Auxiliary measuring device for control blasting construction of open-air large mine

Abstract

The invention discloses an auxiliary measuring device for open-air large mine controlled blasting construction, which comprises a rigid first holding rod and a rigid second holding rod, the first holding rod and the second holding rod are in telescopic connection, the length of the second holding rod is greater than that of the first holding rod, the top end of the first holding rod is provided with a graduated scale, and the graduated scale is connected with the second holding rod. The graduated scale is rotatably connected with the first holding rod, a camera shooting assembly, a lighting assembly and a control assembly are arranged at the bottom end of the second holding rod, the camera shooting assembly is used for shooting pictures at the bottom end of a blast hole, the lighting assembly is used for providing lighting during shooting, and the control assembly comprises a signal transmission module and a power supply module. The power supply module is used for supplying power to the lighting assembly and the camera shooting assembly, and the signal transmission module is used for transmitting shot blast hole bottom end pictures to a background terminal. According to the measuring device, measuring errors caused by bending and deformation of the soft material during measurement can be avoided, so that the accuracy of blast hole measurement is ensured, and an accurate data basis is provided for blasting construction.

Description

Technical Field

[0001] The invention relates to the technical field of mine blasting construction measurement, and in particular to an auxiliary measurement device for controlled blasting construction in a large open-pit mine. Background Art

[0002] In the controlled blasting construction of large open-pit mines, blasthole measurement is a crucial task. Accurate blasthole measurement is of great significance to blasting effect, safety and engineering cost control. However, the traditional blasthole measurement structure has many problems.

[0003] Traditional blasthole measurement structures usually use soft materials, which perform poorly when encountering some complex situations inside the blasthole. When the blasthole is deep, the soft material is difficult to maintain a straight state due to its own flexibility and is prone to bending and deformation. In addition, if there are hard obstacles such as fallen stones in the blasthole, the soft material is very likely to bend when it comes into contact with them.

[0004] This bending phenomenon will cause serious deviations in the measurement results and fail to accurately reflect the true parameters of the blasthole. Inaccurate measurement data may lead to errors in the calculation of blasting charge, affect the blasting effect, and may even cause safety accidents. At the same time, it will also bring many uncertainties and risks to the subsequent construction and cost budget of the project.

[0005] In summary, the traditional blasthole measurement structure can no longer meet the requirements of measurement accuracy and reliability in controlled blasting construction in large open-pit mines. A more effective auxiliary measurement device is urgently needed to solve these problems. Summary of the invention

[0006] The purpose of the present invention is to provide an auxiliary measuring device for controlled blasting construction in large open-pit mines, in view of the fact that traditional blasthole measurement structures can no longer meet the requirements of measurement accuracy and reliability in controlled blasting construction in large open-pit mines. The device can avoid measurement errors caused by bending and deformation of soft materials during measurement, thereby ensuring the accuracy of blasthole measurement, providing an accurate data basis for blasting construction, and ensuring the reliability and safety of blasting effects.

[0007] The present invention is achieved through the following technical solutions:

[0008] The present invention provides an auxiliary measuring device for controlled blasting construction in large open-pit mines, comprising a rigid first holding rod and a second holding rod, wherein the first holding rod and the second holding rod are telescopically connected, the length of the second holding rod is greater than that of the first holding rod, a scale is provided at the top end of the first holding rod, and the scale is rotatably connected to the first holding rod, and a camera assembly, a lighting assembly and a control assembly are provided at the bottom end of the second holding rod, wherein the camera assembly is used for photographing a picture at the bottom end of a blast hole, the lighting assembly is used for providing lighting during photographing, the control assembly comprises a signal transmission module and a power supply module, the power supply module is used for supplying power to the lighting assembly and the camera assembly, and the signal transmission module is used for transmitting the photographed picture at the bottom end of the blast hole to a background terminal.

[0009] As a preferred solution of the present invention, a through hole is axially provided inside the first holding rod, and the second holding rod is slidably sleeved in the through hole.

[0010] As a preferred solution of the present invention, the cross section of the through hole is rectangular.

[0011] As a preferred solution of the present invention, a fastener is provided between the first holding rod and the second holding rod, and the fastener is used to lock the relative telescopic length of the first holding rod and the second holding rod.

[0012] As a preferred embodiment of the present invention, a rotation axis is provided at the intersection of the first holding rod and the scale, and the scale is rotatable around the rotation axis.

