Device and method for preparing rock mass samples with different bedding and laminate dip angles

Abstract

The invention discloses a device and method for preparing rock mass samples containing different bedding and laminate dip angles, the device comprises a base, a test box, two swing arms, an angle adjusting frame, a drilling device, a positioning correction device and an electric control unit, the test box is arranged above the base, the two swing arms are symmetrically arranged on the front side and the rear side of the test box, and the angle adjusting frame is arranged on the base; the swing arm is provided with a swing arm driving mechanism and a brake mechanism. The angle adjusting frame is longitudinally arranged between the two swing arms, and the two ends of the angle adjusting frame are adjustably and fixedly connected with the two swing arms respectively. The drilling device comprises a servo motor, a threaded drill rod and a drill bit, the servo motor is arranged on the angle adjusting frame, and an output shaft of the servo motor is a hollow shaft. The threaded drill rod penetrates through the inner side of the hollow shaft, and the drill bit is installed at the lower end of the threaded drill rod. The positioning and correcting device comprises two N-shaped frames, and a positioning plate and a correcting plate are arranged between the two N-shaped frames. Multi-angle sampling is carried out on the top and the two sides of the rock mass model, the drilling angle is flexibly adjusted, the accuracy and consistency of the drilling angle are ensured, and the sampling efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of rock sample processing, and in particular to a device and a method for preparing rock samples containing different beddings and layer inclinations. Background Art

[0002] Anisotropy is a typical mechanical characteristic of layered rock mass (such as shale, slate, etc.), and is also one of the main research directions in the field of rock mechanics and engineering. Unlike general rock mass, the deformation and strength of layered rock mass have obvious anisotropic characteristics, and its failure mechanism is more complicated. Engineering accidents caused by the stability of layered rock mass occur from time to time, causing certain economic losses. The study of the mechanical properties of layered rock mass has important practical significance. In order to study the anisotropic mechanical characteristics of layered rock mass, it is necessary to drill layered rock samples with different bedding plane inclinations and further grind them into standard samples. The standard samples are cylinders, cuboids or cubes, and a series of physical, mechanical and permeability tests are carried out. Therefore, it is very important to prepare layered rock samples with different bedding plane inclinations indoors.

[0003] The natural layered rocks collected on site have different specifications and large discreteness, which cannot better meet the requirements of laboratory experiments. At present, the molds for preparing and drilling rock samples are relatively simple, with problems such as low drilling efficiency and drilling angle accuracy, poor stability and continuity during drilling, cumbersome operation procedures and high operation intensity. It can be seen that the existing rock sampling equipment cannot meet the needs of actual use. Based on this situation, it is necessary to propose a solution for the preparation and drilling of samples of similar materials of layered rock. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, one object of the present invention is to propose a device for preparing rock samples containing different bedding and layer inclination angles, so as to solve the problems of low drilling efficiency and drilling angle accuracy of rock samples, poor stability and continuity during drilling, and complicated operating procedures and high work intensity.

[0005] A device for preparing rock samples containing different beddings and layer inclinations, comprising a base, a test box, a swing arm, an angle adjustment frame, a drilling device, a positioning correction device and an electronic control unit. The test box is a square box with an open top and detachable left and right sides. The test box is arranged above the base through two guide rails, and an adjustable foot is provided at each of the four corners of the bottom.

[0006] There are two swing arms, which are symmetrically arranged on the outside of the two guide rails. The lower end of each swing arm is rotatably connected to the base through a hinge support. A swing arm driving mechanism is provided on the side of the two hinge supports facing away from each other. The two swing arm driving mechanisms respectively drive the two swing arms to move synchronously. A braking mechanism is provided on one side of each swing arm driving mechanism for fixing the swing arm on the same side.

[0007] A slider seat is provided in the middle and upper part of the swing arm and is adjustably fixed thereto. The angle adjustment frame is arranged longitudinally and horizontally between the two swing arms, and its front and rear ends are respectively rotatably connected to the two slider seats. The two slider seats are provided with a first locking block fixedly connecting the angle adjustment frame and the slider seat on the sides facing away from each other.

[0008] The drilling device comprises a motor mounting frame, a servo motor, a threaded drill rod and a drill bit. The motor mounting frame is arranged on the angle adjustment frame and is fixedly connected to the angle adjustment frame so that the front and rear relative positions can be adjusted. The servo motor is fixed on the top of the motor mounting frame, and its output shaft adopts a hollow shaft.

[0009] The threaded drill rod is slidably inserted into the inner side of the hollow shaft, a nut seat matching the threaded drill rod is provided at the lower part of the motor mounting frame, the lower end of the threaded drill rod passes through the nut seat and is detachably fixedly connected to the upper end of the drill bit, and the servo motor drives the drill bit to rotate and move along its axial direction through the threaded drill rod.

[0010] The positioning and correction device comprises two N-shaped frames detachably mounted on the front and rear sides of the test box, a positioning plate and a correction plate are arranged between the two N-shaped frames, and the front and rear ends of the positioning plate and the correction plate are slidably matched with the top and left and right sides of the two N-shaped frames through a square slider.

[0011] In addition, the front and rear ends of the positioning plate and the correction plate are respectively rotatably connected to the corresponding square sliders, and the two square sliders located on the front N-shaped frame are provided with a second locking block, which fixes the positioning plate or the correction plate to the corresponding square slider.

[0012] Furthermore, the test box includes a bottom plate, a front side plate, a rear side plate, a left side plate and a right side plate, the lower ends of the front side plate and the rear side plate are fixedly connected to the bottom plate, the left side plate and the right side plate are vertically arranged between the front side plate and the rear side plate, and the front and rear ends of the left side plate and the right side plate are respectively plugged and fixedly connected to the opposite side walls of the front side plate and the rear side plate.

[0013] The front side wall of the rear side plate is provided with two T-shaped sliding grooves arranged on the left and the right, and the rear side wall of the front side plate is provided with two identical T-shaped sliding grooves corresponding to the positions of the rear side plates one by one.

[0014] The left and right side panels are provided with integrated long T-shaped sliders at both front and rear ends, and each T-shaped slider is slidably matched with the corresponding T-shaped slot. The left and right ends of the front and rear side panels extend out of the outer wall of the left or right side panel.

[0015] Furthermore, the cross section of the guide rail is square, and the two guide rails are arranged in parallel on the base in a transverse direction, and the surface of the guide rail has a plurality of rollers arranged at intervals along the length direction thereof.

