Tunnel excavation blast hole partition lofting device

Abstract

The utility model discloses a tunnel excavation blast hole partition lofting device which is used for lofting blast holes of a tunnel face, the tunnel excavation blast hole partition lofting device comprises a rack, a plurality of laser projection devices and a power supply system, and the rack is provided with a plurality of lofting partitions which are arranged at intervals; the laser projection devices and the lofting subareas are arranged in a one-to-one correspondence mode, the laser projection devices project to a tunnel face to form a blast hole lofting projection area used for covering the whole tunnel face, and projection coincidence allowance is reserved between blast hole lofting projections of every two adjacent laser projection devices; the power supply system is arranged on the rack and is electrically connected with the laser projection devices, and continuity and integrity of a lofting point are ensured through cooperation of the plurality of laser projection devices.

Description

Technical Field

[0001] This utility model relates to the field of tunnel engineering construction technology, and in particular, to a tunnel excavation blast hole zoning and layout device. Background Technology

[0002] In tunnel drilling and blasting construction, borehole setting out is a crucial step in controlling the excavation direction and profile accuracy. Traditional borehole setting out methods mainly use a combination of a total station and a prism, requiring each setting out point to be measured on the tunnel face and marked with physical markers or paint. This method has disadvantages such as being time-consuming, the physical markers being easily damaged, and the setting out personnel having to work for extended periods on the dangerous tunnel face.

[0003] In recent years, laser surveying technology has been gradually applied in tunnel construction, but it still has significant limitations. Due to the limitation of the laser emission angle, the projection area is directly proportional to the distance from the laser source to the projection surface. If a large area needs to be surveyed, the laser source needs to be placed at a distance from the working face (usually more than 20 meters). However, in actual construction, there are often various obstructions (such as excavation platforms, machinery, etc.) between the laser source and the projection surface, leading to the loss of surveying points or surveying failure. Utility Model Content

[0004] This utility model provides a tunnel excavation blast hole zoning and layout device to solve the technical problem of how to ensure the continuity and integrity of the layout points.

[0005] According to the present invention, a tunnel excavation blast hole zoning and layout device is provided for laying out blast holes at the tunnel face. The tunnel excavation blast hole zoning and layout device includes a frame, several laser projection devices, and a power supply system. Several layout zones are arranged at intervals on the frame. The laser projection devices are arranged one-to-one with the layout zones. The laser projection devices project onto the tunnel face to form a blast hole layout projection area that covers the entire tunnel face. A projection overlap margin is maintained between the blast hole layout projections of two adjacent laser projection devices. The power supply system is located on the frame and electrically connected to the laser projection devices.

[0006] Furthermore, the laser projection device includes a mounting box and a lofting laser. The mounting box is detachably installed in the lofting section, and the lofting laser is mounted on the mounting box and electrically connected to the power system.

[0007] Furthermore, the laser projection device also includes a galvanometer disposed at the emission port of the lofting laser.

[0008] Furthermore, a number of device targets for positioning the mounting box are provided on the outside of the mounting box.

[0009] Furthermore, the target of the device is made of a highly reflective material.

[0010] Furthermore, the mounting box includes a box body and a turntable rotatably connected to the box body, and the lofting laser is disposed on the turntable.

[0011] Furthermore, the turntable has a slot on its periphery, and the box body has a locking pin that cooperates with the slot.

[0012] Furthermore, the mounting box is equipped with a protective cover for protecting the surveying laser.

[0013] Furthermore, wheels for moving the platform are installed at the bottom of the platform.

[0014] Furthermore, positioning targets are set on the layout area.

[0015] This utility model has the following beneficial effects:

[0016] In this utility model of a tunnel excavation borehole zoning and layout device, the tunnel face is divided into multiple areas, and the layout zones on the platform are matched one by one with the areas divided on the face. This ensures that each laser projection device is responsible for laying out the corresponding area on the face. This setup not only shortens the distance between the laser surface and the projection surface, effectively avoiding the problem of laser obstruction caused by long distances in traditional methods, but also maintains a projection overlap margin between adjacent laser projection devices when setting up the borehole layout. In specific implementation, a 20% projection overlap area is reserved between each area to ensure the continuity and integrity of the layout points. Even if there is obstruction in some areas, complete information can be obtained through the overlapping area.

[0017] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0019] Figure 1 This is a schematic diagram of the tunnel excavation blast hole zoning and layout device according to a preferred embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of a laser projection device according to a preferred embodiment of the present invention;

[0021] Figure 3This is a cross-sectional view of the laser projection device according to a preferred embodiment of the present invention.

