Mine underground cut blasting blast hole calibration device based on drill jumbo

Abstract

The utility model provides a mine underground cut blasting hole calibration device based on a drill jumbo, and belongs to the field of geotechnical engineering.The mine underground cut blasting hole calibration device based on the drill jumbo comprises a hole calibration device body, a PLC, a signal transmitting unit and a signal receiving unit; through the cooperation of the signal transmitting unit and the signal receiving unit, the position information of the blast hole can be accurately detected and transmitted, so that the position of the blast hole calibration device can be accurately adjusted by the PLC, and marking near a target blast hole is facilitated; meanwhile, according to the fed-back target blast hole length information and the rock mass hardness information detected by the rock mass hardness tester, the PLC determines accurate data, given by the blast hole calibration device, of an agent needed by blasting of the blast hole near the blast hole, and controls the code spraying device to spray the accurate amount of the agent needed by blasting of the blast hole near the blast hole; in this way, follow-up manual filling operation of the blast hole with the accurate quantity of the agents is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of geotechnical engineering, in particular to a mine underground slotting blasting blasthole calibration device based on a rock drilling jumbo. BACKGROUND

[0002] In the underground slotting blasting operation of a gold mine, accurate construction of blastholes is a key link to ensure blasting effect and mine safety. The existing technology mainly relies on manual measurement and marking to determine the amount of explosives used in blasting. This method has low construction efficiency and blasting accuracy.

[0003] Among them, the handheld laser range finder used in the existing technology combined with manual marking method is prone to cumulative error under complex geological conditions, and the error range can reach 15-20 cm. Such error not only affects the blasting effect, but also may lead to a decrease in ore recovery rate, and even cause safety accidents. Moreover, the underground operation environment is poor, with high dust concentration and humidity. The conventional laser device scatters seriously in such environment, and the positioning failure rate exceeds 40%. High concentration of dust and water vapor not only reduces the penetration ability of laser, but also increases the maintenance frequency and cost of equipment. In addition, the rock drilling jumbo will produce vibration amplitude when working, which will cause displacement error of the traditional fixed support, and further affect the accuracy of determining the amount of explosives used in blasting. Moreover, the error caused by vibration will accumulate over time, eventually leading to greater error in determining the amount of explosives used in blasting, and affecting the blasting effect.

[0004] Therefore, it is necessary to design a mine underground slotting blasting blasthole calibration device based on a rock drilling jumbo to solve the above problems. CONTENT OF THE INVENTION

[0005] In view of the technical problems in the background art, the present application provides a mine underground slotting blasting blasthole calibration device based on a rock drilling jumbo. The device uses a blasthole calibration device, a PLC controller, a signal transmitting unit and a signal receiving unit to feed back the detected blasthole information to the PLC controller. At the same time, the rock mass hardness tester in the blasthole calibration device detects the hardness of the rock mass and feeds back the information to the PLC controller. The PLC controller calculates the amount of explosives required for blasting the target blasthole according to the feedback information, and controls the inkjet device in the blasthole calibration device to mark the amount of explosives required for blasting the target blasthole near the target blasthole. This way, the amount of explosives required for blasting the blasthole is accurately determined, which can improve the construction efficiency and blasting effect, and ensure the safety of mine production.

[0006] This application provides a borehole calibration device for underground blasting in a mine based on a rock drilling rig, including: a borehole calibration device, a PLC controller, a signal transmitting unit, and a signal receiving unit installed on the boom of the rock drilling rig;

[0007] The signal transmitting unit is used to detect the location of the blast hole and transmit the information to the signal receiving unit;

[0008] The signal receiving unit is used to transmit the information transmitted by the signal transmitting unit to the PLC controller;

[0009] The PLC controller adjusts the position of the borehole calibration device according to the information transmitted by the signal receiving unit.

[0010] The borehole calibration device is used to mark the quantity of explosives required for blasting the target borehole near the target borehole; the quantity of explosives required for the target borehole is calculated by the PLC controller based on the feedback target borehole length information.

[0011] In the technical solution of this application embodiment, the cooperation of the signal transmitting unit and the signal receiving unit can accurately detect and transmit the location information of the blast hole, enabling the PLC controller to accurately adjust the position of the blast hole calibration device, thereby facilitating marking near the target blast hole. Simultaneously, based on the feedback of the target blast hole length information, the PLC controller determines the precise data of the explosives required for blasting near the target blast hole, facilitating subsequent manual filling of the target blast hole with precise explosive quantities. The automated blast hole calibration device can quickly complete the calibration work, shortening the preparation time for slotting blasting and improving overall operational efficiency. Furthermore, this device, mounted on the boom of the drilling rig, can adapt to different mine environments and blast hole locations, exhibiting strong environmental adaptability.