[0016] A limit plate is fixedly provided at the bottom of the test box, and the front and rear sides of the limit plate are respectively slidably matched with the side walls of the two guide rails. The front side of the bottom plate has a horizontal ruler 1 arranged horizontally, and the right side of the limit plate has a horizontal ruler 2 arranged vertically.

[0017] Furthermore, a first rotating shaft is fixed to the lower end of each swing arm, and the two first rotating shafts are coaxially arranged and respectively connected to the hinge support for rotation. The swing arm driving mechanism includes a worm wheel, a worm and a stepper motor. The worm wheel is fixedly mounted on the first rotating shaft, the worm is laterally arranged below the worm wheel and cooperates with its thread, and the stepper motor is fixed to the base, and its output shaft drives the worm to rotate forward or reverse.

[0018] The braking mechanism includes a guide rod bracket, a brake block, a brake disc, a bidirectional screw and two stepper motors. The brake disc is fixedly mounted on the first rotating shaft. The guide rod bracket is fixed above the base through a mounting plate. There are two brake blocks, which are symmetrically arranged on the front and rear sides of the brake disc and cooperate with the guide rod bracket in longitudinal sliding.

[0019] Stepper motor 2 is fixed to the outside of the front side of the guide rod bracket, and the bidirectional lead screw passes through the two brake blocks and respectively cooperates with the two brake block threads. One end of the bidirectional lead screw is fixedly connected to the output shaft of stepper motor 2, and the other end is rotatably connected to the guide rod bracket. Stepper motor 2 drives the two brake blocks through the bidirectional lead screw to clamp the brake disc, thereby fixing the swing arm and the base.

[0020] Furthermore, the upper and middle part of the swing arm has a through groove opened along its length direction, the slider seat is embedded in the through groove and slidingly cooperates with the swing arm, and two vertical plates are symmetrically provided on the left and right sides of the swing arm. One end of the two vertical plates is an integral structure with the slider seat, and the vertical plates are slidingly cooperated with the outer wall of the swing arm.

[0021] A group of bolt holes are provided on the left and right side walls of the swing arm, and each group of bolt holes includes multiple bolt holes arranged at equal intervals along the length direction of the swing arm. Two fastening bolts are provided on each vertical plate, and the fastening bolts can be screwed into the bolt holes to fix the slider seat on the swing arm.

[0022] Furthermore, the angle adjustment frame comprises two square shafts which are longitudinally arranged in parallel and spaced apart, the front ends and rear ends of the two square shafts are respectively fixedly connected to form a whole through a circular disc, and the two circular discs are coaxially arranged.

[0023] A second rotating shaft is fixed to each side of the two discs, and the two second rotating shafts are coaxially arranged. One end of the second rotating shaft is connected to the center of the disc as a whole. The second rotating shaft passes through the inner side of the slider seat on the same side and rotates with the slider seat. The other end of the second rotating shaft is located in the first locking block, and the first locking block is provided with a first locking bolt that can lock the second rotating shaft.

[0024] Furthermore, two square shafts are inserted into the inner side of the motor mounting frame, the motor mounting frame and the square shafts are longitudinally slidably matched, and a positioning bolt is provided on one side of the motor mounting frame, and the positioning bolt fixes the motor mounting frame on the square shaft.

[0025] A keyway along its axial direction is opened on the circumferential side wall of the threaded drill rod, a flat key matching the keyway is fixed on the inner wall of the hollow shaft, the nut seat is fixed to the lower part of the motor mounting frame, the threaded drill rod passes through the nut seat and matches with its thread, the drill bit is a cylindrical shape with a closed top, and its lower end face is a toothed structure.

[0026] When the servo motor drives the threaded drill rod to rotate, the threaded drill rod moves linearly relative to the motor mounting frame.

[0027] Furthermore, a slideway consistent with its shape is provided on the N-shaped frame, and the main part of the square slider is a cube, which is located on the opposite side of the two N-shaped frames and has a limiting portion extending outward. The square slider is located on the inner side of the slideway and slides horizontally with the top of the N-shaped frame, and can also slide vertically with the left and right sides of the N-shaped frame.

[0028] An angle plate is fixed on the front side of the two square sliders in the rear N-shaped frame. The positioning plate and the correction plate are both rectangular flat plates with a third rotating shaft fixed at both ends. The center line of the positioning plate or the correction plate coincides with the axis of the third rotating shaft located at both ends.

[0029] The third rotating shaft located on the front side passes through the corresponding square slider and extends to the inner side of the second locking block. The second locking block is provided with a second locking bolt that can lock the third rotating shaft. The third rotating shaft located on the rear side is fixed with a pointer that matches the angle disk, and its rear end passes through the corresponding square slider and is provided with a locking nut.

[0030] Furthermore, the N-shaped frame is an integrated structure consisting of a crossbeam and two upright posts, and adjacent sides of the two upright posts are each provided with a vertical groove that matches with the end of the front side plate or the rear side plate.

[0031] The inner sides of the crossbeam and the column are respectively provided with straight grooves along their length direction, the cross section of the straight grooves matches the square slider, and the two ends of the straight grooves in the crossbeam are connected with the upper ends of the straight grooves in the two columns to form the slideway.

[0032] Another object of the present invention is to provide a method for preparing rock samples containing different bedding and stratum inclination angles.

[0033] A method for preparing rock samples containing different bedding and layer plate inclination angles, based on the above-mentioned device for preparing rock samples containing different bedding and layer plate inclination angles, the method comprises the following steps:

[0034] Step 1: According to the relevant parameters and similarity ratios of the strata and bedding in the real layered rock mass, the strata similar material ratio and the bedding similar material ratio are determined respectively, and the strata similar material and the bedding similar material are prepared.

[0035] Adjust the adjustable feet at the bottom of the test box to make the bottom surface of the test box in a horizontal state. Then, lay the layer-similar materials and bedding-similar materials of predetermined thickness alternately from bottom to top inside the test box. After laying each layer of layer-similar materials or bedding-similar materials, they need to be leveled and compacted until the rock model is laid and reaches the predetermined strength after curing.

[0036] Step 2: Remove the left and right panels of the test box, then install two N-shaped frames on the front and rear panels of the test box respectively, with the bottom of the crossbeam of the N-shaped frame attached to the upper end of the front or rear panel.

