Hole forming method for shaped charge blasting

Abstract

The hole forming method comprises the steps that S1, a first drill rod and a drill bit are arranged, the drill bit is arranged at the upper end of the first drill rod, and the drill bit is used for slotting the inner wall face of a drilled hole; s2, the lower end of the first drill rod is connected with a second drill rod, and the extending direction of the second drill rod is consistent with the extending direction of the first drill rod; and S3, the second drill rod, the first drill rod and the drill bit are connected into a whole and move towards the drill hole. According to the hole forming method for shaped charge blasting, the slotting direction can be controlled during drilling, the engineering quality is guaranteed, and the cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of concentrated charge blasting, and in particular to a hole forming method for concentrated charge blasting. Background Art

[0002] The purpose of focused blasting is to release blasting energy in a directional manner. The explosives are placed in a focused tube, and the structure of the tube guides the blasting energy to be released in a fixed direction. The existing pre-splitting blasting is to place the explosives in the focused tube after drilling is completed, and use the focused effect of the focused tube during blasting to achieve the purpose of forming a slit.

[0003] However, in the related art, two adjacent energy-gathering tubes need to be connected by connectors, and even need to be fixed with tape, which is a cumbersome process and wastes work time. In addition, high-pressure water jets are often used when cutting the drill holes, which has high construction costs. High-pressure water can cause the cutting seams to be too large for soft roof plates, and can also cause deformation and delamination of roof plates with strong water absorption. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to some extent. To this end, an embodiment of the present invention provides a hole-making method for concentrated blasting, by using the method to cut a slit in a borehole, the use of concentrated tubes is saved, and the cost is saved.

[0005] The hole forming method for concentrated energy blasting according to the embodiment of the present invention comprises:

[0006] S1. A first drill rod and a drill bit are provided, wherein the drill bit is provided at the upper end of the first drill rod, and the drill bit is used to cut a slit on the inner wall surface of the borehole;

[0007] S2. A second drill rod is connected to the lower end of the first drill rod, wherein the extension direction of the second drill rod is consistent with the extension direction of the first drill rod;

[0008] S3. The second drill rod, the first drill rod and the drill bit are connected as a whole and move toward the drill hole.

[0009] In the hole-making method for energy-gathering blasting of the embodiment of the present invention, the drill bit cuts slits on the inner wall surface of the drill hole. Compared with the prior art, the drill hole is constructed into an "energy-gathering tube". The drill bit cuts slits on the inner wall surface of the drill hole, which saves the use of energy-gathering tubes, ensures the quality of the project, and saves costs. Moreover, the amount of explosives is increased without changing the hole diameter, the blasting power is increased, the spacing between adjacent holes can be increased, the drilling construction amount is reduced, and the construction cost and construction time are saved.

[0010] In some embodiments, before S3 and after S2, the hole forming method for concentrated energy blasting further includes:

[0011] S21. Connect a third drill rod to the lower end of the second drill rod.

[0012] In some embodiments, before S3 and after S21, the hole forming method for concentrated energy blasting further includes:

[0013] S22. Repeat S21;

[0014] S23. Move the drill bit so that the drill bit is located at a set position on the inner wall surface of the tunnel.

[0015] In some embodiments, the drill bit has an air outlet, and the third drill rod, the second drill rod, the first drill rod and the air outlet are connected. Before S3 and after S23,

[0016] The hole forming method for concentrated energy blasting also includes:

[0017] S24. Introducing nitrogen into the borehole through the gas outlet.

[0018] In some embodiments, step S3 is performed using a drilling device, wherein the drilling device includes a pneumatic hammer, wherein the pneumatic hammer is disposed below the third drill rod, and the pneumatic hammer is used to push the third drill rod to move toward the drill hole;

[0019] S3. Use a pneumatic hammer to push the third drill rod to move so that the drill bit can extend into the drill hole and cut a slit on the inner wall surface of the drill hole.

[0020] In some embodiments, after S3, the hole forming method for concentrated energy blasting further includes:

[0021] S4. A fourth drill rod is connected to the lower end of the third drill rod, and the pneumatic hammer moves the drill head toward the drill hole by pushing the fourth drill rod.

