Long tunnel fracture zone surrounding rock stability analysis device and use method thereof

Abstract

The invention provides a long tunnel fracture zone surrounding rock stability analysis device and a use method thereof, and belongs to the technical field of tunnel construction. The electric control box is mounted on the vehicle body; the rock core sampling mechanism is installed on the electric cabinet and used for driving the drill rod to rotate so as to drill a rock core, and the axial direction of the drill rod is defined as the left-right direction; the rock core sampling mechanism comprises a bearing table, and an inclined plane facing the rear side is arranged at the top of the bearing table; rock core drilling can be automatically completed, in the operation process, only one worker is needed for remote care, the sampling efficiency is greatly improved while the safety of the worker is guaranteed, the stability condition of surrounding rock of a fracture zone can be preliminarily judged after rock core sampling, the stability analysis time is shortened, and the working efficiency is improved. The method can better adapt to the problems that the number of broken zones of the long and large tunnel is large and the broken zones are complex.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction, and in particular to a device for analyzing the stability of surrounding rocks in a broken zone of a long tunnel and a method for using the device. Background Art

[0002] Broken zones refer to the broken areas in the rock formations formed by geological structures. The rocks in these areas are broken, fragmented or deformed due to stress, resulting in reduced integrity and stability of the rocks. Broken zones usually appear in faults, joint-dense areas, geological structure junctions and other areas with frequent geological structural activities. The stability analysis of the surrounding rock in the broken zone is an indispensable part of underground engineering, and it plays an important role in ensuring the safety, economy and environmental protection of the project.

[0003] There are two types of analysis methods for the stability of the surrounding rock of the broken zone: contact and non-contact. The contact method is to observe with the naked eye after drilling and sampling. This method can intuitively understand the general situation of the surrounding rock of the broken zone. The obtained rock broken zone information is relatively accurate and low-cost. The disadvantage of contact analysis is that the entire sampling and analysis process requires the measurement of multiple points, which is a large workload, requires the assistance of multiple people, and takes a long time. In addition, before drilling and sampling the surrounding rock of the broken zone, a bracket will be used for support. However, due to the complex situation of the broken zone, when drilling and sampling, gravel may fall due to vibration, posing a safety hazard. The non-contact method mainly includes sonic velocity measurement experiments. The non-contact analysis method can detect underground rock information without destroying the natural rock mass, and it is simple to operate and covers a wide range. However, it will be affected by the terrain and there will be a certain amount of noise.

[0004] At present, in order to improve the accuracy of the analysis results, a combination of contact and non-contact methods is generally used, that is, after the sonic velocity measurement experiment, drilling and sampling are carried out to improve the accuracy of the analysis results and reduce the impact on the construction process caused by large errors in the analysis results.

[0005] During the construction of some long tunnels (tunnels with a length of more than 1,000 meters), there are multiple broken zones. The current drilling sampling method, which is mainly mechanical and supplemented by manual sampling, is inefficient, resulting in a long stability analysis process and is difficult to meet construction needs. Summary of the invention

[0006] The invention provides a device for analyzing the stability of surrounding rocks in a broken zone of a long tunnel and a method for using the device, so as to solve the technical problem that the stability analysis process is relatively long in the prior art.

[0007] In order to solve the above problems, the device for analyzing the stability of the surrounding rock in the broken zone of a long tunnel provided by the present invention adopts the following technical solutions: Including the body; An electric control box, which is mounted on the vehicle body; A core sampling mechanism, which is installed on the electric control box, is used to drive the drill rod to rotate to drill the core, and the axial direction of the drill rod is defined as the left-right direction; the core sampling mechanism includes a load-bearing platform, the top of the load-bearing platform is provided with an inclined surface facing the rear side, a slide rail arranged along the left-right direction is fixedly installed on the inclined surface, a sliding base is slidably assembled on the slide rail, a driving mechanism for driving the sliding base to move is installed on the slide rail, a reduction motor is fixedly installed on the sliding base, a connecting shaft for connecting the drill rod is fixedly connected to the output shaft of the reduction motor, a limiting pin is fixedly connected to the side wall of the connecting shaft, and a positioning structure for positioning the connecting shaft is also installed on the sliding base; A drill rod transport mechanism is arranged at the rear side of the core sampling mechanism, and the drill rod transport mechanism includes two power boxes fixedly mounted on the vehicle body, a connecting rod is hinged on the top of the power box, a driving structure for driving the connecting rod to rotate is installed in the power box, and a grabbing structure for grabbing and driving the drill rod to rotate is fixedly installed on the top of the connecting rod; A sample storage mechanism, which is arranged at the rear side of the drill rod transport mechanism and is used to store the drill rod with the core sample; The drill rod storage mechanism is arranged above the sample storage mechanism and is used for storing and discharging the drill rods.

[0008] By adopting the above technical solution, the automatic installation and removal of the drill rod can be realized, which can be controlled remotely without manual on-site control of equipment or sampling, greatly reducing safety hazards. The top of the load-bearing platform is provided with an inclined surface facing the rear side, so that the slide rail is tilted, which can better cooperate with the drill rod transfer mechanism. At the same time, compared with the vertically set slide rail, the inclined slide rail can better support the sliding base and reduce the wear of the sliding base and the slide rail; The drill rod transfer mechanism can not only grab and transfer the drill rod, but also drive the drill rod to rotate, making it convenient for installation and disassembly of the drill rod.