[0037] Adjust the adjustable feet at the bottom of the test box to lift it off the ground and let the test box fall onto the guide rails.

[0038] Move the test box and the rock model inside it along the guide rail to between the two swing arms, with the two hinged supports in the middle of the test box. Adjust the adjustable feet at the bottom of the test box again to raise the test box. After the bottom of the test box is off the guide rail, it is in a horizontal state.

[0039] Step 3: According to the sampling position and sampling angle at the top of the rock mass model, move the positioning plate and the correction plate to both sides of the sampling position, and adjust the angles of the positioning plate and the correction plate to be consistent with the sampling angle.

[0040] Afterwards, the positioning plate is fixedly connected to the two N-shaped frames, and the correction plate is fixedly connected to the square slider at its front end. At this time, the correction plate can slide on the two N-shaped frames through the square sliders at its front and rear ends.

[0041] Step 4: Drive the swing arm to rotate toward one side of the sampling position through the swing arm driving mechanism, start the servo motor, and drive the drill bit to move downward to the upper surface close to the rock model, then stop moving, and the drill bit is between the positioning plate and the correction plate.

[0042] The angle of the swing arm is adjusted again by the swing arm driving mechanism, and at the same time, the angle adjustment frame is rotated to make the drill bit approach one side of the positioning plate, and the circumferential side wall of the drill bit is completely fitted with the side wall of the positioning plate. After that, the correction plate moves toward the drill bit, and its side wall is completely fitted with the circumferential side wall of the drill bit, fixing the correction plate to the two N-shaped frames.

[0043] The swing arm is locked by a brake mechanism, and the first locking block locks the front and rear ends of the angle adjustment frame, and the two ends of the angle adjustment frame are fixedly connected to the two swing arms respectively.

[0044] Step 5: Move the positioning plate and correction plate to both sides of the drill bit, and lock the motor mounting bracket and the angle adjustment bracket.

[0045] The servo motor is started again, the drill bit rotates forward to contact the rock model and drill downward to obtain the rock sample. After reaching the set drilling depth, the drill bit reverses to take out the rock sample. Afterwards, the sampling position and / or sampling angle of the drill bit is adjusted and the sampling is repeated multiple times at the top of the rock model in the above manner.

[0046] Step 6: After sampling at the top of the rock model, adjust the angle adjustment frame, drilling device, positioning plate and correction plate to the side of the rock model, repeat steps 3 to 5, and the drilling device completes sampling on the side of the rock model.

[0047] The drilled rock samples are cut and polished into standard samples as required for use.

[0048] By adopting the above technical solution, the beneficial technical effects of the present invention are:

[0049] 1. The present invention combines large-scale horizontal model laying with multi-angle drilling to achieve sampling at multiple positions on the left, top and right sides of the rock model. It has a high degree of automation, ensures the continuity and stability of the sampling process, and speeds up the sampling speed, reduces the interval of sampling time, and can maximize the use of the laid model materials, thereby improving the utilization rate of the model materials.

[0050] 2. The present invention can flexibly adjust the drilling angle, and the drilling device is precisely matched with the positioning plate and the correction plate to ensure the accuracy and consistency of the sample drilling angle.

[0051] 3. Model laying and parameter adjustment are more flexible. According to the relevant parameters (physical, mechanical and permeability) and main similarity ratios of the stratified rock mass and the bedding, the similar material ratio of the stratified rock and the bedding is obtained through the proportioning test, and used as the basis for model laying. The laying thickness of the stratified rock and the bedding can be flexibly adjusted according to the specific needs of the test to ensure the horizontality of each stratified rock and the bedding.

[0052] 4. The present invention is more convenient to operate. The entire sampling process only requires the laying of a large-scale horizontal model once, and samples of the required bedding angle, shape and size can be flexibly drilled according to test requirements. This overcomes the operational disadvantages of frequently moving or adjusting the model angle during traditional sample drilling, greatly simplifies the operation process, and reduces the operation difficulty and labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 The present invention is a schematic structural diagram of a device for preparing rock samples containing different beddings and layer inclinations.

[0054] Figure 2 It is a structural schematic diagram of the test box of the present invention.

[0055] Figure 3 It is a partial cross-sectional view of the cooperation relationship between the test box and the N-shaped frame of the present invention.

[0056] Figure 4 It is a partial combined structure diagram of the present invention, showing a swing arm, an angle adjustment frame and a drilling device.

[0057] Figure 5 yes Figure 4 Enlarged view of part A.

[0058] Figure 6 yes Figure 4 A schematic diagram of the structure of a part of the structure of the slider seat is shown.

[0059] Figure 7 It is a schematic diagram of the combined structure of the positioning plate, the correction plate and two N-shaped frames of the present invention.

[0060] Figure 8 This is a schematic diagram of the installation process of two N-shaped frames of the present invention on the test box.

[0061] Fig. 9 The present invention is a diagram of the use status of a device for preparing rock samples containing different beddings and layer inclinations.

[0062] Fig.10 It is a schematic diagram of the process of the drill bit of the present invention taking samples on the left side, right side and upper side of the rock model.

[0063] Fig.11 It is a schematic diagram of the structure of the standard sample made by the present invention. DETAILED DESCRIPTION

[0064] In order to make the advantages and technical solutions of the present invention more clear and explicit, the present invention is described in detail below in conjunction with specific embodiments.

[0065] Embodiment 1, combination Figures 1 to 9 , a device for preparing rock samples with different bedding and layer dip angles, especially suitable for the preparation of shale samples, comprising a base 1, a test box 2, a swing arm 3, an angle adjustment frame 4, a drilling device 5, a positioning correction device and an electric control unit, wherein the base 1 is a square flat plate that can be fixed on the ground or a workbench, and two guide rails 11 with square cross sections are laid on the upper surface of the base 1, and the two guide rails 11 are fixedly installed on the base 1 in parallel and one behind the other. Preferably, the upper surface of the guide rail 11 has a plurality of rollers arranged at intervals along the length direction thereof, and all the rollers are rotatably installed on the inner side of the guide rail in an embedded manner, and the upper surface heights of the rollers on the same guide rail 11 are consistent.

