Rock test piece loading table for blasting experiment

Abstract

The utility model discloses a rock test piece loading platform for a blasting experiment, which relates to the technical field of high ground stress ultra-deep hole rock mass blasting experiments and comprises a top plate and a base which are arranged in parallel up and down, the top plate is connected with the base through a lifting device, and four supporting legs are fixedly arranged at the bottom of the base. The bottoms of the supporting legs are connected with rail wheels, two symmetrically-arranged rails are laid below the base, and the two rail wheels located on the same side can roll on the corresponding rails. A test piece frame is fixedly arranged at the top of the top plate, and a rock test piece is clamped in the test piece frame; a conveying device is arranged on one side of the base and is used for conveying a rock test piece. The device can drive the rock test piece to change the position, and then blast holes can be drilled in different positions of the surrounding rock test piece according to needs.

Description

Technical Field

[0001] The utility model relates to the technical field of high-in-situ stress ultra-deep hole rock mass blasting experiments, in particular to a rock specimen loading platform for blasting experiments. Background Art

[0002] Blasting is an important rock breaking method in tunnel excavation. Deep coal mines often have the characteristics of high ground stress, which can easily lead to various safety hazards during blasting excavation. Therefore, it is of great significance to carry out deep hole blasting experimental research on high ground stress rock mass, improve the theory of rock mass blasting fracture under high ground stress, and provide a theoretical basis for high ground stress tunnel surrounding rock blasting excavation engineering.

[0003] At present, during the rock blasting experiment, it is first necessary to place the rock specimen on the specimen table, adjust its position, and give the drilling system hydraulic motor an initial rotation amount and the thrust cylinder an initial thrust oil pressure by controlling the multi-way control valve, the rotation control handle and the thrust control handle, so as to obtain a constant thrust force and start the blasting test. During the test, in order to ensure the accuracy of the data, it is necessary to drill holes at different positions of the rock specimen for loading blasting drugs. However, the position of the drilling system is generally fixed. Therefore, during the current test, only holes can be drilled at fixed positions, and holes cannot be drilled at different positions of the rock specimen as needed. Utility Model Content

[0004] The utility model aims to provide a rock specimen loading platform for blasting experiments to solve the problems existing in the above-mentioned prior art, so that the specimen platform can drive the surrounding rock specimen to change position, and then holes can be drilled at different positions of the surrounding rock specimen as needed.

[0005] To achieve the above purpose, the utility model provides the following solutions:

[0006] The utility model provides a rock specimen loading platform for blasting experiments, comprising a top plate and a base arranged in parallel up and down, the top plate and the base being connected via a lifting device, four legs being fixedly arranged at the bottom of the base, track wheels being connected to the bottoms of the legs, two symmetrically arranged tracks being laid below the base, and two track wheels located on the same side can roll on the corresponding tracks; a specimen rack is fixedly arranged at the top of the top plate, and the inside of the specimen rack is used for clamping rock specimens; a conveying device is arranged at one side of the base, and the conveying device is used for conveying rock specimens.

[0007] Optionally, the lifting device includes a first support rod, a second support rod and a cylinder, the lower portion of the first support rod is hingedly connected to the base, and the upper portion of the first support rod is provided with a roller capable of rolling on the bottom of the top plate; the upper portion of the second support rod is hingedly connected to the top plate, and the lower portion of the second support rod is provided with a roller capable of rolling on the top of the base, the first support rod and the second support rod are arranged in an "X" shape and are hingedly connected, the cylinder is provided between the first support rod and the second support rod, the cylinder barrel of the cylinder is hingedly connected to the lower portion of the first support rod, the end of the piston rod of the cylinder is hingedly connected to a connecting rod, and the end of the connecting rod away from the piston rod of the cylinder is hinged to the upper portion of the second support rod.

[0008] Optionally, the conveying device includes a conveying frame, on which a plurality of rollers are evenly and parallelly arranged, the roller shafts at both ends of the rollers are arranged on the conveying frame through bearings, roller gears are fixedly installed at the ends of the roller shafts at one end of the plurality of rollers, the plurality of roller gears are connected by a closed roller chain transmission, and the end of the roller shaft farthest from the base is connected by a roller motor.

