An on-line scanning and automatic analysis system and method for gravel

Abstract

The application provides a broken stone online scanning and block degree automatic analysis system, which comprises a flying stone scanning module, a heap stone transportation module, a broken stone scanning module and a broken stone classification module; the flying stone scanning module performs real-time scanning on flying stones generated in operation to obtain block degree characteristics of the flying stones; the heap stone transportation module collects and transfers the flying stones and heap stones to a belt conveyor; the broken stone scanning module performs block degree scanning on the broken stones on the belt conveyor; and the broken stone classification module classifies the broken stones with different block degree ranges and realizes classified transportation. The application obtains the block degree characteristics of the flying stones or the heap stones in underground engineering by means of three-dimensional laser scanning technology, establishes a complete set of rock block degree online scanning and automatic analysis mode from flying stone generation, heap stone transfer to belt transportation, and makes the rock block degree measurement faster and more efficient, can intuitively analyze the engineering excavation efficiency, and further forms an important guidance for the improvement of the blasting design scheme or the tunneling equipment.

Description

Technical Field

[0001] This invention relates to the field of online detection of rock block size in underground engineering, and particularly to an online scanning and automatic block size analysis system and method for crushed stone. Background Technology

[0002] Rock block size control is a crucial operation in mining and mineral engineering for controlling and minimizing the costs of loading, transportation, crushing, sorting, and processing. To meet aggregate gradation and block size requirements during engineering construction or ore beneficiation processes, while simultaneously controlling production costs and shortening overall project timelines, numerous methods exist for evaluating the block size of blasted rock masses or crushed rock generated during excavation. Ideally, the mined rock block size should meet design requirements and can be used directly. However, crushed rock that does not meet gradation or block size requirements requires secondary crushing. This process increases labor and machinery costs, negatively impacting production efficiency, and large rock blocks pose a greater risk of injury during blasting. Therefore, improving the intelligence and speed of rock block size evaluation during underground mining is of significant guiding importance for mine production.

[0003] There are many existing analytical methods for evaluating the block size characteristics of rock blocks. Traditional methods rely on manual measurement or sieving. Both methods are labor-intensive, time-consuming, subjective, and involve a large overall workload. With the continuous development of 3D laser scanning technology, the intelligence level of its data acquisition process has improved. Due to its lightweight nature, the space cost of the instrument has gradually decreased. Using the obtained 3D point cloud data for rock block size analysis is currently a widely accepted technique. Real-time online analysis of rock block size through a 3D laser scanner and its automated analysis system provides important reference for blasting collapse or drilling design schemes, helping to control the block size and saving labor and machinery costs associated with multiple crushing operations due to excessively large blocks.

[0004] Chinese invention patent application CN114295046A discloses a method and system for comprehensive evaluation of blast pile morphology, electronic equipment, and storage medium. This method involves deploying multiple three-dimensional laser scanning stations within the blasting area after exploration and measurement to monitor the entire blasting process. A three-dimensional coordinate system is established based on the monitoring range of the blasting area and the selected monitoring stations. Then, the entire process of blast pile formation is monitored using these multiple three-dimensional laser scanning stations, acquiring point cloud data and images of the blast pile generation process. After analyzing and processing the point cloud data and images, multiple morphological features of the blast pile can be obtained. Based on these multiple morphological features, a comprehensive evaluation index of blast pile morphology based on information fusion is calculated. This method not only evaluates and analyzes the blast pile morphology from multiple dimensions but also achieves information fusion of multiple morphological features, enabling a more comprehensive and accurate evaluation of the blast pile morphology. This provides accurate reference for subsequent loading operations and optimization of blasting parameters.

[0005] Chinese invention patent application CN114818019A discloses a method for identifying rock block size. The method includes the following steps: S1, establishing a three-dimensional geometric analysis mathematical model of the rock block composed of point cloud data; S2, extracting the three-dimensional geometric dimensions of the rock block in stages, and constructing a three-dimensional image and rock block gradation database; S3, outputting the rock block size distribution curve. This invention obtains point cloud data of the blast pile and rock block surface through three-dimensional laser scanning, constructs a three-dimensional image and rock block gradation database, and completes the identification of rock block size through data comparison, improving the efficiency and accuracy of rock block size identification. Simultaneously, a three-dimensional laser scanning device is used to scan the blast pile. The three-dimensional laser scanning device is equipped with a leveling component to ensure that the three-dimensional laser scanning head remains horizontal during the scanning process.

