A tunnel blasting blasthole angle precision control auxiliary device

Abstract

The present invention relates to an auxiliary device for precise control of the angle of a tunnel blasting blasthole, comprising a leg assembly, a horizontal plane angle adjustment assembly, a vertical plane angle adjustment assembly and a sleeve ranging assembly connected in sequence. The vertical plane angle adjustment assembly comprises a vertical plane angle dial and a vertical plane pointer. The sleeve ranging assembly rotates along the vertical plane, driving the vertical plane pointer to rotate relative to the vertical plane angle dial. The horizontal plane angle adjustment assembly comprises a horizontal plane angle dial and a horizontal plane pointer; the vertical plane angle adjustment assembly rotates along the horizontal plane, driving the horizontal plane pointer to rotate relative to the horizontal plane angle dial. The level of the device can be accurately adjusted by cooperating with a horizontal indicating mechanism provided on the leg assembly and the horizontal plane angle dial, the horizontal rotation angle of the sleeve can be accurately controlled by the horizontal plane angle adjustment assembly, the vertical rotation angle of the sleeve can be accurately controlled by the vertical plane angle adjustment assembly, the depth of the blasthole can be indicated by the ranging mechanism, and the angle and depth of the blasthole can be accurately calibrated.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel and laneway blasting construction, and in particular to an auxiliary device for accurately controlling the blasthole angle during blasting. Background Art

[0002] The drilling and blasting method is to excavate rocks by drilling, charging, and blasting. It is convenient, flexible, and highly adaptable to geological conditions. At present, it is still one of the most important methods for tunnel excavation. The accurate measurement and determination of the position, depth, and angle of the tunnel blasting blasthole has positive practical significance for the subsequent explosive filling and blockage, the prevention of premature explosion and explosion refusal safety accidents, and the guarantee of blasting effect and tunnel forming quality. At present, air-leg drilling rigs are generally used to drill tunnel blastholes. The accuracy of blasthole parameters is highly dependent on the operator's experience level. There are common problems such as poor drilling positioning of blastholes and inconsistent depth of the same type of blastholes. The blasthole angle is usually difficult to measure accurately, and the depth is generally estimated by blasting sticks, with a large data error range; the angle deviation cannot be monitored in real time during the blasthole drilling process. This results in unsatisfactory tunnel blasting effect, widespread over-excavation and under-excavation, large surrounding rock disturbance, poor surrounding forming quality, high engineering repair rate, low construction efficiency, and further leads to high support costs during the tunnel construction period and high maintenance costs during the service period, which is far from meeting the requirements for safe and efficient tunnel excavation. Summary of the invention

[0003] The technical problem to be solved by the present invention is that currently, air-leg drilling rigs are generally used to drill tunnel blastholes. The accuracy of blasthole parameters is highly dependent on the operator's experience level. There are common problems such as poor blasthole drilling positioning, inconsistent depths of the same type of blastholes, and the inability to accurately measure blasthole angles. The depth is generally estimated by probing with a blasting stick, resulting in a large data error range.

[0004] In order to solve the above technical problems, the present invention proposes a tunnel blasting borehole angle precise control auxiliary device, comprising a leg assembly, a horizontal angle adjustment assembly, a vertical angle adjustment assembly and a sleeve ranging assembly connected in sequence.

[0005] The sleeve ranging assembly comprises a sleeve for loading a drill pipe and a ranging mechanism, wherein the ranging mechanism is fixed to the sleeve.

[0006] The vertical plane angle adjustment assembly includes a vertical plane angle dial and a vertical plane pointer; the sleeve distance measuring assembly rotates along the vertical plane, driving the vertical plane pointer to rotate relative to the vertical plane angle dial, or driving the vertical plane angle dial to rotate relative to the vertical plane pointer.

[0007] The horizontal plane angle adjustment assembly includes a horizontal plane angle dial and a horizontal plane pointer; a horizontal indicating mechanism is arranged on the horizontal plane angle dial; the vertical plane angle adjustment assembly rotates along the horizontal plane, driving the horizontal plane pointer to rotate relative to the horizontal plane angle dial, or driving the horizontal plane angle dial to rotate relative to the horizontal plane pointer.

