Carbon dioxide blasting device for rock mass and rock mass blasting method

Abstract

The present invention aims to provide a carbon dioxide blasting device for rock masses and a rock mass blasting method, which includes a blasting pipe and a blasting component. A liquid storage cavity is formed in the blasting pipe, and a heating rod is arranged on the top wall of the liquid storage cavity. The blasting component includes a sleeve, a slip ring, a bursting disc and a clamping member. The sleeve is arranged at the bottom of the blasting pipe, and the sleeve is provided with a pressure relief cavity and a clamping hole which are communicated with each other. The bursting disc is arranged between the sleeve and the blasting pipe so that the bursting disc separates the liquid storage cavity and the pressure relief cavity. The slip ring is slidably arranged in the pressure relief cavity, and the clamping member is slidably arranged on the slip ring. When the liquid carbon dioxide in the liquid storage cavity breaks through the bursting disc and vaporizes, the gaseous carbon dioxide is used to push the slip ring to slide, so that at least part of the clamping member extends out of the clamping hole. In this way, with the occurrence of blasting, the carbon dioxide blasting device for rock masses is stuck by the blasting slag, thus effectively solving the problem of flying pipes of the carbon dioxide blasting device for rock masses.

Description

Technical Field

[0001] The present invention relates to the field of carbon dioxide blasting, and particularly to a carbon dioxide blasting device for rock mass and a rock mass blasting method. Background Art

[0002] Carbon dioxide gas can be transformed into a liquid state under a certain high pressure. The liquid carbon dioxide is compressed into a blasting tube through a high-pressure pump, and a rupture disc, a heat conducting rod and a sealing ring are installed. Tightening the alloy cap completes the assembly work before blasting. During detonation, the heat conducting rod is heated by a detonator, so that the liquid carbon dioxide is heated and rapidly vaporized, and the volume expands rapidly to break through the rupture disc, and the formed high-pressure shock wave causes the rock mass to crack.

[0003] However, the existing carbon dioxide blasting devices have the following problems in actual use. During the blasting process, there is a problem of flying tubes for the blasting tubes. Specifically, due to insufficient blockage between the blasting tube and the blast hole, when the liquid carbon dioxide vaporizes, the volume expands rapidly, and the impact force of the carbon dioxide acts on the blasting tube in the opposite direction, resulting in the blasting tube flying out of the blast hole. In the lightest case, it leads to blasting failure, and in the most serious case, it damages equipment such as the blasting tube. Therefore, in order to solve the problem of flying tubes for the blasting tubes, the carbon dioxide blasting device for rock mass and the rock mass blasting method of the present application are proposed. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a carbon dioxide blasting device for rock mass and a rock mass blasting method that can effectively avoid the problem of flying tubes for the blasting tube during the blasting process, so as to ensure effective blasting and reduce safety risks at the same time.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A carbon dioxide blasting device for rock mass, comprising:

[0007] A blasting tube, a liquid storage cavity is opened in the blasting tube, and a heating rod is arranged on the top wall of the liquid storage cavity; and

[0008] A blasting assembly, the blasting assembly includes a sleeve, a slip ring, a rupture disc and a clamping member. The sleeve is arranged at the bottom of the blasting tube. The sleeve is provided with a pressure relief cavity and a clamping hole that communicate with each other. The rupture disc is arranged between the sleeve and the blasting tube, so that the rupture disc separates the liquid storage cavity and the pressure relief cavity. The slip ring is slidably arranged in the pressure relief cavity, and the clamping member is slidably arranged on the slip ring;

[0009] When the liquid carbon dioxide in the liquid storage cavity breaks through the rupture disc to vaporize, the gaseous carbon dioxide pushes the slip ring to slide, so that at least part of the clamping member extends out of the clamping hole.

[0010] Preferably, a screwing structure is adopted between the sleeve and the blasting pipe.