[0006] The aforementioned schemes utilize a 3D laser scanning-based identification and detection system to analyze the block size of rubble, achieving a certain degree of acquisition of block size characteristics in the region. However, the technology has some limitations. For example, the research object is limited to blasted piles within a fixed area, requiring the deployment of multiple 3D laser scanners, which disrupts the normal construction process and incurs high mechanical costs. Furthermore, identifying block size through data comparison necessitates strictly ensuring the accuracy of the bilateral database. Additionally, none of the schemes consider online scanning of fallen debris and rubble piles; analyzing block size solely from the perspective of blasted piles may introduce significant errors. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of the aforementioned background technology by providing an online scanning and automatic block size analysis scheme for crushed stone, thereby enabling online automatic analysis of the block size of collapsed rocks and piled rocks, and improving the application scope, efficiency, and reliability.

[0008] To achieve the above objectives, this invention provides an online stone scanning and automatic block size analysis system, including a fly rock scanning module, a rock pile transportation module, a stone crushing module, and a stone crushing classification module. The fly rock scanning module scans the fly rocks generated during operations in real time to obtain the block size characteristics of the fly rocks. The rock pile transportation module collects and transfers the detached fly rocks and rock piles to a belt conveyor. The stone crushing module scans the block size of the stone on the belt conveyor. The stone crushing classification module classifies the stone into different block size ranges and realizes classified transportation.

[0009] Furthermore, the flying stone scanning module includes a flying stone scanner, a first mounting frame, and a data receiving device; the flying stone scanner is fixed to the top of the first mounting frame, and the bottom of the first mounting frame is provided with rollers. Both the rollers and the flying stone scanner are capable of omnidirectional angle adjustment. The data receiving device is used to receive and upload the data from the flying stone scanner.

[0010] Furthermore, at least two of the flystone scanners are provided and arranged facing the working face. The data receiving device is fixed to the side wall of the roadway and communicates wirelessly with the flystone scanner. The data receiving device uploads the received data signals in real time to the mining area data analysis center.

[0011] Furthermore, the rockfill transport module includes a scraper, which is used to shovel and transport flying rocks and rockfill to the inlet end of the belt conveyor.

[0012] Furthermore, the gravel scanning module includes the belt conveyor, the second mounting frame, the gravel scanner, and the data receiving device. The gravel scanner is arranged above the belt conveyor and fixed by the second mounting frame. The gravel scanner and the data receiving device communicate wirelessly.

[0013] Furthermore, at least two lithotripsy scanners are provided, and the lithotripsy scanners are capable of rotating relative to the second mounting bracket to adjust the scanning angle.

[0014] Furthermore, the crushed stone sorting module includes a baffle hinge assembly, a crushed stone baffle, a sliding plate, a rail-mounted mine car, and a transfer belt conveyor. The crushed stone baffle is hinged to the belt conveyor via the baffle hinge assembly, which is also used to switch the state of the crushed stone baffle. The sliding plate is located on one side of the belt conveyor and is used to guide crushed stone with unqualified size to the rail-mounted mine car. The transfer belt conveyor is connected to the outlet end of the belt conveyor and is used to further transfer crushed stone with qualified size.

[0015] Furthermore, the baffle hinge assembly includes a first hinge seat and a second hinge seat. The first hinge seat is mounted on one side wall of the roadway via a transmission shaft and a rotary drive unit. The second hinge seat is mounted on the gravel baffle. A hinge chain is provided on the first hinge seat, and the hinge chain connects to the second hinge seat.

