Tunnel rock blast hole depth measuring device and measuring method

Abstract

The invention discloses a tunnel rock blast hole depth measuring device and method, and the device comprises a fixed cylinder which is internally provided with a through hole; the conical plug is arranged on the peripheral surface of the fixed cylinder, and a first depth mark and a diameter mark are arranged on the peripheral surface of the conical plug; the first measuring piece is movably arranged in the through hole of the fixed cylinder, and a second depth mark is arranged on the outer side of the first measuring piece; the female connector is arranged at one end of the first measuring piece; a second depth mark is arranged on the outer side of the second measuring piece; one end of the second measuring piece is provided with the male connector, the female connector is matched with the male connector, and the other end of the second measuring piece is provided with the female connector. According to the design of the sectional measuring rod, the measuring rod can be quickly connected during measurement so as to meet the requirement for measuring the depth of the blast hole, and the measuring rod can be detached after measurement is completed, so that hole inspection personnel can conveniently move from one blast hole to another blast hole.

Description

Technical Field

[0001] This application relates to the technical field of blasting hole depth measurement, and particularly relates to a device and method for measuring the depth of tunnel rock blasting holes. Background Art

[0002] The drilling and blasting method for tunnel rock refers to the method of drilling blasting holes, charging explosives, and blasting to excavate rocks, which is abbreviated as the drill and blast method. The drill and blast method has always been the main construction method for tunnel excavation. This method has strong adaptability to rock stratum geological conditions and low excavation costs, and is especially suitable for the construction of hard rock chambers.

[0003] After drilling is completed, it is necessary to check and record according to the designed blast hole layout diagram. In the existing technology, an integrated depth measurement mechanism composed of a front connecting cylinder, a rear connecting cylinder, a first depth measurement rod, a second depth measurement rod, and a support structure is adopted; it can measure the inner diameter of the blasting hole while measuring the depth of the blasting hole, and can also check whether the middle and the outer peripheral side of the bottom of the blasting hole are flat, solving the problems that the inner diameter size of the blasting hole cannot be measured and whether the middle and the periphery of the bottom of the blasting hole are flat cannot be checked.

[0004] However, the structure of the above integrated depth measurement mechanism is complex, and the number and types of blasting holes are numerous, resulting in a large amount of manpower and material resources being consumed in the process of blasting hole inspection.

[0005] Based on this, it is necessary to propose a device and method for measuring the depth of tunnel rock blasting holes to reduce the manpower and material resources required for blasting hole inspection, which has become an important technical problem to be solved urgently. Summary of the Invention

[0006] This application provides a device and method for measuring the depth of tunnel rock blasting holes, aiming to solve the problem that the structure of the integrated depth measurement mechanism in the existing technology is complex, and the number and types of blasting holes are numerous, resulting in a large amount of manpower and material resources being consumed in the process of blasting hole inspection.

[0007] To achieve the above object, this application proposes a device for measuring the depth of tunnel rock blasting holes, including: a fixed cylinder, a through hole is arranged in the fixed cylinder; a tapered plug, the tapered plug is arranged on the outer peripheral surface of the fixed cylinder, and a first depth mark and a diameter mark are arranged on the outer peripheral surface of the tapered plug; a first measuring member, the first measuring member is movably arranged in the through hole of the fixed cylinder, and a second depth mark is arranged on the outer side of the first measuring member; a female connector, the female connector is arranged at one end of the first measuring member; a second measuring member, a second depth mark is arranged on the outer side of the second measuring member; a male connector, a male connector is arranged at one end of the second measuring member, the female connector is adapted to the male connector, and a female connector is arranged at the other end of the second measuring member.

[0008] In some embodiments, the male connector includes: a stud, which is disposed on the first measuring member or the second measuring member; an enlarged head, which is disposed at one end of the stud away from the first measuring member or the second measuring member; and a first abutting surface, where the first abutting surface is disposed on the side of the enlarged head facing the stud.

[0009] In some embodiments, the female connector includes: an inner nut, which is screwed onto the first measuring member or the second measuring member; elastic pieces, which are circumferentially and spacedly disposed on the inner nut; and a second abutting surface, where the second abutting surface is disposed at one end of the elastic piece away from the inner nut.

[0010] In some embodiments, the angle between the first abutting surface and the horizontal plane is greater than 30° and less than 55°, and both the first abutting surface and the second abutting surface are rough surfaces.