[0013] As a preferred embodiment of the present invention, the scale marks of the scale are coated with a long-lasting luminous material.

[0014] As a preferred solution of the present invention, a slot is provided on one side of the bottom end of the second holding rod, and the control component is arranged in the slot.

[0015] As a preferred solution of the present invention, a cover plate is provided on one side of the bottom end of the second holding rod to close the entrance of the card slot.

[0016] As a preferred solution of the present invention, an anti-slip pad is provided on the outer surface of the first holding rod.

[0017] As a preferred solution of the present invention, the first holding rod and the second holding rod are made of titanium alloy material.

[0018] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0019] 1. In the present invention, by setting the first holding rod and the second holding rod, when measuring the blasthole, the first holding rod and the second holding rod are stretched. The first holding rod and the second holding rod are retractable and rigid, which can effectively overcome the problem that soft materials are easy to bend. Even when the hole is deep or encounters hard obstacles, they can remain straight, thereby ensuring the accuracy of measurement and significantly improving the accuracy of blasthole measurement. With the rigid and retractable first holding rod and the second holding rod, the error caused by bending and deformation of soft materials during measurement is effectively avoided, providing an accurate data basis for blasting construction and ensuring the reliability and safety of blasting effects;

[0020] 2. The present invention provides a rotatable scale to make the measurement of the borehole diameter easier and more efficient. The scale adopts high-precision scale marks and is connected to the first holding rod through a rotating shaft. When measuring the borehole diameter, the scale is rotated to make it contact with the borehole, and the scale value is read to obtain accurate diameter data, thereby reducing the cumbersome steps in the measurement process, saving time and labor costs, and improving the convenience of the measurement operation. Accurate measurement results are helpful to reasonably calculate the blasting charge and optimize the blasting plan, thereby improving the quality and efficiency of the blasting construction and ensuring the quality of the blasting construction;

[0021] 3. In the present invention, a camera assembly, a lighting assembly and a control assembly are provided inside the bottom end of the second holding rod, and a signal transmission module and a power supply module are provided in the control assembly. The power supply module supplies power to the lighting assembly and the camera assembly. The camera assembly can shoot the situation at the bottom of the blast hole, and transmit the shot picture to the background terminal through the signal transmission module, so as to facilitate observation of whether debris such as gravel appears at the bottom of the blast hole. At the same time, the power supply module can have a wireless charging function, which is convenient for replenishing power at any time at the construction site to ensure the continuous and stable operation of the lighting assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of the auxiliary measurement device for controlled blasting construction in open-pit large-scale mines of the present invention in storage;

[0024] Figure 2 This is a schematic diagram of the overall structure of the auxiliary measuring device for controlled blasting construction in a large open-pit mine of the present invention in a stretched state;

[0025] Figure 3It is a schematic diagram of the overall structure of the back side of the auxiliary measuring device for controlled blasting construction in open-pit large-scale mines of the present invention in a stretched state;

[0026] Figure 4 It is a schematic diagram of the overall structure of the second holding rod in the auxiliary measuring device for controlled blasting construction in open-pit large-scale mines of the present invention;

[0027] Figure 5 This is a schematic diagram of the exploded overall structure of the second holding rod and the control assembly in the auxiliary measurement device for controlled blasting construction in large open-pit mines of the present invention;

[0028] Figure 6 It is a schematic diagram of the overall structure of the first holding rod in the auxiliary measurement device for controlled blasting construction in open-pit large-scale mines of the present invention;

[0029] Figure 7 For the present invention Figure 4 Schematic diagram of the local enlarged structure at point A in the middle.

[0030] Marks and corresponding parts names in the attached drawings:

[0031] 1. First holding rod; 2. Second holding rod; 3. Scale; 4. Fastener; 5. Anti-slip pad; 6. Cover plate; 7. Control assembly; 8. Card slot; 9. Handle; 10. Through hole; 11. Lighting assembly; 12. Camera assembly. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0034] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0035] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0037] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0038] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces), unless otherwise clearly and specifically defined.

