Rock mass coring device and method for geological mineral resource exploration

Abstract

The invention relates to the technical field of geological exploration, and discloses a rock mass coring device and method for geological mineral resource exploration, the rock mass coring device comprises an outer pipe, an inner pipe, a coring pipe, a plurality of damping plates and a plurality of core supporting assemblies, the inner wall of the lower end of the outer pipe is upwards concave and inclined, the inner pipe is connected into the outer pipe, and a gap is reserved between the lower end of the coring pipe and the lower end of the inner pipe; the multiple damping plates are evenly distributed on the inner wall, located below the coring pipe, of the inner pipe in the circumferential direction, sliding holes are horizontally formed in the inner walls, located on the damping plates, of the inner pipe in a penetrating mode, the outer pipe moves upwards to extrude the sliding blocks to slide towards the center direction of the coring pipe, and the lower ends of the damping plates extend towards the bottoms of the penetrating holes to form plugging plates. The core supporting assembly comprises a sliding rod slidably connected into the sliding hole and a supporting rod rotationally connected to the bottom of the sliding rod, the upper end of the sliding rod is connected with an anti-disengaging pin preventing the supporting rod from disengaging from the through hole, and the supporting rod rotates downwards after disengaging from the through hole and is perpendicular to the sliding rod. According to the invention, the rock core can be prevented from falling off.

Description

Technical Field

[0001] The invention relates to the technical field of geological exploration, and in particular to a rock coring device and method for geological and mineral resource exploration. Background Art

[0002] Geological exploration refers to the investigation and detection of geology to determine the appropriate bearing layer. According to the bearing capacity of the bearing layer, the foundation type is determined. Geological exploration can investigate and study the geological conditions such as rocks, strata, structures, minerals, hydrology, and landforms in a certain area. The commonly used exploration method is drilling. The existing drilling equipment is usually a coring drill, which drills holes in the strata to identify and divide the subsurface strata, and can take samples along the depth of the hole. The coring drill includes drilling and coring components and drive components.

[0003] The drilling and coring components include a drill rod and a drill bit. The drill rod is a hollow structure made of high-strength steel. The drill rod is usually composed of an outer tube and an inner tube. A sampling coring tube for sampling the rock layer structure is connected to the inner tube. The entire drill bit is composed of a combination of high-strength wear-resistant metals and hard crushing materials such as diamonds to ensure rapid crushing and milling of formation rocks. The inner wall of the outer tube connected to the drill bit is thicker near the bottom of the coring tube than the thickness above it, and a gathering ring is provided above the outer tube corresponding to the coring tube. When the driving member drives the drill rod to rotate and feed to the deep underground layer, and the core is drilled into the coring tube and reversed and cut off, the outer tube will be driven to move upward through the tractor. As the outer tube moves upward relative to the coring tube, the thick wall at the lower end of the outer tube squeezes the gathering ring, so that the gathering ring holds the core, so that the cut core moves up synchronously with the outer tube, the inner tube and the coring tube, thereby realizing external extraction sampling of the core.

[0004] However, when coring, since hard powder will also adhere to the outer wall of the bottom of the core along with the flushing fluid, when the gathering ring holds the core tightly, more hard powder will inevitably remain between the gathering ring and the core. The hard powder will make it difficult for the gathering ring to completely clamp and fit the outer wall of the core, especially when the core itself is heavy. After pulling up the drill rod, the core is easy to slide downward and fall off. For non-integrated scattered core, when it falls off at the bottom, the core without support above will fall and damage the gathering ring. Summary of the invention

[0005] The present invention provides a rock coring device and method for geological and mineral resource exploration, which can solve the above-mentioned problems in the prior art.