[0009] As a further improvement, a hinge block is fixedly installed on the top of the power box, a hinge shaft is connected to the hinge block through a bearing, the hinge shaft is fixedly connected to the connecting rod, the driving structure includes a driven gear fixedly connected to the hinge shaft, a driving motor is fixedly installed inside the power box, a driving gear is fixedly connected to the output shaft of the driving motor, and the driving gear is meshed with the driven gear.

[0010] By adopting the above technical solution, the grabbing structure is driven to rotate around the connecting rod to realize the transportation of the drill rod.

[0011] As a further improvement, the number of teeth of the driving gear is smaller than the number of teeth of the driven gear.

[0012] By adopting the above technical solution, the force required to drive the connecting rod to rotate is reduced.

[0013] As a further improvement, the gripping structure includes a protective shell, an arc groove is provided on the side of the protective shell, active rollers are rotatably mounted on both sides of the arc groove, and an active motor for driving the active rollers to rotate is fixedly installed in the protective shell; The arc groove is also provided with a clamping cylinder fixedly mounted on the outer wall of the protective shell for clamping the drill rod on both sides. The clamping cylinder is fixedly connected with an arc plate matched with the drill rod, and a driven roller is rotatably mounted on the arc plate.

[0014] By adopting the above technical solution, the drill rod can be stably grasped. After the drill rod is grasped, the grasping structure limits the freedom of the drill rod in the left and right directions, so that the drill rod cannot move in the left and right directions; due to the setting of the driven roller of the active roller, the drill rod can still rotate along the axis, which facilitates the installation and disassembly of the drill rod.

[0015] As a further improvement, the sample storage mechanism includes two storage brackets fixedly mounted on the vehicle body, the two storage brackets are spaced apart in the left-right direction, a conveyor belt is mounted on the storage bracket, and a limiting groove for limiting the drill rod is provided on the conveyor belt.

[0016] The limit groove is used to limit and position the drill rod to prevent the drill rod from deviating on the conveyor belt. The conveyor belt is used to move the drill rod. When the drill rod is placed on the conveyor belt, the conveyor belt drives the drill rod to move one station to the rear side to avoid the grabbing structure and reserve space for the next drill rod.

[0017] As a further improvement, the drill rod storage mechanism includes two load-bearing brackets, on which a material-collecting structure that can slide in the front-rear direction is slidably mounted, a translation structure for driving the material-collecting structure to move is installed on the rear side of the material-collecting structure, and a storage rack for storing drill rods is provided above the material-collecting structure.

[0018] As a further improvement, the material taking structure includes a sliding frame, a partition plate for limiting the position of the drill rod is fixedly installed on the top of the side of the sliding frame, an avoidance hole is provided on the front side of the partition plate, a material drop hole is provided on the rear side of the partition plate, and a guide rail fixedly connected to the sliding frame is provided below the partition plate, the guide rail is inclined, and the front end of the guide rail is lower than the rear end; an L-shaped partition frame is fixedly installed on the rear side of the sliding frame; The material storage rack is a concave-shaped enclosure plate, and a through hole matching the partition rack is opened on the rear side of the material storage rack; The material taking structure has a locking position and a dropping position on its sliding stroke. When the material taking structure is in the locking position, its partition plate is located below the material storage rack to limit the drill rod; when the material taking structure is in the dropping position, its sliding rack extends a load-bearing bracket, and the dropping hole is located below the material storage rack. At the same time, the partition rack moves to above the bottom drill rod to prevent the upper drill rod from falling, and the bottom drill rod falls onto the guide rail and rolls to the front end of the guide rail.

[0019] By adopting the above technical solution, the drill rods are discharged one by one. At the same time, the material taking structure can slide on the load-bearing bracket. When loading materials, the material taking structure extends out of the load-bearing bracket to allow the grabbing structure to take materials. Afterwards, when the core sampling is completed, the grabbing structure removes the drill rod with the core, and the material taking structure retreats to avoid the drill rod with the core, so that the drill rod with the core is lowered to the sample storage mechanism.

[0020] As a further improvement, the positioning structure includes a positioning cylinder fixedly mounted on a sliding base, an output end of the positioning cylinder is fixedly connected to a positioning plate, and a pressure sensor is embedded on the positioning plate.

[0021] The connection shaft is positioned by setting a positioning structure, which facilitates the assembly of the drill rod.