[0039] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0040] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0041] Please refer to Figures 1 to 7 An auxiliary measuring device for controlled blasting construction in a large open-pit mine provided in an embodiment of the present application comprises a rigid first holding rod 1 and a second holding rod 2, wherein the first holding rod 1 and the second holding rod 2 are telescopically connected, the length of the second holding rod 2 is greater than that of the first holding rod 1, a scale 3 is provided at the top of the first holding rod 1, and the scale 3 is rotatably connected to the first holding rod 1, and a camera assembly 12, a lighting assembly 11 and a control assembly 7 are provided at the bottom of the second holding rod 2, wherein the camera assembly 12 is used to capture a picture of the bottom of a blasthole, the lighting assembly 11 is used to provide lighting during the capture, and the control assembly 7 comprises a signal transmission module and a power supply module, wherein the power supply module is used to supply power to the lighting assembly 11 and the camera assembly 12, and the signal transmission module is used to transmit the captured picture of the bottom of the blasthole to a background terminal.

[0042] In the present application, the first holding rod 1 and the second holding rod 2 are provided. When measuring the blast hole, the first holding rod 1 and the second holding rod 2 are stretched. The first holding rod 1 and the second holding rod 2 are rigid, which can effectively overcome the problem that soft materials are easy to bend. Even when the hole is deep or encounters hard obstacles, they can remain straight, thereby ensuring the accuracy of the measurement and significantly improving the accuracy of the blast hole measurement. With the rigid and retractable first holding rod 1 and the second holding rod 2, the errors caused by bending and deformation of soft materials during measurement are effectively avoided, providing an accurate data basis for blasting construction and ensuring the reliability and safety of the blasting effect.

[0043] In the present application, a rotatable scale 3 is provided to make the measurement of the borehole diameter easier and more efficient. The scale 3 adopts high-precision scale markings and is connected to the first holding rod 1 through a rotating shaft. When measuring the borehole diameter, the scale 3 can be rotated to make it contact with the borehole, and accurate diameter data can be obtained by reading the scale value, thereby reducing the cumbersome steps in the measurement process, saving time and labor costs, and improving the convenience of the measurement operation. Accurate measurement results are helpful to reasonably calculate the blasting amount and optimize the blasting plan, thereby improving the quality and efficiency of the blasting construction and ensuring the quality of the blasting construction.

[0044] In the present application, a camera assembly 12, a lighting assembly 11 and a control assembly 7 are provided inside the bottom end of the second holding rod 2, and a signal transmission module and a power supply module are provided inside the control assembly 7. The power supply module supplies power to the lighting assembly 11 and the camera assembly 12. The camera assembly 12 can shoot the situation at the bottom of the blast hole, and transmit the shot picture to the background terminal through the signal transmission module, so as to facilitate observation of whether debris such as gravel appears at the bottom of the blast hole. At the same time, the power supply module can have a wireless charging function, which is convenient for replenishing power at any time at the construction site to ensure the continuous and stable operation of the lighting assembly 11.

[0045] According to some embodiments of the present application, a through hole 10 is axially provided inside the first holding rod 1, and the second holding rod 2 is slidably sleeved in the through hole 10. Since the length of the second holding rod 2 is greater than that of the first holding rod 1, the first holding rod 1 and the second holding rod 2 can meet the measurement requirements of blastholes of different depths and specifications through telescopic adjustment. At the same time, by controlling the matching clearance between the second holding rod 2 and the through hole 10, during the telescopic process, the first holding rod 1 and the second holding rod 2 maintain good coaxiality and sealing, which can prevent dust and moisture from entering and affecting the telescopic performance.

[0046] According to some embodiments of the present application, a handle 9 is provided at the top of the first holding rod 1, and the second holding rod 2 is slidably installed inside the through hole 10. The provision of the handle 9 can make the overall structure easy to carry.

[0047] According to some embodiments of the present application, the cross section of the through hole 10 is rectangular. By designing the cross section of the through hole 10 to be rectangular, when the second holding rod 2 is extended or retracted, the rectangular through hole 10 can limit the rotational freedom of the second holding rod 2 around the axis direction, so that the second holding rod 2 only maintains the telescopic characteristics.

[0048] According to some embodiments of the present application, a fastener 4 is provided between the first holding rod 1 and the second holding rod 2, and the fastener 4 is used to lock the relative telescopic length of the first holding rod 1 and the second holding rod 2. Preferably, the fastener 4 is a screw, which is provided on the first holding rod 1, and when the screw is screwed in, its front end can press against the second holding rod 2, so that the position of the second holding rod 2 is locked, ensuring that the first holding rod 1 and the second holding rod 2 will not be unexpectedly telescoped due to obstacles in the hole during the measurement process, so as to improve the accuracy and stability of the measurement.

