Hole protecting device for deep hole blasting of strip mine

Abstract

The invention relates to the technical field of blasting hole protection equipment, and particularly discloses a strip mine deep hole blasting hole protection device which comprises a supporting column vertically installed in a deep hole. A cavity is formed in the supporting column; a group of sliding holes are formed in the inner side wall of the cavity; sliding plates are slidably connected to the inner side walls of the set of sliding holes. One end of the sliding plate is located in the cavity, the other end of the sliding plate is located outside the supporting column, and the end, extending out of the supporting column, of the sliding plate is fixedly connected with a supporting plate; the side walls, close to the sliding plates, of the supporting plates are connected with the outer side walls of the supporting columns through first springs. A pushing mechanism is arranged in the cavity; the pushing mechanism can push the sliding plates to slide towards the outside of the supporting column. After the supporting column is installed in the deep hole, the sliding plate is pushed by the pushing mechanism arranged in the supporting column to drive the supporting plate to move towards the direction close to the hole wall and make contact with the hole wall, the hole wall of the deep hole is supported through the supporting plate, the possibility that the hole wall is damaged due to blasting impact force is reduced, and the probability of hole collapse caused by deep hole blasting is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of blasting hole protection equipment, in particular to a deep hole blasting hole protection device for open-pit mines. Background Art

[0002] A deep hole usually refers to a blasthole with a diameter greater than 75mm, a depth of more than 5m and drilled by a deep hole drill. Deep hole blasting refers to drilling operations on a pre-repaired step, and loading extended explosive packs into the drilled deep hole for blasting. Deep hole blasting has the advantages of good crushing quality, crushing block size meeting engineering requirements, basically no large pieces that do not meet the specifications, no foundation, concentrated blast piles with a certain degree of looseness, which meets the loading requirements of shovel loading equipment.

[0003] In the existing technology, blasting is used for construction. Due to the destructive force of blasting and the impact effect caused, the crushed stone will have a destructive effect on the protective wall. The hole wall is prone to collapse when subjected to a large impact, resulting in a waste hole, which reduces the production efficiency of the open-pit mine and affects the overall construction progress. Summary of the invention

[0004] The present application provides a hole protection device for deep hole blasting in an open-pit mine, which has the function of protecting the hole wall and reducing the occurrence of a waste hole phenomenon caused by the collapse of the hole wall during the blasting process.

[0005] The present application provides an open-pit mine deep hole blasting protection device, which adopts the following technical solution: A deep hole blasting protection device for an open-pit mine, comprising a support column vertically installed in a deep hole; a cavity is provided in the support column; a group of sliding holes are provided on the inner side wall of the cavity; a group of slide plates are slidably connected to the inner side walls of the slide holes; one end of the slide plate is located in the cavity, and the other end is located outside the support column, and the end of the slide plate extending outside the support column is fixedly connected to a supporting plate; the side wall of the supporting plate close to the slide plate is connected to the outer side wall of the support column through a first spring; a pushing mechanism is provided in the cavity; the pushing mechanism can push a group of slide plates to slide toward the outside of the support column.

[0006] By adopting the above technical scheme, when it is necessary to blast a deep hole, the support column is first installed into the deep hole, and a group of slide plates are pushed to slide toward the outside of the support column by a pushing mechanism arranged in the cavity. During the sliding process of the slide plate, the support plate will be driven to stretch the first spring and then move toward the direction close to the hole wall, so that the support plate gradually approaches the hole wall and contacts the hole wall, and the hole wall is supported by the support plate abutting against the inner circumference of the hole wall. During the deep hole blasting process, the support plate abutting against the inner circumference of the hole wall will support and protect the hole wall, reducing the possibility of hole wall damage caused by the blasting impact force generated during the blasting process, thereby reducing the probability of hole collapse during deep hole blasting and improving the production efficiency of open-pit mines.

[0007] Preferably, a threaded hole is provided on the inner wall of the top end of the cavity; the pushing mechanism includes a pushing block and a threaded rod; the pushing block is slidably connected to the inner wall of the cavity, the top surface of the pushing block is connected to the inner wall of the top end of the cavity through a second spring, and the bottom surface of the pushing block is provided with a rounded corner; a group of end surfaces of the slide plates extending into the cavity are all provided with inclined surfaces that can cooperate with the rounded corners; the threaded rod is threadedly connected to the inner wall of the threaded hole, and the bottom end of the threaded rod is in contact with the top surface of the pushing block.