[0066] The test box 2 is a square box with an open top. Both the left and right sides of the test box 2 are detachable. The test box 2 is arranged above the base 1 through two guide rails 11. An adjustable foot 12 is installed at each of the four corners of the bottom. The height of the adjustable foot 12 is adjustable. When the adjustable foot 12 contacts the ground and supports the test box 2, the flatness of the test box 2 is adjusted through the adjustable foot 12 to keep the test box 2 in a horizontal state. After the adjustable foot 12 leaves the ground, the two guide rails 11 support the bottom of the test box 2, and the bottom of the test box 2 slides with the upper surface of the guide rails 11.

[0067] The test box 2 includes a bottom plate 21, a front side plate 22, a rear side plate 23, a left side plate 24 and a right side plate 25. The front side plate 22 and the rear side plate 23 are vertically arranged on the front and rear sides of the bottom plate 21, and the lower ends of the front side plate 22 and the rear side plate 23 are fixedly connected to the bottom plate 21. The left side plate 24 and the right side plate 25 are vertically arranged between the front side plate 22 and the rear side plate 23. The front and rear ends of the left side plate 24 and the right side plate 25 are respectively plugged and fixedly connected to the opposite side walls of the front side plate 22 and the rear side plate 23.

[0068] The front side wall of the rear side plate 23 has two T-shaped slide grooves 26 arranged on the left and the right, and the rear side wall of the front side plate 22 has two identical T-shaped slide grooves 26 corresponding to the positions of the rear side plate 23. The front and rear ends of the left side plate 24 and the right side plate 25 are provided with a long strip of T-shaped sliders 261 integral therewith, and each T-shaped slider 261 is slidably matched with the corresponding T-shaped slide groove 26, and the left and right ends of the front side plate 22 and the rear side plate 23 both protrude outward relative to the outer wall of the left side plate 24 or the right side plate 25.

[0069] The T-shaped sliders 261 at the front and rear ends of the left side plate 24 and the right side plate 25 can be inserted from top to bottom into the T-shaped chute 26 corresponding to the front side plate 22 and the rear side plate 23, and after reaching the surface of the bottom plate 21, the left and right sides of the test box 2 are closed. After the left side plate 24 and the right side plate 25 are lifted up until the T-shaped sliders 261 at the front and rear ends thereof are disengaged from the corresponding T-shaped chute 26, the left side plate 24 and the right side plate 25 are removed from the test box 2, and the side of the rock model 9 formed in the test box 2 can be sampled.

[0070] A limit plate 27 is fixedly provided at the bottom of the test box 2, and the front and rear sides of the limit plate 27 are respectively slidably matched with the side walls of the two guide rails 11. The front side of the bottom plate 21 has a horizontally arranged level ruler 28, and the level ruler 28 is used to detect the horizontality of the test box 2 in the left and right directions. The right side of the limit plate 27 has a vertically arranged level ruler 29, and the level ruler 29 is used to detect the horizontality of the test box 2 in the front and rear directions. When the bubbles in the level rulers 1 28 and 29 are both in the middle position, it indicates that the test box 2 is in a horizontal state.

[0071] The positioning and correction device includes two N-shaped frames 6, which are detachably mounted on the front and rear sides of the test box 2, respectively. The N-shaped frame 6 is an integrated structure composed of a crossbeam 61 and two columns 62, and the N-shaped frame 6 has high rigidity. The side walls of the adjacent sides of the two columns 62 are provided with vertical grooves 621 that match the left and right ends of the front side plate 22 or the rear side plate 23, and the vertical grooves 621 extend to the lower end surface of the column 62. The N-shaped frame 6 can be installed and fixed on the front side plate 22 or the rear side plate 23. When installing, the N-shaped frame 6 is placed above the front side plate 22 or the rear side plate 23, and the left and right ends of the front side plate 22 or the rear side plate 23 are respectively aligned with the vertical grooves 621 on the left and right inner sides of the N-shaped frame 6 and enter the vertical grooves 621. The N-shaped frame 6 falls to the bottom of its crossbeam 61 and contacts the top surface of the front side plate 22 or the rear side plate 23, completing the fixing of the N-shaped frame 6 on the test box 2.

[0072] A positioning plate 65 and a correction plate 66 are provided between the two N-shaped frames 6. The front and rear ends of the positioning plate 65 and the correction plate 66 are slidably matched with the top and left and right sides of the two N-shaped frames 6 through a square slider 64. In addition, the positioning plate 65 and the correction plate 66 can be rotated relative to the two N-shaped frames 6 respectively to adjust their inclination angles.

[0073] The N-shaped frame 6 is provided with a slideway 63 of the same shape. Specifically, the inner sides of the crossbeam 61 and the column 62 respectively have straight grooves along their length directions. The cross-section of the straight grooves matches the square slider 64. Both ends of the straight groove in the crossbeam 61 are connected to the upper ends of the straight grooves in the two columns 62 to form the slideway 63.

[0074] In addition, the front and rear ends of the positioning plate 65 and the correction plate 66 are respectively rotatably connected to the corresponding square sliders 64, and the two square sliders 64 located on the front N-shaped frame 6 are both provided with a second locking block 69, which fixes the positioning plate 65 or the correction plate 66 to the corresponding square slider 64.

[0075] Specifically, the main body of the square slider 64 is a cube, and it has a limit portion extending outward on the opposite side of the two N-shaped frames 6. The square slider 64 is located inside the slideway 63 and slides with the top of the N-shaped frame 6 horizontally, and can also slide with the left and right sides of the N-shaped frame 6 vertically. An angle plate 68 is fixed to the front side of the two square sliders 64 located in the rear N-shaped frame 6. The positioning plate 65 and the correction plate 66 are both strip-shaped rectangular flat plates, and the third rotating shaft 67 is fixed at both the front and rear ends. The center line of the positioning plate 65 or the correction plate 66 coincides with the axis of the third rotating shaft 67 located at both ends. The positioning plate 65 or the correction plate 66 can rotate relative to the square slider 64 around the axis of the third rotating shaft 67 at both ends, and the positioning plate 65 or the correction plate 66 is adjusted to a set tilt angle.

[0076] The third rotating shaft 67 located at the front side passes through the corresponding square slider 64 and extends to the inside of the second locking block 69. The second locking block 69 is provided with a second locking bolt that can lock the third rotating shaft 67. The third rotating shaft 67 located at the rear side is fixed with a pointer 681 that matches the angle plate 68. Its rear end passes through the corresponding square slider 64 and is provided with a locking nut. The positioning plate 65 or the correction plate 66 slides with the two N-shaped frames 6 through the square sliders 64 at the front and rear ends to adjust its position on the N-shaped frame 6. When the square slider 64 reaches the end of the straight groove of the crossbeam 61, it moves downward to enter the straight groove in the column 62 and slides vertically with the left and right sides of the N-shaped frame 6. At this time, the positioning plate 65 and the correction plate 66 are on the side of the test box 2, and are used to sample the side of the rock model formed in the test box 2.