[0022] A method for using a device for analyzing the stability of surrounding rocks in a broken zone of a long tunnel, using the above-mentioned device for analyzing the stability of surrounding rocks in a broken zone of a long tunnel, comprising the following steps: S1, according to the drilling point of the surrounding rock of the broken zone, the moving trajectory of the stability analysis device of the surrounding rock of the broken zone of the long tunnel is preset; S2, loading, placing the drill rods into the storage rack one by one; S3, drill rod installation. After startup, the surrounding rock stability analysis device of the broken zone of the long tunnel moves to the preset position, the driving structure drives the grabbing structure to rotate to the bottom of the load-bearing bracket, the translation structure drives the material-retrieving structure to move forward, the sliding frame extends out of the load-bearing bracket, and the drill rod at the bottom of the storage rack falls to the guide rail and rolls to the front end of the guide rail; The driving and rotating structure drives the grabbing structure to rise, the drill rod is clamped into the arc groove of the grabbing structure, the clamping cylinder drives the arc plate to clamp the drill rod, and then the driving and rotating structure continues to drive the grabbing structure to rotate until the connecting shaft is coaxial with the drill rod; The positioning cylinder drives the positioning piece to move to the set position. At this time, the reduction motor drives the connecting shaft to rotate until the limit pin fits the positioning piece, triggering the pressure sensor and stopping the reduction motor to avoid damaging the positioning cylinder. At the same time, the connecting shaft completes the positioning. The driving mechanism drives the sliding base to move, so that the connecting shaft contacts the drill rod and applies pressure to the drill rod. At the same time, the active roller drives the drill rod to rotate. When the matching groove of the drill rod rotates to the limit pin of the connecting shaft, the limit pin is stuck in the matching groove of the drill rod, so that the drill rod cannot continue to rotate, and the drill rod positioning is completed; After the positioning is completed, the positioning structure is reset, and the driving mechanism drives the sliding base to move toward the drill rod again until the limit pin moves to the end of the matching groove, and the active roller drives the drill rod to rotate again to complete the installation of the drill rod; S4, drilling cores, the reduction motor drives the drill rod to rotate, and the driving mechanism pushes the drill rod to move to drill cores; S5, dismantle the drill rod, start the positioning structure again to limit the limit pin, the grabbing structure grabs the drill rod, the active roller drives the drill rod to rotate in the opposite direction, the driving mechanism drives the connecting shaft to separate from the drill rod, and the driving structure drives the grabbing structure to rotate, so that the drill rod with the core is placed in the sample storage mechanism; S6, the surrounding rock stability analysis device of the broken zone of the long tunnel moves to each sampling point in turn, and repeats steps S3-S5 until all sampling work is completed; S7, all the drilled cores are taken out in turn, and the stability of the surrounding rock in the broken zone is determined by preliminary analysis through visual observation; then all the cores are sent for inspection, and finally the results of visual observation, laboratory analysis and sonic velocity measurement experiments are compared to determine the stability of the surrounding rock in the broken zone.

[0023] The beneficial effects of the above technical solution of the present invention are as follows: 1. The present invention realizes automatic installation and disassembly of the drill rod by arranging a sample storage mechanism, a drill rod storage mechanism and a drill rod transfer mechanism. When drilling cores, there is no need for manual installation and disassembly operations of the drill rod on site, thereby reducing the safety hazards of sampling in the broken zone.

[0024] 2. The slide rail and the slide base of the present invention are tilted, which, on the one hand, enables the drill rod transfer mechanism to cooperate with the core sampling mechanism, and on the other hand, can prevent the slide rail from being subjected to excessive force and reduce the wear of the slide rail by the slide base and other equipment.

[0025] 3. By setting up a drill rod storage mechanism, the drill rods can be discharged one by one. The material taking structure can slide on the load-bearing bracket. When loading, the material taking structure extends out of the load-bearing bracket to allow the grabbing structure to take the material. Afterwards, when the core sampling is completed, the grabbing structure removes the drill rod with the core, and the material taking structure retreats to avoid the drill rod with the core, so that the drill rod with the core is lowered to the sample storage mechanism.

[0026] 4. The connecting shaft is positioned by setting a positioning structure to facilitate the installation and disassembly of the drill rod.

[0027] 5. The present invention can automatically complete core drilling. During the operation, only one staff member is needed to watch from a distance. While ensuring the safety of the operators, the sampling efficiency is greatly improved. After core sampling, the stability of the surrounding rock of the broken zone can be preliminarily judged, which shortens the time for stability analysis and can better adapt to the problems of large number of broken zones and complex broken zone conditions in long tunnels. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein: Figure 1 It is a schematic diagram of the main structure of the device for analyzing the stability of surrounding rock in the broken zone of a long tunnel according to the present invention; Figure 2 It is a left-side structural schematic diagram of the device for analyzing the stability of surrounding rock in the broken zone of a long tunnel according to the present invention; Figure 3 It is a structural schematic diagram of the drill rod storage mechanism of the device for analyzing the stability of surrounding rock in the broken zone of a long tunnel according to the present invention; Figure 4 It is a schematic structural diagram of the grabbing structure of the device for analyzing the stability of surrounding rock in the broken zone of a long tunnel according to the present invention; Figure 5 It is a structural schematic diagram of the driving and rotating structure of the device for analyzing the stability of surrounding rock in the broken zone of a long tunnel according to the present invention; Figure 6 It is a schematic structural diagram of the connecting shaft of the device for analyzing the stability of surrounding rock in the broken zone of a long tunnel according to the present invention.

[0029] Figure 7 It is a schematic structural diagram of a storage rack of a device for analyzing the stability of surrounding rock in a broken zone of a long tunnel according to the present invention.