[0008] By adopting the above technical solution, after the support column is installed in the deep hole, the spiral rod is manually rotated to move downward. During the downward movement of the threaded rod, the push block will be squeezed to stretch the second spring and then move toward the direction close to the slide plate. When the push block contacts the slide plate, the cooperation of the rounded corners and the inclined surface causes the push block to push the slide plate toward the outside of the support column during the movement, so that the support plate gradually approaches the hole wall and sticks to the hole wall. The hole wall is supported and protected by the support plate sticking to the inner circumference of the hole wall, thereby reducing the possibility of damage to the hole wall due to the impact force during the blasting process.

[0009] Preferably, a group of fixing plates erected on the ground are fixedly connected to the outer wall of the support column near the top; one group of fixing plates is provided with anchor rods; the anchor rods vertically penetrate the fixing plates and are anchored in the ground, and nuts are threadedly connected to the outer wall where the anchor rods are exposed from the top of the fixing plates; the nuts press the fixing plates to the ground.

[0010] By adopting the above technical solution, after the support column is placed in the deep hole, the anchor rod is passed through the fixing plate and anchored into the ground, and then a nut is installed on the outer wall of the anchor rod near the top. The anchor rod is locked by the nut and the fixing plate is pressed on the ground, thereby realizing the installation of the support column in the deep hole, so that the support column remains stable during the deep hole blasting process, reducing the possibility of the support column detaching from the deep hole under the action of the blasting impact force.

[0011] Preferably, an opening is provided at the bottom end of the support column, and an end cap is threadedly connected to the outer wall of the bottom end of the support column and is blocked at the opening; a water bag located in the opening is placed on the top surface of the end cap; a water nozzle connected to the inside of the opening is fixedly connected to the outer wall of the support column near the bottom end; and a puncturing component capable of puncturing the water bag is provided on the bottom surface of the end cap.

[0012] By adopting the above technical scheme, when the explosives inside the deep hole explode, a large impact force will be generated in the deep hole. When the impact force is transmitted to the end cover, the impact airflow will drive the puncture component to move, prompting the puncture component to puncture the water bag. After the water bag is punctured, the water contained in it flows out and is then sprayed out through the water nozzle. The water sprayed by the water nozzle is used to spray the dust gas generated in the deep hole during the blasting process to reduce dust, thereby reducing the possibility of dust generated during the blasting process escaping from the deep hole to pollute the environment, thereby improving the environmental quality of the construction site.

[0013] Preferably, the puncture assembly includes a circular tube and a puncture needle; the circular tube is fixedly connected to the bottom surface of the end cover, the circular tube is connected to the inside of the opening, and a pad is slidably connected to the inner wall of the circular tube; the puncture needle is fixedly connected to the top surface of the pad, and the puncture needle can be extended into the opening to puncture the water bag.

[0014] By adopting the above technical solution, when deep hole blasting is carried out, the impact force generated during the blasting process will push the pad to slide up along the inner wall of the circular tube, and the pad drives the puncture needle to move upward, prompting the puncture needle to extend from the circular tube to the opening to puncture the water bag, and the water in the water bag flows out, so that the water nozzle can spray water to spray the dust gas generated during the deep hole blasting process to reduce dust.

[0015] Preferably, a pressure plate is slidably connected to the inner side wall of the opening away from the end cover via a third spring; and the bottom surface of the pressure plate is in contact with the water bag.

[0016] By adopting the above technical solution, when the water bag is not punctured, the third spring is in a compressed state, and the water bag supports the pressure plate. When the water bag is punctured by the puncture needle, the pressure plate squeezes the water bag under the elastic force of the third spring, causing the water in the water bag to be quickly discharged, thereby improving the response speed of the water nozzle to spray water to reduce dust, and then improving the dust reduction effect on dust.

[0017] Preferably, a trumpet tube connected to the circular tube is fixedly connected to the bottom end of the circular tube; and a large head of the trumpet tube is located on a side away from the bottom end of the circular tube.

[0018] By adopting the above technical solution, when the airflow generated during the blasting process enters the round tube from the trumpet tube, the flow rate of the blasting airflow will increase, thereby increasing the impact speed of the puncture needle moving upward to puncture the water bag, thereby improving the puncture effect of the puncture needle on the water bag.

[0019] Preferably, a rubber pad is fixedly connected to the side wall of the supporting plate away from the skateboard.