[0022] In some embodiments, the hole forming method for concentrated energy blasting further comprises:

[0023] S5. Repeat S24-S4.

[0024] In some embodiments, the drilling device also includes a guide member, a limit member, a clamping member and a control member. The limit member is arranged at the upper end of the guide member. The limit member has a limit hole. The limit hole extends along the extension direction of the guide member. A drill rod can be passed through the limit hole. The clamping member is slidably installed on the guide member and is located below the limit member. The clamping member is used to clamp the drill rod. The control member is slidably installed on the guide member and is located below the clamping member. The control member can move the drill rod along the axial direction of the guide member so that the drill rod can pass through the limit hole.

[0025] In some embodiments, the S1 includes: the first drill rod is inserted into the limiting hole, and the clamping member clamps the lower end of the first drill rod;

[0026] The S2 includes: the control member moves toward the limiting member to drive the first drill rod to move toward the inner wall surface of the tunnel, the first drill rod drives the clamping member to move toward the inner wall surface of the tunnel, when the lower end of the first drill rod is located in the limiting hole, the control member returns to its original position, the clamping member releases the first drill rod and returns to its original position, and then the second drill rod is installed in the clamping member, the control member moves toward the limiting member to drive the second drill rod to move toward the inner wall surface of the tunnel, so that the upper end of the second drill rod can be connected to the lower end of the first drill rod.

[0027] In some embodiments, the hole-forming method for concentrated energy blasting further includes a direction-adjusting member connected to the drilling device, and the direction-adjusting member is used to adjust the rotation of the drilling device relative to the inner wall surface of the tunnel so that the extension direction of the guide member is consistent with the extension direction of the drill hole;

[0028] The step S23 includes: firstly moving the drilling device to a set position, and then adjusting the drilling device using the direction adjusting member so that the drill bit is aligned with the set position on the inner wall surface of the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the installation of the rotating parts of the equipment for hole-forming by concentrated energy blasting according to an embodiment of the present invention.

[0030] Figure 2 It is a schematic diagram of the operation of a pneumatic hammer of a device for hole-forming by energy-focused blasting according to an embodiment of the present invention.

[0031] Figure 3 It is a schematic diagram of the back side of the device for forming a hole by concentrated energy blasting according to an embodiment of the present invention.

[0032] Figure 4 It is a schematic diagram of a drill bit of a device for drilling by concentrated energy blasting according to an embodiment of the present invention.

[0033] Figure 5 It is a schematic diagram of a rotating part of a device for forming a hole by concentrated energy blasting according to an embodiment of the present invention.

[0034] 1. Equipment platform; 2. Drilling device; 21. Direction adjustment member; 22. Connecting plate; 23. Guide member; 24. Limit member; 241. Limit hole; 25. Clamping member; 251. Clamping hole; 26. Control member; 27. Pneumatic hammer; 28. Vertical pole; 29. ​​Rotating member; 3. Walking device; 4. Support device; 41. Vertical pole; 42. Support cap; 43. Plug-in; 51. Nitrogen generation system; 52. Hydraulic system; 53. Control system; 61. Drill bit; 611. Drill bit body; 612. Guide part; 613. Cutting part; 614. Air outlet; 62. First drill rod; 63. Second drill rod. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0036] like Figure 1-5 As shown, the device for forming holes by concentrated energy blasting according to an embodiment of the present invention comprises an equipment platform 1, a drilling device 2, a walking device 3 and a supporting device 4. The drilling device 2 is arranged on the top surface of the equipment platform 1. The walking device 3 is arranged on the bottom surface of the equipment platform 1, and the walking device 3 can move in the tunnel to drive the equipment platform 1 to move in the tunnel. The supporting device 4 comprises a column 41, and there are four columns 41. The four columns 41 are respectively arranged at the four corners of the equipment platform 1, and the columns 41 extend in the up-down direction, and the lower end of the column 41 is supported on the bottom surface of the tunnel, and the upper end of the column 41 is supported on the top surface of the tunnel.