[0077] When in use, the inclination angle of the positioning plate 65 or the correction plate 66 is adjusted by the pointer 681, and then the second locking bolt is tightened to lock the second locking block 69 to the third rotating shaft 67 at the front end of the positioning plate 65 or the correction plate 66. The positioning plate 65 or the correction plate 66 is fixed to the square slider 64 on the front side to keep the angle changed. After the positioning plate 65 or the correction plate 66 moves to the set position, the locking nut is tightened to fix the positioning plate 65 or the correction plate 66 to the two N-shaped frames 6 through the square sliders 64 at both ends.

[0078] The electric control unit comprises a distribution box and a controller. The distribution box is connected to the mains to supply power to the electric equipment of the present invention. The controller is an existing controller in the prior art.

[0079] There are two swing arms 3, which are symmetrically arranged on the outside of the two guide rails 11 front and back. The lower end of each swing arm 3 is rotatably connected to the base 1 through a hinge support 32. A first rotating shaft 31 is fixed to the lower end of each swing arm 3. The two first rotating shafts 31 are coaxially arranged and are rotatably connected to the hinge supports 32 respectively. The hinge supports 32 are fixed on the upper surface of the base 1, and the swing arm 3 swings left and right around the first rotating shaft 31.

[0080] The two hinge supports 32 are provided with swing arm driving mechanisms on the sides facing away from each other, and the two swing arm driving mechanisms respectively drive the two swing arms 3 to move synchronously. Specifically, the swing arm driving mechanism includes a worm wheel 71, a worm 72 and a stepper motor 73. The worm wheel 71 is fixedly mounted on the first rotating shaft 31, the worm 72 is horizontally arranged below the worm wheel 71 and is threadedly matched with the worm wheel 71, and the stepper motor 73 is fixed to the base 1, and its output shaft drives the worm 72 to rotate forward or reversely. The signal end of the stepper motor 73 is connected to the controller for communication. The controller is equipped with a control handle, which is used to adjust the rotation direction and angle of the output shaft of the stepper motor 73, and then the tilt angle of the swing arm 3 is controlled by a pulse command, and the two swing arms 3 are always kept in sync.

[0081] One side of each swing arm driving mechanism is provided with a braking mechanism which can fix the swing arm 3 on the same side. Specifically, the braking mechanism includes a guide rod bracket 81, a brake block 82, a brake disc 83, a bidirectional screw and a stepper motor 84. The brake disc 83 is fixedly mounted on the first rotating shaft 31. The guide rod bracket 81 is fixed above the base 1 through a mounting plate. There are two brake blocks 82 which are symmetrically arranged on the front and rear sides of the brake disc 83 and are longitudinally slidably matched with the guide rod bracket 81.

[0082] The second stepper motor 84 is fixed to the front outside of the guide rod bracket 81, and the bidirectional screw rod passes through the two brake blocks 82 and is respectively threaded with the two brake blocks 82. One end of the bidirectional screw rod is fixedly connected to the output shaft of the second stepper motor 84, and the other end is rotatably connected to the guide rod bracket 81. The second stepper motor 84 drives the two brake blocks 82 through the bidirectional screw rod to clamp the brake disc 83, so that the swing arm 3 is fixedly connected to the base 1. The signal end of the second stepper motor 84 is connected to the controller for communication, and the two brake blocks 82 are operated by the button of the control handle to clamp the brake disc 83 or release the brake disc 83. After the angle of the swing arm 3 is adjusted to the right position, the two brake blocks 82 clamp the brake disc 83 to keep the angle of the swing arm 3 unchanged.

[0083] A slider seat 33 is provided in the middle and upper part of the swing arm 3 and is adjustably fixed thereto. Specifically, the middle and upper part of the swing arm 3 has a through groove 34 opened along its length direction. The slider seat 33 is embedded in the through groove 34 and slidably cooperates with the swing arm 3. Two vertical plates 35 are symmetrically provided on the left and right sides of the swing arm 3. One end of the two vertical plates 35 is an integral structure with the slider seat 33, and the vertical plates 35 slidably cooperate with the outer wall of the swing arm 3.

[0084] A group of bolt holes 36 are provided on the left and right side walls of the swing arm 3, and each group of bolt holes 36 includes a plurality of bolt holes 36 arranged at equal intervals along the length direction of the swing arm 3. Two fastening bolts are provided on each vertical plate 35, and the fastening bolts can be screwed into the bolt holes 36 to fix the slider seat 33 on the swing arm 3.

[0085] The angle adjustment frame 4 is arranged longitudinally and horizontally between the two swing arms 3, and its front and rear ends are respectively connected to the two slider seats 33 for rotation. The two slider seats 33 are provided with a first locking block 37 that fixes the angle adjustment frame 4 to the slider seats 33 on the sides facing away from each other.

[0086] The angle adjustment frame 4 includes two square shafts 41 arranged in parallel and spaced apart in the longitudinal direction. The front ends and rear ends of the two square shafts 41 are fixedly connected to form a whole through a circular disk 42 respectively. The two circular disks 42 are arranged coaxially.

[0087] A second rotating shaft 43 is fixed to the opposite side of the two discs 42, and the two second rotating shafts 43 are coaxially arranged. One end of the second rotating shaft 43 is connected to the center of the disc 42 as a whole. The second rotating shaft 43 is penetrated by the inner side of the slider seat 33 on the same side and rotatably cooperates with the slider seat 33. The other end of the second rotating shaft 43 is located in the first locking block 37. The first locking block 37 is provided with a first locking bolt that can lock the second rotating shaft 43.

[0088] The angle adjustment frame 4 can rotate relative to the swing arm 3 through the second rotating shafts 43 at both ends thereof. After the angle of the angle adjustment frame 4 is adjusted to the right position, the second rotating shaft 43 and the slider seat 33 are locked by the first locking block 37 located on the slider seat 33, so that the angle of the angle adjustment frame 4 relative to the swing arm 3 remains unchanged.