[0022] Legend:

[0023] 100. Working face;

[0024] 200. Stand; 201. Lofting area; 202. Wheels; 203. Positioning target;

[0025] 300. Laser projection device; 301. Mounting box; 302. Box body; 303. Turntable; 304. Slot; 305. Locking pin;

[0026] 306. Equipment target; 307. Protective cover; 308. Lofting laser; 309. Galvanometer;

[0027] 400. Power supply system. Detailed Implementation

[0028] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0029] like Figure 1 As shown, this utility model discloses a tunnel excavation blast hole zoning and layout device, used for laying out blast holes at the tunnel face 100. The tunnel excavation blast hole zoning and layout device includes a platform 200, a plurality of laser projection devices 300, and a power supply system 400. The platform 200 is provided with a plurality of layout zones 201 arranged at intervals. The laser projection devices 300 are arranged one-to-one with the layout zones 201. The plurality of laser projection devices 300 project onto the tunnel face 100 to form a blast hole layout projection area that covers the entire tunnel face 100. A projection overlap margin is maintained between the blast hole layout projections of two adjacent laser projection devices 300. The power supply system 400 is disposed on the platform 200 and electrically connected to the laser projection devices 300.

[0030] In this embodiment, the frame 200 is welded from I-beams into one piece. The frame 200 includes a skeleton and diagonal braces. A total of 7 layout sections 201 are provided on the skeleton, which are distributed at intervals on the outer side of the skeleton. Specifically, the top of the skeleton is provided with a layout section 201 corresponding to the top of the working face 100, and the left and right sides of the skeleton are provided with 3 sets of layout sections 201 corresponding to the sides of the working face 100. The laser projection device 300 is set in the same way as the layout sections 201. This setting can not only shorten the distance between the laser surface and the projection surface, effectively avoiding the problem of laser being blocked by obstructions due to the long distance in the traditional method, but also, when setting the laser projection device 300, a projection overlap margin is reserved between the borehole layout projections of two adjacent laser projection devices 300. In specific implementation, a 20% projection overlap area is reserved between each area to ensure the continuity and integrity of the layout points. Even if there is obstruction in some areas, complete information can be obtained through the overlap area. Multiple laser projection devices 300 are used in conjunction to ensure the continuity and integrity of the layout points.

[0031] In practice, the laser emission angle of the laser projection device 300 is 60°, and the distance between the device and the working face is 6m. During the layout process, the total station is used for auxiliary measurement, and multiple laser projection devices 300 are used in coordination to ensure the continuity and integrity of the layout points.

[0032] like Figure 2-3 As shown, the laser projection device 300 includes a mounting box 301 and a layout laser 308. The mounting box 301 is detachably mounted on the layout section 201, and the layout laser 308 is mounted on the mounting box 301 and electrically connected to the power system 400.

[0033] In this embodiment, the mounting box 301 is bolted to the layout section 201, making the mounting box 301 and the platform 200 an integrated unit. This avoids the loss of accuracy of the laser projection equipment caused by frequent movement of the platform 200. As the platform 200 moves forward with the construction progress, the layout laser 308 also moves accordingly, always maintaining the optimal distance between the layout laser 308 and the corresponding working face 100 area, thereby ensuring the accuracy of the layout. The power supply system 400 is fixed on the platform 200 and is used to supply power to the layout laser 308.

[0034] Furthermore, the laser projection device 300 also includes a galvanometer 309 disposed at the emission port of the lofting laser 308.

[0035] In this embodiment, setting a galvanometer 309 at the emission port of the layout laser 308 can enable rapid projection of complex patterns and control the borehole positioning deviation within 3cm, which is far higher than the accuracy of traditional total station layout.

[0036] Furthermore, a plurality of device targets 306 for positioning the mounting box 301 are provided on the outside of the mounting box 301.

[0037] In this embodiment, the setting of the equipment target 306 facilitates the precise positioning of the mounting box 301. In specific implementation, it is also necessary to set positioning targets 203 on each layout section 201 on the platform 200. The total station is used to measure the seven positioning targets 203 on the layout section 201 to obtain the position and attitude information of the platform 200 in the construction coordinate system. Then, the total station is used to measure the equipment target 306. The position of the laser emission port is confirmed by combining the measurement information of the positioning target 203, which facilitates the laser projection device 300 to complete the layout of the blast holes on the working face 100.