[0049] When measuring a blasthole, the first holding rod 1 and the second holding rod 2 are stretched to a suitable length according to the design depth of the blasthole and the actual situation, and the relative positions of the first holding rod 1 and the second holding rod 2 are locked by fastener 4, and then the device is carefully placed in the blasthole. Due to the rigid structure of the first holding rod 1 and the second holding rod 2, it can remain stable in the blasthole, avoiding measurement errors caused by bending of soft materials.

[0050] According to some embodiments of the present application, a rotation axis is provided at the intersection of the first holding rod 1 and the scale 3, and the scale 3 is rotatable around the rotation axis. When measuring the cross-sectional diameter of a blasthole, the scale 3 is rotated to contact the blasthole, and the scale value on the scale 3 is read to obtain the data of the blasthole diameter. At the same time, the scale 3 is a rotatable structure, which is convenient for storage and protection when not in use, so as to extend the service life of the scale 3.

[0051] The scale 3 in the present application is marked with high-precision scale marks, which are laser-etched, with clear and accurate scales, to meet the high-precision measurement requirements for the borehole diameter. The scale 3 has an all-round rotation angle range, a smooth rotation process without jamming, and an angle locking function, which can fix the scale 3 at the required angle during measurement, thereby improving the convenience and accuracy of measurement. At the same time, the measuring end of the scale 3 is made of wear-resistant hard alloy material, which can prevent wear when in contact with the borehole wall and affect the measurement accuracy.

[0052] According to some embodiments of the present application, a long-lasting luminous material is applied to the scale marks of the scale ruler 3. By applying the long-lasting luminous material to the scale marks, the scale ruler 3 can be clearly read even in an environment with insufficient light.

[0053] According to some embodiments of the present application, a slot 8 is provided at one side of the bottom end of the second holding rod 2, and the control component 7 is arranged in the slot 8. By providing the slot 8 at one side of the bottom end of the second holding rod 2, the control component 7 is embedded in the slot 8, so that the bottom end of the second holding rod 2 can be retracted into the first holding rod 1 without affecting the retraction of the bottom end of the second holding rod 2.

[0054] According to some embodiments of the present application, a cover plate 6 is provided at one side of the bottom end of the second holding rod 2 to close the entrance of the slot 8. By providing the cover plate 6 on the outer wall of the slot 8, the cover plate 6 can protect the control component 7 inside the slot 8. In order not to affect the extension and retraction of the second holding rod 2, the outer wall of the cover plate 6 is flush with the outer wall of the second holding rod 2 after installation.

[0055] According to some embodiments of the present application, the outer surface of the first holding rod 1 is provided with an anti-skid pad 5. Preferably, the anti-skid pad 5 is designed with diamond-shaped protrusions, and the protrusion height and spacing are optimized to increase the stability and comfort of holding. The anti-skid pad 5 is used to improve the anti-skid performance of the first holding rod 1. At the same time, the outer surface can also be covered with a layer of anti-skid rubber sleeve, which has good elasticity and wear resistance, further improving the anti-skid performance.

[0056] According to some embodiments of the present application, the first holding rod 1 and the second holding rod 2 are made of titanium alloy material. By making the first holding rod 1 and the second holding rod 2 of high-strength, corrosion-resistant titanium alloy material, it can be used to ensure long-term stable use in harsh mining environments. The surface is specially hardened and anti-corrosion coated, which can not only withstand the wear and corrosion of the complex environment in the blasthole, but also has excellent impact resistance, ensuring long-term stable use in harsh mining environments.

[0057] According to some embodiments of the present application, the power supply module is powered by a rechargeable lithium battery with a large battery capacity and a long battery life. The battery has a fast charging function and is equipped with an intelligent power management system that can display the remaining power in real time and automatically remind the user to charge when the power is too low. At the same time, the device also has a wireless charging function, which is convenient for replenishing power at any time at the construction site to ensure the continuous and stable operation of the lighting component 11.

[0058] According to some embodiments of the present application, the lighting assembly 11 is composed of a plurality of high-brightness LED lamp beads, which are used to provide sufficient and uniform lighting in a dark bore environment to facilitate measurement operations. The LED lamp beads are arranged at the front end of the first holding rod 1 and are located on both sides of the camera assembly 12. The LED lamp beads have two modes, namely, focusing and diffusing, which can be switched by a switch to adapt to different lighting requirements. They are used to provide sufficient and uniform lighting in a dark bore environment to facilitate measurement operations.