[0008] The leg assembly is connected to the horizontal plane angle adjustment assembly in a manner that prevents the horizontal plane angle adjustment assembly from rotating in a horizontal circumferential direction.

[0009] The tunnel blasting blasthole angle precision control auxiliary device adjusts the level of the device by cooperating with the horizontal indicating mechanism set on the horizontal plane angle dial through the support leg assembly, and accurately controls the horizontal rotation angle of the sleeve through the horizontal plane angle adjustment assembly, and accurately controls the vertical rotation angle of the sleeve through the vertical plane angle adjustment assembly. The drill rod installed in the sleeve rotates synchronously, and the blasthole depth is indicated by the distance measuring mechanism. It has a high degree of automation, can accurately measure the blasthole angle and depth, and the measurement data has high accuracy.

[0010] As a further improvement of the tunnel blasting blasthole angle precise control auxiliary device of the present invention, the distance measuring mechanism includes a red laser and a display component, both of which are fixed on the sleeve; the direction of the light beam emitted by the red laser is parallel to the axial direction of the sleeve; the display component includes a main control chip, a display screen and a power supply, and the main control chip is electrically connected to the red laser, the display screen and the power supply respectively; the red laser senses the blasthole depth data and transmits the data to the main control chip, and the main control chip displays the result on the display screen.

[0011] As a further improvement of the tunnel blasting borehole angle precision control auxiliary device of the present invention, the leg assembly includes a vertical tube, a height locking screw and a plurality of leg groups; each leg group includes a telescopic leg, a lock, a leg tube and a linkage rod. The lower end of the horizontal plane angle adjustment assembly is inserted into the vertical tube, can move up and down along the vertical tube, and can be fixed to each other by the height locking screw. The lower end of the telescopic leg is supported on the ground, and the upper end is inserted into the leg tube and fixed by the lock; the end of the leg tube away from the telescopic leg is hinged to the upper end of the vertical tube. A sliding ring is sleeved on the outside of the vertical tube, one end of the linkage rod is hinged to the sliding ring, and the other end of the linkage rod is hinged to the end of the leg tube close to the telescopic leg.

[0012] As a further improvement of the tunnel blasting borehole angle precise control auxiliary device of the present invention, a movable buckle is sleeved on the outside of one end of the leg tube close to the telescopic leg, the linkage rod is hinged to the movable buckle, and the movable buckle can move along the leg tube and can be fixed to the leg tube by screws.

[0013] As a further improvement of the tunnel blasting borehole angle precise control auxiliary device of the present invention, the horizontal plane angle adjustment assembly also includes a straight rod-shaped height telescopic shaft; the height telescopic shaft vertically passes through the center of the horizontal plane angle dial and is fixed to each other; the horizontal plane pointer is fixed to the vertical plane angle adjustment assembly; the lower section of the height telescopic shaft is inserted into the vertical tube and is fixed to each other by the height locking screw; a vertical slide groove is arranged in the vertical tube, and a protruding block is arranged at the lower end of the height telescopic shaft, and the protruding block is embedded in the slide groove to prevent the height telescopic shaft from rotating horizontally relative to the vertical tube.

[0014] As a further improvement of the tunnel blasting borehole angle precise control auxiliary device of the present invention, the vertical plane angle adjustment assembly also includes a rotating tube; the rotating tube is sleeved outside the height telescopic shaft, can perform horizontal circumferential rotation, and are fixed to each other by a horizontal rotating locking screw; the horizontal plane pointer is fixed to the outer side of the lower end of the rotating tube.

[0015] As a further improvement of the tunnel blasting borehole angle precise control auxiliary device of the present invention, the vertical plane angle dial is fixed to the upper end side wall of the rotating tube, and the vertical plane pointer is fixed to the sleeve ranging assembly; the sleeve ranging assembly rotates around the central axis of the vertical plane angle dial and can be fixed to the vertical plane angle dial by vertically rotating a locking screw.