[0037] Specifically, the column 41 can be extended and retracted in the vertical direction to adapt to lanes of different heights and improve applicability. A support cap 42 is provided at the upper end of the column 41, and the cross-sectional area of ​​the support cap 42 is larger than the cross-sectional area of ​​the column 41 to increase the contact area between the column 41 and the top surface of the lane. A plug-in 43 is provided on the side of the support cap 42 close to the lane, and the plug-in 43 can be inserted into the top surface of the lane to improve the support of the column 41 on the top surface of the lane.

[0038] Specifically, the drilling device 2 includes an adjusting member 21 and a connecting plate 22, at least part of the adjusting member 21 can rotate in the YZ plane, and the connecting plate 22 is connected to at least part of the adjusting member 21 so that the connecting plate 22 can rotate around a first direction in the YZ plane, and the first direction is orthogonal to the YZ plane.

[0039] The drilling device 2 further includes a guide member 23, a stopper 24, a clamping member 25, a control member 26 and a pneumatic hammer 27. The guide member 23 is arranged on the connecting plate 22 and extends along the extension direction of the connecting plate 22. The stopper 24 is arranged at the upper end of the guide member 23, and has a stopper hole 241 on the stopper 24, which penetrates the stopper 24 along the direction of the guide member 23, and the stopper hole 241 is suitable for inserting a drill rod. The clamping member 25 is arranged at the lower end of the guide member 23 and can slide on the guide member 23, and has a clamping hole 251 on the clamping member 25, which penetrates the clamping member 25 along the direction of the guide member 23, and the clamping hole 251 is suitable for inserting a drill rod, and the drill rod can rotate relative to the clamping member 25 in the clamping hole 251.

[0040] The two sides of the connecting plate 22 are also provided with vertical rods 28, which extend along the length direction of the connecting plate 22, and the control member 26 is slidably mounted on the vertical rods 28. A rotating member 29 is detachably mounted on the top surface of the control member 26, and the lower end of the drill rod is engaged with the rotating member 29. The control member 26 controls the rotating member 29 to rotate, so that the drill rod inserted in the clamping hole 251 rotates.

[0041] The pneumatic hammer 27 is arranged in the control member 26. When the rotating member 29 is removed from the control member 26, the upper end of the piston of the pneumatic hammer 27 can extend from the top surface of the control member 26 to push the drill rod to move along the extension direction of the guide member 23.

[0042] The device for hole forming by concentrated energy blasting according to the embodiment of the present invention further comprises a nitrogen production system 51, a hydraulic system 52 and a control system 53, and each system is connected to a required device through a hydraulic pipeline.

[0043] The hole forming method for concentrated energy blasting according to the embodiment of the present invention comprises:

[0044] S1. A first drill rod 62 and a drill bit 61 are provided. The drill bit 61 is provided at the upper end of the first drill rod 62. The drill bit 61 is used to cut a slit on the inner wall surface of the drill hole.

[0045] Specifically, the inner circumference of the lower end of the drill bit 61 has an internal thread, and the outer circumference of the upper end of the first drill rod 62 has an external thread, and the first drill rod 62 and the drill bit 61 are threadedly matched. During installation, the drill bit 61 is clamped in the limiting hole 241, and the first drill rod 62 is arranged in the clamping hole 251. The control member 26 moves along the axial direction of the vertical rod 28 to push the first drill rod 62 to move toward the drill bit 61, and the clamping member 25 also moves with the first drill rod 62. The control member 26 controls the rotating member 29 to rotate so that one end of the first drill rod 62 is threadedly matched with the drill bit 61.

[0046] Specifically, after the first drill rod 62 and the drill bit 61 are connected, the limit member 24 releases the clamping of the drill bit 61, and the control member 26 continues to push the first drill rod 62 toward the limit member 24 until the lower end of the first drill rod 62 is located in the limit hole 241 and is clamped by the limit member 24. Then, the clamping member 25 releases the first drill rod 62, and the clamping member 25 and the control member 26 return to their original positions.

[0047] S2. Connect the second drill rod 63 to the lower end of the first drill rod 62 away from the drill bit 61 , and the extension direction of the second drill rod 63 is consistent with the extension direction of the first drill rod 62 .