[0038] Furthermore, the equipment target 306 is made of a highly reflective material. In this embodiment, in order to facilitate the positioning of the stakeout laser 308, the equipment target 306 is made of a highly reflective material, which makes it easier for the total station to quickly obtain the position of the stakeout laser 308, and then confirm the coordinate position of the blast hole on the working face 100 through the stakeout laser 308.

[0039] Furthermore, the mounting box 301 includes a box body 302 and a turntable 303 rotatably connected to the box body 302, and the lofting laser 308 is disposed on the turntable 303. In this embodiment, the turntable 303 on the box body 302 can drive the lofting laser 308 to rotate circumferentially, thereby ensuring that the angle of the lofting laser 308 is adjustable when it is being corrected, so that the lofting laser 308 has the most suitable lofting angle.

[0040] Furthermore, the turntable 303 has a slot 304 on its circumference, and the housing 302 has a locking pin 305 that cooperates with the slot 304. In this embodiment, the slot 304 and the locking pin 305 are used to facilitate the circumferential positioning of the turntable 303. This ensures that the lofting laser 308 is circumferentially fixed after the angle is adjusted.

[0041] Furthermore, the mounting box 301 is provided with a protective cover 307 for protecting the lofting laser 308. In this embodiment, the protective cover 307 on the mounting box 301 is used to protect the lofting laser 308 located in the protective cover 307, and to prevent falling objects on the working face 100 from damaging the lofting laser 308. The protective cover 307 can be made of transparent bulletproof glass.

[0042] Furthermore, wheels 202 for moving the platform 200 are installed at the bottom of the platform 200. In this embodiment, the wheels 202 at the bottom of the platform 200 facilitate the movement of the platform 200 along the excavation route of the tunnel.

[0043] Furthermore, positioning targets 203 are set on the layout partition 201. In specific implementation, positioning targets 203 also need to be set on each layout partition 201 on the platform 200. The seven positioning targets 203 on the layout partition 201 are measured using a total station to obtain the position and attitude information of the platform 200 in the construction coordinate system. Then, the equipment target 306 is measured using a total station. The position of the laser emission port is confirmed by combining the measurement information of the positioning targets 203, which facilitates the laser projection device 300 to complete the layout of the blast holes on the working face 100.

[0044] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for zoning and setting out a blast hole for a tunnel face (100), characterized in that The utility model relates to a laser projection device for blasthole lofting of coal face, which comprises: a rack (200) provided with a plurality of lofting subareas (201) arranged at intervals; a plurality of laser projection devices (300) corresponding to the lofting subareas (201), the plurality of laser projection devices (300) projecting to a coal face (100) to form a blasthole lofting projection area for covering the whole coal face (100), and a projection overlap margin being reserved between the blasthole lofting projections of two adjacent laser projection devices (300); a power supply system (400) arranged on the rack (200) and electrically connected with the laser projection devices (300).

2. The tunnel excavation blasthole zoning layout device according to claim 1, characterized in that, The laser projection device (300) comprises a mounting box (301) and a lofting laser (308), the mounting box (301) is detachably mounted on the lofting subarea (201), and the lofting laser (308) is arranged on the mounting box (301) and electrically connected with the power supply system (400).

3. The tunnel excavation blasthole zoning layout device according to claim 2, characterized in that, The laser projection device (300) further comprises a galvanometer (309) arranged at a transmitting port of the lofting laser (308).

4. The tunnel excavation blasthole zoning layout device according to claim 2, characterized in that, A plurality of equipment targets (306) for positioning the mounting box (301) are arranged outside the mounting box (301).

5. The tunnel excavation blasthole zoning layout device according to claim 4, characterized in that, The equipment targets (306) are made of high-reflective material.

6. The tunnel excavation blasthole zoning layout device according to claim 2, wherein, The mounting box (301) comprises a box body (302) and a rotating disc (303) rotatably connected to the box body (302), and the lofting laser (308) is arranged on the rotating disc (303).

7. The tunnel excavation blasthole zoning layout device according to claim 6, characterized in that, A clamping groove (304) is formed in the circumferential side of the rotating disc (303), and a clamping pin (305) matched with the clamping groove (304) is arranged on the box body (302).

8. The tunnel excavation blasthole zoning layout device according to claim 2, characterized in that, A protective cover (307) for protecting the lofting laser (308) is arranged on the mounting box (301).

9. The device according to any one of claims 1 to 8, wherein, Wheels (202) for moving the rack (200) are mounted on the bottom of the rack (200).

10. The device according to any one of claims 1 to 8, wherein, Positioning targets (203) are arranged on the lofting subareas (201).

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