[0011] In some embodiments, it further includes: a first limiting portion, where the first limiting portion is disposed in both the first measuring member and the second measuring member, and the first limiting portion is used to limit the screwing-in depth of the inner nut; and a screwing groove, which is disposed at the top end of the inner nut.

[0012] In some embodiments, it further includes: an internal thread section, where the internal thread section is disposed on the inner side of the inner nut; and a limiting handle, which is screwed onto the internal thread section.

[0013] In some embodiments, it further includes: a second limiting portion, where the second limiting portion is disposed on the fixed cylinder, and the tapered plug abuts against the second limiting portion; and a column cylinder, which is screwed onto the outer peripheral surface of the fixed cylinder.

[0014] In some embodiments, it further includes: sliding strips, where the sliding strips are spacedly disposed on the outer peripheral surfaces of both the first measuring member and the second measuring member; and a sliding groove, where the sliding groove adapted to the sliding strips is disposed in the fixed cylinder.

[0015] In some embodiments, it further includes: a force sensor, where the force sensor is disposed at the other end of the first measuring member.

[0016] Based on another object of the present invention, the present invention provides the following technical solution: a method for measuring the depth of a tunnel rock blasting hole, where the measuring method uses the measuring device as described above, and the measuring method includes the following steps: S1. Insert the blowing pipe into the blasting hole, and use high-pressure air to blow out the sundries in the blasting hole; S2. Fix the fixed cylinder to the orifice of the blasting hole through the tapered plug; S3. Read the first depth mark and the diameter mark to obtain the distance between the orifice and the top end of the fixed cylinder and the diameter of the blasting hole; S4. Insert the first measuring member and the second measuring member into the blasting hole in sequence until they cannot be inserted further; S5. Read the second depth mark, and obtain the depth of the blasting hole according to the distance between the orifice and the top end of the fixed cylinder.

[0017] The technical solution of this application proposes a device for measuring the depth of tunnel rock blasting holes, including: a fixed cylinder with a through hole provided therein; a tapered plug disposed on the outer peripheral surface of the fixed cylinder, and a first depth mark and a diameter mark are provided on the outer peripheral surface of the tapered plug; a first measuring member movably disposed in the through hole of the fixed cylinder, and a second depth mark is provided on the outer side of the first measuring member; a female connector disposed at one end of the first measuring member; a second measuring member, and a second depth mark is provided on the outer side of the second measuring member; a male connector is disposed at one end of the second measuring member, the female connector is adapted to the male connector, and a female connector is disposed at the other end of the second measuring member. During the process of checking the holes after the drilling of the blasting holes is completed, the tapered plug is inserted into the blasting hole. Through the extrusion between the fixed cylinder and the orifice of the blasting hole, the tapered plug and the fixed cylinder are installed on the orifice of the blasting hole, and the coaxiality of the fixed cylinder and the blasting hole is ensured. The aperture of the blasting hole is read through the diameter mark on the tapered plug. The first measuring member and multiple second measuring members are connected to form a measuring rod, and the measuring rod is inserted into the blasting hole through the fixed cylinder until the measuring rod contacts the bottom of the blasting hole and cannot continue to extend. At this time, the hole depth can be obtained through the second depth mark and the first depth mark. The segmented design of the measuring rod can be quickly connected during measurement to meet the requirement of measuring the depth of the blasting hole. After the measurement is completed, it can be disassembled into sections of the first measuring member or the second measuring member, which is convenient for the hole-checking personnel to move from one blasting hole to another. The hole-checking steps are relatively simple and do not require the assistance of engineering power machinery to check the holes. A single person can complete the hole-checking work of the blasting hole, which is beneficial to reducing the human and material resources required for hole-checking. And it is also beneficial to the synchronous construction of multiple people and improves the construction efficiency. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where: Figure 1 is a three-dimensional structural diagram of the first measuring member and the fixed cylinder in an embodiment of the present application; Figure 2 is a three-dimensional structural diagram of the first measuring member and the fixed cylinder after removing the limit handle in an embodiment of the present application; Figure 3 is Figure 2 a partial enlarged view of part A in Figure 4 is a cross-sectional view of the first measuring member and the fixed cylinder in an embodiment of the present application; Figure 5 is Figure 4Partial enlarged view of part B; Figure 6 Schematic three - dimensional structure diagram of the first measuring piece, the second measuring piece and the fixing cylinder in an embodiment of the present application; Figure 7 Cross - sectional view of the first measuring piece, the second measuring piece and the fixing cylinder in an embodiment of the present application; Figure 8 For Figure 7 Partial enlarged view of part C;

[0019] In the figure: the first measuring piece 1, the column cylinder 2, the tapered plug 3, the second limiting part 4, the sliding strip 5, the limiting handle 6, the force sensor 7, the fixing cylinder 8, the second measuring piece 9, the inserting column 10, the elastic piece 11, the second abutting surface 12, the enlarged head 13, the first abutting surface 14, the first limiting part 15, the inner nut 16, the screwing groove 17. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope protected by the present application.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, the directional indications will also change accordingly.