[0048] Specifically, the inner wall surface of the lower end of the first drill rod 62 has an internal thread, and the outer peripheral surface of the upper end of the second drill rod 63 has an external thread. During installation, the lower end of the first drill rod 62 is clamped in the limiting hole 241, and the second drill rod 63 is inserted into the clamping hole 251. The control member 26 moves along the axial direction of the vertical rod 28 to push the second drill rod 63 toward the first drill rod 62. When the upper end of the second drill rod 63 contacts the lower end of the first drill rod 62, the control member 26 controls the rotating member 29 to rotate so that the upper end of the second drill rod 63 is threadedly connected to the lower end of the first drill rod 62. The connection method is simple, firm, and efficient. Moreover, the connection of the second drill rod 63 pushes the first drill rod 62 and the drill head 61 toward the wall of the tunnel, so that the drill head 61 is close to the wall of the tunnel.

[0049] S3, the second drill rod 63, the first drill rod 62 and the drill head 61 are connected as a whole and move toward the borehole to cut the inner wall surface of the borehole. Specifically, during the cutting process, the drill rod as a whole can be rotated around the central axis of the clamping hole 251 by the rotating member 29 to drive the drill head 61 to rotate, so that the cutting portion 613 is consistent with the pre-splitting direction of the borehole, thereby improving the cutting effect.

[0050] Specifically, the pneumatic hammer 27 is used to push the drill rod as a whole to move toward the drill hole. When the pneumatic hammer 27 is used, the rotating member 29 on the control member 26 is removed. When the clamping member 25 is in the original position, the clamping member 25 and the pneumatic hammer 27 are arranged at intervals, and the clamping member 25 is about 10 cm away from the piston rod of the pneumatic hammer 27. The drill rod is adjusted as a whole so that the lower end of the second drill rod 63 stops at a position about 10 cm above the piston rod of the pneumatic hammer 27, and the clamping of the drill rod by the limiter 24 is released, and the pneumatic hammer 27 is started so that the piston rod of the pneumatic hammer 27 impacts the lower end of the second drill rod 63 within the range of motion, so as to drive the second drill rod 63 to move in the extension direction of the guide member 23, so that the drill head 61 cuts the seam on the inner wall surface of the lane. Further, when the lower end of the second drill rod 63 is increasingly away from the pneumatic hammer 27, the control member 26 can also drive the pneumatic hammer 27 to move toward the second drill rod 63, so as to reduce the distance between the pneumatic hammer 27 and the second drill rod 63, and further promote the drill rod as a whole to move toward the drilling hole. A protective cover (not shown) is provided on the piston rod of the pneumatic hammer 27 to protect the piston rod from being easily damaged.

[0051] Specifically, the drill bit 61 includes a drill bit body 611, a guide portion 612 and a slit portion 613. The drill bit body 611 is cylindrical, and has an internal thread on the inner wall surface of the drill bit body 611 adjacent to the lower end of the first drill rod 62, so that the drill bit body 611 can be threadedly connected with the first drill rod 62. The guide portion 612 is truncated cone-shaped, the area of ​​the upper end of the guide portion 612 is smaller than the area of ​​the lower end of the guide portion 612, the lower end of the guide portion 612 is fixedly connected to the upper end of the drill bit body 611, and the cross-sectional area of ​​the lower end of the guide portion 612 is the same as the cross-sectional area of ​​the drill bit body 611. The slit portion 613 is provided on the outer peripheral surface of the drill bit body 611 and extends along the extension direction of the drill bit body 611. The cross-sectional area of ​​the slit portion 613 is generally triangular, so as to facilitate slitting the inner wall surface of the drill hole. There are two slit portions 613, and the two slit portions 613 are arranged at intervals on the outer peripheral surface of the drill bit body 611.

[0052] In some embodiments, before S3 and after S2, the hole forming method for concentrated energy blasting further includes:

[0053] S21. Connect a third drill rod (not shown) to the lower end of the second drill rod 63 so that the drill bit 61 contacts the inner wall surface of the tunnel.

[0054] Specifically, when the drill bit 61 is still some distance away from the top surface of the tunnel, a third drill rod needs to be connected to the lower end of the second drill rod 63 so that the drill bit 61 can contact the inner wall surface of the tunnel.