[0030] Description of reference numerals: 1. Car body; 11. Chassis; 12. Track wheel; 2. Sample storage mechanism; 21. Storage bracket; 22. Conveyor belt; 221. Limiting groove; 3. Drill rod storage mechanism; 31. Load-bearing bracket; 32. Translation structure; 33. Material taking structure; 331. Sliding frame; 332. Dropping hole; 333. Partition frame; 334. Partition plate; 335. Avoidance hole; 336. Guide rail; 34. Material storage rack; 4. Drill rod transfer mechanism; 41. Power box; 42. Articulated block; 421 , articulated shaft; 43, connecting rod; 44, grabbing structure; 441, protective shell; 442, arc groove; 443, driving roller; 444, arc plate; 445, driven roller; 446, clamping cylinder; 45, driving structure; 451, driven gear; 452, driving gear; 453, driving motor; 5, core sampling mechanism; 51, reduction motor; 52, connecting shaft; 53, positioning structure; 54, sliding base; 55, slide rail; 56, load-bearing platform; 6, electric control box. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0032] At present, in order to reduce the problem that the analysis results of the surrounding rock stability in the broken zone are different from the actual results, we adopt a combination of contact and non-contact methods to improve the accuracy of the analysis results.

[0033] In the existing technology, the equipment used in the core drilling and analysis process is large in size and generally requires two to four people to operate. The manual debugging, installation, drilling, sampling and other steps take a lot of time and are inefficient, which leads to a long stability analysis process. During the construction of a long tunnel, there may be many broken zones, and the conditions are different, making it difficult for the existing stability sampling and analysis equipment to meet the use requirements.

[0034] In response to the above problem, the present invention designs an analysis device that can continuously and automatically take samples. The basic principle is: the drill rod transfer mechanism grabs a drill rod from the drill rod storage mechanism and installs it on the core sampling mechanism. After the core sampling is completed, the drill rod transfer mechanism removes the drill rod with the core and transfers it to the sample storage mechanism. The above operation is repeated until all sampling work is completed. All samples are taken out of the drill rod and placed in the sample box in turn for observation and analysis.

[0035] After introducing the basic principle of the present invention, various non-limiting embodiments of the present invention are described in detail below. The number of any element in the drawings is for illustration and not for limitation, and any naming is only for distinction and does not have any limiting meaning.

[0036] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0037] Embodiment 1 of the device for analyzing the stability of surrounding rock in the broken zone of a long tunnel provided by the present invention: like Figure 1-Figure 7 As shown, it includes a vehicle body 1, an electric control box 6, a core sampling mechanism 5 for driving the drill rod to rotate, a drill rod transport mechanism 4 for transporting the drill rod, a sample storage mechanism 2 for storing the drill rod with the core, and a drill rod storage mechanism 3 for storing the drill rod; like Figure 1 As shown, the vehicle body 1 adopts track wheels 12 to adapt to the more complex road conditions in the tunnel; like Figure 1As shown, the electric control box 6 is installed on the vehicle body 1, and the electric control box 6 is used to install electrical components, such as a water supply pump, hydraulic components, etc.; like Figure 1 and Figure 2 As shown, the core sampling mechanism 5 is installed on the electric control box 6. The core sampling mechanism 5 is used to drive the drill rod to rotate to drill the core. The axial direction of the drill rod is defined as the left and right direction; the core sampling mechanism 5 includes a load-bearing platform 56. The top of the load-bearing platform 56 is provided with an inclined surface facing the rear side, and the inclination angle is 30° to 45°. The setting of the inclined surface makes the slide rail 55, the sliding base 54 and other components all in an inclined state. Since the drill rod transportation mechanism 4 in this embodiment is transported by rotation, the inclined sliding base 54 can better cooperate with the drill rod transportation mechanism 4.

[0038] A slide rail 55 arranged in the left and right directions is fixedly installed on the inclined surface. In order to ensure the stability of the slide rail 55, a support rod for supporting the slide rail 55 is also provided on the side of the electric control box 6. A sliding base 54 is slidably mounted on the slide rail 55. A driving mechanism for driving the sliding base 54 to move is installed on the slide rail 55. In this embodiment, the driving mechanism is a synchronous belt (not shown in the figure). The synchronous belt includes two transmission wheels and a belt wound around the transmission wheels. The servo motor is connected to one of the transmission wheels, and the belt is fixedly connected to the sliding base 54. The synchronous belt facilitates better control of the pressure applied by the connecting shaft 52 to the drill pipe.

[0039] A reduction motor 51 is fixedly mounted on the sliding base 54, and a connecting shaft 52 for connecting a drill rod is fixedly connected to the output shaft of the reduction motor 51. The structure of the connecting shaft 52 is as follows: Figure 5 As shown, a limit pin is fixedly connected to the side wall of the connecting shaft 52, and a positioning structure 53 for positioning the connecting shaft 52 is also installed on the sliding base 54; In this embodiment, the positioning structure 53 includes a positioning cylinder fixedly mounted on a sliding base 54, and a positioning piece is fixedly connected to the output end of the positioning cylinder, and a pressure sensor is embedded on the positioning piece. One of the difficulties in automatic installation and removal of the drill rod is positioning. By setting the positioning structure 53, the connecting shaft 52 is positioned and limited, which facilitates the subsequent installation of the drill rod.