[0011] Preferably, the blasting assembly further includes a pressure relief pipe and a pressure relief piece. The pressure relief pipe is arranged at the end of the sleeve far away from the blasting pipe, and the pressure relief piece is arranged between the pressure relief pipe and the sleeve.

[0012] Preferably, pressure relief holes are formed in the side wall of the pressure relief pipe.

[0013] Preferably, through holes are further formed in the side wall of the sleeve.

[0014] Preferably, the positioning member includes a clamping column and a positioning spring. The clamping column is slidably arranged on the sliding ring. The positioning spring abuts against the clamping column and the sliding ring respectively. The positioning spring is used to push the clamping column so that the clamping column has a tendency to move radially away from the axis.

[0015] Preferably, the cross section of the clamping column is of a T-shaped structure.

[0016] Preferably, a sliding groove is axially formed in the sliding ring, and the clamping column is slidably arranged in the sliding groove.

[0017] Preferably, a plurality of positioning members are provided, and each positioning member is slidably arranged on the sliding ring in a circumferential manner.

[0018] A rock blasting method is implemented by using the carbon dioxide blasting device for rock as described in any one of the above. The method includes the following steps:

[0019] Step S11: Inject liquid carbon dioxide into the liquid storage cavity to obtain an injection blasting device;

[0020] Step S12: Drill a blast hole on the rock at a preset distance from the free face. The diameter of the blast hole is A1, and the diameter of the blasting pipe is A2, where the range of A1 - A2 is 5 mm to 12 mm;

[0021] Step S13: Place the injection blasting device into the blast hole;

[0022] Step S14: Use sand to fill the gap between the injection blasting device and the blast hole;

[0023] Step S15: Connect the heating rod and the detonator by using a wire;

[0024] Step S16: Press the detonator to send a detonation electrical signal to the heating rod.

[0025] Compared with the prior art, the present invention has at least the following advantages:

[0026] The carbon dioxide blasting device for rock mass and the rock mass blasting method of the present invention include a blasting pipe and a blasting component. A liquid storage cavity is formed in the blasting pipe, and a heating rod is arranged on the top wall of the liquid storage cavity. The blasting component includes a sleeve, a slip ring, a bursting disc and a clamping member. The sleeve is arranged at the bottom of the blasting pipe. The sleeve is provided with a pressure relief cavity and a clamping hole which are communicated with each other. The bursting disc is arranged between the sleeve and the blasting pipe so that the bursting disc separates the liquid storage cavity and the pressure relief cavity. The slip ring is slidably arranged in the pressure relief cavity, and the clamping member is slidably arranged on the slip ring. When the liquid carbon dioxide in the liquid storage cavity breaks through the bursting disc and vaporizes, the gaseous carbon dioxide pushes the slip ring to slide, so that at least part of the clamping member extends out of the clamping hole. In this way, the clamping member abuts against the inner side wall of the blast hole of the rock mass. With the occurrence of blasting, since the overall outer diameter of the carbon dioxide blasting device for rock mass is larger than the outer diameter of the blasting pipe under the action of the clamping member, the carbon dioxide blasting device for rock mass is stuck by the blasting slag, thus effectively solving the problem of flying pipes of the carbon dioxide blasting device for rock mass. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 Structural schematic diagram of the carbon dioxide blasting device for rock mass according to an embodiment of the present invention;

[0029] Figure 2 For Figure 1 Partial structural schematic diagram of the carbon dioxide blasting device for rock mass shown;

[0030] Figure 3 For Figure 1 Partial structural schematic diagram of the carbon dioxide blasting device for rock mass in another state shown;

[0031] Figure 4 Structural schematic diagram of the carbon dioxide blasting device for rock mass according to another embodiment of the present invention;

[0032] Figure 5 Structural schematic diagram of the clamping member according to another embodiment of the present invention;

[0033] Figure 6 Structural schematic diagram of the carbon dioxide blasting device for rock mass according to still another embodiment of the present invention;

[0034] Figure 7 For Figure 6 Partial enlarged structural schematic diagram of A of

[0035] Figure 8 is Figure 6 A partial structural schematic diagram of a carbon dioxide blasting device for rock masses;

[0036] Figure 9 A structural schematic diagram of a seal in an embodiment of the present invention;

[0037] Figure 10 A process schematic diagram of a rock mass blasting method in an embodiment of the present invention. Specific embodiments

[0038] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings.