[0022] It should also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0023] In addition, the descriptions involving "first", "second", etc. in the present application are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0024] Embodiment 1 Refer to Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown, the present application proposes a device for measuring the depth of tunnel rock blasting holes, including: a fixed cylinder 8 with a through hole provided therein; a tapered plug 3 disposed on the outer peripheral surface of the fixed cylinder 8, and a first depth mark and a diameter mark are provided on the outer peripheral surface of the tapered plug 3; a first measuring member 1 movably disposed in the through hole of the fixed cylinder 8, and a second depth mark is provided on the outer side of the first measuring member 1; a female connector disposed at one end of the first measuring member 1; a second measuring member 9 with a second depth mark provided on the outer side thereof; a male connector, a male connector is provided at one end of the second measuring member 9, the female connector is adapted to the male connector, and a female connector is provided at the other end of the second measuring member 9.

[0025] Among them, the combined structure formed by the fixed cylinder 8 and the tapered plug 3 serves the functions of fixing and diameter measurement. The tapered plug 3 is inserted into the blasting hole, and through the extrusion between the fixed cylinder 8 and the hole opening of the blasting hole, the tapered plug 3 and the fixed cylinder 8 are installed on the hole opening of the blasting hole, and the coaxiality between the fixed cylinder 8 and the blasting hole is ensured. After the tapered plug 3 and the fixed cylinder 8 are installed on the hole opening of the blasting hole, the aperture of the blasting hole can be read through the diameter mark on the tapered plug 3, and the distance between the hole opening of the blasting hole and the top end of the fixed cylinder 8 can be read through the first depth mark on the tapered plug 3.

[0026] Among them, the first measuring member 1 is connected to the male connector of the second measuring member 9 through the female connector thereon, thereby forming a measuring rod. Since a male connector is provided at one end of the second measuring member 9 and a female connector is provided at the other end, it is possible to further compound and connect the second measuring member 9 to the second measuring member 9 to adapt to the depths of different types of blasting holes. The segmented measuring rod design allows for quick connection during measurement to meet the requirement of measuring the depth of the blasting hole. After the measurement is completed, it can be disassembled into segments of the first measuring member 1 or the second measuring member 9, facilitating the inspection personnel to move from one blasting hole to another blasting hole and detect the other blasting hole; the second depth marks on the first measuring member 1 and the second depth marks on the second measuring member 9 are continuous depth marks. Due to the limitation of the fixed cylinder 8, only the distance from the top end of the fixed cylinder 8 to the bottom of the blasting hole can be read. Subtracting the distance between the hole opening of the blasting hole and the top end of the fixed cylinder 8 from the above distance can obtain the hole depth.

[0027] In this embodiment, the lengths of the first measuring piece 1 and the second measuring piece 9 are both preferably 50 cm, which is convenient for the hole inspection personnel to carry and transport. Moreover, when measuring the hole depth, the total number of the first measuring piece 1 and the second measuring piece 9 does not exceed 10, so that the disassembly and assembly steps of the first measuring piece 1 and the second measuring piece 9 will not be too complicated. And it is beneficial for the hole inspection personnel to complete the hole inspection work of the blasting holes alone, which is conducive to multi-person synchronous construction and improves the construction efficiency.

[0028] Specifically, during the process of hole inspection after the drilling of the blasting hole is completed, the taper plug 3 is inserted into the blasting hole. Through the extrusion between the fixed cylinder 8 and the orifice of the blasting hole, the taper plug 3 and the fixed cylinder 8 are installed on the orifice of the blasting hole, and the coaxiality of the fixed cylinder 8 and the blasting hole is ensured. The aperture of the blasting hole is read out through the diameter mark on the taper plug 3. The first measuring piece 1 and multiple second measuring pieces 9 are connected to form a measuring rod, and the measuring rod is inserted into the blasting hole through the fixed cylinder 8 until the measuring rod contacts the bottom of the blasting hole and cannot be inserted further. At this time, the hole depth can be obtained through the second depth mark and the first depth mark. The segmented design of the measuring rod can be quickly connected during measurement to meet the requirement of measuring the depth of the blasting hole. After the measurement is completed, it can be disassembled into sections of the first measuring piece 1 or the second measuring piece 9, which is convenient for the hole inspection personnel to move from one blasting hole to another. The hole inspection steps are relatively simple and do not require the assistance of engineering power machinery to assist in hole inspection. One person can complete the hole inspection work of the blasting hole, which is beneficial to reducing the human and material resources required for hole inspection. And it is also conducive to multi-person synchronous construction and improves the construction efficiency.