[0012] In some embodiments, the borehole calibration device includes a coding device.

[0013] In some embodiments, the borehole calibration device further includes a rock hardness tester mounted on the boom of the rock drilling rig; the inkjet printer is placed on the rock hardness tester.

[0014] In some embodiments, the rock mass hardness tester is used to determine the hardness of the rock mass;

[0015] The rock hardness tester transmits the measured rock hardness information to the PLC controller. Based on the preset data, the PLC controller outputs the amount of explosive required for blasting the blast hole and then controls the marking device to mark the amount of explosive required for blasting the target blast hole near the target blast hole.

[0016] In the technical solution of this application embodiment, the hardness of the rock mass is measured by a rock hardness tester, and the precise amount of explosive required for blasting the target borehole is calculated based on this information. This ensures that each borehole can reduce resource waste while guaranteeing high blasting effect, and also reduces the impact on the surrounding environment.

[0017] In some embodiments, a plurality of hydraulic columns are provided between the rock hardness tester and the coding device; the hydraulic columns are used to adjust the distance between the coding device and the rock hardness tester.

[0018] In this embodiment, by setting a hydraulic column between the rock hardness tester and the coding device, the position of the coding device can be further adjusted so that the digital markings printed by the coding device are closer to the target borehole, thus avoiding confusion between the marking symbols of different boreholes.

[0019] In some embodiments, the rock hardness tester includes a rebound hammer mounted on the boom of the rock drilling rig and a rebound hammer probe mounted on the rebound hammer; the signal receiving unit is mounted on the rebound hammer.

[0020] In some embodiments, the coding device includes a coding device connected to the rebound spring and a printhead disposed on the coding device.

[0021] In some embodiments, the signal transmitting unit includes a Wi-Fi signal transmitter.

[0022] In some embodiments, the signal receiving unit includes a Wi-Fi signal receiver for receiving information from the Wi-Fi signal transmitter.

[0023] In some embodiments, the number of Wi-Fi signal transmitters is no less than three.

[0024] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in this application will be briefly described below. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0026] Fig. 1 This is a schematic diagram of a mine underground slotting blasting borehole calibration device based on a rock drilling rig in an embodiment of this application.

[0027] Fig. 2 This is a schematic diagram illustrating the application scenario of the mine underground slotting and blasting borehole calibration device based on a rock drilling rig in this application embodiment.

[0028] Explanation of reference numerals in the attached figures:

[0029] 11. Marking device; 111. Marker; 112. Nozzle; 12. Rock hardness tester; 121. Rebound hammer; 122. Rebound hammer probe; 13. Hydraulic column; 21. WiFi signal transmitter; 31. WiFi signal receiver; 32. Antenna; 4. Drilling rig boom; 5. Working face; 61. Drilling rig; 62. Drill rod. Detailed Implementation

[0030] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0032] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0033] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0034] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0035] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0036] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0037] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0038] Current technologies for determining the quantity of explosives used in blasting boreholes employ a handheld laser rangefinder combined with manual marking. This method is prone to cumulative errors under complex geological conditions. Therefore, it is crucial to rationally design a calibration device to accurately determine the quantity of explosives used in blasting boreholes.

[0039] To address the aforementioned technical problems, this application provides a borehole calibration device for underground blasting in mines based on a rock drilling rig. The device comprises a borehole calibration unit, a PLC controller, a signal transmitting unit, and a signal receiving unit. The detected borehole location is fed back to the PLC controller, which then moves the borehole calibration device to the vicinity of the target borehole. Simultaneously, a rock hardness tester 12 within the borehole calibration device detects the hardness of the rock mass and feeds this information back to the PLC controller. The PLC controller calculates the required amount of explosives for blasting the target borehole based on this feedback and controls a marking device 11 within the borehole calibration device to mark the required amount of explosives near the target borehole. This precise determination of the required explosives for blasting the borehole improves construction efficiency and blasting effectiveness.

[0040] For ease of explanation, the following embodiments will be described using an example of a mine underground blasting borehole calibration device based on a rock drilling rig.