[0039] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0040] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying 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 one or more of such features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more unless otherwise specifically defined.

[0041] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0042] Such as Figures 1 to 3As shown in the figure, a carbon dioxide blasting device 10 for rock masses includes a blasting pipe 100 and a blasting assembly 200. A liquid storage cavity 110 is formed in the blasting pipe 100, and a heating rod 300 is arranged on the top wall of the liquid storage cavity 110. The blasting assembly 200 includes a sleeve 210, a slip ring 220, a bursting disc 230 and a clamping member 240. The sleeve 210 is arranged at the bottom of the blasting pipe 100. The sleeve 210 is provided with a pressure relief cavity 211 and a clamping hole 212 which are communicated with each other. The bursting disc 230 is arranged between the sleeve 210 and the blasting pipe 100, so that the bursting disc 230 separates the liquid storage cavity 110 and the pressure relief cavity 211. The slip ring 220 is slidably arranged in the pressure relief cavity 211, and the clamping member 240 is slidably arranged on the slip ring 220. When the liquid carbon dioxide in the liquid storage cavity 110 breaks through the bursting disc 230 to vaporize, the gaseous carbon dioxide is used to push the slip ring 220 to slide, so that at least a part of the clamping member 240 extends out of the clamping hole 212.

[0043] It should be noted that a liquid storage cavity 110 is formed inside the blasting tube 100, and the liquid storage cavity 110 is used to store liquid carbon dioxide. A heating rod 300 is installed on the top wall of the liquid storage cavity 110. In one embodiment, the blasting tube 100 is further provided with a liquid injection hole, and the liquid injection hole is communicated with the liquid storage cavity 110, so that an external air pump can inject liquid carbon dioxide into the liquid storage cavity 110 through the liquid injection hole. Further, the sleeve 210 is installed at the lower end of the blasting tube 100, so that the pressure relief cavity 211 of the sleeve 210 is communicated with the liquid storage cavity 110. Further, the bursting disc 230 is installed at the lower end of the liquid storage cavity 110, so that the bursting disc 230 isolates the liquid storage cavity 110 and the pressure relief cavity 211. Further, the sliding ring 220 is slidably installed in the pressure relief cavity 211. Specifically, the sliding ring 220 and the pressure relief cavity 211 are coaxially arranged, and the sliding ring 220 reciprocates along the axial direction of the pressure relief cavity 211. The positioning member 240 is slidably installed on the sliding ring 220. Specifically, the positioning member 240 is installed on one end face of the sliding ring 220, so that the positioning member 240 reciprocates along the radial direction of the sliding ring 220. Further, a positioning hole 212 is formed in the side wall of the sleeve 210. When the sliding ring 220 slides in a certain specified direction in the pressure relief cavity 211, for example, when the carbon dioxide blasting device 10 for rock mass is placed vertically, when the sliding ring 220 slides upward or downward along the vertical direction, when the positioning member 240 is aligned with the positioning hole 212, a part of the structure of the positioning member 240 will protrude from the positioning hole 212. In one embodiment, the outer diameter of the blasting tube 100 and the outer diameter of the sleeve 210 are set to be the same structure. When the positioning member 240 protrudes from the outer side wall of the sleeve 210, it is equivalent to increasing the diameter of the sleeve 210. Thus, when the liquid carbon dioxide in the liquid storage cavity 110 is heated and vaporized by the heating rod 300, when the gas breaks through the bursting disc 230, the air pressure will act on the sliding ring 220, so that the sliding ring 220 drives the positioning member 240 to approach the positioning hole 212, and finally a part of the structure of the positioning member 240 penetrates out of the positioning hole 212. Thus, with the occurrence of blasting, the positioning member 240 abuts against the inner side wall of the blast hole of the rock mass. Since the overall outer diameter of the sleeve 210 is larger than the outer diameter of the blasting tube 100 under the action of the positioning member 240, the carbon dioxide blasting device 10 for rock mass is stuck by the blasting slag, thereby effectively solving the problem of flying tube of the carbon dioxide blasting device 10 for rock mass.