[0006] The present invention provides a rock coring device for geological and mineral resource exploration, comprising an outer tube with an inner wall at the lower end being concave and inclined upward, an inner tube connected to the outer tube, and a coring tube, wherein a spacing is left between the lower end of the coring tube and the lower end of the inner tube, and further comprising: a plurality of damping plates and a plurality of core supporting assemblies, wherein the plurality of damping plates are uniformly distributed along the circumferential direction on the inner wall of the inner tube located below the coring tube, the inner wall of the inner tube located at each damping plate is horizontally penetrated with sliding holes, the damping plates are horizontally slidably connected to the sliding holes through sliders connected to the side walls, and the sliders are away from the damping plates One end of is close to the inner wall of the outer tube and presents a conical surface that matches the inclined surface of the outer tube. The outer tube moves upward to squeeze the slider to slide toward the center of the core tube. A damping plate is located on one side of each sliding hole and a vertical through hole is opened. A sealing plate is extended from the lower end of the damping plate to the bottom of the through hole. Multiple core supporting assemblies are respectively placed in each through hole. The core supporting assembly includes a sliding rod slidably connected to the sliding hole and a supporting rod rotatably connected to the bottom of the sliding rod. The upper end of the sliding rod is connected to an anti-slip pin to prevent it from slipping out of the through hole. After the supporting rod slips out of the through hole, it rotates downward and is perpendicular to the sliding rod.

[0007] Preferably, when each slide block slides inwardly to an extreme position, the minimum inner diameter enclosed by each damping plate is smaller than the inner diameter of the core tube.

[0008] Preferably, the damping plate is arranged in an arc shape, and a rubber layer is arranged on the inner arc surface in contact with the rock core, and a plurality of soft and deformable rubber protrusions extend from the inner arc surface of the rubber layer.

[0009] Preferably, the blocking plate is fixedly connected to the lower surface of the damping plate and extends horizontally below the through hole. When the damping plate is in contact with the inner wall of the inner tube, the blocking plate blocks the lower opening of the through hole.

[0010] Preferably, a stopper is extended downwardly on the side of the lower end of the slide bar away from the core drilling tube, and the thickness of the side of the support rod close to the stopper is less than the thickness of the side away from the stopper. When the support rod rotates downward under its own weight, one end of the support rod is pressed against the stopper so that the slide bar and the support rod are perpendicular to each other. A placement groove is horizontally opened on the side of the slide bar close to the core drilling tube for the support rod to be placed therein after rotating upward, and the depth of the placement groove gradually becomes shallower from bottom to top.

[0011] Preferably, the core support assembly also includes: a pin and a launching spring, the pin is fixedly connected to one side of the sliding rod, the inner tube is located on one side of the pin and has a sliding cavity, the outer tube is extended and fixedly connected to one side close to the sliding cavity with a horizontal top plate, the top plate extends into the sliding cavity, and as the height of the top plate rises, its upper surface contacts the pin, the launching spring is sleeved on the sliding rod and is located above the anti-slip pin, the lower end of the launching spring is fixedly connected to the anti-slip pin, and the upper end is fixedly connected to the inner wall of the inner tube.

[0012] Preferably, the lower portion of the slide rod and the support rod are connected via a pulling rope.

[0013] Preferably, the damping plates are gathered into a ring shape.

[0014] Preferably, when each supporting rod is rotated to a horizontal state, the distance between two opposing supporting rods is smaller than the minimum outer diameter of the core.

[0015] The present invention also provides a coring method of a rock coring device for geological and mineral resource exploration, comprising the following steps:

[0016] S1. After coring, the outer tube is pulled upward as a whole, and the inclined inner wall at the lower end of the outer tube moves upward and squeezes each slider. The sliders subjected to the squeezing force slide horizontally along the sliding hole toward one side of the core, and the damping plates gather together, and each damping plate provides friction damping force on the bottom surface of the core;

[0017] S2. When each damping plate clamps the rock core and lifts it up slightly, the plugging plate moves horizontally toward the side of the rock core along with the damping plate, and the bottom opening of the through hole opens. The launch spring under high pressure drives the slide bar and the support rod to launch downward quickly, and the anti-drop pin limit slide bar and the support rod placed on the outside rotate downward under the action of gravity, and each support rod is located below the rock core;