[0089] The drilling device 5 includes a motor mounting frame 51, a servo motor 52, a threaded drill rod 53 and a drill bit 54. The motor mounting frame 51 is arranged on the angle adjustment frame 4 and is fixedly connected to the angle adjustment frame 4 so that the front and rear relative positions can be adjusted. Two square shafts 41 are passed through the inner side of the motor mounting frame 51. The motor mounting frame 51 and the square shafts 41 are longitudinally slidably matched. A positioning bolt 55 is provided on one side of the motor mounting frame 51, and the positioning bolt 55 fixes the motor mounting frame 51 on the square shaft 41.

[0090] The servo motor 52 is fixed to the top of the motor mounting frame 51, and its output shaft adopts a hollow shaft. The threaded drill rod 53 is slidably arranged inside the hollow shaft, and a nut seat matching with the threaded drill rod 53 is arranged at the lower part of the motor mounting frame 51. Specifically, a keyway 531 along its axial direction is opened on the circumferential side wall of the threaded drill rod 53, and a flat key matching with the keyway 531 is fixed on the inner side wall of the hollow shaft, and the nut seat is fixed to the lower part of the motor mounting frame 51, and the threaded drill rod 53 passes through the nut seat and matches with its thread.

[0091] The drill bit 54 is cylindrical with a closed top, and its lower end surface is a toothed structure. The lower end of the threaded drill rod 53 passes through the nut seat and is detachably fixedly connected to the upper end of the drill bit 54. The drill bit 54 and the threaded drill rod 53 are coaxially arranged and the connection method adopts the existing technology, which is convenient for replacing drill bits of different specifications to meet the test requirements of drilling rock samples of different sizes. The servo motor 52 drives the drill bit 54 to rotate and move along its axial direction through the threaded drill rod 53. During operation, after the position and inclination angle of the swing arm 3 and the angle adjustment frame 4 are locked, the inclination angle of the threaded drill rod 53 is also determined, and the servo motor 52 is started. The servo motor 52 drives the threaded drill rod 53 to rotate and move along the axial direction of the threaded drill rod 53, approaching the surface of the rock model to drill the rock sample.

[0092] Embodiment 2, combined Figures 1 to 11A method for preparing rock samples containing different bedding and layer plate inclination angles, using the above-mentioned device for preparing rock samples containing different bedding and layer plate inclination angles, the method comprises the following steps:

[0093] Step 1: According to the relevant parameters and similarity ratios of the strata and bedding in the real layered rock mass, the strata similar material ratio and the bedding similar material ratio are determined respectively, and the strata similar material and the bedding similar material are prepared.

[0094] Adjust the adjustable feet 12 at the bottom of the test box 2 to make the bottom surface of the test box 2 in a horizontal state. Then, lay layer-similar materials and bedding-similar materials of predetermined thickness alternately from bottom to top inside the test box 2. After laying each layer of layer-similar materials or bedding-similar materials, they need to be leveled and compacted until the rock model 9 is laid. After curing, the rock model 9 reaches a predetermined strength. The thickness of the layer 91 and bedding 92 of the rock model 9 is determined according to the experimental requirements.

[0095] Step 2: Remove the left side plate 24 and the right side plate 25 of the test box 2, and then install the two N-shaped frames 6 on the front side plate 22 and the rear side plate 23 of the test box 2 respectively, with the bottom of the crossbeam of the N-shaped frame 6 close to the upper end of the front side plate 22 or the rear side plate 23.

[0096] The adjustable feet 12 at the bottom of the test box 2 are adjusted to make it leave the ground, and the test box 2 falls onto the guide rails 11 .

[0097] Move the test box 2 and the rock model 9 inside it along the guide rail 12 to between the two swing arms 3, with the two hinge supports 32 in the middle of the test box 2, and adjust the adjustable feet 12 at the bottom of the test box 2 again to make the test box 2 rise. The bottom of the test box 2 is separated from the guide rail 12 and is in a horizontal state under the support of the four adjustable feet 12.

[0098] Step 3: According to the sampling position and sampling angle at the top of the rock model 9, the positioning plate 65 and the correction plate 66 are moved to both sides of the sampling position, and the angles of the positioning plate 65 and the correction plate 66 are adjusted to be consistent with the sampling angle.

[0099] Afterwards, the front and rear ends of the positioning plate 65 are fixedly connected to the two N-shaped frames 6, and the correction plate 66 is fixedly connected to the square slider 64 at its front end. At this time, the correction plate 66 can slide on the two N-shaped frames 6 through the square sliders 64 at its front and rear ends.

[0100] Step 4: Drive the swing arm 3 to rotate toward one side of the sampling position through the swing arm driving mechanism, start the servo motor 52, and the servo motor 52 drives the drill bit 54 to move downward to the upper surface close to the rock model 9, then stops moving, and the drill bit 54 is between the positioning plate 65 and the correction plate 66.

[0101] The angle of the swing arm 3 is adjusted again by the swing arm driving mechanism, and at the same time, the angle adjustment frame 4 is rotated to make the drill bit 54 approach one side of the positioning plate 65, and the circumferential side wall of the drill bit 54 is completely fitted with the side wall of the positioning plate 65. After that, the correction plate 65 moves toward the drill bit, and its side wall is completely fitted with the circumferential side wall of the drill bit 54, so that the correction plate 66 is fixedly connected to the two N-shaped frames 3.

[0102] The swing arm 3 is locked by the brake mechanism, and the first locking block 37 locks the front and rear ends of the angle adjustment frame 4 . The two ends of the angle adjustment frame 4 are fixedly connected to the two swing arms 3 , respectively.

[0103] Step 5: Release the fixed connection between the positioning plate 65 and the correction plate 66 and the two N-shaped frames 3, and move the positioning plate 65 and the correction plate 66 to the two sides of the drill bit 54 respectively, and lock and fix the motor mounting frame 51 and the angle adjustment frame 4.

[0104] The servo motor 52 is started again, the drill bit 54 rotates forward to contact the rock model 9 and drill downward to obtain the rock sample. After reaching the set drilling depth, the drill bit 54 reverses to take out the rock sample. Afterwards, the sampling position and / or sampling angle of the drill bit 54 is adjusted and repeated sampling is performed multiple times at the top of the rock model 9 in the above manner.

[0105] Step 6: After sampling at the top of the rock model 9 is completed, the angle adjustment frame 4, the drilling device 5, the positioning plate 65 and the correction plate 66 are adjusted to the side of the rock model 9, and steps 3 to 5 are repeated. The drilling device 5 completes sampling on the side of the rock model 9.