[0009] Optionally, a conveying base is provided under the conveying frame, a plurality of hydraulic cylinders are fixedly provided on the top of the conveying base, and the piston rods of the hydraulic cylinders are fixedly connected to the bottom of the conveying frame through a top support frame; a plurality of self-locking wheels are connected to the bottom of the conveying base.

[0010] Optionally, the base is provided with a driving device capable of driving the track wheel to move; the driving device includes a motor fixed to the base, and a transmission mechanism arranged between the motor output shaft and the track wheel shaft, the transmission mechanism includes a driving sprocket fixed to the motor output shaft, a rotating shaft rotatably installed on the base, a driven sprocket fixed to the middle of the rotating shaft and cooperating with the driving sprocket, a first sprocket fixed to both ends of the rotating shaft, and a second sprocket fixed to the track wheel shaft and cooperating with the first sprocket.

[0011] Optionally, the base is provided with a driving device capable of driving the track wheel to move; the driving device includes a motor fixed on the base, and a transmission mechanism arranged between the motor output shaft and the track wheel shaft, the transmission mechanism includes a driving pulley fixed on the motor output shaft, a rotating shaft rotatably installed on the base, a driven pulley fixed at the middle of the rotating shaft and cooperating with the driving pulley, a first pulley fixed at both ends of the rotating shaft, and a second pulley fixed on the track wheel shaft and cooperating with the first pulley.

[0012] Optionally, the base is provided with a driving device capable of driving the track wheel to move; the driving device includes a motor fixed to the base, and a transmission mechanism arranged between the motor output shaft and the track wheel shaft, the transmission mechanism includes a driving gear fixed to the motor output shaft, a rotating shaft rotatably installed on the base, a driven gear fixed to the middle of the rotating shaft and cooperating with the driving gear, a first sprocket fixed to both ends of the rotating shaft, and a second sprocket fixed to the track wheel shaft and cooperating with the first sprocket.

[0013] Optionally, a groove is provided on the top of the base and the bottom of the top plate respectively, and the rollers on the first support rod and the second support rod are in contact with and cooperate with the bottoms of the corresponding grooves respectively.

[0014] Optionally, the specimen rack includes a confining pressure loading device, a bracket, a loading steel plate and a first base, the bracket is arranged on the top of the first base, the bracket is used to place the rock specimen, the confining pressure loading device is fixed around the rock specimen through the bracket, the loading steel plate is arranged on the side of the rock specimen to be drilled, and a drilling rig through hole is opened on the loading steel plate; sliding limit grooves are symmetrically arranged at the upper and lower ends of the front of the bracket, and the loading steel plate is clamped in the sliding limit grooves, so that the loading steel plate can apply passive confining pressure to the front of the rock specimen under the pressure of the rear oil cylinder on the rock specimen. When drilling is required, the drill bit of the drilling rig is inserted into the drilling rig through hole to achieve drilling of the rock specimen.

[0015] Optionally, the confining pressure loading device blocks are respectively located on the pressure plates at the rear, top and both sides of the rock specimen, and the cross-sectional area of ​​the pressure plate is not less than the cross-sectional area of ​​the corresponding rock specimen, which can ensure that the pressure plate wraps the rock specimen in all directions, thereby providing comprehensive confining pressure; the end of the pressure plate away from the rock specimen is fixedly connected to the piston rod of the cylinder, and the cylinder is fixedly set on the bracket. In different embodiments, the cylinder can be set on only one side of the two sides, and a loading steel plate is set on the other side as in the front structure, so that the confining pressure effect on the rock specimen on both sides can be achieved through the cylinder pressure on one side, thereby reducing the cost.

