of each grooving cutter, and each first gear meshes with the first gear ring.

[0011] According to a rock coring drilling device provided by the present invention, the engagement mechanism further includes a second synchronous drive assembly, the second synchronous drive assembly comprising: A rotary actuator is mounted on the connector, and the rotating end of the rotary actuator is provided with a drive wheel; Multiple driven wheels are provided, and each driven wheel is respectively disposed on each drill pipe; A transmission connector is used for the transmission connection between the driving wheel and each of the driven wheels.

[0012] According to the present invention, a rock coring drilling device is provided in which the annular drill bit is detachably mounted on the drill barrel.

[0013] According to a rock coring drilling device provided by the present invention, the assembly end of the drill barrel is provided with a dust discharge connector, which is used to connect a dust suction device and the inside of the drill barrel.

[0014] The present invention also provides a rock coring drilling method, applied to the aforementioned rock coring drilling equipment, the rock coring drilling method comprising: Circular drilling is performed on the rock mass to form a rock column inside the drill pipe; The drive connector moves toward the rock column and drives each drill rod to penetrate into the rock column to form an engagement with it. The drive grooving mechanism performs circumferential grooving on the bottom sidewall of the rock column to form an annular groove; The drive connector rotates to drive the rock column to rotate via each of the drill rods, causing the rock column to break along the annular groove.

[0015] This invention provides a rock coring drilling device and method, which uses an annular drill bit to perform annular cutting on the rock mass, thereby forming a rock column inside the drill barrel. A first drive mechanism drives a biting mechanism to move axially along the drill barrel, so that the drill rod penetrates the rock column and forms a biting engagement. A grooving mechanism opens an annular groove at the bottom of the rock column. The first drive mechanism drives the biting mechanism to rotate, causing the rock column to twist and break along the annular groove, thus solving the problems of low work efficiency and high labor intensity caused by manual cutting of rock columns. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the rock coring drilling equipment provided by the present invention.

[0018] Figure 2 This is a cross-sectional view of the drill barrel assembly end in the rock coring drilling equipment provided by the present invention.

[0019] Figure 3 yes Figure 2 Enlarged view of section A.

[0020] Figure 4 This is a cross-sectional view of the drilling end of the drill barrel in the rock coring drilling equipment provided by the present invention.

[0021] Figure 5 yes Figure 4 Enlarged view of section B in the middle.

[0022] Figure 6 yes Figure 4 Enlarged view of section C.

[0023] Figure 7 This is a cross-sectional view of the first toothed ring in the rock coring drilling equipment provided by the present invention.

[0024] Figure 8 This is a flowchart of the rock coring drilling method provided by the present invention.

[0025] Figure Labels 1. Drilling mechanism; 11. Drill barrel; 111. Drilling end; 112. Assembly end; 113. Cutting groove; 12. Ring drill bit; 2. First drive mechanism; 21. First moving part; 22. Second moving part; 221. First moving end; 3. Engaging mechanism; 31. Connector; 32. Drill rod; 33. Second synchronous drive assembly; 331. Rotary driver; 332. Drive wheel; 333. Driven wheel; 334. Transmission connector; 4. Slotting mechanism ; 41. Grooving cutter; 411. Cutter shaft; 42. Grooving drive assembly; 421. Lifting driver; 422. Transmission component; 423. Spiral groove; 424. Moving component; 43. First synchronous drive assembly; 431. First gear ring; 432. First gear; 5. Dust exhaust connector; 6. Mounting base; 61. Mounting slot; 7. Second drive mechanism; 71. Rotator; 72. Second gear ring; 73. Second gear; 8. First bearing housing; 9. Second bearing housing. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0027] The following is combined with Figures 1 to 7 This invention describes a rock coring drilling device, comprising a drilling mechanism 1, a first drive mechanism 2, a biting mechanism 3, and a grooving mechanism 4. The drilling mechanism 1 includes a drill barrel 11 and an annular drill bit 12. The first drive mechanism 2 is disposed on the drill barrel 11 and has a first movable end 221, which can move along the axial direction of the drill barrel 11 and rotate around the axis of the drill barrel 11. The biting mechanism 3 includes a connector 31 and a plurality of drill rods 32. The connector 31 is disposed inside the drill barrel 11, located at the assembly end 112 of the drill barrel 11, and connected to the first movable end 221. Each drill rod 32 is located on the side of the connector 31 facing the annular drill bit 12. The grooving mechanism 4 is disposed at the drilling end 111 of the drill barrel 11 and is used to create an annular groove at the bottom of the rock column.