[0040] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the drill rod transport mechanism 4 is arranged at the rear side of the core sampling mechanism 5, and the drill rod transport mechanism 4 includes two power boxes 41 fixedly mounted on the vehicle body 1, and a hinge block 42 is fixedly mounted on the top of the power box 41, and a hinge shaft 421 is connected to the hinge block 42 through a bearing, and the hinge shaft 421 is fixedly connected to a connecting rod 43; like Figure 5As shown, a driving structure 45 for driving the connecting rod 43 to rotate is installed in the power box 41. In this embodiment, the driving structure 45 includes a driven gear 451 fixedly connected to the hinge shaft 421. A driving motor 453 is fixedly installed inside the power box 41. A driving gear 452 is fixedly connected to the output shaft of the driving motor. The driving gear 452 is meshed with the driven gear 451. The number of teeth of the driving gear 452 is less than the number of teeth of the driven gear 451, so as to reduce the force required for the driving connecting rod 43 to rotate. In other embodiments, the driving mechanism can use a sprocket, or a telescopic rod to drive the connecting rod 43 to rotate.

[0041] like Figure 4 As shown, a grabbing structure 44 for grabbing and driving the drill pipe to rotate is fixedly installed on the top of the connecting rod 43; the grabbing structure 44 includes a protective shell 441, an arc groove 442 is provided on the side of the protective shell 441, and driving rollers 443 are rotatably mounted on both sides of the arc groove 442, and the driving roller 443 and the driven roller 445 are sleeved with rubber pads for increasing friction, and an active motor (not shown in the figure) for driving the active roller 443 to rotate is fixedly installed in the protective shell 441, and the active motor is meshed with the active roller 443 through gears; A clamping cylinder 446 fixedly mounted on the outer wall of the protective shell 441 for clamping the drill rod is also provided on both sides of the arc groove 442. The clamping cylinder 446 is fixedly connected to an arc plate 444 that cooperates with the drill rod, and a driven roller 445 is rotatably mounted on the arc plate 444.

[0042] By adopting the above technical solution, the drill rod can be stably grasped. After the drill rod is grasped, the grasping structure 44 limits the freedom of the drill rod in the left and right directions, so that the drill rod cannot move in the left and right directions; due to the setting of the driven roller 445 of the active roller 443, the drill rod can still rotate along the axis, which facilitates the installation and disassembly of the drill rod.

[0043] like Figure 2 As shown, the sample storage mechanism 2 is arranged at the rear side of the drill rod transport mechanism 4, and the sample storage mechanism 2 is used to store the drill rod with the core sample. In this embodiment, the drill bit at the front end of the drill rod and the connector at the rear end are pre-installed; The sample storage mechanism 2 includes two storage brackets 21 fixedly mounted on the vehicle body 1, the two storage brackets 21 support both ends of the drill rod, the two storage brackets 21 are spaced apart in the left-right direction, a conveyor belt 22 is mounted on the storage bracket 21, and a limiting groove 221 is provided on the conveyor belt 22 for limiting the position of the drill rod.

[0044] The limiting groove 221 is used to limit and position the drill rod to prevent the drill rod from deviating on the conveyor belt 22. The conveyor belt 22 is used to move the drill rod. When the drill rod is placed on the conveyor belt 22, the conveyor belt 22 drives the drill rod to move one station to the rear side to avoid the grabbing structure 44 and reserve space for the next drill rod.

[0045] like Figure 3 As shown, the drill rod storage mechanism 3 is arranged above the sample storage mechanism 2 and is used for storing and discharging drill rods.

[0046] The drill rod storage mechanism 3 includes two load-bearing brackets 31, on which a material picking structure 33 that can slide in the front-rear direction is slidably mounted, and a translation structure 32 for driving the material picking structure 33 to move is installed on the rear side of the material picking structure 33. In this embodiment, the translation structure 32 is a telescopic cylinder, and a storage rack 34 for storing drill rods is provided above the material picking structure 33.

[0047] The material taking structure 33 includes a sliding frame 331, a partition plate 334 for limiting the position of the drill rod is fixedly installed on the top of the side of the sliding frame 331, a avoidance hole 335 is provided on the front side of the partition plate 334, a material drop hole 332 is provided on the rear side of the partition plate 334, and a guide rail 336 fixedly connected to the sliding frame 331 is provided below the partition plate 334. The guide rail 336 is inclined, and the front end of the guide rail 336 is lower than the rear end; an L-shaped partition frame 333 is fixedly installed on the rear side of the sliding frame 331; like Figure 7 As shown, the material storage rack 34 is a concave-shaped enclosure, and a through hole cooperating with the partition rack 333 is opened at the rear side of the material storage rack 34; The material picking structure 33 has a locking position and a dropping position on its sliding stroke. When the material picking structure 33 is in the locking position, its partition plate 334 is located below the storage rack 34 to limit the drill rod; when the material picking structure 33 is in the dropping position, its sliding rack 331 extends out of the load-bearing bracket 31, and the dropping hole 332 is located below the storage rack 34. At the same time, the partition rack 333 moves to above the bottom drill rod to prevent the upper drill rod from falling, and the bottom drill rod falls to the guide rail 336 and rolls to the front end of the guide rail 336.