[0041] Please refer to Figs. 1-2 The underground blasting borehole calibration device based on a rock drilling rig provided in this application includes: a borehole calibration device, a PLC controller, a signal transmitting unit, and a signal receiving unit installed on the boom 4 of the rock drilling rig.

[0042] The signal transmitting unit is used to detect the location of the blast hole and transmit the information to the signal receiving unit;

[0043] The signal receiving unit is used to transmit the information transmitted by the signal transmitting unit to the PLC controller;

[0044] The PLC controller adjusts the position of the borehole calibration device according to the information transmitted by the signal receiving unit.

[0045] The borehole calibration device is used to mark the quantity of explosives required for blasting the target borehole near the target borehole; the quantity of explosives required for the target borehole is calculated by the PLC controller based on the feedback target borehole length information.

[0046] In this way, the signal transmitting and receiving units feed back the detected blast hole positions to the PLC controller. Based on the feedback, the PLC controller precisely adjusts the position of the blast hole calibration device to facilitate subsequent marking near the target blast hole. Simultaneously, based on the feedback target blast hole length information, the PLC controller determines the precise data of the explosive charge required for blasting near the target blast hole, facilitating subsequent manual filling of the target blast hole with accurate explosive quantities. The automated blast hole calibration device can quickly complete the calibration work, shortening the preparation time for slotting blasting and improving overall operational efficiency and blasting effect. Furthermore, this device, mounted on the boom 4 of the drilling rig, can adapt to different mine environments and blast hole positions, exhibiting strong environmental adaptability.

[0047] Furthermore, in this embodiment of the application, the borehole calibration device includes a coding device 11.

[0048] Furthermore, in this embodiment of the application, the borehole calibration device further includes a rock hardness tester 12 mounted on the boom 4 of the rock drilling rig; the inkjet printer 11 is mounted on the rock hardness tester 12.

[0049] Furthermore, in this embodiment of the application, the rock mass hardness tester 12 is used to determine the hardness of the rock mass;

[0050] The rock hardness tester 12 transmits the measured rock hardness information to the PLC controller. The PLC controller outputs the amount of explosive required for blasting the blast hole based on preset data, and then controls the marking device 11 to mark the amount of explosive required for blasting the target blast hole near the target blast hole.

[0051] It should be noted that the preset data in the PLC controller can be stored in the PLC controller before the equipment is used. For example, before using the equipment, a rock hardness tester 12 can be used manually to test the rock mass in the mine and calculate the corresponding amount of explosive required for blasting. Then, the rock hardness data and explosive amount data can be input into the PLC controller. In this way, after the rock hardness tester 12 measures the rock hardness information and transmits this information to the PLC controller, the PLC controller can automatically determine the amount of explosive required for blasting in the borehole.

[0052] In this way, the rock hardness information measured by the rock hardness tester 12 is transmitted to the PLC controller. The calculation module in the PLC controller calculates the precise amount of explosive required for blasting the blast hole based on the rock hardness and the length of the blast hole (based on the length of the rock layer drilled by the drill rod 62). This ensures that each blast hole can reduce resource waste while ensuring high blasting effect, and also reduces the impact on the surrounding environment.

[0053] In some embodiments, a plurality of hydraulic columns 13 are provided between the rock hardness tester 12 and the coding device 11; the hydraulic columns 13 are used to adjust the distance between the coding device 11 and the rock hardness tester 12.

[0054] In this way, by adjusting the height of the hydraulic column 13, the distance between the coding device 11 and the target borehole can be further refined, so that the digital markings printed by the coding device 11 are closer to the position of the target borehole, avoiding confusion between the marking symbols of different boreholes.

[0055] In some embodiments, the rock hardness tester 12 includes a rebound hammer 121 mounted on the boom 4 of the rock drilling rig and a rebound hammer probe 122 mounted on the rebound hammer 121; the signal receiving unit is mounted on the rebound hammer 121.

[0056] An air pump is provided between the rebound hammer 121 and the rock drilling rig boom 4, and the air pump is used to drive the linear movement of the rebound hammer 121.

[0057] In some embodiments, the coding device 11 includes a coding machine 111 connected to the rebound spring 121 and a printhead 112 disposed on the coding machine 111.

[0058] In some embodiments, the signal transmitting unit includes a Wi-Fi signal transmitter 21.

[0059] In some embodiments, the signal receiving unit includes a Wi-Fi signal receiver 31 for receiving information from the Wi-Fi signal transmitter 21.