[0028] The rock mass is cut in annular shape by the annular drill bit 12, thereby forming a rock column inside the drill barrel 11. The first drive mechanism 2 drives the biting mechanism 3 to move axially along the drill barrel 11, so that the drill rod 32 penetrates the rock column and forms a bite. The grooving mechanism 4 opens an annular groove at the bottom of the rock column. The first drive mechanism 2 drives the biting mechanism 3 to rotate, causing the rock column to twist and break along the annular groove. This solves the problem of low work efficiency and high labor intensity caused by manual cutting of rock columns, and improves the safety of core sampling operations.

[0029] The drilling mechanism 1 includes a drill barrel 11 and an annular drill bit 12 disposed at the drilling end 111 of the drill barrel 11. The drill barrel 11 has a hollow cylindrical structure, with an assembly end 112 and a drilling end 111 at its two ends, respectively. The assembly end 112 is located at the top of the drill barrel 11 and is used to connect with the second drive mechanism 7, while the drilling end 111 is located at the bottom of the drill barrel 11 and is used to contact the rock mass.

[0030] Optionally, the outer wall of the drill barrel 11 is provided with reinforcing ribs to improve its torsional stiffness and prevent deformation during drilling.

[0031] In some embodiments, the rock coring drilling equipment further includes a mounting base 6 for connecting to an external propulsion device, such as a drilling rig host. The mounting base 6 may be provided with a connecting flange or threaded interface for transmitting the thrust and torque of the external propulsion device. The mounting base 6 enables the rock coring drilling equipment to be installed on the external propulsion device.

[0032] The assembly end 112 of the drill barrel 11 is set on the mounting base 6. The drill barrel 11 is connected to the external propulsion device through the mounting base 6, thereby positioning it to the rock stratum to be drilled.

[0033] Optionally, the mounting base 6 has a mounting groove 61 inside, and the assembly end 112 of the drill barrel 11 is rotatably disposed in the mounting groove 61 via the first bearing seat 8.

[0034] like Figures 1-4 As shown, in some embodiments, the rock core drilling equipment further includes a second drive mechanism 7. The second drive mechanism 7 includes a rotator 71, a second gear ring 72, and a second gear 73. The rotator 71 is mounted on the mounting base 6, and the rotating end of the rotator 71 is connected to the second gear 73. The second gear ring 72 is coaxially fixed to the assembly end 112 of the drill barrel 11 and meshes with the second gear 73. The rotator 71 can be any component that drives the rotation of the second gear 73, such as a motor or a rotary cylinder. The rotation of the second gear 73 drives the rotation of the second gear ring 72, which in turn drives the rotation of the drill barrel 11. Through gear transmission, the transmission is smooth, the torque is large, the structure is reliable, and maintenance is convenient, ensuring the stability and accuracy of the rotation of the drill barrel 11 and providing reliable power support for drilling operations.

[0035] In some embodiments, the annular drill bit 12 is disposed at the drilling end 111 of the drill barrel 11, and the annular drill bit 12 is used to break rocks. The annular drill bit 12 can be fixedly disposed at the drilling end 111 of the drill barrel 11, or it can be detachably disposed on the drill barrel 11. In this embodiment, the annular drill bit 12 is detachably disposed on the drill barrel 11 by bolts or screws, etc., so as to facilitate the replacement of different specifications according to the hardness of the rock formation, or to replace it after wear.