[0048] By adopting the above technical solution, the drill rods are discharged one by one. At the same time, the material taking structure 33 can slide on the load-bearing bracket 31. When loading, the material taking structure 33 extends out of the load-bearing bracket 31 to allow the grabbing structure 44 to take the material. Afterwards, when the core sampling is completed, the grabbing structure 44 removes the drill rod with the core, and the material taking structure 33 retreats to avoid the drill rod with the core, so that the drill rod with the core is lowered to the sample storage mechanism 2.

[0049] This embodiment also provides a method for using the above-mentioned device for analyzing the stability of surrounding rock in a broken zone of a long tunnel, comprising the following steps: S1, according to the drilling point of the surrounding rock of the broken zone, the moving trajectory of the stability analysis device of the surrounding rock of the broken zone of the long tunnel is preset; S2, loading, placing the drill rods into the storage racks 34 one by one. The drill rods in this embodiment refer to the drill rods with drill bits and connectors installed. The two storage racks 34 can position the drill rods; S3, after the drill rod is installed and started, the surrounding rock stability analysis device of the broken zone of the long tunnel moves to the preset position, the driving structure 45 drives the grabbing structure 44 to rotate to the bottom of the load-bearing bracket 31, and the translation structure 32 drives the material-collecting structure 33 to move forward. During the forward movement of the material-collecting structure 33, the partition frame 333 is inserted between the bottom drill rod and the previous drill rod. At the same time, the material-dropping hole 332 moves to the material storage rack 34. After the bottom drill rod lacks a limit, it falls to the guide rail 336 and rolls to the front end of the guide rail 336; when moving forward, the sliding frame 331 extends out of the load-bearing bracket 31 (after the sliding frame 331 extends out of the load-bearing bracket 31, when the grabbing structure 44 moves up, the drill rod just fits into the arc groove 442 of the grabbing structure 44); The driving and rotating structure 45 drives the grabbing structure 44 to rise, and the drill rod is clamped into the arc groove 442 of the grabbing structure 44. The clamping cylinder 446 drives the arc plate 444 to clamp the drill rod. Then, the driving and rotating structure 45 continues to drive the grabbing structure 44 to rotate until the connecting shaft 52 is coaxial with the drill rod. The positioning cylinder drives the positioning piece to move to the set position. At this time, the reduction motor 51 drives the connecting shaft 52 to rotate until the limit pin fits the positioning piece, triggering the pressure sensor, and the reduction motor 51 stops to avoid damaging the positioning cylinder. At the same time, the connecting shaft 52 completes the positioning; The driving mechanism drives the sliding base 54 to move, so that the connecting shaft 52 contacts the drill rod and applies pressure to the drill rod. The applied pressure should not be too large to avoid affecting the rotation of the drill rod. The applied pressure is 2-10N, and the pressure can be achieved by adjusting the servo motor of the synchronous belt. The active roller 443 drives the drill rod to rotate one circle (the drill rod rotates one circle, which must make the limit pin and the matching groove contact and match). When the matching groove of the drill rod rotates to the limit pin of the connecting shaft 52, the limit pin is stuck in the matching groove of the drill rod, so that the drill rod cannot continue to rotate, and the drill rod positioning is completed; After the positioning is completed, the positioning structure 53 is reset, and the driving mechanism drives the sliding base 54 to move toward the drill rod again, until the limit pin moves to the end of the matching groove, and the active roller 443 drives the drill rod to rotate again, completing the installation of the drill rod; S4, drilling the core, the reduction motor 51 drives the drill rod to rotate, and the driving mechanism pushes the drill rod to move, and the core is drilled; S5, dismantle the drill rod, start the positioning structure 53 again to limit the limit pin, the grabbing structure 44 grabs the drill rod, the active roller 443 drives the drill rod to rotate in the opposite direction, the driving mechanism drives the connecting shaft 52 to separate from the drill rod, and the driving structure 45 drives the grabbing structure 44 to rotate, so that the drill rod with the core is placed in the sample storage mechanism 2; S6, the surrounding rock stability analysis device of the broken zone of the long tunnel moves to each sampling point in turn, and repeats steps S3-S5 until all sampling work is completed; S7, all the drilled cores are taken out in turn, and the stability of the surrounding rock in the broken zone is determined by preliminary analysis through visual observation; then all the cores are sent for inspection, and finally the results of visual observation, laboratory analysis and sonic velocity measurement experiments are compared to determine the stability of the surrounding rock in the broken zone.

[0050] Embodiment 2 of the device for analyzing the stability of surrounding rock in the broken zone of a long tunnel provided by the present invention: The main difference between it and Example 1 is: In Example 1, the load-bearing platform is fixedly installed on the electric control box, and a support rod for supporting the slide rail is also provided on the side of the electric control box.