[0029] Specifically speaking, the blasting holes include cut holes, relieving holes, tunneling holes, inner ring auxiliary holes, floor holes and perimeter holes. There are differences in the hole depth and aperture of different types of holes. During the actual drilling process, it is also necessary to adjust the hole depth according to the position of the hole mouth and the unevenness of the rock on the heading face to ensure that the bottoms of the blast holes are on the same plane. For blasting holes with different depths, measuring rods with different depths can be assembled correspondingly. And when the measuring rod is relatively long (exceeding 3 m), the measuring rod can be selected to be disassembled and transported to the next blasting hole position for assembly, reducing the human and material resources required for hole inspection.

[0030] Refer to Figure 7 and Figure 8As shown, in some embodiments, the male connector includes: a stud 10 disposed on the first measuring member 1 or the second measuring member 9; the stud 10 includes a connecting section, a second section, and a third section, where the connecting section is used to connect to the first measuring member 1 or the second measuring member 9, the outer diameter of the second section is equal to the inner diameter of the inner nut 16, and the outer diameter of the third section is smaller than the outer diameter of the second section; an enlarged head 13 disposed at one end of the stud 10 away from the first measuring member 1 or the second measuring member 9; the enlarged head 13 is disposed on the third section, and an arc-shaped guiding portion is provided on the enlarged head 13 to facilitate the insertion of the male connector into the inner nut 16; a first abutting surface 14, and a first abutting surface 14 is provided on the side of the enlarged head 13 facing the stud 10. A first abutting surface 14 is formed between the third section and the enlarged head 13. The female connector includes: an inner nut 16 screwed to the first measuring member 1 or the second measuring member 9; the upper end surface of the inner nut 16 is flush with the upper end surface of the first measuring member 1 or the second measuring member 9; elastic pieces 11 are circumferentially spaced apart on the inner nut 16; there are multiple elastic pieces 11, and there is a gap between adjacent two elastic pieces 11. The material of the elastic pieces 11 is preferably spring steel. A second abutting surface 12 is provided at one end of the elastic piece 11 away from the inner nut 16. During the insertion of the male connector, the enlarged head 13 forces the elastic piece 11 to deform radially outward. As the male connector is inserted, the elastic piece 11 rebounds under the action of its own elastic force. After rebounding, the second abutting surface 12 on the elastic piece 11 abuts against the first abutting surface 14, thereby realizing the connection between the male connector and the female connector.

[0031] In this embodiment, by inserting the male connector into the female connector, the connection between the male connector and the female connector can be realized, thereby realizing the connection between the first measuring member 1 and the second measuring member 9, or realizing the connection between the second measuring member 9 and the second measuring member 9. The connection operation is simple and convenient for reducing the manpower required for hole inspection.

[0032] Refer to Figure 7 and Figure 8 As shown, in some embodiments, the angle between the first abutting surface 14 and the horizontal plane is greater than 30° and less than 55°. Both the second abutting surface 12 and the first abutting surface 14 are flat surfaces, and the second abutting surface 12 is parallel to the first abutting surface 14. By the inclined first abutting surface 14 and the second abutting surface 12, when disassembling the measuring rod, the male connector and the female connector are more likely to be separated under brute force pulling. The first abutting surface 14 and the second abutting surface 12 are rough surfaces. The rough surfaces are used to enhance the friction between the two to prevent the male connector from disengaging from the female connector during the hole inspection process, resulting in the disconnection of the measuring rod.

[0033] In this embodiment, the angle between the first abutting surface 14 and the horizontal plane is greater than 35° and less than 45°. More preferably, the angle between the first abutting surface 14 and the horizontal plane is equal to 35°. At this angle, it is less difficult to pull out the male connector from the female connector, and during the process of checking the hole, the male connector is not likely to come out of the female connector either.