[0036] In some embodiments, the first movable end 221 can move axially along the drill barrel 11 and rotate about the axis of the drill barrel 11. The movement of the first movable end 221 along the axial direction of the drill barrel 11 drives the engagement mechanism 3 to move, thereby enabling the drill rod 32 to penetrate into the rock column. The rotation of the first movable end 221 about the axis of the drill barrel 11 drives the engagement mechanism 3 to cause the rock column to twist and break.

[0037] The first drive mechanism 2 includes a first movable component 21 and a second movable component 22. The first movable component 21 is used to move axially along the drill barrel 11, and the second movable component 22 is used to rotate around the drill barrel 11. Optionally, the first movable component 21 can be a structure such as a motor and a lead screw, a cylinder, or a hydraulic cylinder; the second movable component 22 can be a motor or a rotary cylinder. In this embodiment, the first movable component 21 is a cylinder, and the second movable component 22 is a motor. The cylinder is mounted on the mounting base 6, and the piston rod of the cylinder extends into the drill barrel 11. The motor is mounted on the piston rod of the cylinder, and the output shaft of the motor is the first movable end 221.

[0038] like Figures 1-3 As shown, in some embodiments, the engagement mechanism 3 includes a connector 31 and multiple drill rods 32. The connector 31 is located inside the drill barrel 11, and its diameter is smaller than the inner diameter of the drill barrel 11, thereby ensuring the stability of the connector 31's movement. Multiple drill rods 32 are disposed on the connector 31. The number of drill rods 32 can be three, four, or more, which can be adapted to different rock conditions. To ensure the stability of the drill rods 32 penetrating the rock, each drill rod 32 is evenly spaced on the connector 31.

[0039] Optionally, the end of the drill rod 32 is a pointed tip, and the outer periphery of the drill rod 32 is provided with spiral grooves to facilitate easier penetration into the rock column during rotation. When the first drive mechanism 2 drives the connecting member 31 to move downward, the drill rod 32 penetrates the rock column under pressure; when the first drive mechanism 2 drives the connecting member 31 to rotate, the drill rod 32 drives the rock column to rotate synchronously. The mechanical engagement method of the engagement mechanism 3 can provide greater torque transmission and is less likely to damage the surface of the rock column, ensuring the integrity of the fracture surface. By forming multi-point mechanical engagement between multiple drill rods 32 and the rock column, not only can the engagement stability and torque transmission force be improved, but it can also cooperate with the annular groove to cause the rock column to fracture along the annular groove when subjected to torsion, thereby reducing slippage and irregular fracture.

[0040] like Figures 1-7 As shown, in some embodiments, the grooving mechanism 4 is disposed at the drilling end 111 of the drill barrel 11 and is used to open an annular groove at the bottom of the rock column, so that the equipment can complete the grooving operation without removing the drill barrel 11, thereby improving work efficiency and reducing the labor intensity of workers.

[0041] Specifically, the grooving mechanism 4 includes grooving cutters 41, with multiple grooving cutters 41 spaced circumferentially around the drill barrel 11. The drilling end 111 of the drill barrel 11 has multiple cutter slots 113, and each grooving cutter 41 is correspondingly positioned within its respective slot 113. The grooving cutter 41 can switch between a retracted position and a grooving position. When in the retracted position, the grooving cutter 41 is contained within the slot 113, ensuring that it does not interfere with the annular drilling operation of the drilling mechanism 1. In the grooving position, the grooving cutter 41 extends out of the slot 113 to contact the bottom sidewall of the rock column, thereby cutting the bottom sidewall of the rock column during the rotation or relative movement of the drill barrel 11 to form an annular groove. This reduces wear and collision of the grooving cutter 41 during the drilling stage and allows it to extend when core breaking is required to cut the bottom sidewall of the rock column.

[0042] Optionally, the groove 113 is a groove structure formed in the wall thickness direction of the drill barrel 11, and its shape can be adapted to the contour of the grooving cutter 41.