[0018] S3. The outer tube continues to rise, and the top plates of the outer tube contact the pins, and drive the pins and the slide rods to move upward, at which time the support plates are driven toward the lower end of the core, actively lifting the bottom of the core.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting up a plurality of damping plates, the outer tube can be lifted up and driven by the slider to clamp the lower side wall of the core to be cored, and at the same time, the damping plates can provide radial friction damping force for the core, so as to make the core clamping more firmly, wherein each slider plays the effect of synchronously driving the damping plates and limiting the damping plates to offset, tilt or rotate, and by limiting the end of the slider away from the damping plate to be close to the inner wall of the outer tube and to present a conical surface that matches the inclined surface of the outer tube, the inner inclined surface of the outer tube can be in contact with the inclined surface of the slider during the upward movement, thereby achieving the effect of the longitudinal force driving the slider to move horizontally, thereby achieving the effect of driving the damping plate to move, and the blocking plate can be set when the damping plate is close to the inner tube. The lower opening of the through hole is sealed and blocked. After each damping plate clamps the rock core and lifts it slightly upward, the blocking plate at the bottom of the damping plate moves horizontally toward one side of the rock core along with the damping plate. At this time, the bottom opening of the through hole is in an open state. The provided sliding rod and supporting rod will slide down by their own weight and finally make the supporting rod fall out of the through hole. The anti-falling pin can achieve the anti-falling limiting effect of the sliding rod. The anti-falling pin is locked with the inner wall of the through hole. At this time, the supporting rod placed on the outside will rotate downward under the action of gravity. Each supporting rod is located below the rock core, thereby achieving an open state, which has a beneficial effect of further passive protection for the rock core. Even when the preload force of each damping plate is weakened, the supporting rods still have the effect of lifting, thereby preventing the rock core from falling off as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the internal cross-sectional structure of a rock coring device for geological and mineral resource exploration in a first state provided by an embodiment of the present invention;

[0021] Figure 2 for Figure 1 A partial enlarged view of part A;

[0022] Figure 3 A schematic diagram of the internal cross-sectional structure of a rock coring device for geological and mineral resource exploration in a second state provided by an embodiment of the present invention;

[0023] Figure 4 for Figure 3 A partial enlarged view of part B;

[0024] Figure 5 A schematic diagram of the internal cross-sectional structure of a rock coring device for geological and mineral resource exploration provided by an embodiment of the present invention in a partial third state;

[0025] Figure 6 A partial structural schematic diagram of a rock coring device for geological and mineral resource exploration provided in an embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 1. Outer tube; 2. Inner tube; 3. Core tube; 4. Damping plate; 41. Sliding hole; 42. Through hole; 5. Slider; 6. Sealing plate; 7. Core support assembly; 71. Sliding rod; 711. Anti-drop pin; 712. Pin; 713. Placement slot; 72. Support rod; 73. Launch spring; 8. Stopper; 9. Pull rope. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] refer to Figure 1-6The present invention provides a rock coring device for geological and mineral resource exploration, comprising an outer tube 1 whose inner wall at the lower end is concave and inclined upward, an inner tube 2 connected to the outer tube 1, and a coring tube 3, wherein a gap is left between the lower end of the coring tube 3 and the lower end of the inner tube 2, and further comprising: a plurality of damping plates 4, a plurality of core support assemblies 7, wherein the plurality of damping plates 4 are uniformly distributed along the circumferential direction on the inner wall of the inner tube 2 located below the coring tube 3, and the inner wall of the inner tube 2 located at each damping plate 4 is horizontally penetrated with a sliding hole 41, and the damping plate 4 is horizontally slidably connected to the sliding hole 41 through a slider 5 connected to the side wall, and the end of the slider 5 away from the damping plate 4 is close to the inner wall of the outer tube 1 The outer tube 1 is moved upward to squeeze the slider 5 to slide toward the center of the core tube 3. A damping plate 4 is provided with a vertical through hole 42 on one side of each sliding hole 41. A sealing plate 6 is extended from the lower end of the damping plate 4 to the bottom of the through hole 42. A plurality of core support assemblies 7 are respectively placed in each through hole 42. The core support assemblies 7 include a sliding rod 71 slidably connected to the sliding hole 41 and a supporting rod 72 rotatably connected to the bottom of the sliding rod 71. An anti-slip pin 711 is connected to the upper end of the sliding rod 71 to prevent the sliding rod 71 from slipping out of the through hole 42. After the supporting rod 72 slips out of the through hole 42, it rotates downward and is perpendicular to the sliding rod 71.