[0060] In order to ensure that the Wi-Fi signal receiver 31 can receive information at high speed and accurately, the Wi-Fi signal receiver 31 is provided with an antenna 32.

[0061] Understandably, in order to ensure accurate measurement of the location of the blast hole, the number of Wi-Fi signal transmitters 21 shall not be less than three.

[0062] Example

[0063] Please refer to Figs. 1-2 The blast hole calibration device for underground mining based on a rock drilling rig provided in this embodiment includes: a blast hole calibration device, a PLC controller, a signal transmitting unit, and a signal receiving unit installed on the boom 4 of the rock drilling rig.

[0064] The signal transmitting unit is used to detect the location of the blast hole and transmit the information to the signal receiving unit;

[0065] The signal receiving unit is used to transmit the information transmitted by the signal transmitting unit to the PLC controller;

[0066] The PLC controller adjusts the position of the borehole calibration device according to the information transmitted by the signal receiving unit.

[0067] The borehole calibration device is used to mark the quantity of explosives required for blasting the target borehole near the target borehole; the quantity of explosives required for the target borehole is calculated by the PLC controller based on the feedback target borehole length information.

[0068] The borehole calibration device includes an inkjet printer 11 and a rock hardness tester 12 mounted on one end of the boom 4 of the rock drilling rig; the inkjet printer 11 is placed on the rock hardness tester 12.

[0069] The rock hardness tester 12 transmits the measured rock hardness information to the PLC controller. The PLC controller outputs the amount of explosive required for blasting the blast hole based on preset data, and then controls the marking device 11 to mark the amount of explosive required for blasting the target blast hole near the target blast hole.

[0070] Four hydraulic columns 13 are provided between the rock hardness tester 12 and the coding device 11; the hydraulic columns 13 are used to adjust the distance between the coding device 11 and the rock hardness tester 12.

[0071] The rock hardness tester 12 includes a rebound hammer 121 connected to one end of the rock drilling rig boom 4, and a rebound hammer probe 122 mounted on the rebound hammer 121; the rebound hammer probe 122 is located near one end of the rock layer; and the signal receiving unit is located at the bottom of the rebound hammer 121.

[0072] The rebound hammer 121 is movably connected to one end of the rock drilling rig boom 4 via an air pump, which is used to drive the movement of the rebound hammer 121.

[0073] The coding device 11 includes a coding machine 111 connected to the rebound spring 121 and a printhead 112 disposed on the coding machine 111.

[0074] The signal transmitting unit includes a Wi-Fi signal transmitter 21.

[0075] The signal receiving unit includes a Wi-Fi signal receiver 31 for receiving information from the Wi-Fi signal transmitter 21.

[0076] The Wi-Fi signal receiver 31 is equipped with an antenna 32.

[0077] The number of Wi-Fi signal transmitters 21 is three.

[0078] The working principle of the mine underground blasting borehole calibration device based on a rock drilling rig in this embodiment is explained below:

[0079] S1. The drilling rig 61 of the rock drilling rig sends the drill rod 62 to the target rock layer to drill a hole, and then performs blasting operation on the blast hole; during blasting, three reference points are determined at the working face 5 of the tunnel, and the three reference points are evenly distributed around the blast hole (i.e. the three reference points are arranged in a triangle).

[0080] S2. The three Wi-Fi signal transmitters 21 are fixed at the three calibration points determined in step S1 by rigid connection; wherein the plane formed by the three signal transmitters is parallel to the working face 5; at the same time, the borehole calibration device is installed on the boom 4 of the rock drilling rig; the Wi-Fi signal receiver 31 is installed on the borehole calibration device; the Wi-Fi signal transmitter 21 detects the position of the borehole and transmits the information to the Wi-Fi signal receiver 31.

[0081] S3, the Wi-Fi signal receiver 31 transmits the information from the Wi-Fi signal transmitter 21 to the PLC controller; the PLC controller adjusts the position of the borehole calibration device according to the transmitted information, specifically including:

[0082] First, adjust the boom 4 of the rock drilling rig and move the boom 4 of the rock drilling rig to the vicinity of the blast hole (that is, move the blast hole calibration device to the vicinity of the blast hole); among which, keep the distance between the rock hardness tester 12 and the working face 5 no more than 10cm.

[0083] Furthermore, the hydraulic column 13 is adjusted to bring the inkjet printer 111 closer to the vicinity of the target borehole.