[0020] By adopting the above technical solution, the rubber pads arranged on the side walls of the support plates play a certain buffering effect during deep hole blasting, reducing the rigid impact between the hole wall rock and the support plates, reducing the damage of the hole wall rock to the support plates, and helping to extend the service life of the support plates.

[0021] Preferably, an exhaust port is provided on the fixing plate.

[0022] By adopting the above technical solution, the exhaust port arranged on the fixed plate reduces the blocking area of ​​the deep hole by the fixed plate, so that the high-pressure gas generated in the deep hole during the blasting process can be discharged out of the deep hole.

[0023] Preferably, a groove is provided on the outer wall of the support column corresponding to the position of the water spray nozzle; and the water spray nozzle is located in the groove.

[0024] By adopting the above technical solution, the water nozzle is arranged in the groove to protect the water nozzle, thereby reducing the possibility of accidental damage to the water nozzle due to exposure to the outside of the support column.

[0025] In summary, this application has the following beneficial effects: 1. The support column is installed in the deep hole, and the push block is pushed downward by rotating the threaded rod. The push block stretches the second spring under the extrusion of the threaded rod and slides toward the direction close to the slide plate and contacts the slide plate. Under the cooperation of the fillet and the inclined surface, the slide plate moves toward the outside of the support column and causes the support plate to be close to the hole wall. The hole wall is supported and protected by the support plate, which reduces the possibility of damage to the hole wall caused by the blasting impact force, thereby reducing the probability of hole collapse in deep hole blasting and improving the production efficiency of open-pit mines; 2. The impact airflow generated during the deep hole blasting process enters the round tube through the trumpet tube. The impact airflow entering the round tube will push the pad and the puncture needle to move vertically upward, so that the puncture needle punctures the water bag. After the water bag is punctured, the water contained in the water bag flows out and is sprayed out by the water nozzle, thereby spraying and reducing dust impurities generated during the blasting process, reducing the possibility of dust generated during the blasting process escaping from the deep hole to pollute the environment, thereby improving the environmental quality of the construction site; 3. When the water bag is not punctured by the puncture needle, the third spring is in a compressed state. At this time, the water bag supports the pressure plate. When the water bag is punctured by the puncture needle, the pressure plate will squeeze the water bag under the elastic force of the third spring, thereby prompting the water in the water bag to be quickly discharged, thereby improving the response speed of the water nozzle to spray water to reduce dust, so as to carry out timely spray dust reduction treatment on the dust gas generated during the blasting process, thereby improving the dust reduction effect on the dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a deep hole blasting protection device for open-pit mines; Figure 2 It is a schematic diagram of the matching structure of the support column and a set of fixing plates in this application; Figure 3 It is a schematic diagram of the coordination structure of the support column, the driving mechanism and a set of support plates in this application; Figure 4 It is a schematic diagram of the matching structure of the support plate and the slide plate in this application; Figure 5 It is a schematic diagram of the matching structure of the support column, the water bag and the puncture component in this application; Figure 6 yes Figure 5 The enlarged view of point A in the middle; Figure 7 It is a schematic diagram of the matching structure of the end cover and the puncture assembly in this application.

[0027] Explanation of the reference numerals in the accompanying drawings: 1. Support column; 11. Cavity; 12. Sliding hole; 13. Threaded hole; 14. Opening; 15. Groove; 2. Slide plate; 3. Support plate; 31. First spring; 32. Rubber pad; 4. Pushing mechanism; 41. Push block; 42. Threaded rod; 43. Second spring; 5. Fixing plate; 51. Anchor rod; 52. Nut; 53. Exhaust port; 6. End cover; 61. Water bag; 62. Water nozzle; 7. Puncture assembly; 71. Round tube; 72. Puncture needle; 73. Pad; 74. Trumpet tube; 8. Third spring; 81. Pressure plate. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings. The same components are denoted by the same reference numerals. It should be noted that the terms "front", "rear", "left", "right", "upper", "lower", "bottom" and "top" used in the following description refer to directions in the accompanying drawings, and the terms "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0029] The present invention discloses a deep hole blasting protection device for open-pit mines, such as Figure 1 and Figure 2 As shown, it includes a support column 1 vertically installed in a deep hole, and four fixing plates 5 that can be erected on the ground are fixedly connected to the outer wall of the support column 1 near the top. The four fixing plates 5 are evenly arranged along the outer periphery of the support column 1, and each fixing plate 5 is provided with an anchor rod 51 that vertically penetrates the fixing plate 5 and is anchored into the ground. Each anchor rod 51 is threadedly connected to a nut 52 that presses the fixing plate 5 on the ground on the outer wall exposed from the top of the fixing plate 5, and an exhaust port 53 is opened at the position of each fixing plate 5 corresponding to the deep hole.