[0043] In some embodiments, the grooving mechanism 4 further includes a grooving drive assembly 42 and a first synchronous drive assembly 43. The grooving drive assembly 42 is disposed in one of the slots 113 and is used to drive the rotation of the corresponding grooving cutter 41 so that the grooving cutter 41 switches positions. The first synchronous drive assembly 43 is used to drive the other grooving cutters 41 to rotate synchronously and in the same direction when any grooving cutter 41 rotates. Thus, by driving the rotation of one grooving cutter 41, the synchronous rotation of multiple grooving cutters 41 can be achieved, reducing space occupation, improving the consistency of the movement of multiple grooving cutters 41, and ensuring the concentricity and uniformity of the annular groove formation. The annular groove formed thereby can provide a continuous and uniform fracture section for the subsequent torsional fracture of the rock column, thereby improving the reliability of the rock column fracturing along the predetermined position.

[0044] The slotting drive assembly 42 can be a motor, a rotary cylinder, or the like, and the first synchronous drive assembly 43 can be a linkage mechanism, a chain drive, or the like.

[0045] In some embodiments, the grooving drive assembly 42 includes a lifting driver 421, a transmission member 422, and a moving member 424. The lifting driver 421 is disposed on the drill barrel 11 and located within the cutter groove 113. The transmission member 422 is connected to the cutter shaft 411 of the corresponding grooving cutter 41, and a helical groove 423 is formed on the transmission member 422, extending axially along the cutter shaft 411. The moving member 424 is disposed on the lifting end of the lifting driver 421 and slides in cooperation with the helical groove 423. The lifting driver 421 may be a cylinder, a hydraulic cylinder, or an electric push rod, etc. In this embodiment, the lifting driver 421 is a cylinder, which is fixedly installed in the cutter groove 113. The piston rod of the cylinder extends along the axial direction of the drill barrel 11. By driving the movement of the transmission component 422, the grooving cutter 41 is driven to rotate under the action of the spiral groove 423, thereby realizing the switching of the grooving cutter 41 between the storage position and the grooving position. This achieves stable motion conversion within the limited space of the drill barrel 11, making it easier to control the unfolding angle and the storage angle of the grooving cutter 41.

[0046] Optionally, the movable component 424 is sleeved on the transmission component 422, and a movable block is provided on the inner wall of the movable component 424, which is fitted into the spiral groove 423. Thus, when the movable component 424 moves axially along the drill barrel 11 under the drive of the lifting driver 421, the movable component 424 is limited within the spiral groove 423, ensuring the stability of the rotation of the transmission component 422 and reducing the possibility of swaying or disengagement between the movable component 424 and the transmission component 422.

[0047] like Figures 1-7As shown, in some embodiments, each grooving cutter 41 is circumferentially connected in the drill barrel 11 to form a groove. The first synchronous drive assembly 43 includes a first gear ring 431 and a first gear 432. The first gear ring 431 is rotatably disposed within the groove. Multiple first gears 432 are provided, each first gear 432 being respectively disposed on the cutter shaft 411 of each grooving cutter 41, and each first gear 432 meshing with the first gear ring 431. The groove provides a placement space for the first gear ring 431, which is rotatably disposed within the groove via the second bearing seat 9. When any grooving cutter 41 rotates under the action of the grooving drive assembly 42, the first gear 432 connected to its cutter shaft 411 drives the first gear ring 431 to rotate, and the first gear ring 431 then drives the remaining first gears 432 to rotate synchronously, thereby achieving synchronous and unidirectional movement of all grooving cutters 41. This ensures transmission accuracy and guarantees the annular groove forming effect.