[0016] As a further improvement of the tunnel blasting borehole angle precision control auxiliary device of the present invention, a U-shaped frame is fixedly welded under the sleeve, and a bolt is passed through the upper end of the rotating tube, vertically through the center of the vertical plane angle dial and through the two side walls of the U-shaped frame in sequence, and another bolt is passed through the rotating tube and the vertical plane angle dial in sequence; the vertical plane angle dial has an arc-shaped opening concentric with the outer circumference of the disk, and the vertical plane pointer is fixed to a side of the U-shaped frame adjacent to the vertical plane angle dial, and the vertical plane pointer passes through the arc-shaped opening.

[0017] As a further improvement of the tunnel blasting borehole angle precision control auxiliary device of the present invention, fluorescent bars are provided on the vertical plane angle dial, the vertical plane pointer, the horizontal plane angle dial and the horizontal plane pointer to display the indicated values ​​in a dim environment. In another improved manner, transparent areas can be provided on the surfaces of the vertical plane angle dial and the horizontal plane angle dial, and LED lights are provided inside the transparent areas to display the test values ​​in a dim environment.

[0018] As a further improvement of the tunnel blasting borehole angle precision control auxiliary device of the present invention, the horizontal indicating mechanism is a transverse bubble level and a longitudinal bubble level arranged on the horizontal plane angle dial.

[0019] As a further improvement of the tunnel blasting blasthole angle precise control auxiliary device of the present invention, the blasthole angle precise control auxiliary device also includes a deviation correction alarm assembly, which can monitor the change of the blasthole angle in real time. When the set positioning angle deviates, it automatically alarms and emits a buzzer and a flashing indicator light.

[0020] The present invention displays the flatness of the instrument through the position of the horizontal bubble between the horizontal bubble level and the vertical bubble level, thereby improving the fixing accuracy of the instrument. By adjusting the height and level of the support legs, adjusting the horizontal and vertical angles of the sleeve and positioning and locking it, the horizontal and vertical angles can be adjusted. After the angle is accurately positioned, the air leg drill rod is passed through the sleeve to achieve precise control of the angles of blast holes in different parts, reducing the error of the previous experience-based judgment of the blast hole angle, ensuring the accuracy of the blast hole position and angle control, and improving the drilling accuracy of the tunnel blast hole. This is an important means to achieve tunnel vibration reduction and loss reduction and improve the quality of surrounding rock formation, and is also a prerequisite for achieving the expected tunnel blasting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the tunnel blasting blasthole angle precision control auxiliary device of the present invention.

[0022] Figure numerals: telescopic leg 101, lock 102, leg tube 103, vertical tube 104, height locking screw 105, linkage rod 106, horizontal plane angle dial 201, transverse bubble level 202, longitudinal bubble level 203, horizontal plane pointer 204, height telescopic shaft 205, horizontal rotation locking screw 301, vertical plane angle dial 302, vertical plane pointer 303, rotating tube 304, sleeve 401, red laser 402, deviation correction alarm assembly 501. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0024] The invention provides a tunnel blasting blasthole angle precision control auxiliary device, comprising a leg assembly, a horizontal plane angle adjustment assembly, a vertical plane angle adjustment assembly and a sleeve distance measurement assembly which are connected in sequence.

[0025] like Figure 1As shown, the sleeve ranging assembly includes a sleeve 401 for loading a drill pipe and a ranging mechanism, and the ranging mechanism includes a red laser 402 and a display component, both of which are fixed on the sleeve 401. The direction of the light beam emitted by the red laser 402 is parallel to the axial direction of the sleeve. The display component includes a main control chip, a display screen and a power supply, and the main control chip is electrically connected to the red laser 402, the display screen and the power supply respectively. The red laser 402 senses the blasthole depth data and transmits the data to the main control chip, and the main control chip displays the result on the display screen. Among them, the sleeve 401 is a cylindrical empty tube, and the drill pipe of the air leg drill used for drilling the blasthole can be fixed in the empty tube. The sleeve 401 can be replaced according to the diameter of the drill pipe. The red laser 402 is welded to the upper surface of the sleeve 401 through an eight-shaped bracket, and the display screen is fixed inside the eight-shaped bracket. When in use, point the laser toward the wall of the blasthole to be drilled, and the drill rod of the air leg drill will be synchronously pointed in the direction indicated by the laser. The worker can also observe the blasthole depth data on the display screen to improve the drilling accuracy, and it is easy to use.