[0030] When protecting a deep hole, the support column 1 is placed vertically in the deep hole, and the fixing plate 5 is set on the ground to support the support column 1. Then the anchor rod 51 passes through the fixing plate 5 and is anchored into the ground and locked by the nut 52, thereby realizing the installation of the support column 1 in the deep hole, so as to subsequently protect the inner wall of the deep hole. The exhaust port 53 opened on the fixing plate 5 reduces the blocking area of ​​the fixing plate 5 to the deep hole, so that the high-pressure gas generated in the deep hole during the blasting process can be discharged.

[0031] like Figure 1 and Figure 3As shown, a cavity 11 is coaxially opened inside the support column 1, and four sliding holes 12 are opened on the inner wall of the cavity 11. The four sliding holes 12 are evenly arranged along the outer periphery of the support column 1, and a slide plate 2 is slidably connected to the inner wall of each sliding hole 12. The slide plate 2 passes through the sliding hole 12, and one end of the slide plate 2 is located in the cavity 11, and the other end extends to the outside of the support column 1. The end of each slide plate 2 extending outside the support column 1 is fixedly connected to a supporting plate 3 located outside the support column 1, and the supporting plate 3 is arc-shaped. A first spring 31 is fixedly connected to the side wall of each supporting plate 3 close to the support column 1, and the end of the first spring 31 away from the supporting plate 3 is fixedly connected to the outer wall of the support column 1; A pushing mechanism 4 is also provided in the cavity 11, which can push the four slides 2 to slide toward the outside of the support column 1, and the pushing mechanism 4 includes a pushing block 41 and a threaded rod 42; the pushing block 41 is slidably connected to the inner wall of the cavity 11, and a second spring 43 is fixedly connected to the top surface of the pushing block 41, and the end of the second spring 43 away from the pushing block 41 is fixedly connected to the inner wall of the top end of the cavity 11, and a rounded corner is provided on the bottom surface of the pushing block 41, and the end surfaces of the four slides 2 extending into the cavity 11 are all provided with inclined surfaces that can cooperate with the rounded corner; a threaded hole 13 is opened on the inner wall of the cavity 11 connected to the second spring 43, and the threaded rod 42 is threadedly connected to the inner wall of the threaded hole 13, and the bottom end of the threaded rod 42 contacts with the top surface of the pushing block 41.

[0032] After the support column 1 is installed in the deep hole, the push block 41 is pushed downward by rotating the threaded rod 42. The push block 41 stretches the second spring 43 under the extrusion of the threaded rod 42 and then slides toward the direction close to the slide plate 2 and contacts the slide plate 2. With the cooperation of the fillet and the inclined surface, the push block 41 pushes the slide plate 2 toward the outside of the support column 1, thereby prompting the support plate 3 to stick to the hole wall to support and protect the hole wall, thereby reducing the possibility of collapse of the deep hole during blasting and avoiding the occurrence of waste holes.

[0033] like Figure 3 and Figure 4 As shown, a rubber pad 32 is fixedly connected to the side wall of each supporting plate 3 away from the slide plate 2 .

[0034] The provision of the rubber pad 32 plays a certain buffering effect during the deep hole blasting process, reduces the rigid impact between the hole wall and the support plate 3, reduces the damage of the hole wall rock to the support plate 3, and increases the service life of the support plate 3.

[0035] like Figure 1 , Figure 5 and Figure 6As shown, an opening 14 is provided on the bottom surface of the support column 1, and an end cover 6 is threadedly connected to the outer wall of the bottom end of the support column 1 to block the opening 14, and a water bag 61 located in the opening 14 is placed on the top surface of the end cover 6. A plurality of water nozzles 62 connected to the inside of the opening 14 are fixedly connected to the outer wall of the support column 1 near the bottom end, and the plurality of water nozzles 62 are evenly arranged along the outer periphery of the support column 1, and grooves 15 are provided on the outer wall of the support column 1 corresponding to the position of each water nozzle 62, and the plurality of water nozzles 62 are respectively located in the plurality of grooves 15, and a puncturing component 7 that can puncture the water bag 61 is provided on the end cover 6.