[0034] Refer to Figure 1 、 Figure 2 and Figure 3 As shown, in some embodiments, it further includes: a first limiting portion 15. The first limiting portion 15 is provided in both the first measuring member 1 and the second measuring member 9. The first limiting portion 15 is used to limit the screwing-in depth of the inner nut 16. The first limiting portion 15 is a unique annular protrusion, which is used to prevent the inner nut 16 from screwing in further when the inner nut 16 abuts against it. Through the structural design of the first limiting portion 15, the screwing-in depth of the inner nut 16 can be effectively limited, avoiding excessive screwing-in of the inner nut 16. A screwing groove 17 is provided at the top end of the inner nut 16. During the process of screwing the inner nut 16, by inserting a relevant tool into the screwing groove 17, the inner nut 16 can be screwed by the relevant tool until the upper end surface of the inner nut 16 is flush with the end surface of the first measuring member 1 or the second measuring member 9.

[0035] Refer to Figure 1 、 Figure 6 and Figure 7 As shown, in some embodiments, it further includes: an internal thread section. The internal thread section is provided on the inner side of the inner nut 16. The internal thread section abuts against the second section of the plug post 10. A limiting handle 6 is screwed to the internal thread section. The limiting handle 6 is screwed to the internal thread section. During the detection process, the limiting handle 6 facilitates pulling out the measuring rod and prevents the measuring rod from completely falling into the blasting hole. During the process of connecting the male connector and the female connector, the limiting handle 6 needs to be unscrewed.

[0036] Refer to Figure 1 、 Figure 2 and Figure 4 As shown, in some embodiments, it further includes: a second limiting portion 4. The second limiting portion 4 is provided on the fixed cylinder 8. The conical plug 3 abuts against the second limiting portion 4. The second limiting portion 4 is used to limit the position of the conical plug 3. The conical plug 3 is compounded to the outer peripheral surface of the fixed cylinder 8 by bonding or welding. During the bonding or welding process, the second limiting portion 4 can better limit the position of the conical plug 3. A cylinder 2 is screwed to the fixed cylinder 8. The cylinder 2 is selected according to the aperture of the blasting hole. Cylinders 2 adapted to different aperture blasting holes are provided to maintain the coaxiality between the fixed cylinder 8 and the blasting hole.

[0037] Refer to Figure 1 、 Figure 2 and Figure 6As shown, in some embodiments, it further includes: a slide bar 5, and the outer peripheral surfaces of the first measuring member 1 and the second measuring member 9 are both provided with the slide bar 5 at intervals; a chute, and a chute adapted to the slide bar 5 is provided in the fixed cylinder 8. Through the cooperation of the slide bar 5 and the chute, the moving stability of the first measuring member 1 and the second measuring member 9 is improved. Preferably, 4 slide bars 5 are provided, and the included angle between two adjacent slide bars 5 is 90°, and 4 chutes are correspondingly provided.

[0038] In this embodiment, a rotation-limiting protrusion is further provided on the connecting section of the insertion post 10 for inserting into the screwing groove 17 on the inner nut 16. Through the cooperation of the rotation-limiting protrusion and the screwing groove 17, relative rotation between the first measuring member 1 and the second measuring member 9 is avoided, or relative rotation between the second measuring member 9 and the second measuring member 9 is avoided, ensuring that the slide bars 5 of the first measuring member 1 and the second measuring member 9 are opposite.

[0039] In some embodiments, it further includes: a force sensor 7, and the force sensor 7 is provided at the other end of the first measuring member 1. During the hole inspection process, there is a gap between the first measuring member 1 and the second measuring member 9 or between the second measuring member 9 and the second measuring member 9, and the gap needs to be eliminated by pressing the measuring rod. The force sensor 7 is used to limit the magnitude of the pressing force, and the data displayed by the second depth identifier can be read only when the magnitude of the pressing force exceeds a preset value.

[0040] Embodiment Two In this embodiment, the same parts as those in Embodiment One are given the same reference numerals and the same text descriptions are omitted.

[0041] This embodiment discloses a method for measuring the depth of a tunnel rock blasting hole. The measuring method uses the measuring device in Embodiment One. The measuring method includes the following steps: S1. Insert the blowpipe into the blasting hole and blow out the sundries in the blasting hole by using high-pressure air; S2. Fix the fixed cylinder 8 to the orifice of the blasting hole through the tapered plug 3; S3. Read the first depth identifier and the diameter identifier to obtain the distance between the orifice and the top end of the fixed cylinder 8 and the diameter of the blasting hole; S4. Insert the first measuring member 1 and the second measuring member 9 into the blasting hole in sequence until they can no longer be inserted; S5. Read the second depth identifier, and obtain the depth of the blasting hole according to the distance between the orifice and the top end of the fixed cylinder 8. The depth of the blasting hole can be obtained by subtracting the distance between the orifice and the top end of the fixed cylinder 8 from the data displayed by the second depth identifier.