[0026] The vertical plane angle adjustment assembly includes a vertical plane angle dial 302, a vertical plane pointer 303 and a rotating tube 304. The vertical plane pointer 303 is relatively fixed on the sleeve 401. The sleeve 401 rotates along the vertical plane, driving the vertical plane pointer 303 to rotate relative to the vertical plane angle dial 302. The angle of the pointer rotation is the angle of the sleeve 401 rotation, which is also the angle of the drill rod of the air leg drill, thereby accurately controlling the angle of the blasthole.

[0027] Specifically, a U-shaped frame is fixedly welded below the sleeve 401, and the upper bolts are passed horizontally through the upper section of the rotating tube 304, through the center of the vertical angle dial 302, and through the two side walls of the U-shaped frame in sequence, and the lower bolts are passed horizontally through the rotating tube 304 and the vertical angle dial 302 in sequence, so that the vertical angle dial 302 is fixed to the upper end side wall of the rotating tube 304, and the sleeve 401 can be rotated with the upper bolt (equivalent to the central axis of the vertical angle dial 302) as the rotation axis, and the rotated sleeve 401 can be fixed to the vertical angle dial 302 by vertically rotating the locking screw (the screw is horizontal) to fix the angle of the blasthole.

[0028] The vertical plane angle dial 302 has an arc-shaped opening which is concentric with the outer circumference of the disk. The vertical plane pointer 303 is fixed to a side of the U-shaped frame adjacent to the vertical plane angle dial 302. The vertical plane pointer 303 vertically passes through the arc-shaped opening. The vertical plane pointer 303 rotates along the arc-shaped opening according to the rotation of the sleeve 401, and cooperates with the scale on the vertical plane angle dial 302 to display the vertical rotation angle, so as to realize the angle adjustment of the sleeve 401 within the range of 180° in the vertical direction and lock and fix it by vertically rotating the locking screw to realize the vertical angle adjustment and fixation of the drill rod.

[0029] The horizontal plane angle adjustment assembly includes a horizontal plane angle dial 201, a horizontal plane pointer 204 and a straight rod-shaped height telescopic shaft 205. The height telescopic shaft 205 vertically passes through the center of the horizontal plane angle dial 201 and is fixed to each other. A horizontal indicating mechanism is set on the horizontal plane angle dial 201. The horizontal indicating mechanism is a horizontal bubble level 202 and a vertical bubble level 203 set on the horizontal plane angle dial 201. The horizontality of the instrument is displayed by the horizontal bubble position between the horizontal bubble level 202 and the vertical bubble level 203, thereby improving the fixing accuracy of the instrument. The angle adjustment range of the horizontal plane angle dial 201 is 0° to 360°; the angle adjustment range of the vertical plane angle dial 302 is 0° to 180°, and a larger angle adjustment range, such as 0° to 210°, can also be set. The angle markings of the horizontal plane angle dial 201 and the vertical plane angle dial 302 are both in decimal (10° is a large grid), and the minimum measurement accuracy is 0.1°, which meets the positioning and accuracy requirements of different types of blastholes. The horizontal bubble level 202 can check whether the device is horizontal in the horizontal direction and detect the tilt direction. The horizontal bubble level 202 is embedded in the horizontal rotation angle dial. It is a tempered glass tube with a longitudinal curved shape. The tube is filled with liquid and a small bubble is left. The glass tube has scale divisions at both ends of the bubble. The sensitivity of the horizontal bubble level 202 is 0.02mm / m. The structure of the longitudinal bubble level 203 is the same as that of the horizontal bubble level, which can meet the requirements of longitudinal horizontal detection. The horizontal and vertical bubble levels can realize the horizontal and tilt adjustment of two dimensions in the horizontal plane. When the bubbles in the horizontal bubble level 202 and the vertical bubble level 203 are both in the middle of the glass tube, the horizontal plane angle dial 201 is in a horizontal state, the rotating tube 304 is in a vertical state, the vertical plane angle dial 302 is in a vertical state, and the sleeve 401 can also rotate within the vertical plane range, and the blasthole angle can be accurately controlled. When the bubbles in the horizontal bubble level 202 and the vertical bubble level 203 are not in the middle of the glass tube, the leg assembly can be adjusted to adjust the level.