[0036] When the explosives are blasted at the bottom of the deep hole, a large impact airflow will be generated. The impact airflow drives the puncture component 7 set on the end cover 6 to puncture the water bag 61, causing the water in the water bag 61 to be discharged. After the water in the water bag 61 is discharged, it is sprayed out through the water nozzle 62, thereby spraying and dust reduction treatment is performed on the dust gas generated during the blasting process, reducing the possibility of dust gas escaping from the deep hole to pollute the environment, thereby improving the environmental quality of the construction site.

[0037] like Figure 5 and Figure 7 As shown, the puncture assembly 7 includes a circular tube 71 and a puncture needle 72. The circular tube 71 is fixedly connected to the bottom surface of the end cover 6. The circular tube 71 is connected to the inside of the opening 14. A pad 73 is slidably connected to the inner wall of the circular tube 71. The puncture needle 72 is fixedly connected to the top surface of the pad 73. The puncture needle 72 can extend into the opening 14 to puncture the water bag 61. A trumpet tube 74 connected to the inside of the circular tube 71 is coaxially fixedly connected to the bottom end of the circular tube 71. The large head of the trumpet tube 74 is located on the side away from the bottom end of the circular tube 71, and the inner diameter of the small head of the trumpet tube 74 is the same as the inner diameter of the circular tube 71.

[0038] The impact airflow generated during the deep hole blasting process enters the trumpet tube 74 through the large head of the trumpet tube 74. When the impact airflow enters the circular tube 71 from the trumpet tube 74, the impact airflow pushes the pad 73 upward, prompting the puncture needle 72 to extend into the opening 14 to puncture the water bag 61, so that the water in the water bag 61 can be sprayed out by the water nozzle 62 to reduce the dust. The setting of the trumpet tube 74 increases the flow rate of the impact airflow entering the circular tube 71, and increases the impact speed of the puncture needle 72, so that the puncture needle 72 can more easily puncture the water bag 61.

[0039] like Figure 5 As shown, a pressure plate 81 located on the side of the water bag 61 away from the end cover 6 is slidably connected to the inner wall of the opening 14, and a third spring 8 is fixedly connected to the top surface of the pressure plate 81. The end of the third spring 8 away from the pressure plate 81 is fixedly connected to the inner wall of the top end of the opening 14, and the bottom surface of the pressure plate 81 is in contact with the water bag 61.

[0040] Before the water bag 61 is punctured, the water bag 61 supports the pressure plate 81, and the third spring 8 is in a compressed state. When the water bag 61 is punctured, the water bag 61 loses its supporting effect on the pressure plate 81. Under the elastic force of the third spring 8, the pressure plate 81 slides down quickly to squeeze the water bag 61, causing the water in the water bag 61 to be quickly discharged, thereby increasing the response speed of the water spraying nozzle 62, and further improving the dust reduction treatment effect.

[0041] Working principle: When performing deep hole blasting, the support column 1 is placed vertically in the deep hole, and the fixing plate 5 is set up on the ground to support the support column 1. Then, the anchor rod 51 passes through the fixing plate 5 and is anchored into the ground and locked by the nut 52 to realize the installation of the support column 1 in the deep hole. After the support column 1 is installed, the threaded rod 42 is rotated to move downward to push the push block 41 to slide. The push block 41 stretches the second spring 43 under the extrusion of the threaded rod 42 and then slides in the direction close to the slide plate 2 and contacts the slide plate 2. Under the cooperation of the fillet and the inclined surface, the slide plate 2 moves toward the outside of the support column 1, prompting the support plate 3 to stick to the hole wall to support and protect the hole wall, thereby reducing the possibility of collapse of the deep hole during the blasting process. The explosive buried at the bottom of the deep hole will produce a greater impact effect in the deep hole when blasting the deep hole. The impact airflow generated during the blasting process enters the circular tube 71 from the bottom of the trumpet tube 74. The impact airflow entering the circular tube 71 pushes the pad 73 and the puncture needle 72 to move vertically upward, prompting the puncture needle 72 to puncture the water bag 61. After the water bag 61 is punctured, the water contained in the water bag 61 is sprayed out through the water nozzle 62, thereby spraying and reducing dust impurities generated during the blasting process, reducing the possibility of dust generated during the blasting process escaping from the deep hole to pollute the environment, and improving the environmental quality of the construction site; When the water bag 61 is punctured by the puncture needle 72, the pressure plate 81 squeezes the water bag 61 under the elastic force of the third spring 8, causing the water in the water bag 61 to be quickly discharged, thereby increasing the response speed of the water nozzle 62 for spraying water to reduce dust and improving the dust reduction effect of the spraying dust reduction work.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A deep hole blasting protection device for open-pit mines, characterized in that: The invention comprises a support column (1) vertically installed in a deep hole; a cavity (11) is arranged in the support column (1); a group of sliding holes (12) are arranged on the inner wall of the cavity (11); a slide plate (2) is slidably connected to the inner wall of each group of the sliding holes (12); one end of the slide plate (2) is located in the cavity (11), and the other end is located outside the support column (1); the end of the slide plate (2) extending outside the support column (1) is fixedly connected to a supporting plate (3); the side wall of the supporting plate (3) close to the slide plate (2) is connected to the outer wall of the support column (1) through a first spring (31); a pushing mechanism (4) is arranged in the cavity (11); the pushing mechanism (4) can push a group of slide plates (2) to slide toward the outside of the support column (1).