[0048] In some embodiments, the engagement mechanism 3 further includes a second synchronous drive assembly 33, which includes a rotary driver 331, driven wheels 333, and a transmission connector 334. The rotary driver 331 is mounted on the connector 31, and a drive wheel 332 is provided at the rotating end of the rotary driver 331. Multiple driven wheels 333 are provided, each driven wheel 333 being respectively mounted on each drill pipe 32. The transmission connector 334 is used for the transmission connection between the drive wheel 332 and each driven wheel 333. The rotary driver 331 can be, for example, a rotary cylinder or a motor. The drive wheel 332 is coaxially fixed on the output shaft of the rotary driver 331 and rotates synchronously with the output shaft. Each driven wheel 333 is respectively fixed on each drill pipe 32. Typically, the transmission connector 334 transmits the rotational power of the drive wheel 332 to each driven wheel 333, thereby driving the synchronous rotation of each drill pipe 32. Thus, by rotating synchronously through each driven wheel 333, multiple drill rods 32 rotate simultaneously and penetrate into the rock column, thereby forming a circumferentially continuous and uniformly deep annular groove on the bottom sidewall of the rock column. This makes the rock column more evenly stressed during subsequent torsion, reducing the possibility of skewed fractures, localized cracking, or fracture position displacement, and improving the controllability of the fracture position and the integrity of the extracted rock column.

[0049] Optionally, the transmission connector 334 may be a transmission chain, with both the driving pulley 332 and the driven pulley 333 being sprockets; or, the transmission connector 334 may be a transmission belt, with both the driving pulley 332 and the driven pulley 333 being pulleys.

[0050] In some embodiments, the assembly end 112 of the drill barrel 11 is provided with a dust discharge connector 5, which connects the dust collection device to the inside of the drill barrel 11. This allows for timely removal of dust generated during drilling, improving the working environment, extending equipment lifespan, and enhancing operational safety. It also reduces dust interference with drill rod 32 insertion, grooving cutter 41 unfolding, and annular groove formation, lowering the risk of jamming due to dust accumulation.

[0051] like Figures 1-7 As shown in the summary, the rock coring drilling equipment provided in this embodiment first connects the mounting base 6 to the external propulsion device and positions it to the rock stratum to be drilled. The second drive mechanism 7 is then activated, and the rotator 71 drives the second gear ring 72 to rotate via the second gear 73, thereby driving the drill barrel 11 to rotate. The external propulsion device pushes the mounting base 6 forward, and the annular drill bit 12 performs annular drilling, forming a rock column in the rock stratum. During drilling, the dust removal connector 5 connects to an external dust collection device to remove dust from inside the drill barrel 11 in real time.

[0052] After drilling is completed, the first drive mechanism 2 is activated, and the first movable part 21 pushes the connector 31 to move along the axial direction of the drill barrel 11 toward the rock column. After the connector 31 moves to the end of the rock column, the second synchronous drive assembly 33 is activated, and the rotary driver 331 drives multiple drill rods 32 to rotate synchronously through the transmission connector 334. The drill rods 32 rotate and penetrate into the rock column, achieving mechanical engagement with the rock column.

[0053] Then, the lifting drive 421 pushes the moving part 424 to move. Under the guidance of the spiral groove 423, the moving part 424 drives the grooving cutter 41 to rotate, so that the grooving cutter 41 extends out of the cutter groove 113 and contacts the side wall of the rock column. Through the first synchronous drive assembly 43, when any grooving cutter 41 rotates, it drives the remaining grooving cutters 41 to rotate synchronously until they contact the rock column. Then, through the rotation of the drill barrel 11, an annular groove is opened circumferentially on the bottom side wall of the rock column. After the annular groove is opened, the grooving cutter 41 switches to the storage position. Then, through the second moving part 22, the connecting part 31 is driven to rotate. Multiple interlocking drill rods 32 drive the rock column to rotate synchronously, so that the rock column breaks along the annular groove opened at its tail.

[0054] Finally, the rock column is contained within the drill barrel 11, and its top is engaged by the engagement mechanism 3. The drill barrel 11 can then be lifted out of the hole by an external lifting device, thereby removing the rock column.

[0055] In summary, the biting mechanism 3 first forms a mechanical engagement with the rock column, then the grooving mechanism 4 forms an annular groove at the bottom of the rock column, and finally the first driving mechanism 2 drives the biting mechanism 3 to rotate the rock column, thereby stably transmitting torque to the rock column and causing the rock column to break first along the annular groove position, reducing the fracture resistance, improving the controllability of the fracture position and the integrity of the rock column after removal.