[0031] In the above embodiment, the multiple damping plates 4 can be driven by the slider 5 to clamp the lower side wall of the core to be cored when the outer tube 1 is lifted. At the same time, the damping plates 4 can provide radial friction damping force for the core to make the core clamping more secure. Each slider 5 plays the role of synchronously driving the damping plates 4 and limiting the damping plates 4 to offset, tilt or rotate. By limiting the end of the slider 5 away from the damping plate 4 to be close to the inner wall of the outer tube 1 and to present a conical surface that matches the inclined surface of the outer tube 1, the inner inclined surface of the outer tube 1 can be in contact with the inclined surface of the slider 5 during the upward movement, thereby achieving the effect of the longitudinal force driving the slider 5 to move horizontally, thereby achieving the function of driving the damping plate 4 to move. The blocking plate 6 can be set to seal the lower opening of the through hole 42 when the damping plate 4 is close to the inner tube 2. When the locking cam 72 is in the closed position, the locking cam 73 will be in the closed position, and the locking cam 73 will be in the open position when the locking cam 73 is in the open position.

[0032] Further, refer to Figure 1-6 When each slide block 5 slides inward to the limit position, the minimum inner diameter surrounded by each damping plate 4 is smaller than the inner diameter of the core tube 3.

[0033] In the above embodiments, when the sliders 5 are restricted from sliding inward to the limit position, the minimum inner diameter enclosed by the damping plates 4 is smaller than the inner diameter of the core tube 3, so that sufficient clamping space and gap can be reserved.

[0034] Further, refer to Figure 1-6 The damping plate 4 is arranged in an arc shape, and a rubber layer is arranged on the inner arc surface in contact with the rock core, and a plurality of soft and deformable rubber protrusions extend from the inner arc surface of the rubber layer, and each damping plate 4 is annular when gathered.

[0035] In the above embodiments, when the damping plates 4 are gathered together to form a group of damping plates 4 smaller than the outer diameter of the core, the rubber protrusions and the rubber layer will be squeezed and deformed, and the rubber protrusions and rubber will provide further friction damping force for the core.

[0036] Further, refer to Figure 1-6 The blocking plate 6 is fixedly connected to the lower surface of the damping plate 4 and extends horizontally below the through hole 42 . When the damping plate 4 is in contact with the inner wall of the inner tube 2 , the blocking plate 6 blocks the lower opening of the through hole 42 .

[0037] Further, refer to Figure 6 The lower end of the slide bar 71 is provided with a stopper 8 extending downwardly from the side away from the core drilling tube 3. The thickness of the side of the support rod 72 close to the stopper 8 is less than the thickness of the side away from the stopper 8. When the support rod 72 rotates downward under its own weight, one end of it is pressed against the stopper 8 so that the slide bar 71 and the support rod 72 are perpendicular to each other. A placement groove 713 is horizontally opened on the side of the slide bar 71 close to the core drilling tube 3 so that the support rod 72 can be placed therein after rotating upward, and the depth of the placement groove 713 gradually becomes shallower from bottom to top.

[0038] In the above embodiments, the stopper 8 is a necessary means for ensuring that the slide rod 71 and the support rod 72 are perpendicular. This embodiment specifically limits this component, but in reality it is not limited to this vertical plate. By limiting the thickness of the side of the support rod 72 close to the stopper 8 to be less than the thickness of the side away from the stopper 8 and the depth of the placement groove 713 gradually becomes shallower from bottom to top, after the support rod 72 is out of the through hole 42, it can rely on its own weight to tilt and rotate toward one side of the core.

[0039] Further, refer to Figure 5The core support assembly 7 also includes: a pin 712 and a launching spring 73. The pin 712 is fixedly connected to one side of the sliding rod 71. The inner tube 2 is provided with a sliding cavity on one side of the pin 712. A horizontal top plate is extended and fixedly connected to one side of the outer tube 1 close to the sliding cavity. The top plate extends into the sliding cavity. As the height of the top plate rises, its upper surface contacts the pin 712. The launching spring 73 is sleeved on the sliding rod 71 and is located above the anti-slip pin 711. The lower end of the launching spring 73 is fixedly connected to the anti-slip pin 711, and the upper end is fixedly connected to the inner wall of the inner tube 2.

[0040] In the above embodiment, the launch spring 73 is provided to provide auxiliary power for the slide bar 71 to slide downward, so that the slide bar 71 can respond quickly to the downward sliding, so as to ensure that the support rod 72 can be opened quickly and efficiently during the rising process of the outer tube 1. The top plate and the pin 712 provided therein can realize that the support rod 72 first moves downward, then automatically opens after reaching the bottom of the core and is driven by the slide bar 71 to move upward, and adaptively abuts against the bottom of the core, so that the lifting force provided by passive protection and the core is realized as the effect of actively providing the lifting force to the core, thereby realizing the overall effect of preventing the core from falling off during the coring process and ensuring the beneficial effect of the complete removal of the core.