[0106] The drilled rock samples are cut and polished into standard samples 93 as required for use.

[0107] Parts not described in the present invention can be implemented by adopting or drawing on existing technologies.

[0108] Furthermore, the terms “first” and “second” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0109] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0110] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A device for preparing rock samples containing different bedding and stratum inclination angles, characterized in that: It includes a base, a test box, a swing arm, an angle adjustment frame, a drilling device, a positioning correction device and an electric control unit. The test box is a square box with an open top and detachable left and right sides. The test box is set above the base through two guide rails, and each of the four corners of the bottom is provided with an adjustable foot. There are two swing arms, which are symmetrically arranged on the outside of the two guide rails. The lower end of each swing arm is rotatably connected to the base through a hinge support. The two hinge supports are provided with swing arm driving mechanisms on the sides facing away from each other. The two swing arm driving mechanisms respectively drive the two swing arms to move synchronously. A brake mechanism that can fix the swing arm on the same side is provided on one side of each swing arm driving mechanism. A slider seat is provided at the middle and upper part of the swing arm and is adjustable and fixed thereto. The angle adjustment frame is arranged longitudinally and horizontally between the two swing arms, and its front and rear ends are respectively connected to the two slider seats for rotation. The two slider seats are provided with a first locking block fixedly connecting the angle adjustment frame and the slider seat on the sides facing away from each other. The drilling device comprises a motor mounting frame, a servo motor, a threaded drill rod and a drill bit. The motor mounting frame is arranged on the angle adjustment frame and is fixedly connected to the angle adjustment frame so that the front and rear relative positions can be adjusted. The servo motor is fixed on the top of the motor mounting frame, and its output shaft adopts a hollow shaft. The threaded drill rod is slidably inserted into the inner side of the hollow shaft, a nut seat matching the threaded drill rod is provided at the lower part of the motor mounting frame, the lower end of the threaded drill rod passes through the nut seat and is detachably fixedly connected to the upper end of the drill bit, and the servo motor drives the drill bit to rotate and move along its axial direction through the threaded drill rod; The positioning and correction device comprises two N-shaped frames detachably mounted on the front and rear sides of the test box, a positioning plate and a correction plate are arranged between the two N-shaped frames, and the front and rear ends of the positioning plate and the correction plate are slidably matched with the top and left and right sides of the two N-shaped frames through a square slider; In addition, the front and rear ends of the positioning plate and the correction plate are respectively rotatably connected to the corresponding square sliders, and the two square sliders located on the front N-shaped frame are provided with a second locking block, which fixes the positioning plate or the correction plate to the corresponding square slider.

2. The device for preparing rock samples containing different bedding and layer inclination angles according to claim 1, characterized in that: The test box comprises a bottom plate, a front side plate, a rear side plate, a left side plate and a right side plate, the lower ends of the front side plate and the rear side plate are fixedly connected to the bottom plate, the left side plate and the right side plate are vertically arranged between the front side plate and the rear side plate, and the front and rear ends of the left side plate and the right side plate are respectively plugged and fixedly connected to the opposite side walls of the front side plate and the rear side plate; The front side wall of the rear side plate is provided with two T-shaped sliding grooves arranged one on the left and one on the right, and the rear side wall of the front side plate is provided with two identical T-shaped sliding grooves corresponding to the positions of the rear side plates one by one; The left and right side panels are provided with integrated long T-shaped sliders at both front and rear ends, and each T-shaped slider is slidably matched with the corresponding T-shaped slot. The left and right ends of the front and rear side panels extend out of the outer wall of the left or right side panel.

3. The device for preparing rock samples containing different bedding and layer inclination angles according to claim 2, characterized in that: The cross section of the guide rail is square, two guide rails are arranged in parallel on the base, and the surface of the guide rail has a plurality of rollers arranged at intervals along the length direction thereof; A limit plate is fixedly provided at the bottom of the test box, and the front and rear sides of the limit plate are respectively slidably matched with the side walls of the two guide rails. The front side of the bottom plate has a horizontal ruler 1 arranged horizontally, and the right side of the limit plate has a horizontal ruler 2 arranged vertically.

4. The device for preparing rock samples containing different bedding and layer inclination angles according to claim 1, characterized in that: A first rotating shaft is fixed at the lower end of each swing arm, and the two first rotating shafts are coaxially arranged and respectively connected to the hinge support for rotation. The swing arm driving mechanism includes a worm wheel, a worm and a stepper motor. The worm wheel is fixedly mounted on the first rotating shaft, the worm is transversely arranged below the worm wheel and matched with the thread thereof, and the stepper motor is fixed to the base, and its output shaft drives the worm to rotate forward or reversely. The brake mechanism includes a guide rod bracket, a brake block, a brake disc, a bidirectional screw and a stepper motor. The brake disc is fixedly mounted on the first rotating shaft. The guide rod bracket is fixed on the top of the base through a mounting plate. There are two brake blocks, which are symmetrically arranged on the front and rear sides of the brake disc and are longitudinally slidably matched with the guide rod bracket. Stepper motor 2 is fixed to the outside of the front side of the guide rod bracket, and the bidirectional lead screw passes through the two brake blocks and respectively cooperates with the two brake block threads. One end of the bidirectional lead screw is fixedly connected to the output shaft of stepper motor 2, and the other end is rotatably connected to the guide rod bracket. Stepper motor 2 drives the two brake blocks through the bidirectional lead screw to clamp the brake disc, thereby fixing the swing arm and the base.

5. The device for preparing rock samples with different bedding and layer inclination angles according to claim 1, characterized in that: The middle and upper part of the swing arm has a through groove opened along its length direction, the slider seat is embedded in the through groove and slidably cooperates with the swing arm, and two vertical plates are symmetrically arranged on the left and right sides of the swing arm, one end of the two vertical plates is an integral structure with the slider seat, and the vertical plates are slidably cooperated with the outer wall of the swing arm; A group of bolt holes are provided on the left and right side walls of the swing arm, and each group of bolt holes includes multiple bolt holes arranged at equal intervals along the length direction of the swing arm. Two fastening bolts are provided on each vertical plate, and the fastening bolts can be screwed into the bolt holes to fix the slider seat on the swing arm.