[0030] The rotating tube 304 is sleeved on the height telescopic shaft 205. The rotating tube 304 can rotate horizontally around the axis of the height telescopic shaft 205 as the rotation center, and the rotating tube 304 does not move in the vertical direction. When the rotating tube 304 is adjusted to the target angle, it can be fixed to the height telescopic shaft 205 by horizontally rotating the locking screw 301. The horizontal plane pointer 204 is fixed to the outer side of the lower end of the rotating tube 304 and rotates synchronously with the rotating tube 304.

[0031] The rotating tube 304 rotates along the horizontal plane, driving the sleeve 401 and the red laser 402 at the upper end to rotate horizontally and circumferentially, and driving the horizontal plane pointer 204 at the lower end to rotate relative to the horizontal plane angle dial 201, so as to achieve the purpose of accurately adjusting the horizontal rotation angle of the sleeve 401, and the drill rod inside the sleeve 401 also rotates synchronously to control the angle of the blasthole.

[0032] The level of the device is adjusted by cooperating with the horizontal indicating mechanism provided on the support leg assembly and the horizontal plane angle dial 201. The horizontal rotation angle of the sleeve is accurately controlled by the relative rotation of the horizontal plane angle dial 201 and the horizontal plane pointer 204. The vertical rotation angle of the sleeve is accurately controlled by the vertical plane angle adjustment assembly. The drill rod installed in the sleeve rotates synchronously. The depth of the blasthole is indicated by the distance measuring mechanism. The device as a whole has a high degree of automation, can accurately measure the angle and depth of the blasthole, and the measurement data has high accuracy.

[0033] The leg assembly includes a vertical tube 104, a triangular height locking screw 105 and three leg groups. Each leg group includes a telescopic leg 101, a lock 102, a leg tube 103 and a linkage rod 106. The lower end of the telescopic leg 101 is supported on the ground, and the upper end is inserted into the leg tube 103 and fixed by the lock 102. One end of the leg tube 103 away from the telescopic leg 101 is hinged to the upper end of the vertical tube 104.

[0034] The lower end of the vertical tube 104 is sleeved with a sliding ring, which can slide up and down along the vertical tube 104. One end of the linkage rod 106 is hinged to the sliding ring, and the height of the device is adjusted when the sliding ring slides up. When it slides up to the maximum distance, three leg groups can be stored. An active buckle is sleeved on the outside of one end of the leg tube 103 close to the telescopic leg 101, and the other end of the linkage rod 106 is hinged to the active buckle. The active buckle can move along the leg tube 103 and can be fixed to the leg tube 103 by screws for easy storage.

[0035] The telescopic legs 101 are made of high-strength stainless steel, and the bottom end is a gyro cone, which provides a stable fulcrum for the installation of the instrument. The lock 102 has the functions of opening and locking. When the height of the device needs to be adjusted, the lock 102 is in the open state. When the required height is reached, the lock 102 is locked to achieve the fixed height adjustment locking function. The leg tubes 103 are hollow structures, and there are three of them, so as to achieve a triangular stable structure. The length of the legs can be adjusted by pulling the telescopic legs 101 outward and pushing them inward, so as to adjust the height and level of the device. When the bubbles in the horizontal bubble level 202 and the vertical bubble level 203 are not in the middle of the glass tube, the horizontal plane angle dial 201 is not in a horizontal state, and the horizontal adjustment purpose can be achieved by adjusting the extension length of the three telescopic legs 101.