[0042] The above are only partial or preferred embodiments of the present application. Whether in terms of text or drawings, the scope of protection of the present application cannot be limited thereby. Any equivalent structural transformation made by using the content of the specification and drawings of the present application under the overall concept of the present application, or any direct / indirect application in other related technical fields is included in the scope of protection of the present application.

Claims

1. A device for measuring the depth of tunnel rock blasting holes, characterized in that, Comprising: A fixed cylinder (8) having a through hole provided therein; A tapered plug (3) provided on the outer peripheral surface of the fixed cylinder (8), the outer peripheral surface of the tapered plug (3) being provided with a first depth mark and a diameter mark; A first measuring member (1) movably provided in the through hole of the fixed cylinder (8), the outer side of the first measuring member (1) being provided with a second depth mark; A female connector provided at one end of the first measuring member (1); A second measuring member (9), the outer side of the second measuring member (9) being provided with a second depth mark; A male connector, one end of the second measuring member (9) being provided with a male connector, the female connector being adapted to the male connector, and the other end of the second measuring member (9) being provided with a female connector.

2. The tunnel rock blasting hole depth measuring device according to claim 1, characterized in that, The male connector includes: A plug post (10) provided on the first measuring member (1) or the second measuring member (9); An enlarged head (13) provided at the end of the plug post (10) away from the first measuring member (1) or the second measuring member (9); A first abutting surface (14) provided on the side of the enlarged head (13) facing the plug post (10).

3. The tunnel rock blasting hole depth measuring device according to claim 2, wherein The female connector includes: An inner nut (16) screwed onto the first measuring member (1) or the second measuring member (9); Elastic pieces (11) circumferentially spaced apart on the inner nut (16); A second abutting surface (12) provided at the end of the elastic piece (11) away from the inner nut (16).

4. The tunnel rock blasting hole depth measuring device according to claim 3, characterized in that, The angle between the first abutting surface (14) and the horizontal plane is greater than 30° and less than 55°, and the first abutting surface (14) and the second abutting surface (12) are rough surfaces.

5. The tunnel rock blasting hole depth measuring device according to claim 3, characterized in that Further comprising: A first limiting portion (15) provided in both the first measuring member (1) and the second measuring member (9), the first limiting portion (15) being used to limit the screwing depth of the inner nut (16); A screwing groove (17) provided at the top end of the inner nut (16).

6. The tunnel rock blasting hole depth measuring device according to claim 3, characterized in that, Further comprising: An internal thread section provided inside the inner nut (16); A limiting handle (6) screwed onto the internal thread section.

7. A tunnel rock blasting hole depth measuring device according to claim 1, characterized in that, Further comprising: A second limiting portion (4) provided on the fixed cylinder (8), the tapered plug (3) abutting against the second limiting portion (4); A column cylinder (2) screwed onto the outer peripheral surface of the fixed cylinder (8).

8. The tunnel rock blasting hole depth measuring device according to claim 1, characterized in that, Further comprising: Sliding strips (5) spaced apart on the outer peripheral surfaces of the first measuring member (1) and the second measuring member (9); A sliding groove provided in the fixed cylinder (8) adapted to the sliding strips (5).

9. The tunnel rock blasting hole depth measuring device according to claim 1, characterized in that, Further comprising: A force sensor (7) provided at the other end of the first measuring member (1).

10. A method for measuring the depth of a tunnel rock blasting hole, wherein the measuring method uses the measuring device according to any one of claims 1-9, characterized in that, The measuring method includes the following steps: S1. Insert the blowpipe into the blasting hole and use high-pressure air to blow out the sundries in the blasting hole; S2. Fix the fixing cylinder to the orifice of the blasting hole through the taper plug; S3. Read the first depth mark and the diameter mark to obtain the distance between the orifice and the top of the fixing cylinder and the diameter of the blasting hole; S4. Insert the first measuring piece and the second measuring piece into the blasting hole in sequence until they can no longer be inserted; S5. Read the second depth mark and obtain the depth of the blasting hole according to the distance between the orifice and the top of the fixing cylinder.

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