[0016] Compared with the prior art, the utility model has achieved the following technical effects:

[0017] The utility model can transport a heavy rock specimen to the specimen rack through the transport device without manual lifting, thus saving manpower; the height of the specimen rack can be adjusted through the lifting device, and the left and right horizontal positions of the specimen rack can be adjusted through the track and the track wheels, so that the relative position of the rock specimen and the drilling rig can be adjusted as needed, which is convenient for drilling holes at different positions of the specimen. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the structure of a rock specimen loading platform for blasting experiments according to the utility model;

[0020] Figure 2 for Figure 1 A magnified schematic diagram of point A;

[0021] Figure 3 This is a right schematic diagram of the test specimen rack of the utility model after removing the loading steel plate;

[0022] Among them, 1- specimen rack, 101- bracket, 102- loading steel plate, 103- first support, 104- rock specimen, 105- sliding limit groove, 106- cylinder, 107- pressure plate, 2- base, 3- support leg, 4- track wheel axle, 5- track wheel, 6- track, 7- motor, 8- self-locking wheel, 9- driven sprocket, 10- rotating shaft, 11- first sprocket, 12- second sprocket, 13- chain, 14- top plate, 15- groove, 16- first support rod, 17- second support rod, 18- cylinder, 19- roller, 20- connecting rod, 21- conveying frame, 22- roller, 23- conveying base, 24- hydraulic cylinder, 25- top support frame. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The utility model aims to provide a rock specimen loading platform for blasting experiments to solve the problems existing in the above-mentioned prior art, so that the specimen platform can drive the surrounding rock specimen to change position, and then holes can be drilled at different positions of the surrounding rock specimen as needed.

[0025] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] The utility model provides a rock specimen loading platform for blasting experiments, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes a top plate 14 and a base 2 which are arranged in parallel up and down. The top plate 14 and the base 2 are connected by a lifting device. Four legs 3 are fixedly arranged at the bottom of the base 2. Track wheels 5 are connected to the bottom of the legs 3. Two symmetrically arranged tracks 6 are laid under the base 2. The two track wheels 5 on the same side can roll on the corresponding tracks 6. A specimen rack 1 is fixedly arranged on the top of the top plate 14. The specimen rack 1 is used to clamp the rock specimen 101. A conveying device is arranged on one side of the base 2. The conveying device is used to convey the rock specimen 101.

[0027] Specifically, the lifting device includes a first support rod 16, a second support rod 17 and a cylinder 18. The lower part of the first support rod 16 is hingedly connected to the base 2, and a roller 19 capable of rolling on the bottom of the top plate 14 is provided on the upper part of the first support rod 16; the upper part of the second support rod 17 is hingedly connected to the top plate 14, and the lower part of the second support rod 17 is provided with a roller 19 capable of rolling on the top of the base 2. The first support rod 16 and the second support rod 17 are arranged in an "X" shape and are hingedly connected. A groove 15 is provided on the top of the base 2 and the bottom of the top plate 14, respectively. The first support rod 16 and the second support rod 1 The rollers 19 on the first support rod 16 and the second support rod 17 are respectively in contact with the bottom of the corresponding groove 15, and the side of the groove 15 plays a role in limiting the roller 19. A cylinder 18 is provided between the first support rod 16 and the second support rod 17. The cylinder barrel of the cylinder 18 is hingedly connected to the lower part of the first support rod 16. The end of the piston rod of the cylinder 18 is hingedly connected to a connecting rod 20. The end of the connecting rod 20 away from the piston rod of the cylinder 18 is hingedly connected to the upper part of the second support rod 17. When the piston rod of the cylinder 18 is extended or retracted, it drives the relative movement of the first support rod 16 and the second support rod 17, so that the top plate 14 is moved closer to or farther from the base 2. The conveying device includes a conveying frame 21, and a plurality of rollers 22 are evenly arranged in parallel on the conveying frame 21. The roller shafts at both ends of the rollers 22 are arranged on the conveying frame 21 through bearings. The ends of the roller shafts at one end of the plurality of rollers 22 are fixedly installed with roller gears. The plurality of roller gears are connected by a closed roller chain transmission. The end of the roller shaft farthest from the base is connected by a roller motor. A conveying base 23 is arranged below the conveying frame 21, and a plurality of hydraulic cylinders 24 are fixedly arranged on the top of the conveying base 23, and the piston rods of the hydraulic cylinders 24 are fixedly connected to the bottom of the conveying frame 21 through the top support frame 25; a plurality of self-locking wheels 8 are connected to the bottom of the conveying base 23, so that the conveying device can be moved to the required position as needed, which is convenient for the transportation of the rock specimens 101 and saves manpower.