[0044] In one embodiment, the sleeve 210 and the blasting tube 100 are in a screwed connection structure. Thus, the sleeve 210 and the blasting tube 100 are detachable structures, and it is beneficial to install the sliding ring 220. Specifically, after the positioning member 240 is installed on the sliding ring 220, the sliding ring 220 is installed in the sleeve 210, and finally the sleeve 210 is installed on the blasting tube 100.

[0045] Such asFigure 4 As shown, in one embodiment, the blasting assembly 200 further includes a pressure relief pipe 250 and a pressure relief piece 260. The pressure relief pipe 250 is disposed at the end of the sleeve 210 away from the blasting pipe 100, and the pressure relief piece 260 is disposed between the pressure relief pipe 250 and the sleeve 210.

[0046] It should be noted that, in order to improve the sliding stability of the slip ring 220, that is, to ensure that the slip ring 220 can stably drive the positioning member 240 to slide to align with the positioning hole 212, the pressure relief pipe 250 is installed at the end of the sleeve 210 away from the blasting pipe 100. For example, the connection between the pressure relief pipe 250 and the sleeve 210 is also a screwed structure. Further, a pressure relief piece 260 is installed between the pressure relief pipe 250 and the sleeve 210. In one embodiment, the pressure relief piece 260 and the bursting piece 230 have the same structure. Thus, under the action of the bursting piece 230 and the pressure relief piece 260, the pressure relief chamber 211 is formed into a relatively closed space. When the liquid carbon dioxide in the liquid storage chamber 110 is vaporized, the air pressure first breaks through the bursting piece 230 to enter the pressure relief chamber 211. When the air pressure acts on the pressure relief piece 260, it also acts on the slip ring 220, so that the positioning hole 212 can stably protrude from the positioning hole 212.

[0047] As Figure 4 shown, in one embodiment, a pressure relief hole 251 is formed in the side wall of the pressure relief pipe 250. Thus, forming the pressure relief hole 251 in the side wall of the pressure relief pipe 250 can enable the gaseous carbon dioxide to be released from the pressure relief hole 251 to form high pressure.

[0048] As Figures 1 to 3 shown, in one embodiment, a through hole 213 is further formed in the side wall of the sleeve 210. It should be noted that in an embodiment without installing the pressure relief pipe 250, in order to enable the gaseous carbon dioxide to better apply a blasting force to the rock mass, the through hole 213 is formed in the side wall of the sleeve 210. When the bursting piece 230 ruptures, the air pressure can be released through the through hole 213.

[0049] As Figures 1 to 5 shown, in one embodiment, the positioning member 240 includes a clamping post 241 and a positioning spring 242. The clamping post 241 is slidably disposed on the slip ring 220, and the positioning spring 242 is abutted against the clamping post 241 and the slip ring 220 respectively. The positioning spring 242 is used to push the clamping post 241 so that the clamping post 241 has a tendency to move radially away from the axis.