[0059] The specific operation of the measuring device in this application is as follows:

[0060] When measuring the blasthole, since the first holding rod 1 and the second holding rod 2 are retractable structures, the construction personnel can stretch them to a suitable length according to the approximate depth of the blasthole, and fix them with the fastener 4 to make them a long rod with a certain rigidity. When they are inserted into the blasthole, even if they encounter obstacles deeper inside the blasthole or hard objects such as fallen stones, the rigid first holding rod 1 and the second holding rod 2 are not easy to bend. After that, the insertion depth can be recorded and measured, so that the bottom of the blasthole can be accurately measured to obtain accurate depth data.

[0061] In addition, a camera assembly 12, a lighting assembly 11 and a control assembly 7 are provided inside the bottom end of the second holding rod 2, and a signal transmission module and a power supply module are provided inside the control assembly 7. The power supply module supplies power to the lighting assembly 11 and the camera assembly 12. The camera assembly 12 can clearly capture the situation at the bottom of the blast hole, and transmit the captured image to the background terminal through the signal transmission module, so as to facilitate observation of whether debris such as gravel appears at the bottom of the blast hole. At the same time, the power supply module has a wireless charging function, which is convenient for replenishing power at any time at the construction site to ensure the continuous and stable operation of the lighting assembly 11.

[0062] For the measurement of the borehole diameter, the scale 3 connected to the first holding rod 1 is rotated to make it contact with the borehole, and the scale value on the scale 3 is read to obtain the borehole diameter data.

[0063] The entire measurement process is based on the retractability of the first holding rod 1 and the second holding rod 2 and the rotatability of the scale 3, as well as the rigidity of the structure, so as to achieve accurate measurement of the depth and diameter of the blast hole.

[0064] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An auxiliary measurement device for controlled blasting construction in large open-pit mines, characterized in that: It includes a rigid first holding rod and a second holding rod, the first holding rod and the second holding rod are telescopically connected, the length of the second holding rod is greater than that of the first holding rod, the top of the first holding rod is provided with a scale, the scale is rotatably connected to the first holding rod, the bottom of the second holding rod is provided with a camera assembly, a lighting assembly and a control assembly, the camera assembly is used to capture the image of the bottom end of the blast hole, the lighting assembly is used to provide lighting during shooting, the control assembly includes a signal transmission module and a power supply module, the power supply module is used to supply power to the lighting assembly and the camera assembly, and the signal transmission module is used to transmit the captured image of the bottom end of the blast hole to a background terminal.

2. The auxiliary measurement device for controlled blasting construction in open-pit large-scale mines according to claim 1 is characterized in that: A through hole is axially arranged inside the first holding rod, and the second holding rod is slidably sleeved in the through hole.

3. The auxiliary measurement device for controlled blasting construction in open-pit large-scale mines according to claim 2 is characterized in that: The cross section of the through hole is rectangular.

4. The auxiliary measurement device for controlled blasting construction in open-pit large-scale mines according to claim 1 is characterized in that: A fastener is provided between the first holding rod and the second holding rod, and the fastener is used to lock the relative telescopic length of the first holding rod and the second holding rod.

5. The auxiliary measurement device for controlled blasting construction in open-pit large-scale mines according to claim 1 is characterized in that: A rotation axis is provided at the intersection of the first holding rod and the scale, and the scale can rotate around the rotation axis as the axis.

6. The auxiliary measurement device for controlled blasting construction in open-pit large-scale mines according to claim 1 is characterized in that: The scale marks of the scale are coated with long-lasting luminous material.

7. The auxiliary measurement device for controlled blasting construction in open-pit large-scale mines according to claim 1 is characterized in that: A slot is provided on one side of the bottom end of the second holding rod, and the control component is arranged in the slot.

8. The auxiliary measurement device for controlled blasting construction in open-pit large-scale mines according to claim 7, characterized in that: A cover plate is provided on one side of the bottom end of the second holding rod to close the entrance of the card slot.

9. The auxiliary measurement device for controlled blasting construction in open-pit large-scale mines according to claim 1, characterized in that: An anti-slip pad is provided on the outer surface of the first holding rod.

10. The auxiliary measurement device for controlled blasting construction in open-pit large-scale mines according to claim 1, characterized in that: The first holding rod and the second holding rod are made of titanium alloy material.

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