[0056] The following is combined with Figures 1 to 8 The present invention also provides a rock coring drilling method, applied to the aforementioned rock coring drilling equipment, the rock coring drilling method comprising: S100: Circular drilling is performed on the rock mass to form a rock column inside the drill pipe 11; S200: Drive the connector 31 to move toward the rock column and drive each drill rod 32 to penetrate into the rock column to form an engagement with the rock column; S300: Drive the grooving assembly to circumferentially groove the bottom sidewall of the rock column to form an annular groove; S300: Drive the connector 31 to rotate, so as to drive the rock column to rotate through each drill rod 32, causing the rock column to break along the annular groove.

[0057] By driving the drill barrel 11 and the annular drill bit 12 to rotate, and simultaneously applying axial thrust through an external propulsion device, the annular drill bit 12 cuts through the rock mass. As drilling deepens, the central portion of the rock mass remains uncut, thus forming a cylindrical rock column inside the drill barrel 11. During this process, the dust extraction connector 5 at the assembly end 112 of the drill barrel 11 connects to an external dust extraction device, which continuously removes rock dust generated during drilling, keeping the inside of the drill barrel 11 clean and reducing drilling resistance. The drilling depth can be adjusted according to actual needs or rock stratum thickness until the rock column reaches the predetermined length.

[0058] After drilling is completed, the first movable end 221 of the first drive mechanism 2 moves, driving the connecting member 31 to move axially along the drill barrel 11, causing the connecting member 31 to bring the drill rod 32 closer to the top of the rock column. Then, the second synchronous drive assembly 33 of the engagement mechanism 3 is activated, and the rotary driver 331 drives each drill rod 32 to rotate synchronously through the transmission connector 334. Under the action of the connecting member 31 pressing down and the drill rod 32 rotating, the drill rod 32 gradually penetrates into the rock column. Because each drill rod 32 rotates synchronously and is evenly distributed, the radial forces on the rock column are balanced, avoiding deviation or fracture caused by uneven force. When the drill rod 32 penetrates to a preset depth, each drill rod 32 is stably engaged with the rock column.

[0059] The lifting driver 421 in the grooving drive assembly 42 pushes the moving part 424 to move axially. Through the sliding engagement between the moving part 424 and the spiral groove 423 on the transmission part 422, the corresponding grooving cutter 41 is driven to rotate out of the cutter groove 113 to the grooving position. At the same time, the first synchronous drive assembly 43 drives the remaining grooving cutters 41 to rotate and extend synchronously and in the same direction through the meshing of the first gear ring 431 and the first gear 432. After each grooving cutter 41 extends, it contacts the bottom sidewall of the rock column. Driven by the rotation of the drill barrel 11, it performs circumferential cutting on the bottom of the rock column, thereby opening an annular groove on the bottom sidewall of the rock column. The annular groove reduces the structural strength of the bottom of the rock column. After the annular groove is opened, the grooving cutter 41 is switched to the storage position.

[0060] Then, the first movable end 221 of the first drive mechanism 2 moves, driving the connecting piece 31 to rotate around the axis of the drill barrel 11. This rotation is transmitted to the rock column through the drill rod 32, causing the rock column to rotate synchronously. The rock column undergoes torsional fracture at the annular groove, separating from the bottom rock mass. At this time, the rock column is contained within the drill barrel 11, and its top is engaged by the biting mechanism 3. The drill barrel 11 can then be lifted out of the hole by an external lifting device, thereby removing the rock column and completing the core sampling operation. This achieves the cutting and removal of the rock column without the need for secondary manual operations, greatly improving the efficiency and safety of core sampling.

[0061] It should be noted that the rock coring drilling equipment in this application can be applied to scenarios such as mining operations, geological exploration, or tunnel construction.