[0050] It should be noted that the clamping member 240 is used to extend from the clamping hole 212 to clamp the rock slag. Specifically, the clamping post 241 is slidably mounted on the sliding ring 220 along the radial direction of the sliding ring 220, so that the clamping post 241 can slide closer to or away from the axis of the sliding ring 220 along the radial direction. The clamping spring 242 is respectively abutted against the clamping post 241 and the sliding ring 220. Under the elastic thrust of the clamping spring 242, the clamping post 241 has a tendency to move away from the axis of the sliding ring 220 along the radial direction. Thus, in the natural state, the clamping post 241 is held by the inner wall of the pressure relief cavity 211. When the sliding ring 220 slides coaxially in the pressure relief cavity 211 until the clamping post 241 is aligned with the clamping hole 212, the clamping post 241 penetrates out of the clamping hole 212 under the elastic thrust of the clamping spring 242. In this way, the carbon dioxide blasting device 10 for rock mass is clamped by the rock slag, effectively avoiding the problem of flying pipes.

[0051] As Figure 5 shown, in one embodiment, the sliding ring 220 is axially provided with a sliding groove 221, and the clamping post 241 is slidably disposed in the sliding groove 221.

[0052] It should be noted that in order to enable the clamping post 241 to slide stably relative to the sliding ring 220, a sliding groove 221 distributed along the radial direction is opened on the sliding ring 220, so that the clamping post 241 slides in the sliding groove 221.

[0053] In one embodiment, the cross section of the clamping post 241 is a T-shaped structure. Further, the clamping post 241 and the sliding groove 221 are of a matching structure, so the cross section of the sliding groove 221 is also a T-shaped structure.

[0054] In one embodiment, a plurality of clamping members 240 are provided, and each clamping member 240 is slidably disposed on the sliding ring 220 in a circumferential manner.

[0055] It should be noted that in order to improve the clamping of the rock slag on the clamping member 240 to avoid the problem of flying pipes, a plurality of clamping members 240 are provided, so that the clamping members 240 are circumferentially distributed on the sliding ring 220. In one embodiment, the clamping members 240 are set to four, and the angle between any two adjacent clamping members 240 and the axis of the sliding ring 220 is 90 degrees.

[0056] As Figures 6 to 8 shown, in one embodiment, the carbon dioxide blasting device 10 for rock mass further includes an ejection rod 400. The ejection rod 400 passes through the blasting pipe 100. An inclined pushing surface 410 is provided at the bottom end of the ejection rod 400. When the ejection rod 400 slides closer to the clamping post 241, the inclined pushing surface 410 pushes against the inner wall of the avoidance groove 241a of the clamping post 241, so that the clamping post 241 compresses the clamping spring 242, and further the clamping post 241 retracts into the sleeve 210.

[0057] It should be noted that, in order to facilitate the recovery of the carbon dioxide blasting device 10 for rock masses, that is, after blasting, the pipes can be quickly retracted without waiting for the rock slag to be cleared before retracting the pipes. Therefore, the above structure is provided. Specifically, a through hole is opened in the blasting pipe 100 in a direction parallel to the axis, and the withdrawal rod 400 is passed through the through hole so that the bottom end of the withdrawal rod 400 is close to the clamping post 241. In one embodiment, during transportation or blasting, in order to ensure the stability of the withdrawal rod 400, the withdrawal rod 400 can be locked and fixed by screws. By providing a locking boss 120 at the top of the blasting pipe 100 and then screwing the screws into the locking boss 120, the screws are made to abut and fix the withdrawal rod 400. Further, after blasting is completed, in order to enable the carbon dioxide blasting device 10 for rock masses to be smoothly retracted from the slag, it is necessary to first retract each clamping post 241 into the sleeve 210. Specifically, an inclined pushing surface 410 is provided at the bottom end of the withdrawal rod 400, and an avoidance groove 241a is opened in the clamping post 241. After loosening the screws fixing the withdrawal rod 400, the withdrawal rod 400 is pushed close to the clamping post 241 so that the inclined pushing surface 410 abuts and presses the inner side wall of the avoidance groove 241a, so that the clamping spring 242 is compressed, and then the clamping post 241 is retracted into the sleeve 210. In this way, the carbon dioxide blasting device 10 for rock masses can be smoothly taken out from the crushed slag. Further, in one embodiment, a plurality of withdrawal rods 400 are provided so that each withdrawal rod 400 corresponds to each clamping post 241 one by one.