[0028] Further preferably, the base 2 is provided with a driving device capable of driving the track wheel to travel; the driving device comprises a motor 7 fixed on the base 2, and a transmission mechanism arranged between the output shaft of the motor 7 and the track wheel shaft 4, the transmission mechanism comprising a driving sprocket fixed on the output shaft of the motor 7, a rotating shaft 10 rotatably mounted on the base 2, a driven sprocket 9 fixed in the middle of the rotating shaft 10 and cooperating with the driving sprocket, a first sprocket 11 fixed at both ends of the rotating shaft 10, and a second sprocket 12 fixed on the track wheel shaft 4 and cooperating with the first sprocket 11. The first sprocket 11 drives the rotation of the track wheel shaft 4 to realize the travel of the track wheel 5 on the track 6. The driving of the track wheel 5 is realized by the motor 7 and the chain transmission mechanism, and the chain transmission mechanism can also be replaced by a belt transmission mechanism, and the driving sprocket, the driven sprocket 9, the first sprocket 11 and the second sprocket 12 are all replaced by pulleys, so that the rotation of the motor can also be transmitted to the track wheel shaft. The first sprocket 11 and the second sprocket 12 may also be retained, and the driving sprocket and the driven sprocket 9 may be replaced by a driving gear and a driven gear, which can also achieve the purpose of transmitting power.

[0029] The specimen rack 1 includes a confining pressure loading device, a bracket 101, a loading steel plate 102 and a first base 103. The bracket 101 is arranged on the top of the first base 103. The bracket 101 is used to place a rock specimen 104. The confining pressure loading device is fixed around the rock specimen 104 through the bracket 101. A loading steel plate 102 is arranged on the side of the rock specimen 104 to be drilled, and a drilling rig through hole is opened on the loading steel plate 102; sliding limit grooves 105 are symmetrically arranged at the upper and lower ends of the front of the bracket 101, and the loading steel plate 102 is clamped in the sliding limit groove 105, so that the loading steel plate 102 can apply passive confining pressure to the front of the rock specimen 104 under the pressure of the rear cylinder 106 on the rock specimen 104. When drilling is required, the drill bit of the drilling rig is inserted into the drilling rig through hole to achieve drilling of the rock specimen 104. The confining pressure loading device packages are respectively located at the pressure plates 107 at the rear, top and both sides of the rock specimen 104. The cross-sectional area of ​​the pressure plate 107 is not less than the cross-sectional area of ​​the corresponding rock specimen 104, which can ensure that the pressure plate 107 wraps the rock specimen 104 in all directions, thereby providing comprehensive confining pressure; the end of the pressure plate 107 away from the rock specimen 104 is fixedly connected to the piston rod of the cylinder 106, and the cylinder 106 is fixedly set on the bracket 101. In different embodiments, the cylinder 106 can be set on only one side of the two sides, and a loading steel plate 102 is set on the other side as in the front structure, so that the confining pressure effect on the rock specimen 104 can be achieved on both sides through the pressure of the cylinder 106 on one side, thereby reducing the cost.

[0030] In the description of the present invention, it should be noted that the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions 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 position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0031] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A rock specimen loading platform for blasting experiments, characterized in that: It includes a top plate and a base which are arranged in parallel up and down, the top plate and the base are connected by a lifting device, four legs are fixedly arranged at the bottom of the base, track wheels are connected to the bottom of the legs, two symmetrical tracks are laid under the base, and the two track wheels on the same side can roll on the corresponding tracks; a specimen rack is fixedly arranged on the top of the top plate, and the specimen rack is used to clamp rock specimens; a conveying device is arranged on one side of the base, and the conveying device is used to convey rock specimens.

2. The rock specimen loading platform for blasting experiment according to claim 1 is characterized in that: The lifting device includes a first support rod, a second support rod and a cylinder, the lower part of the first support rod is hingedly connected to the base, and the upper part of the first support rod is provided with a roller capable of rolling on the bottom of the top plate; the upper part of the second support rod is hingedly connected to the top plate, and the lower part of the second support rod is provided with a roller capable of rolling on the top of the base, the first support rod and the second support rod are arranged in an "X" shape and are hingedly connected, the cylinder is provided between the first support rod and the second support rod, the cylinder barrel of the cylinder is hingedly connected to the lower part of the first support rod, the end of the piston rod of the cylinder is hingedly connected to a connecting rod, and the end of the connecting rod away from the piston rod of the cylinder is hinged to the upper part of the second support rod.