[0051] In this embodiment, the load-bearing platform is hinged on the electric control box, a hydraulic cylinder is installed on the side of the electric control box, the top of the hydraulic cylinder is hinged to the slide rail, and the bottom of the hydraulic cylinder is hinged to the vehicle body. In this embodiment, the drilling angle can be adjusted according to actual conditions.

[0052] Embodiment 3 of the device for analyzing the stability of surrounding rock in the broken zone of a long tunnel provided by the present invention: The main difference between it and Example 1 is: In this embodiment, the sample storage mechanism can be detachably connected or slidably assembled on the vehicle body, so that the spacing between the storage brackets can be adjusted, and then the required length of the drill rod can be replaced to improve practicality.

[0053] Although this specification has shown and described a plurality of embodiments of the present invention, it is obvious to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art will think of many changes, modifications and alternatives without departing from the thought and spirit of the present invention. It should be understood that in the process of practicing the present invention, various alternatives to the embodiments of the present invention described herein may be adopted. The attached claims are intended to define the scope of protection of the present invention, and therefore cover the modular composition, equivalent or alternatives within the scope of protection of these claims.

Claims

1. A device for analyzing the stability of surrounding rock in a broken zone of a long tunnel, characterized in that: include: Car body (1); An electric control box (6) mounted on the vehicle body (1); A core sampling mechanism (5) is mounted on an electric control box (6). The core sampling mechanism (5) is used to drive a drill rod to rotate so as to drill a core. The axial direction of the drill rod is defined as a left-right direction. The core sampling mechanism (5) comprises a load-bearing platform (56). The top of the load-bearing platform (56) is provided with an inclined surface facing the rear side. A slide rail (55) arranged along the left-right direction is fixedly mounted on the inclined surface. A slide base (54) is slidably mounted on the slide rail (55). A driving mechanism for driving the slide base (54) to move is mounted on the slide rail (55). A reduction motor (51) is fixedly mounted on the slide base (54). A connecting shaft (52) for connecting a drill rod is fixedly connected to the output shaft of the reduction motor (51). A limit pin is fixedly connected to the side wall of the connecting shaft (52). A positioning structure (53) for positioning the connecting shaft (52) is also mounted on the slide base (54). A drill rod transport mechanism (4) is arranged at the rear side of the core sampling mechanism (5), the drill rod transport mechanism (4) comprising two power boxes (41) fixedly mounted on the vehicle body (1), a connecting rod (43) being hingedly connected to the top of the power box (41), a driving structure (45) for driving the connecting rod (43) to rotate being mounted in the power box (41), and a grabbing structure (44) for grabbing and driving the drill rod to rotate being fixedly mounted on the top of the connecting rod (43); A sample storage mechanism (2) is arranged at the rear side of the drill rod transport mechanism (4), and the sample storage mechanism (2) is used to store the drill rod with the core sample; The drill rod storage mechanism (3) is arranged above the sample storage mechanism (2) and is used for storing and discharging drill rods.

2. The device for analyzing the stability of surrounding rock in the broken zone of a long tunnel according to claim 1 is characterized in that: A hinge block (42) is fixedly mounted on the top of the power box (41); a hinge shaft (421) is connected to the hinge block (42) via a bearing; the hinge shaft (421) is fixedly connected to the connecting rod (43); the driving structure (45) comprises a driven gear (451) fixedly connected to the hinge shaft (421); a driving motor (453) is fixedly mounted inside the power box (41); a driving gear (452) is fixedly connected to the output shaft of the driving motor; the driving gear (452) and the driven gear (451) are meshed with each other.

3. The device for analyzing the stability of surrounding rock in the broken zone of a long tunnel according to claim 2 is characterized in that: The number of teeth of the driving gear (452) is smaller than the number of teeth of the driven gear (451).

4. The device for analyzing the stability of surrounding rock in the broken zone of a long tunnel according to claim 1 is characterized in that: The grabbing structure (44) comprises a protective shell (441), an arc-shaped groove (442) is provided on the side of the protective shell (441), driving rollers (443) are rotatably mounted on both sides of the arc-shaped groove (442), and a driving motor for driving the driving rollers (443) to rotate is fixedly mounted in the protective shell (441); The arc groove (442) is also provided with a clamping cylinder (446) fixedly mounted on the outer wall of the protective shell (441) for clamping the drill rod on both sides; the clamping cylinder (446) is fixedly connected to an arc plate (444) matched with the drill rod; and a driven roller (445) is rotatably mounted on the arc plate (444).

5. The device for analyzing the stability of surrounding rock in the broken zone of a long tunnel according to claim 1 is characterized in that: The sample storage mechanism (2) comprises two storage brackets (21) fixedly mounted on the vehicle body (1), the two storage brackets (21) being arranged at intervals in the left-right direction, a conveyor belt (22) being mounted on the storage brackets (21), and a limiting groove (221) for limiting the position of the drill rod being provided on the conveyor belt (22).

6. The device for analyzing the stability of surrounding rock in the broken zone of a long tunnel according to claim 1 is characterized in that: The drill rod storage mechanism (3) comprises two load-bearing brackets (31), on which a material taking structure (33) that can slide in the front-rear direction is slidably mounted, a translation structure (32) for driving the material taking structure (33) to move is mounted on the rear side of the material taking structure (33), and a material storage rack (34) for storing drill rods is arranged above the material taking structure (33).