[0055] During operation, the third drill rod is installed in the clamping hole 251, and the control member 26 moves axially along the vertical rod 28 to push the third drill rod toward the second drill rod 63. When the upper end of the third drill rod contacts the lower end of the second drill rod 63, the control member 26 controls the rotating member 29 to rotate so that the upper end of the third drill rod is threadedly connected to the lower end of the second drill rod 63.

[0056] S22. Repeat S21.

[0057] Specifically, when there is still a distance between the drill bit 61 and the top surface of the tunnel, continue to connect to the lower end of the third drill rod and then connect the drill rod to reduce the distance between the drill bit 61 and the top surface of the tunnel, so that the drill bit 61 is close to the top surface of the tunnel until the drill bit 61 is close to the opening of the drill hole.

[0058] S23, moving the drill bit 61 so that the drill bit 61 is located at a set position on the inner wall surface of the tunnel.

[0059] Specifically, the equipment platform 1 is driven to move in the tunnel by the walking device 3, and the drill bit 61 is moved in the tunnel, so that the drill bit 61 can cut at a set position on the inner wall surface of the tunnel.

[0060] S24, the drill head 61 has a gas outlet 614, the third drill rod, the second drill rod 63, the first drill rod 62 and the drill head 61 are connected, and nitrogen is introduced into the drill hole through the gas outlet 614.

[0061] Specifically, the gas outlet is formed in the middle of the guide portion 612, and the nitrogen production system 51 is connected to the drill rod and the drill bit 61. When the drill bit 61 is inserted into the borehole, nitrogen is introduced into the borehole through the gas outlet 614 to prevent gas accumulation in the borehole and ensure construction safety.

[0062] In some embodiments, after S3, the hole forming method for concentrated energy blasting further includes:

[0063] S4. A fourth drill rod (not shown) is connected to the lower end of the third drill rod, and the pneumatic hammer 27 pushes the fourth drill rod to move the drill bit 61 toward the drill hole.

[0064] In some embodiments, the hole forming method for focused blasting further comprises:

[0065] S5, repeat S24-S4, to extend the length of the drill rod as a whole. Specifically, a protective pad (not shown) is arranged at the lower end of the last fourth drill rod.

[0066] In some embodiments, the hole forming method for focused blasting further comprises:

[0067] S6. After the drilling is completed, the nitrogen generation system 51 is turned off, the clamping member 25 is moved to the position of the limit member 24, and the last fourth drill rod is clamped by the clamping member 25, and the rotating member 29 is installed on the control member 26. The control member 26 moves toward the last fourth drill rod and makes the lower end of the last fourth drill rod engage with the rotating member 29. The rotating member 29 drives the last fourth drill rod to rotate, so as to remove the last fourth drill rod from the penultimate drill rod, and manually remove the last fourth drill rod from the clamping member 25 and stack them neatly. In this way, the drill rods are disassembled until only the first drill rod 62 and the drill head 61 are left on the drilling device 2.

[0068] S7, retract the column 41, and move the equipment platform 1 to the next drilling location to be constructed through the walking device 3.

[0069] In the hole-forming method for energy-gathering blasting of the embodiment of the present invention, the drill bit 61 cuts a slit on the inner wall surface of the borehole. Compared with the prior art, the direction of the slit can be controlled to ensure the quality of the project. By constructing the borehole into an "energy-gathering tube", the use of the energy-gathering tube is saved, the cost is saved, the charge amount is increased while the hole diameter remains unchanged, the blasting power is increased, the spacing between adjacent boreholes can be increased, the drilling construction amount is reduced, the construction cost is solved, and the construction time is saved.

[0070] In the description of the present invention, it is to be understood that the 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., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention 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 limiting the present invention.

[0071] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0072] In the present invention, unless otherwise clearly specified and limited, the terms "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 one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0074] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0075] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A hole-forming method for concentrated charge blasting, characterized in that: include: S1. A first drill rod (62) and a drill head (61) are provided, wherein the drill head (61) is provided at the upper end of the first drill rod (62), and the drill head (61) is used to cut a slit on the inner wall surface of the drill hole; S2. A second drill rod (63) is connected to the lower end of the first drill rod (62), wherein the extension direction of the second drill rod (63) is consistent with the extension direction of the first drill rod (62); S3. The second drill rod (63), the first drill rod (62) and the drill bit (61) are connected as a whole and move toward the drill hole.