[0036] The lower section of the height telescopic shaft 205 is inserted into the vertical tube 104, and the movement direction is limited to moving up and down along the vertical tube 104, and the height locking screws 105 are used to fix each other. The movement direction restriction measures are as follows: a vertical sliding groove is set on the inner wall of the vertical tube 104, and there can be multiple sliding grooves. A protruding block is set at the lower end of the height telescopic shaft 205, and the protruding block is embedded in the sliding groove to prevent the height telescopic shaft 205 from rotating horizontally relative to the vertical tube 104. When there are multiple sliding grooves and multiple protruding blocks, each protruding block can be embedded in a sliding groove to prevent the height telescopic shaft 205 from rotating horizontally, and only the height adjustment in the vertical direction can be performed. Preventing the height telescopic shaft 205 from rotating horizontally and only allowing the rotating tube 304 sleeved on the upper end of the height telescopic shaft 205 to rotate along the horizontal plane can accurately control the horizontal rotation angle of the sleeve 401 and eliminate interference factors. The height telescopic shaft 205 can realize secondary adjustment of the height of the whole device, which is convenient for fine-tuning the height of the device again. The height locking screw 105 can fix the relative position of the vertical tube 104 and the height telescopic shaft 205 to realize locking of the height of the device.

[0037] In one embodiment, fluorescent bars are provided on the vertical plane angle dial 302, the vertical plane pointer 303, the horizontal plane angle dial 201 and the horizontal plane pointer 204, so that the indicated value can be automatically displayed in a dim environment. In another embodiment, a transparent area can be provided on the surface of the vertical plane angle dial 302 and the horizontal plane angle dial 201, and an LED lamp is provided inside the transparent area. The LED lamp is connected to the main control chip through a wire and powered by a power supply to turn on the LED in a dim environment, etc., so that the test value can be displayed. The angle numbers on the horizontal plane angle dial 201 are marked with Arabic numerals and have a luminous display function. They can also be reflected and highlighted when illuminated by a mining lamp, and data can be read in a complex environment.

[0038] The blasthole angle precise control auxiliary device also includes a deviation correction alarm assembly 501, which is connected to the main control chip via a wire and can monitor the change of the blasthole angle in real time. When the set positioning angle deviates, the main control chip controls the deviation correction alarm assembly 501 to alarm, emit a buzzing sound and a flashing indicator light.

[0039] The present invention displays the flatness of the instrument through the position of the horizontal bubble between the horizontal bubble level 202 and the vertical bubble level 203, thereby improving the fixing accuracy of the instrument. By adjusting the height and level of the legs, adjusting the horizontal and vertical angles of the sleeve and positioning and locking it, the horizontal and vertical angles can be adjusted. After the angle is accurately positioned, the air leg drill rod is passed through the sleeve to achieve precise control of the angles of blast holes in different parts, reducing the error of the previous experience-based judgment of the blast hole angle, ensuring the accuracy of the blast hole position and angle control, and improving the drilling accuracy of the tunnel blast hole. This is an important means to achieve tunnel vibration reduction and loss reduction and improve the quality of surrounding rock forming, and is also a prerequisite for achieving the expected tunnel blasting effect.

Claims

1. A tunnel blasting hole angle precision control auxiliary device, characterized by: It includes a leg assembly, a horizontal plane angle adjustment assembly, a vertical plane angle adjustment assembly and a sleeve distance measurement assembly which are connected in sequence; The sleeve distance measuring assembly comprises a sleeve (401) for loading a drill pipe and a distance measuring mechanism, wherein the distance measuring mechanism is fixed to the sleeve (401); The vertical plane angle adjustment assembly comprises a vertical plane angle dial (302) and a vertical plane pointer (303); the sleeve distance measuring assembly rotates along the vertical plane, driving the vertical plane pointer (303) to rotate relative to the vertical plane angle dial (302), or driving the vertical plane angle dial (302) to rotate relative to the vertical plane pointer (303); The horizontal plane angle adjustment assembly comprises a horizontal plane angle dial (201) and a horizontal plane pointer (204); a horizontal indicating mechanism is arranged on the horizontal plane angle dial (201); the vertical plane angle adjustment assembly rotates along the horizontal plane, driving the horizontal plane pointer (204) to rotate relative to the horizontal plane angle dial (201), or driving the horizontal plane angle dial (201) to rotate relative to the horizontal plane pointer (204); The leg assembly is connected to the horizontal plane angle adjustment assembly in a manner that prevents the horizontal plane angle adjustment assembly from rotating in a horizontal circumferential direction; the leg assembly comprises a vertical tube (104), a height locking screw (105) and a plurality of leg groups; each leg group comprises a telescopic leg (101), a locking buckle (102), a leg tube (103) and a linkage rod (106); The lower end of the horizontal plane angle adjustment assembly is inserted into the vertical tube (104), can move up and down along the vertical tube (104), and can be fixed to each other by the height locking screw (105); The lower end of the telescopic leg (101) is supported on the ground, and the upper end is inserted into the leg tube (103) and fixed by the lock buckle (102); one end of the leg tube (103) away from the telescopic leg (101) is hinged to the upper end of the vertical tube (104); The outside of the vertical tube (104) is sleeved with a sliding ring, one end of the linkage rod (106) is hinged to the sliding ring, and the other end of the linkage rod (106) is hinged to one end of the leg tube (103) close to the telescopic leg (101); the horizontal plane angle adjustment assembly also includes a straight rod-shaped height telescopic shaft (205); the height telescopic shaft (205) vertically passes through the center of the horizontal plane angle dial (201) and is fixed to each other; the horizontal plane pointer (204) is fixed to the vertical plane angle adjustment assembly; the lower section of the height telescopic shaft (205) is inserted into the vertical tube (104) and is fixed to each other by the height locking screw (105); a vertical sliding groove is arranged in the vertical tube (104), and a protruding block is arranged at the lower end of the height telescopic shaft (205), and the protruding block is embedded in the sliding groove.