6. The device for preparing rock samples with different bedding and layer inclination angles according to claim 5, characterized in that: The angle adjustment frame comprises two square shafts which are longitudinally arranged in parallel and spaced apart, the front ends and rear ends of the two square shafts are respectively fixedly connected to form a whole through a disc, and the two discs are coaxially arranged; A second rotating shaft is fixed to each side of the two discs, and the two second rotating shafts are coaxially arranged. One end of the second rotating shaft is connected to the center of the disc as a whole. The second rotating shaft passes through the inner side of the slider seat on the same side and rotates with the slider seat. The other end of the second rotating shaft is located in the first locking block, and the first locking block is provided with a first locking bolt that can lock the second rotating shaft.

7. The device for preparing rock samples containing different bedding and layer inclination angles according to claim 6, characterized in that: Two square shafts are inserted into the inner side of the motor mounting frame, the motor mounting frame and the square shafts are longitudinally slidably matched, and a positioning bolt is provided on one side of the motor mounting frame, and the positioning bolt fixes the motor mounting frame on the square shaft; A keyway is provided along the axial direction of the threaded drill rod on the circumferential side wall, a flat key matching the keyway is fixed on the inner side wall of the hollow shaft, a nut seat is fixed to the lower part of the motor mounting frame, the threaded drill rod passes through the nut seat and matches with its thread, the drill bit is a cylindrical shape with a closed top, and its lower end surface is a toothed structure; When the servo motor drives the threaded drill rod to rotate, the threaded drill rod moves linearly relative to the motor mounting frame.

8. The device for preparing rock samples containing different bedding and layer inclination angles according to claim 2, characterized in that: The N-shaped frame is provided with a slideway of the same shape as the N-shaped frame. The main body of the square slider is a cube, and is located on the opposite side of the two N-shaped frames and has a limit portion extending outward. The square slider is located on the inner side of the slideway and is laterally slidably matched with the top of the N-shaped frame, and can also be vertically slidably matched with the left and right sides of the N-shaped frame. An angle plate is fixed to the front side of the two square sliders in the rear N-shaped frame. The positioning plate and the correction plate are both strip-shaped rectangular flat plates. The third rotating shaft is fixed to the front and rear ends. The center line of the positioning plate or the correction plate coincides with the axis of the third rotating shaft located at both ends. The third rotating shaft located on the front side passes through the corresponding square slider and extends to the inner side of the second locking block. The second locking block is provided with a second locking bolt that can lock the third rotating shaft. The third rotating shaft located on the rear side is fixed with a pointer that matches the angle disk, and its rear end passes through the corresponding square slider and is provided with a locking nut.

9. The device for preparing rock samples containing different beddings and stratum inclinations according to claim 8, characterized in that: The N-shaped frame is an integrated structure consisting of a crossbeam and two uprights, and the adjacent sides of the two uprights are each provided with a vertical groove that matches the end of the front side plate or the rear side plate; The inner sides of the crossbeam and the column are respectively provided with straight grooves along their length direction, the cross section of the straight grooves matches the square slider, and the two ends of the straight grooves in the crossbeam are connected with the upper ends of the straight grooves in the two columns to form the slideway.

10. A method for preparing rock samples containing different bedding and stratum inclination angles, characterized in that: Based on the device for preparing rock samples containing different bedding and layer inclination angles according to any one of claims 1 to 9, the method comprises the following steps: Step 1: According to the relevant parameters and similarity ratios of the strata and the bedding in the real layered rock mass, the strata similar material ratio and the bedding similar material ratio are determined respectively, and the strata similar material and the bedding similar material are prepared; Adjust the adjustable feet at the bottom of the test box to make the bottom surface of the test box horizontal. Then, lay the layer-like materials and bedding-like materials of predetermined thickness alternately from bottom to top inside the test box. After laying each layer of layer-like materials or bedding-like materials, they need to be leveled and compacted until the rock model is laid and reaches the predetermined strength after curing. Step 2: Remove the left and right panels of the test box, and then install two N-shaped frames on the front and rear panels of the test box respectively, with the bottom of the crossbeam of the N-shaped frame attached to the upper end of the front or rear panel; Adjust the adjustable feet at the bottom of the test box to make it leave the ground, and then drop the test box onto the guide rails; Move the test box and the rock model inside it along the guide rail to between the two swing arms, with the two hinged supports in the middle of the test box. Adjust the adjustable feet at the bottom of the test box again to raise the test box. The bottom of the test box is in a horizontal state after leaving the guide rail. Step 3: According to the sampling position and sampling angle at the top of the rock mass model, move the positioning plate and the correction plate to both sides of the sampling position, and adjust the angles of the positioning plate and the correction plate to be consistent with the sampling angle; Afterwards, the positioning plate is fixedly connected to the two N-shaped frames, and the correction plate is fixedly connected to the square slider at its front end. At this time, the correction plate can slide on the two N-shaped frames through the square sliders at its front and rear ends; Step 4: The swing arm driving mechanism drives the swing arm to rotate toward one side of the sampling position, and the servo motor is started. The servo motor drives the drill bit to move downward to the upper surface close to the rock model, and then stops moving. The drill bit is between the positioning plate and the correction plate. The angle of the swing arm is adjusted again by the swing arm driving mechanism, and the angle adjustment frame is rotated to make the drill bit approach one side of the positioning plate, so that the circumferential side wall of the drill bit is completely fitted with the side wall of the positioning plate. After that, the correction plate moves toward the drill bit, and its side wall is completely fitted with the circumferential side wall of the drill bit, so that the correction plate is fixedly connected to the two N-shaped frames; The swing arm is locked by a brake mechanism, and the first locking block locks the front and rear ends of the angle adjustment frame, and the two ends of the angle adjustment frame are fixedly connected to the two swing arms respectively; Step 5: Move the positioning plate and the correction plate to both sides of the drill bit, and lock the motor mounting bracket and the angle adjustment bracket; The servo motor is started again, the drill bit rotates forward to contact the rock model and drill downward to take the rock sample. After reaching the set drilling depth, the drill bit reverses to take out the rock sample. After that, the sampling position and / or sampling angle of the drill bit is adjusted and the sampling is repeated multiple times at the top of the rock model in the above manner. Step 6: After sampling is completed on the top of the rock model, the angle adjustment frame, the drilling device, the positioning plate and the correction plate are adjusted to the side of the rock model, and steps 3 to 5 are repeated. The drilling device completes sampling on the side of the rock model. The drilled rock samples are cut and polished into standard samples as required for use.

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