[0016] This invention also provides a method for online scanning and automatic block size analysis of crushed stone, specifically including the following steps:

[0017] S1 involves blasting or excavation at the underground tunnel working face. A flyrock scanner is used to scan flyrock in real time. The scanner transmits the data to a data receiving device, which then transmits it to the data analysis center at the mining site. The data analysis center averages the data to obtain the final flyrock size dataset FR. c ;

[0018] S2, the collapsed flying rocks and other rubble on the tunnel surface are transferred to a belt conveyor for transport. A secondary scan is performed at the location indicated by the crushed rock scanner. The scanner transmits the data to a data receiving device, which then uploads it to the data analysis center. The data analysis center performs average calculations on the received data to obtain the final determined crushed rock size dataset RP. c ;

[0019] S3, for the gravel block size dataset RP c Perform filtering, set a filtering threshold T, and set the batch block size percentage α according to production requirements; for example, dataset RP. c If the size of the crushed stone with a percentage α exceeds T, the hinged chain will place a crushed stone baffle until the crushed stone baffle is in contact with the belt conveyor. The crushed stone is then loaded into a rail car via a sliding plate and transported to the rock crushing device for secondary crushing.

[0020] Such as RP c If the percentage of block size α is within the range of T, the hinged chain pulls the crushed stone baffle to rotate around the hinge fulcrum. The crushed stone transported on the belt conveyor is directly transported from the outlet end to the transfer belt conveyor, and then transported to the surface mining area for processing and utilization.

[0021] The above-described solution of the present invention has the following beneficial effects:

[0022] The present invention provides an online scanning and automatic block size analysis scheme for crushed stone, which relies on three-dimensional laser scanning technology to obtain the block size characteristics of fly rocks or piled rocks in underground engineering. It establishes a complete set of online scanning and automatic analysis modes for rock block size from fly rock generation, piled rock transfer, and belt conveyor transportation, making rock block size measurement faster and more efficient. This scheme, combined with underground mining operations, transmits the obtained block size data to the ground mining data analysis center for real-time analysis and processing via wireless data transmission. It can intuitively analyze the engineering excavation efficiency, and thus provide important guidance for the improvement of blasting design schemes or tunneling equipment.

[0023] Other beneficial effects of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the gravel scanning module and the gravel sorting module of the present invention;

[0026] Figure 3 This is a schematic diagram of the installation of the lithotripter scanner of the present invention;

[0027] Figure 4 This is a schematic diagram of the baffle hinge assembly of the present invention.

[0028] [Explanation of Labels in the Attached Image]

[0029] 101-Flying stone scanner; 102-First mounting frame; 103-Roller; 201-Shovel loader; 301-Belt conveyor; 302-Second mounting frame; 303-Crushing stone scanner; 304-Crushing stone baffle; 305-Slide plate; 306-Rail-guided mine car; 307-Transfer belt conveyor; 308-First hinge seat; 309-Second hinge seat; 310-Drive shaft; 311-Hinge chain; 4-Data receiving device. Detailed Implementation

[0030] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0031] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this disclosure, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0032] It should also be noted that the illustrations provided in the following embodiments are merely schematic representations of the basic concept of this disclosure. The drawings only show components relevant to this disclosure and are not drawn according to the actual number, shape, and size of the components in implementation. In actual implementation, the form, quantity, and proportion of each component can be arbitrarily changed, and the component layout may be more complex. Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0033] like Figure 1 As shown, an embodiment of the present invention provides an online scanning and automatic size analysis system for crushed stone, including: a fly rock scanning module, a rockfill transportation module, a crushed stone scanning module, and a crushed stone classification module. The fly rock scanning module scans fly rocks generated by blasting or excavation in real time to obtain their size characteristics. The rockfill transportation module collects and transports the detached fly rocks and rockfill to a belt conveyor 301. The crushed stone scanning module scans the size of the crushed stone on the belt conveyor 301. The crushed stone classification module classifies crushed stone into different size ranges and achieves classified transportation.