[0058] As Figure 9 shown, in one embodiment, the blasting assembly 200 further includes a seal 270, and the seal 270 is disposed between the bursting disc 230 and the blasting pipe 100.

[0059] It should be noted that, in order to prevent liquid carbon dioxide from overflowing from the liquid storage cavity 110, the seal 270 is installed to eliminate the gap between the bursting disc 230 and the blasting pipe 100. In one embodiment, the seal 270 is made of a silica gel structure. In one embodiment, the bursting disc 230 is fixed to the blasting pipe 100 by screwing a screw cap 280. Specifically, the screw cap 280 is screwed and fixed to the lower end of the blasting pipe 100 so that the screw cap 280 and the blasting pipe 100 jointly clamp the bursting disc 230, thereby sealing the liquid storage cavity 110 with the bursting disc 230.

[0060] As Figure 9 shown, in one embodiment, the seal 270 includes a main body portion 271 and two protruding portions 272. The two protruding portions 272 are both provided on the main body portion 271, and one of the protruding portions 272 abuts against the bursting disc 230, and the other protruding portion 272 abuts against the inner side wall of the liquid storage cavity 110.

[0061] In this way, under the action of the cap 280, the main body 271 is clamped and fixed by the blasting tube 100 and the bursting disc 230. When liquid carbon dioxide is injected into the liquid storage chamber 110, the liquid carbon dioxide will exert a liquid thrust on the two convex portions 272, causing the two convex portions 272 to closely fit against the inner side wall of the liquid storage chamber 110 and the bursting disc 230 respectively. In this way, the sealing performance of the liquid storage chamber 110 is effectively ensured.

[0062] As Figure 10 shown, the present application also provides a rock blasting method, which is implemented by using the carbon dioxide blasting device 10 for rock in any one of the above, and includes the following steps:

[0063] Step S11: Inject liquid carbon dioxide into the liquid storage chamber 110 to obtain an injection blasting device. For example, inject liquid carbon dioxide into the liquid storage chamber 110 through the injection hole to complete the inflation process.

[0064] Step S12: Drill a blast hole on the rock body at a preset distance from the free face. The diameter of the blast hole is A1, and the diameter of the blasting tube is A2, where the range of A1 - A2 is 5 mm to 12 mm. In one embodiment, the range of the preset distance value is 0.8 m to 1.5 m. For example, the preset distance value can also be 0.9 m (meter), or 1 m (meter), or 1.2 m (meter), etc. Further, in one embodiment, the blast hole is a cylindrical hole structure, and its diameter A1 is larger than the diameter of the blasting tube A2, and A1 and A2 satisfy the following relationship: 5 mm < A1 - A2 < 12 mm (unit: millimeter). In this way, the injection blasting device can be smoothly installed in the blast hole. A1 - A2 can also be 6 mm (millimeter), or 8 mm (millimeter), or 10 mm (millimeter), etc. Further, in one embodiment, multiple blast holes can be drilled, and then an injection blasting device is placed in each blast hole.

[0065] Step S13: Place the injection blasting device into the blast hole.

[0066] Step S14: Use sand to fill the gap between the injection blasting device and the blast hole. Specifically, after placing the injection blasting device into the blast hole, fill the gap between the injection blasting device and the blast hole with sand. It should be noted that the top of the injection blasting device needs to be exposed outside the ground surface.

[0067] Step S15: Connect the heating rod and the detonator with a wire. Specifically, electrically connect the heating rod 300 and the detonator with a metal wire. In one embodiment, when multiple blast holes are provided, use a metal wire to electrically connect the heating rod 300 in each blast hole to the detonator.