2. The open-pit mine deep hole blasting protection device according to claim 1, characterized in that: A threaded hole (13) is provided on the inner side wall of the top end of the cavity (11); the pushing mechanism (4) comprises a pushing block (41) and a threaded rod (42); the pushing block (41) is slidably connected to the inner side wall of the cavity (11); the top surface of the pushing block (41) is connected to the inner side wall of the top end of the cavity (11) via a second spring (43); the bottom surface of the pushing block (41) is provided with a rounded corner; the end surfaces of a group of the slide plates (2) extending into the cavity (11) are all provided with an inclined surface that can cooperate with the rounded corner; the threaded rod (42) is threadedly connected to the inner side wall of the threaded hole (13), and the bottom end of the threaded rod (42) contacts the top surface of the pushing block (41).

3. The open-pit mine deep hole blasting protection device according to claim 1, characterized in that: A group of fixing plates (5) erected on the ground are fixedly connected to the outer wall of the support column (1) near the top; one group of fixing plates (5) is provided with anchor rods (51); the anchor rods (51) vertically penetrate the fixing plates (5) and are anchored in the ground, and nuts (52) are threadedly connected to the outer wall of the fixing plates (5) exposed at the top of the fixing plates (5); the nuts (52) press the fixing plates (5) on the ground.

4. The open-pit mine deep hole blasting protection device according to claim 1, characterized in that: An opening (14) is provided at the bottom end of the support column (1); an end cap (6) is threadedly connected to the outer wall of the bottom end of the support column (1) and is arranged at the opening (14); a water bag (61) is placed on the top surface of the end cap (6) and is located in the opening (14); a water nozzle (62) is fixedly connected to the outer wall of the support column (1) near the bottom end and is communicated with the inside of the opening (14); and a piercing assembly (7) is provided on the bottom surface of the end cap (6) and is capable of piercing the water bag (61).

5. The open-pit mine deep hole blasting protection device according to claim 4, characterized in that: The puncture assembly (7) comprises a circular tube (71) and a puncture needle (72); the circular tube (71) is fixedly connected to the bottom surface of the end cover (6), the circular tube (71) is communicated with the inside of the opening (14), and a pad (73) is slidably connected to the inner wall of the circular tube (71); the puncture needle (72) is fixedly connected to the top surface of the pad (73), and the puncture needle (72) can be extended into the opening (14) to puncture the water bag (61).

6. The open-pit mine deep hole blasting protection device according to claim 4, characterized in that: A pressure plate (81) is slidably connected to the inner side wall of the opening (14) away from the end cover (6) via a third spring (8); the bottom surface of the pressure plate (81) is in contact with the water bag (61).

7. The open-pit mine deep hole blasting protection device according to claim 5, characterized in that: The bottom end of the circular tube (71) is fixedly connected with a bell tube (74) which is in communication with the circular tube (71); the large head of the bell tube (74) is located on a side away from the bottom end of the circular tube (71).

8. The open-pit mine deep hole blasting protection device according to claim 1, characterized in that: A rubber pad (32) is fixedly connected to the side wall of the support plate (3) away from the slide plate (2).

9. The open-pit mine deep hole blasting protection device according to claim 3, characterized in that: The fixing plate (5) is provided with an exhaust port (53).

10. The open-pit mine deep hole blasting protection device according to claim 4, characterized in that: A groove (15) is provided on the outer wall of the support column (1) corresponding to the location of the water spray nozzle (62); the water spray nozzle (62) is located in the groove (15).

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