[0034] In this embodiment, the flystone scanning module includes two 3D laser scanners (flystone scanners 101), a first mounting bracket 102, and a data receiving device 4. The flystone scanners 101 are fixed to the top of the first mounting bracket 102. Rollers 103 are provided at the bottom of the first mounting bracket 102, and a horizontal full-angle rotating disk is connected between the support shaft of the rollers 103 and the first mounting bracket 102, allowing the rollers 103 to rotate at full angle and flexibly adjust the position of the flystone scanners 101. The first mounting bracket 102 and the flystone scanners 101 are also connected via a full-angle rotating disk, allowing the flystone scanners 101 to adjust their scanning angle.

[0035] During operation, two Flying Stone Scanners 101 are aligned along the same roadway and face the working face. The data receiving device 4 is fixed to the sidewall of the roadway and uses digital wireless transmission. An external signal enhancement antenna is connected to the right side of the device casing to upload the real-time received data signals to the mining area data analysis center.

[0036] In this embodiment, the rock dumping and transport module includes a scraper 201, which can operate in the tunnel and simultaneously shovel and transport the generated rock dumps and scattered flying rocks to the entrance of the belt conveyor 301 for further transport by the belt conveyor 301.

[0037] At the same time, such as Figure 3 As shown, in this embodiment, the gravel scanning module includes a belt conveyor 301 with inclined and horizontal sections, a second mounting frame 302, two 3D laser scanners (gravel scanners 303), and a data receiving device 4 shared with the flystone scanning module. The two gravel scanners 303 are respectively arranged at the beginning and end of the horizontal section of the belt conveyor 301 and fixed by the second mounting frame 302. The bottom end of the second mounting frame 302 is fixed to the frame structure of the belt conveyor 301, so that the gravel scanners 303 are supported above the horizontal section of the belt conveyor 301 to scan the conveyed gravel.

[0038] It should be noted that in this embodiment, a rotating structure is provided at the connection between the second mounting bracket 302 and the stone scanner 303 to rotate and adjust the stone scanner 303 to scan the stones on the belt conveyor 301 at a reasonable angle.

[0039] At the same time, such as Figure 4 As shown, in this embodiment, the crushed stone sorting module includes a baffle hinge assembly, a crushed stone baffle 304, a sliding plate 305, a rail-mounted mine car 306, and a conveyor belt 307. The baffle hinge assembly controls the state of the crushed stone baffle 304 to switch the conveying path of the crushed stone. Specifically, the baffle hinge assembly includes a first hinge seat 308 and a second hinge seat 309. The first hinge seat 308 is mounted on one side wall of the roadway via a drive shaft 310 and a rotary drive unit. The second hinge seat 309 is mounted in the middle of the crushed stone baffle. A hinge chain 311 is provided on the first hinge seat 308, connecting the second hinge seat 309.

[0040] One end of the crushed stone baffle 304 is hinged to the belt conveyor 301. The retractable and release hinge chain 311 is used to realize the rotation of the crushed stone baffle 304 around its hinge fulcrum, so that the material blocking part of the crushed stone baffle 304 is lowered onto the belt conveyor and blocks the material, so that the crushed stone changes the conveying direction along the crushed stone baffle; or the material blocking part of the crushed stone baffle 304 is raised, and the crushed stone continues to be conveyed along the belt conveyor to the outlet end.

[0041] Of course, in other embodiments, other types of drive control mechanisms for the crushed stone baffle 304 can also be provided, such as lifting screws, which can directly drive the crushed stone baffle 304 to lift as a whole, thereby completing the switching of the conveying direction of the belt conveyor 301.

[0042] In this embodiment, the top of the sliding plate 305 is connected to the outer edge of the belt conveyor 301, and the bottom is connected to the rail-mounted mine car 306. A transfer belt conveyor 307 is arranged on the roadway surface, and the segmented, inclined transfer belt conveyor 307 connects to the outlet end of the belt conveyor 301 for crushed stone transfer. The functions of the transfer belt conveyor 307 include, but are not limited to, transporting crushed stone to the hopper and lifting it to the mining area, or transporting it to other areas underground for direct use.