[0068] Step S16: Press the detonator to send a detonation electrical signal to the heating rod 300. Specifically, send a detonation electrical signal to the heating rod to cause the heating rod 300 to generate heat, thereby vaporizing the liquid carbon dioxide in the liquid storage cavity 110. Eventually, during the vaporization process of the liquid carbon dioxide, the volume expands by 600 to 1000 times, so that the rock mass is fractured under pressure. Among them, during the expansion process, carbon dioxide will push the sliding ring 220 to move, so that at least part of the structure of the clamping member 240 extends out of the clamping hole 212, and the clamping member 240 abuts against the inner wall of the blast hole. With the occurrence of blasting, the rock mass is fragmented into slag, and the slag is used to clamp the clamping member 240. Therefore, it can effectively avoid the problem of the blasting pipe 100 flying out of the blast hole, i.e., the flying pipe problem.

[0069] The above-described embodiments merely represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent shall be subject to the appended claims.

Claims

1. A carbon dioxide blasting device for rock mass, characterized in that, Comprising: A blasting tube, within which a liquid storage cavity is formed, and a heating rod is provided on the top wall of the liquid storage cavity; And A blasting assembly, which includes a sleeve, a slip ring, a bursting disc, and a positioning member. The sleeve is arranged at the bottom of the blasting tube. The sleeve is provided with a pressure relief cavity and a positioning hole that communicate with each other. The bursting disc is arranged between the sleeve and the blasting tube, so that the bursting disc separates the liquid storage cavity and the pressure relief cavity. The slip ring is slidably arranged in the pressure relief cavity. The positioning member includes a clamping column and a positioning spring. The clamping column is slidably arranged on the slip ring. The positioning spring abuts against the clamping column and the slip ring respectively. The positioning spring is used to push the clamping column, so that the clamping column has a tendency to move radially away from the axis; When the liquid carbon dioxide in the liquid storage cavity breaks through the bursting disc and vaporizes, the gaseous carbon dioxide pushes the slip ring to slide, and then at least part of the positioning member extends out of the positioning hole.

2. The carbon dioxide blasting device for rock mass according to claim 1, characterized in that, The structure between the sleeve and the blasting tube is a screwed connection structure.

3. The carbon dioxide blasting device for rock mass according to claim 1, characterized in that, The blasting assembly further includes a pressure relief pipe and a pressure relief piece. The pressure relief pipe is arranged at the end of the sleeve away from the blasting tube, and the pressure relief piece is arranged between the pressure relief pipe and the sleeve.

4. The carbon dioxide blasting device for rock mass according to claim 3, characterized in that, A pressure relief hole is formed on the side wall of the pressure relief pipe.

5. The carbon dioxide blasting device for rock mass according to claim 1, characterized in that, A through hole is further formed on the side wall of the sleeve.

6. The carbon dioxide blasting device for rock mass according to claim 1, characterized in that, The cross section of the clamping column is a T-shaped structure.

7. The carbon dioxide blasting device for rock mass according to claim 1, wherein, The slip ring is provided with a chute along the axial direction, and the clamping column is slidably arranged in the chute.

8. The carbon dioxide blasting device for rock mass according to claim 1, wherein, A plurality of the positioning members are provided, and each of the positioning members is slidably arranged on the slip ring in a circumferential manner.

9. A rock blasting method is implemented by using the carbon dioxide blasting device for rock mass described in any one of claims 1 to 8, characterized in that, Including the following steps: Step S11: Inject liquid carbon dioxide into the liquid storage cavity to obtain an injection-type blasting device; Step S12: Drill a blast hole on the rock mass at a preset distance from the free face. The diameter of the blast hole is A1, and the diameter of the blasting tube is A2, where the range of A1 - A2 is 5 mm to 12 mm; Step S13: Place the injection-type blasting device into the blast hole; Step S14: Use sand to fill the gap between the injection-type blasting device and the blast hole; Step S15: Connect the heating rod to the detonator by using a wire; Step S16: Press the detonator to send a detonation electrical signal to the heating rod.

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