[0062] It should be noted that relational terms such as "first" and "second" mentioned in this application are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or specific order or sequence between these entities or operations. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0063] Furthermore, the terms "comprising," "including," and "having," as well as any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. For example, a process, method, system, product, or apparatus that comprises a list of steps or units is not necessarily limited to those steps or units expressly listed, but may include other steps or units not expressly listed or inherent to such process, method, product, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0064] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0065] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications and variations to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. Therefore, this application is not limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A rock core drilling device, characterized in that, include: The drilling mechanism includes a drill barrel and an annular drill bit disposed at the drilling end of the drill barrel; A first drive mechanism is disposed on the drill barrel. The first drive mechanism has a first movable end, which can move along the axial direction of the drill barrel and rotate about the axis of the drill barrel. The engagement mechanism includes a connector and a plurality of drill rods. The connector is disposed inside the drill barrel, located at the assembly end of the drill barrel, and connected to the first movable end. Each drill rod is located on the side of the connector facing the annular drill bit. A grooving mechanism, located at the drilling end of the drill barrel, is used to create an annular groove at the bottom of the rock column.

2. The rock coring drilling equipment according to claim 1, characterized in that, The grooving mechanism includes: Multiple grooving cutters are arranged circumferentially on the drill barrel. Multiple cutter slots are opened at the drilling end of the drill barrel. Each grooving cutter is correspondingly arranged in each cutter slot. The grooving cutter can switch between a storage position and a grooving position. In the grooving position, the grooving cutter extends out of the cutter slot to contact the bottom sidewall of the rock column.

3. The rock coring drilling equipment according to claim 2, characterized in that, The grooving mechanism also includes: A grooving drive assembly is disposed in one of the grooves to drive the rotation of the corresponding grooving cutter, thereby causing the grooving cutter to switch positions. A first synchronous drive component is used to drive the remaining grooving cutters to rotate synchronously and in the same direction when any one of the grooving cutters rotates.

4. The rock coring drilling equipment according to claim 3, characterized in that, The slotting drive component includes: A lifting drive is mounted on the drill barrel and located within the cutter groove; A transmission component is connected to the cutter shaft corresponding to the grooving cutter, and a helical groove is formed on the transmission component, the helical groove extending along the axial direction of the cutter shaft; The movable component is disposed on the lifting end of the lifting drive and slides in cooperation with the spiral groove.

5. The rock coring drilling equipment according to claim 4, characterized in that, The movable component is sleeved on the transmission component, and the inner wall of the movable component is provided with a movable block, which is embedded and cooperates with the spiral groove.

6. The rock coring drilling equipment according to claim 3, characterized in that, Each of the grooving cutters is circumferentially connected in the drill barrel to form a groove, and the first synchronous drive assembly includes: The first gear ring is rotatably disposed within the groove; Multiple first gears are provided, each first gear is respectively disposed on the cutter shaft of each grooving cutter, and each first gear meshes with the first gear ring.

7. The rock coring drilling equipment according to claim 1, characterized in that, The engagement mechanism further includes a second synchronous drive component, the second synchronous drive component comprising: A rotary actuator is mounted on the connector, and the rotating end of the rotary actuator is provided with a drive wheel; Multiple driven wheels are provided, and each driven wheel is respectively disposed on each drill pipe; A transmission connector is used for the transmission connection between the driving wheel and each of the driven wheels.

8. The rock coring drilling equipment according to claim 1, characterized in that, The annular drill bit is detachably mounted on the drill barrel.

9. The rock coring drilling equipment according to any one of claims 1-8, characterized in that, The assembly end of the drill barrel is provided with a dust exhaust connector, which is used to connect the dust collection device and the inside of the drill barrel.

10. A method for rock core drilling, characterized in that, The rock coring drilling method, applied to the rock coring drilling equipment as described in any one of claims 1-9, comprises: Circular drilling is performed on the rock mass to form a rock column inside the drill pipe; The drive connector moves toward the rock column and drives each drill rod to penetrate into the rock column to form an engagement with it. The drive grooving mechanism performs circumferential grooving on the bottom sidewall of the rock column to form an annular groove; The connecting member is driven to rotate, thereby causing the rock column to rotate through each of the drill rods, causing the rock column to break along the annular groove.

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