[0043] Based on the same inventive concept, this embodiment also provides a method for online scanning and automatic block size analysis of crushed stone, including the following steps:

[0044] S1 involves blasting or excavation at the underground tunnel working face, generating a large amount of flyrock. Flyrock scanners 101 perform real-time scanning and processing of the flyrock, and two flyrock scanners 101 obtain flyrock block size datasets: FR a =(n a1 n a2 , ..., n ai ), FR b =(n b1 n b2 , ..., n bi The Flying Stone scanner 101 transmits data wirelessly to the data receiving device 4, which then transmits it to the mining data analysis center. The data analysis center averages the received data using the following formula to obtain the final determined block size dataset FR. c :

[0045]

[0046] FR c =[n ci (2)

[0047] S2, the collapsed flying rocks and other rubble piled on the tunnel surface are shoveled and transported onto the belt conveyor 301. The belt conveyor 301 transports the rubble pile to a location equipped with two crushing stone scanners 303 for secondary scanning. The crushing stone scanners 303 scan the surface of the belt conveyor 301 to obtain a dataset of crushing stone: RP a =(m a1 m a2 , ..., m ai ), RP b =(m b1 mb2 , ..., m bi Similarly, the gravel scanner 303 transmits data to the data receiving device 4, and then uploads it to the data analysis center. The data analysis center obtains the gravel size dataset RP using formulas (1) and (2). c .

[0048] S3, for the gravel block size dataset RP c Perform filtering, setting a filtering threshold T, and setting the batch block size percentage α according to production requirements. For example, in dataset RP... c If the size of the crushed stone with a percentage α exceeds T, the crushed stone baffle 304 will operate. The hinged chain 311 will place the crushed stone baffle 304 until it is in contact with the belt conveyor 301. After the crushed stone is deflected, it will be loaded into the rail-mounted mine car 306 via the slide plate 305, and then transported to the rock crushing device for secondary crushing.

[0049] Such as RP c If the percentage of block size α is within the range of T, the hinged chain 311 pulls the crushed stone baffle 304 to rotate around the hinge fulcrum, and the material-blocking part of the crushed stone baffle 304 is vertically lifted to a certain height. The crushed stone transported on the belt conveyor 301 will be directly transported from the outlet end to the transfer belt conveyor 307, and then transported to the surface mining area for processing and utilization via the lifting bin, etc.

[0050] It should be noted that the flyrock size in S1 is ultimately obtained by the data analysis center. This data can indirectly analyze the rock's cutability: under the same tunneling or blasting conditions, the larger the flyrock size, the worse the rock's cutability; the smaller the size, the better the rock's cutability. This can provide important guidance for improving blasting design schemes (charge, drilling, etc.) or tunneling equipment. In addition, flyrock size can also assess the likelihood and severity of flyrock injuries and equipment damage, thus allowing for the development of corresponding measures and plans for different levels of potential hazards. The subsequent evaluation of crushed rock size is more focused on the sorting of rock fragments.

[0051] As described above, this method achieves the goal of crushed stone sorting. This scheme utilizes three-dimensional laser scanning technology to acquire the block size characteristics of flyrock or riprap in underground engineering. Based on its technical characteristics, a complete online scanning and automatic analysis mode for rock block size was established, encompassing flyrock generation, riprap shoveling, and belt conveyor transport. This makes rock block size measurement faster and more efficient. Combined with underground mining operations, the scheme wirelessly transmits the obtained block size data to the surface mining data center for real-time analysis and processing. This allows for intuitive analysis of engineering excavation efficiency, providing important guidance for improving blasting design schemes or tunneling equipment.