2. The tunnel blasting hole angle precise control auxiliary device according to claim 1 is characterized by: The distance measuring mechanism comprises a red laser (402) and a display component, both of which are fixed on the sleeve (401); the direction of the light beam emitted by the red laser (402) is parallel to the axial direction of the sleeve; the display component comprises a main control chip, a display screen and a power supply, and the main control chip is electrically connected to the red laser (402), the display screen and the power supply respectively; the red laser (402) senses blasthole depth data and transmits the data to the main control chip, and the main control chip displays the result on the display screen.

3. The tunnel blasting blasthole angle precise control auxiliary device according to claim 1 is characterized by: A movable buckle is sleeved on the outside of one end of the leg tube (103) close to the telescopic leg (101), and the linkage rod (106) is hinged to the movable buckle. The movable buckle can move along the leg tube (103) and can be fixed to the leg tube (103) by screws.

4. The tunnel blasting hole angle precise control auxiliary device according to claim 1 is characterized by: The vertical plane angle adjustment assembly also includes a rotating tube (304); the rotating tube (304) is sleeved outside the height telescopic shaft (205), can perform horizontal circumferential rotation, and is fixed to each other by a horizontal rotating locking screw (301); the horizontal plane pointer (204) is fixed to the outer side of the lower end of the rotating tube (304).

5. The tunnel blasting hole angle precision control auxiliary device according to claim 4 is characterized by: The vertical plane angle dial (302) is fixed to the upper end side wall of the rotating tube (304), and the vertical plane pointer is fixed to the sleeve distance measuring assembly; the sleeve distance measuring assembly rotates around the central axis of the vertical plane angle dial (302) and can be fixed to the vertical plane angle dial (302) by vertically rotating a locking screw.

6. The tunnel blasting hole angle precise control auxiliary device according to claim 5 is characterized by: A U-shaped frame is fixedly welded below the sleeve (401), and a bolt is passed through the upper end of the rotating tube (304), vertically through the center of the vertical plane angle dial (302) and through the two side walls of the U-shaped frame in sequence, and another bolt is passed through the rotating tube (304) and the vertical plane angle dial (302) in sequence; the vertical plane angle dial (302) has an arc-shaped opening with the same center as the outer circumference of the disk, and the vertical plane pointer (303) is fixed to a side of the U-shaped frame adjacent to the vertical plane angle dial (302), and the vertical plane pointer (303) passes through the arc-shaped opening.

7. The tunnel blasting hole angle precision control auxiliary device according to claim 1 is characterized by: Fluorescent strips are provided on the vertical plane angle scale (302), the vertical plane pointer (303), the horizontal plane angle scale (201) and the horizontal plane pointer (204).

8. The tunnel blasting hole angle precise control auxiliary device according to claim 1 is characterized by: The horizontal indication mechanism is a transverse bubble level (202) and a longitudinal bubble level (203) arranged on the horizontal plane angle scale (201).

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