[0041] Further, refer to Figure 6 The lower part of the slide rod 71 is connected to the support rod 72 through a pulling rope body 9.

[0042] In the above embodiments, the pulling rope 9 is arranged to connect the support rod 72 and the sliding rod 71, and can provide an auxiliary tightening effect for the support rod 72, thereby preventing the support rod 72 from deviating and tilting downward, ensuring the balance of the support rod 72, and improving the stability of the support rod 72.

[0043] Further, refer to Figure 1-6 In order to ensure the lifting effect of the support rods 72 on the bottom of the core, when each support rod 72 rotates to a horizontal state, the distance between two opposing support rods 72 is smaller than the minimum outer diameter of the core.

[0044] The present invention also provides a coring method of a rock coring device for geological and mineral resource exploration, comprising the following steps and principles:

[0045] S1. After coring is completed in the coring tube 3, the core is reversed and cut off, and the outer tube 1 is pulled upward as a whole. The inclined inner wall at the lower end of the outer tube 1 moves upward and squeezes each slider 5. The sliders 5 subjected to the squeezing force will slide horizontally along the sliding hole 41 toward one side of the core. As the outer tube 1 continues to move upward, the slider 5 will be placed in the extreme position in the sliding hole 41 depending on the increase in the angle of the inclined surface of the outer tube 1. At this time, the damping plates 4 gather together to form a group of damping plates 4 smaller than the outer diameter of the core. At this time, the rubber protrusions and the rubber layer will be squeezed and deformed, and the rubber protrusions and rubber are used to provide further friction damping force for the core;

[0046] S2. After each damping plate 4 clamps the rock core and lifts up slightly, the blocking plate 6 at the bottom of the damping plate 4 moves horizontally toward one side of the rock core along with the damping plate 4. At this time, the bottom opening of the through hole 42 is in an open state, and the launch spring 73 in a high-pressure state drives the slide bar 71 and the support rod 72 to launch downward quickly. At this time, the anti-drop pin 711 limits the slide bar 71 to prevent it from falling out, and the support rod 72 placed on the outside rotates downward under the action of gravity, and each support rod 72 is located below the rock core;

[0047] S3. As the outer tube 1 continues to rise, the top plates of the outer tube 1 extending into the sliding cavity will contact the pin column 712, thereby driving the pin column 712 and the sliding rod 71 to move upward, and at this time driving the support plate to approach the lower end of the core, so that the lifting force provided by passive protection and the core is actively provided to the core. The lifting force is achieved as a whole to prevent the core from falling off during the coring process, and the beneficial effect of ensuring the complete removal of the core is achieved.

[0048] The above disclosures are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A rock coring device for geological and mineral resource exploration, comprising an outer tube (1) with an inner wall at the lower end thereof being upwardly concave and inclined, an inner tube (2) connected to the outer tube (1), and a coring tube (3), characterized in that: A gap is left between the lower end of the core tube (3) and the lower end of the inner tube (2), and further comprises: A plurality of damping plates (4) are evenly distributed along the circumferential direction on the inner wall of the inner tube (2) located below the core tube (3); a sliding hole (41) is horizontally penetrated through the inner wall of each damping plate (4) of the inner tube (2); the damping plate (4) is horizontally slidably connected to the sliding hole (41) via a slider (5) connected to the side wall; the end of the slider (5) away from the damping plate (4) is close to the inner wall of the outer tube (1) and presents a conical surface that matches the inclined surface of the outer tube (1); the upward movement of the outer tube (1) squeezes the slider (5) to slide toward the center of the core tube (3); a vertical through hole (42) is opened on one side of each sliding hole (41) of the damping plate (4); a sealing plate (6) is extended from the lower end of the damping plate (4) to the bottom of the through hole (42); A plurality of core support assemblies (7) are respectively placed in each of the through holes (42). The core support assemblies (7) include a sliding rod (71) slidably connected to the sliding hole (41) and a support rod (72) rotatably connected to the bottom of the sliding rod (71). The upper end of the sliding rod (71) is connected to an anti-slip pin (711) to prevent the sliding rod (71) from slipping out of the through hole (42). After the support rod (72) slips out of the through hole (42), it rotates downward and is perpendicular to the sliding rod (71).