[0052] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for online scanning and automatic block size analysis of crushed stone, applied to an online scanning and automatic block size analysis system for crushed stone, characterized in that, The online stone scanning and automatic block size analysis system includes a fly rock scanning module, a rockfill transportation module, a stone crushing module, and a stone crushing classification module. The fly rock scanning module scans fly rocks generated during operations in real time to obtain their block size characteristics. The rockfill transportation module collects and transfers detached fly rocks and rockfill to a belt conveyor. The stone crushing module scans the block size of the stone on the belt conveyor. The stone crushing classification module classifies stone into different block size ranges and achieves classified transportation. The fly rock scanning module includes a fly rock scanner, a first mounting frame, and a data receiving device. The stone crushing module includes the belt conveyor, a second mounting frame, a stone crushing scanner, and a data receiving device shared with the fly rock scanning module. The stone crushing classification module includes a baffle hinge assembly, a stone crushing baffle, a sliding plate, a rail-mounted mine car, and a transfer belt conveyor. The online scanning and automatic size analysis method for crushed stone includes the following steps: S1 involves blasting or excavation at the underground tunnel working face. A flyrock scanner scans flyrock in real time, transmitting the data to a data receiving device, which then transmits it to the data analysis center at the mining site. The data analysis center averages the data to obtain the final flyrock size dataset. FR c ; S2, the collapsed flying rocks and other rubble on the tunnel floor are transferred to a belt conveyor for transport. A secondary scan is performed at the location indicated by the crushed rock scanner. The scanner transmits the data to a data receiving device, which then uploads it to the data analysis center. The data analysis center performs average calculations on the received data to obtain the final determined crushed rock size dataset. RP c ; S3, for the gravel block size dataset RP c Perform filtering and set the filtering threshold. T Set the batch block size percentage according to production requirements. α ; such as dataset RP c medium percentage α The size of the gravel exceeded T Then the baffle hinge assembly is placed on the crushed stone baffle until the crushed stone baffle is in contact with the belt conveyor. The crushed stone is loaded into the rail mine car via the slide plate and then transported to the rock crushing device for secondary crushing. like RP c Percentage of blocks satisfied α exist T Within the range, the baffle hinge assembly pulls the crushed stone baffle to rotate around the hinge fulcrum, and the crushed stone transported on the belt conveyor is directly transported from the outlet end to the transfer belt conveyor, and then transported to the surface mining area for processing and utilization.

2. The method for online scanning and automatic block size analysis of crushed stone according to claim 1, characterized in that, The flystone scanner is fixed to the top of the first mounting frame, and the bottom of the first mounting frame is provided with rollers. Both the rollers and the flystone scanner are capable of omnidirectional angle adjustment. The data receiving device is used to receive and upload the data from the flystone scanner.

3. The method for online scanning and automatic block size analysis of crushed stone according to claim 1, characterized in that, At least two flystone scanners are provided and arranged facing the working face. The data receiving device is fixed to the side wall of the roadway and communicates wirelessly with the flystone scanner. The data receiving device uploads the received data signals in real time to the mining area data analysis center.

4. The method for online scanning and automatic block size analysis of crushed stone according to claim 1, characterized in that, The rockfill transport module includes a scraper, which is used to shovel and transport flying rocks and rockfill to the inlet end of the belt conveyor.

5. The method for online scanning and automatic block size analysis of crushed stone according to claim 1, characterized in that, The stone crusher is positioned above the belt conveyor and fixed by the second mounting bracket. The stone crusher communicates wirelessly with the data receiving device.

6. The method for online scanning and automatic block size analysis of crushed stone according to claim 5, characterized in that, At least two lithotripsy scanners are provided, and the lithotripsy scanners can be rotated relative to the second mounting bracket to adjust the scanning angle.

7. The method for online scanning and automatic block size analysis of crushed stone according to claim 1, characterized in that, The crushed stone baffle is hinged to the belt conveyor via a baffle hinge assembly. The baffle hinge assembly is also used to switch the state of the crushed stone baffle. The sliding plate is located on one side of the belt conveyor and is used to guide crushed stone with unqualified block size to the rail mine car. The transfer belt conveyor is connected to the outlet end of the belt conveyor and is used to further transfer crushed stone with qualified block size.

8. The method for online scanning and automatic block size analysis of crushed stone according to claim 7, characterized in that, The baffle hinge assembly includes a first hinge seat and a second hinge seat. The first hinge seat is mounted on the side wall of the roadway via a transmission shaft and a rotary drive unit. The second hinge seat is mounted on the gravel baffle. A hinge chain is provided on the first hinge seat, and the hinge chain connects to the second hinge seat.

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