2. The hole-forming method for concentrated energy blasting according to claim 1, characterized in that: Before S3 and after S2, the hole-forming method for concentrated energy blasting further includes: S21. Connect a third drill rod to the lower end of the second drill rod (63).

3. The hole-forming method for concentrated energy blasting according to claim 2, characterized in that: Before S3 and after S21, the hole-forming method for concentrated energy blasting further includes: S22. Repeat S21; S23. Move the drill bit (61) so that the drill bit (61) is located at a set position on the inner wall surface of the tunnel.

4. The hole-forming method for concentrated energy blasting according to claim 3, characterized in that: The drill bit (61) has an air outlet (614), and the third drill rod, the second drill rod (63), the first drill rod (62) and the air outlet (614) are connected before S3 and after S23. The hole forming method for concentrated energy blasting also includes: S24. Introduce nitrogen into the borehole through the gas outlet (614).

5. The hole-forming method for concentrated energy blasting according to claim 4, characterized in that: Performing step S3 using a drilling device (2), wherein the drilling device (2) comprises a pneumatic hammer (27), wherein the pneumatic hammer (27) is arranged below the third drill rod, and the pneumatic hammer (27) is used to push the third drill rod to move toward the drill hole; S3. Use a pneumatic hammer (27) to push the third drill rod to move so that the drill bit (61) can extend into the drill hole and cut a slit on the inner wall surface of the drill hole.

6. The hole-forming method for concentrated energy blasting according to claim 5, characterized in that: After S3, the hole-forming method for concentrated energy blasting further includes: S4. A fourth drill rod is connected to the lower end of the third drill rod, and the pneumatic hammer (27) pushes the fourth drill rod to move the drill head (61) toward the drill hole.

7. The hole-forming method for concentrated energy blasting according to claim 6, characterized in that: Also includes: S5. Repeat S24-S4.

8. The hole-forming method for concentrated energy blasting according to claim 5, characterized in that: The drilling device (2) further comprises a guide member (23), a limiting member (24), a clamping member (25) and a control member (26). The limiting member (24) is arranged at the upper end of the guide member (23). The limiting member (24) has a limiting hole (241). The limiting hole (241) extends along the extension direction of the guide member (23). A drill rod can be inserted into the limiting hole (241). The clamping member (25) is slidably mounted on the guide member (23) and is located below the limiting member (24). The clamping member (25) is used to clamp the drill rod. The control member (26) is slidably mounted on the guide member (23) and is located below the clamping member (25). The control member (26) can move the drill rod along the axial direction of the guide member (23) so that the drill rod can be inserted into the limiting hole (241).

9. The hole-forming method for concentrated energy blasting according to claim 8, characterized in that: The S1 comprises: the first drill rod (62) is inserted into the limiting hole (241), and the clamping member (25) clamps the lower end of the first drill rod (62); The S2 comprises: the control member (26) moves toward the limiting member (24) to drive the first drill rod (62) to move toward the inner wall surface of the tunnel, the first drill rod (62) drives the clamping member (25) to move toward the inner wall surface of the tunnel, when the lower end of the first drill rod (62) is located in the limiting hole (241), the control member (26) returns to its original position, the clamping member (25) releases the first drill rod (62) and returns to its original position, and then the second drill rod (63) is installed in the clamping member (25), and the control member (26) moves toward the limiting member (24) to drive the second drill rod (63) to move toward the inner wall surface of the tunnel, so that the upper end of the second drill rod (63) can be connected to the lower end of the first drill rod (62).

10. The hole-forming method for concentrated energy blasting according to claim 8, characterized in that: It also includes a direction-adjusting member (21), the direction-adjusting member (21) being connected to the drilling device (2), and the direction-adjusting member (21) being used to adjust the rotation of the drilling device (2) relative to the inner wall surface of the tunnel so that the extension direction of the guide member (23) is consistent with the extension direction of the drilled hole; The step S23 comprises: the drilling device (2) is first moved to a set position, and then the drilling device (2) is adjusted using the direction adjustment member (21) so that the drill bit (61) is aligned with the set position on the inner wall surface of the tunnel.

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