[0084] S4. Next, turn on the air pump to move the rebound hammer 121 towards the blast hole and make the rebound hammer probe 122 on the rebound hammer 121 contact the working face 5. After the rebound hammer probe 122 detects the hardness of the rock mass, it transmits the information to the PLC controller. The calculation module in the PLC controller calculates the amount of explosive required for blasting the blast hole based on the rock mass hardness information and the length information of the blast hole drilled by the drill rod 62. Then, it controls the inkjet marking device 11 to mark the amount of explosive required for blasting the target blast hole near the target blast hole (this formula is obtained from experience. The data in this embodiment is: the Protodyakonov hardness coefficient of the rock mass is 13, the length of the blast hole is 3m, and the length of a single roll of explosive is 20cm. The calculated charge is 10 rolls, totaling 3.0kg). That is, the inkjet marking device 11 sprays the number "10" near the blast hole.

[0085] Please refer to the following: Figs. 1-2 According to one or more embodiments of this application, the mine underground slotting blasting borehole calibration device based on a rock drilling rig provided by this application includes a borehole calibration device, a PLC controller, a signal transmitting unit, and a signal receiving unit. Through the cooperation of the signal transmitting unit and the signal receiving unit, the location information of the borehole can be accurately detected and transmitted, enabling the PLC controller to precisely adjust the position of the borehole calibration device, thus facilitating marking near the target borehole. Simultaneously, based on the feedback of the target borehole length information and rock hardness information, the PLC controller determines the precise data of the explosives required for blasting the target borehole near the borehole, facilitating subsequent manual filling of the target borehole with precise explosive quantities. This borehole calibration device can quickly complete the calibration work, shortening the preparation time for slotting blasting and improving overall operational efficiency.

[0086] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A device for calibrating blast holes in underground mining operations based on a rock drilling rig, characterized in that, include: A borehole calibration device, a PLC controller, a signal transmitting unit, and a signal receiving unit are installed on the boom of the rock drilling rig. The signal transmitting unit is used to detect the location of the blast hole and transmit the information to the signal receiving unit; The signal receiving unit is used to transmit the information transmitted by the signal transmitting unit to the PLC controller; The PLC controller adjusts the position of the borehole calibration device according to the information transmitted by the signal receiving unit. The borehole calibration device is used to mark the quantity of explosives required for blasting the target borehole near the target borehole; the quantity of explosives required for the target borehole is calculated by the PLC controller based on the feedback target borehole length information.

2. The mine underground blasting borehole calibration device based on a rock drilling rig according to claim 1, characterized in that, The borehole calibration device includes an inkjet printer.

3. The mine underground blasting borehole calibration device based on a rock drilling rig according to claim 2, characterized in that, The borehole calibration device also includes a rock hardness tester mounted on the boom of the rock drilling rig; the inkjet printer is placed on the rock hardness tester.

4. The mine underground blasting borehole calibration device based on a rock drilling rig according to claim 3, characterized in that, The rock mass hardness tester is used to determine the hardness of rock mass; The rock hardness tester transmits the measured rock hardness information to the PLC controller. Based on the preset data, the PLC controller outputs the amount of explosive required for blasting the blast hole and then controls the marking device to mark the amount of explosive required for blasting the target blast hole near the target blast hole.

5. The mine underground blasting borehole calibration device based on a rock drilling rig according to claim 3, characterized in that, Several hydraulic columns are provided between the rock hardness tester and the coding device; the hydraulic columns are used to adjust the distance between the coding device and the rock hardness tester.

6. The mine underground blasting borehole calibration device based on a rock drilling rig according to claim 4, characterized in that, The rock hardness tester includes a rebound hammer mounted on the boom of the rock drilling rig and a rebound hammer probe mounted on the rebound hammer; the signal receiving unit is mounted on the rebound hammer.

7. The mine underground blasting borehole calibration device based on a rock drilling rig according to claim 6, characterized in that, The coding device includes a coding device connected to the rebound spring and a printhead disposed on the coding device.

8. The mine underground blasting borehole calibration device based on a rock drilling rig according to claim 1, characterized in that, The signal transmitting unit includes a Wi-Fi signal transmitter.

9. The mine underground blasting borehole calibration device based on a rock drilling rig according to claim 8, characterized in that, The signal receiving unit includes a Wi-Fi signal receiver for receiving information from the Wi-Fi signal transmitter.

10. The mine underground slotting blasting borehole calibration device based on a rock drilling rig according to claim 8, characterized in that, The number of Wi-Fi signal transmitters shall not be less than three.

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