3. The rock specimen loading platform for blasting experiment according to claim 1 is characterized in that: The conveying device includes a conveying frame, on which a plurality of rollers are evenly and parallelly arranged, the roller shafts at both ends of the rollers are arranged on the conveying frame through bearings, roller gears are fixedly installed at the ends of the roller shafts at one end of the plurality of rollers, the plurality of roller gears are connected through a closed roller chain transmission, and the end of the roller shaft farthest from the base is connected through a roller motor.

4. The rock specimen loading platform for blasting experiment according to claim 3 is characterized in that: A conveying base is arranged below the conveying frame, a plurality of hydraulic cylinders are fixedly arranged on the top of the conveying base, piston rods of the hydraulic cylinders are fixedly connected to the bottom of the conveying frame through a top support frame; a plurality of self-locking wheels are connected to the bottom of the conveying base.

5. The rock specimen loading platform for blasting experiment according to claim 2 is characterized in that: The base is provided with a driving device capable of driving the track wheel to move; the driving device includes a motor fixed on the base, and a transmission mechanism arranged between the motor output shaft and the track wheel shaft, the transmission mechanism includes a driving sprocket fixed on the motor output shaft, a rotating shaft rotatably installed on the base, a driven sprocket fixed at the middle of the rotating shaft and cooperating with the driving sprocket, a first sprocket fixed at both ends of the rotating shaft, and a second sprocket fixed on the track wheel shaft and cooperating with the first sprocket.

6. The rock specimen loading platform for blasting experiment according to claim 2 is characterized in that: The base is provided with a driving device capable of driving the track wheel to move; the driving device includes a motor fixed on the base, and a transmission mechanism arranged between the motor output shaft and the track wheel shaft, the transmission mechanism includes a driving pulley fixed on the motor output shaft, a rotating shaft rotatably installed on the base, a driven pulley fixed at the middle of the rotating shaft and cooperating with the driving pulley, a first pulley fixed at both ends of the rotating shaft, and a second pulley fixed on the track wheel shaft and cooperating with the first pulley.

7. The rock specimen loading platform for blasting experiment according to claim 2 is characterized in that: The base is provided with a driving device capable of driving the track wheel to move; the driving device includes a motor fixed on the base, and a transmission mechanism arranged between the motor output shaft and the track wheel shaft, the transmission mechanism includes a driving gear fixed on the motor output shaft, a rotating shaft rotatably installed on the base, a driven gear fixed to the middle of the rotating shaft and cooperating with the driving gear, a first sprocket fixed to both ends of the rotating shaft, and a second sprocket fixed to the track wheel shaft and cooperating with the first sprocket.

8. The rock specimen loading platform for blasting experiment according to claim 2 is characterized by: A groove is respectively provided on the top of the base and the bottom of the top plate, and the rollers on the first support rod and the second support rod are respectively in contact with and matched with the bottoms of the corresponding grooves.

9. The rock specimen loading platform for blasting experiment according to claim 1, characterized in that: The specimen rack includes a confining pressure loading device, a bracket, a loading steel plate and a first base. The bracket is arranged on the top of the first base. The bracket is used to place the rock specimen. The confining pressure loading device is fixed around the rock specimen through the bracket. The loading steel plate is arranged on the side of the rock specimen to be drilled, and a drilling rig through hole is opened on the loading steel plate. Sliding limit grooves are symmetrically arranged at the upper and lower ends of the front part of the bracket, and the loading steel plate is clamped in the sliding limit grooves.

10. The rock specimen loading platform for blasting experiment according to claim 9, characterized in that: The confining pressure loading device package is respectively located at the pressure plates at the rear, top and both sides of the rock specimen, and the cross-sectional area of ​​the pressure plate is not less than the corresponding cross-sectional area of ​​the rock specimen; one end of the pressure plate away from the rock specimen is fixedly connected to the piston rod of the cylinder, and the cylinder is fixedly arranged on the bracket.

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