2. A rock coring device for geological and mineral resource exploration as claimed in claim 1, characterized in that: When each of the slide blocks (5) slides inward to an extreme position, the minimum inner diameter formed between the damping plates (4) is smaller than the inner diameter of the core tube (3).

3. A rock coring device for geological and mineral resource exploration as claimed in claim 1, characterized in that: The damping plate (4) is arranged in an arc shape, and a rubber layer is arranged on the inner arc surface in contact with the rock core, and a plurality of soft and deformable rubber protrusions extend from the inner arc surface of the rubber layer.

4. A rock coring device for geological and mineral resource exploration as claimed in claim 1, characterized in that: The blocking plate (6) is fixedly connected to the lower surface of the damping plate (4) and extends horizontally below the through hole (42); when the damping plate (4) is in contact with the inner wall of the inner tube (2), the blocking plate (6) blocks the lower opening of the through hole (42).

5. A rock coring device for geological and mineral resource exploration as claimed in claim 1, characterized in that: A stopper (8) extends downwardly from the lower end of the slide bar (71) away from the core tube (3); the thickness of the side of the support rod (72) close to the stopper (8) is less than the thickness of the side away from the stopper (8); when the support rod (72) rotates downward by its own weight, one end of the support rod (72) abuts against the stopper (8) so that the slide bar (71) and the support rod (72) are perpendicular to each other; a placement groove (713) is horizontally opened on the side of the slide bar (71) close to the core tube (3) so that the support rod (72) can be placed therein after rotating upward, and the depth of the placement groove (713) gradually becomes shallower from bottom to top.

6. A rock coring device for geological and mineral resource exploration as claimed in claim 5, characterized in that: The core support assembly (7) further comprises: A pin (712) is fixedly connected to one side of the slide rod (71); a sliding cavity is formed on the inner tube (2) located on one side of the pin (712); a horizontal top plate is extended and fixedly connected to one side of the outer tube (1) close to the sliding cavity; the top plate extends into the sliding cavity, and as the height of the top plate increases, its upper surface contacts the pin (712); A launching spring (73) is sleeved on the slide bar (71) and is located above the anti-dropping pin (711); the lower end of the launching spring (73) is fixedly connected to the anti-dropping pin (711), and the upper end is fixedly connected to the inner wall of the inner tube (2).

7. A rock coring device for geological and mineral resource exploration as claimed in claim 6, characterized in that: The lower part of the sliding rod (71) and the supporting rod (72) are connected via a pulling rope (9).

8. A rock coring device for geological and mineral resource exploration as claimed in claim 1, characterized in that: The damping plates (4) are gathered together to form a ring shape.

9. A rock coring device for geological and mineral resource exploration as claimed in claim 7, characterized in that: When each of the support rods (72) rotates to a horizontal state, the distance between two opposing support rods (72) is smaller than the minimum outer diameter of the rock core.

10. A coring method for a rock coring device for geological and mineral resource exploration as claimed in claim 7, characterized in that: The following steps are involved: S1. After coring, the outer tube (1) is pulled upward as a whole, and the inclined inner wall at the lower end of the outer tube (1) moves upward and squeezes each slider (5). The sliders (5) subjected to the squeezing force slide horizontally along the sliding hole (41) toward one side of the core, and the damping plates (4) gather together, and each damping plate (4) provides friction damping force on the bottom surface of the core; S2, when each damping plate (4) clamps the rock core and is slightly lifted upward, the blocking plate (6) moves horizontally toward one side of the rock core along with the damping plate (4), the bottom opening of the through hole (42) opens, and the launching spring (73) in a high-pressure state drives the slide bar (71) and the support rod (72) to launch downward quickly, the anti-drop pin (711) limits the slide bar (71), and the support rod (72) placed on the outside rotates downward under the action of gravity, and each support rod (72) is located below the rock core; S3, the outer tube (1) continues to rise, and the top plates of the outer tube (1) contact the pins (712), and drive the pins (712) and the slide bar (71) to move upward, at which time the support plate is driven to approach the lower end of the core, actively lifting it to the bottom of the core.

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