7. The device for analyzing the stability of surrounding rock in the broken zone of a long tunnel according to claim 6 is characterized in that: The material taking structure (33) comprises a sliding frame (331), a partition plate (334) for limiting the position of the drill rod is fixedly installed on the top of the side of the sliding frame (331), a avoidance hole (335) is provided on the front side of the partition plate (334), a material drop hole (332) is provided on the rear side of the partition plate (334), and a guide rail (336) fixedly connected to the sliding frame (331) is provided below the partition plate (334), the guide rail (336) is inclined, and the front end of the guide rail (336) is lower than the rear end; an L-shaped partition frame (333) is fixedly installed on the rear side of the sliding frame (331); The material storage rack (34) is a concave-shaped enclosure plate, and a through hole cooperating with the partition rack (333) is provided on the rear side of the material storage rack (34); The material taking structure (33) has a locking position and a material dropping position in its sliding stroke. When the material taking structure (33) is in the locking position, its partition plate (334) is located below the material storage rack (34) to limit the position of the drill rod. When the material taking structure (33) is in the material dropping position, its sliding rack (331) extends out of the load-bearing bracket (31), and the material dropping hole (332) is located below the material storage rack (34). At the same time, the partition rack (333) moves to the top of the bottom drill rod to prevent the top drill rod from falling, and the bottom drill rod falls to the guide rail (336) and rolls to the front end of the guide rail (336).

8. The device for analyzing the stability of surrounding rock in the broken zone of a long tunnel according to claim 1 is characterized by: The positioning structure (53) comprises a positioning cylinder fixedly mounted on a sliding base (54); an output end of the positioning cylinder is fixedly connected to a positioning sheet, and a pressure sensor is embedded on the positioning sheet.

9. A method for using a device for analyzing the stability of surrounding rock in a broken zone of a long tunnel, using the device for analyzing the stability of surrounding rock in a broken zone of a long tunnel as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S1, according to the drilling point of the surrounding rock of the broken zone, the moving trajectory of the stability analysis device of the surrounding rock of the broken zone of the long tunnel is preset; S2, loading, placing the drill rods into the storage rack (34) in sequence; S3, drill rod installation, after startup, the long tunnel broken zone surrounding rock stability analysis device moves to a preset position, the driving structure (45) drives the grabbing structure (44) to rotate to the bottom of the load-bearing bracket (31), the translation structure (32) drives the material taking structure (33) to move forward, the sliding frame (331) extends out of the load-bearing bracket (31), and the drill rod at the bottom of the storage rack (34) falls onto the guide rail (336) and rolls to the front end of the guide rail (336); The driving and rotating structure (45) drives the grabbing structure (44) to rise, the drill rod is clamped into the arc groove (442) of the grabbing structure (44), the clamping cylinder (446) drives the arc plate (444) to clamp the drill rod, and then the driving and rotating structure (45) continues to drive the grabbing structure (44) to rotate until the connecting shaft (52) is coaxial with the drill rod; The positioning cylinder drives the positioning piece to move to a set position, and the reduction motor (51) drives the connecting shaft (52) to rotate until the limit pin fits the positioning piece, triggering the pressure sensor and stopping the reduction motor (51) to avoid damaging the positioning cylinder. At the same time, the connecting shaft (52) completes positioning; The driving mechanism drives the sliding base (54) to move, so that the connecting shaft (52) contacts the drill rod and applies pressure to the drill rod, and at the same time the active roller (443) drives the drill rod to rotate. When the matching groove of the drill rod rotates to the limit pin of the connecting shaft (52), the limit pin is stuck in the matching groove of the drill rod, so that the drill rod cannot continue to rotate, and the positioning of the drill rod is completed; After the positioning is completed, the positioning structure (53) is reset, and at the same time, the driving mechanism drives the sliding base (54) to move toward the drill rod again until the limit pin moves to the end of the matching groove, and the active roller (443) drives the drill rod to rotate again, thereby completing the installation of the drill rod; S4, drilling the core, the reduction motor (51) drives the drill rod to rotate, and the driving mechanism propels the drill rod to move, thereby drilling the core; S5, dismantling the drill rod, starting the positioning structure (53) again to limit the limit pin, the grabbing structure (44) grabs the drill rod, the active roller (443) drives the drill rod to rotate in the opposite direction, the driving mechanism drives the connecting shaft (52) to separate from the drill rod, and the driving structure (45) drives the grabbing structure (44) to rotate, so that the drill rod with the core is placed in the sample storage mechanism (2); S6, the surrounding rock stability analysis device of the broken zone of the long tunnel moves to each sampling point in turn, and repeats steps S3-S5 until all sampling work is completed; S7, all the drilled cores are taken out in turn, and the stability of the surrounding rock in the broken zone is determined by preliminary analysis through visual observation; then all the cores are sent for inspection, and finally the results of visual observation, laboratory analysis and sonic velocity measurement experiments are compared to determine the stability of the surrounding rock in the broken zone.

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