A blasting and cracking pipe device and a blasting method thereof

Abstract

The application provides a blasting fracturing pipe device and a blasting method thereof, which comprises an ignition wire assembly and a blasting fracturing pipe body inserted into a blast hole, wherein the blasting fracturing pipe body is provided with a rigid inner pipe and a soft protective sleeve wrapped on the outer peripheral wall of the rigid inner pipe; one end of the rigid inner pipe is in a closed state, a one-way air outlet valve is arranged on the outer peripheral wall of the rigid inner pipe, an opening is arranged on the other end of the rigid inner pipe, a sealing structure is arranged on the opening, a one-way filling valve is arranged on the sealing structure, the part of the ignition wire assembly outside the one-way filling valve is tightly arranged through the sealing structure and extends into the inner part of the rigid inner pipe; an exhaust channel is arranged in the soft protective sleeve and is in communication with the one-way air outlet valve, the exhaust channel extends along the axis direction of the rigid inner pipe, and a one-way exhaust valve is arranged on the end face of the soft protective sleeve corresponding to the one-way filling valve and is in communication with the exhaust channel, so that the device can be used under any blast hole inclination angle and the application range of construction blasting is expanded.

Description

Technical Field

[0001] This invention relates to the field of engineering blasting and blasting materials, and in particular to a blasting fracturing tube device and its blasting method. Background Technology

[0002] Blasting is a highly efficient, rapid, and convenient method of rock breaking, widely used in mining, infrastructure, and earthmoving industries. However, the production, transportation, storage, use, and disposal of traditional explosives present numerous hidden dangers and pollution issues, and regulatory and environmental restrictions in some regions limit their application. Liquefied air blasting is a new, efficient, and pollution-free blasting method. Compared to traditional carbon dioxide blasting, liquefied air blasting requires simpler material sources, does not involve hazardous chemicals in its production and use, has a much lower production cost than traditional explosive blasting, and produces a much greater explosive force. However, existing liquefied air blasting methods are only suitable for open-pit earthmoving blasting, and their application is limited by technology and equipment. Summary of the Invention

[0003] The purpose of this invention is to provide a blasting and fracturing tube device and its blasting method to solve the problems existing in the prior art, so that it can be used under any borehole inclination angle, thus expanding the application range of construction blasting.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention provides a blasting fracturing tube device, including an ignition wire assembly and a blasting fracturing tube body inserted into a blast hole, wherein the blasting fracturing tube body is provided with a rigid inner tube and a soft protective sleeve covering the outer peripheral wall of the rigid inner tube;

[0005] One end of the rigid inner tube is closed, and an exhaust one-way valve is provided on its outer peripheral wall. The other end of the rigid inner tube has an opening, and a sealing structure is provided at the opening. A filling one-way valve is provided on the sealing structure. The ignition wire assembly passes tightly through the part of the sealing structure located outside the filling one-way valve and extends into the interior of the rigid inner tube.

[0006] The soft protective sleeve has an exhaust channel that communicates with the exhaust one-way valve. The exhaust channel extends along the axial direction of the rigid inner tube. The soft protective sleeve has an exhaust one-way valve that communicates with the exhaust channel on the end face corresponding to the filling one-way valve.

[0007] Preferably, the rigid inner tube is provided with a plurality of one-way valves for venting air, and the one-way valves for venting air are distributed at equal intervals along the circumference of the rigid inner tube.

[0008] Preferably, the soft protective sleeve has multiple exhaust channels, each of which is equally spaced along the circumference of the rigid inner tube and is connected to each of the exhaust one-way valves.

[0009] Preferably, the soft protective sleeve has a plurality of exhaust one-way valves on the end face corresponding to the filling one-way valve. Each exhaust one-way valve is evenly distributed along the circumference of the rigid inner tube and is connected to each exhaust channel.

[0010] Preferably, the closed end of the rigid inner tube is connected to a protective base.

[0011] Preferably, the structure of the protective base matches the end face structure of the closed end of the rigid inner tube and covers the end face of the closed end of the rigid inner tube.

[0012] Preferably, the ignition wire assembly includes at least two electronic ignition wires that are tightly passed through the sealing structure. The portion of the electronic ignition wire located outside the rigid inner tube is connected to an initiator. The portion of the electronic ignition wire located inside the rigid inner tube is provided with multiple ignition heads, and each ignition head is evenly distributed along the direction of extension of the electronic ignition wire.

[0013] Preferably, each of the ignition heads is wrapped with a paper absorption ring on its outer periphery.

[0014] Preferably, each of the electronic ignition wires is distributed at equal intervals along the circumference of the rigid inner tube and surrounds the outer periphery of the filling check valve.

[0015] A demolition method is also provided, comprising the following steps:

[0016] S1. According to the design blasting scheme, process the mold for making the rigid inner tube and the soft protective sleeve, and use the corresponding mold to make the rigid inner tube and the soft protective sleeve respectively, and prepare the electronic ignition wire, paper absorption ring, filling one-way valve, exhaust one-way valve and exhaust one-way valve.

[0017] S2. Drilling is carried out at the required construction site according to the designed blasting plan, and blasting holes are made. The diameter and depth of the blasting holes are both greater than the soft protective sleeve.

[0018] S3. Transport the various parts of the prepared and ready blasting tube body to the site for assembly.

[0019] S4. Fill the rigid inner tube with colored gas according to its volume and check the sealing performance;

[0020] S5. The compressed liquefied air is filled through the filling check valve until the colored gas is completely discharged and then the process is stopped.

[0021] S6. Connect the electronic ignition wire to the detonation network, set the segmented detonation time in the borehole, and start the detonator to break the rock.

[0022] The present invention achieves the following technical effects compared to the prior art:

[0023] This invention provides a blasting and fracturing tube device. Whether the rigid inner tube is being filled with colored gas via a filling check valve during airtightness testing, or with liquefied air via a filling check valve before blasting, the gas in the rigid inner tube can be discharged sequentially through an outlet check valve, an exhaust channel, and an exhaust check valve. Because each check valve restricts unidirectional fluid flow, the rigid inner tube can be filled with liquefied air at any angle, preventing backflow or incomplete filling during the process. This allows the rigid inner tube to be blasted at any angle, unaffected by the required rock-breaking angle, thus expanding the application range of liquefied air blasting. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the entire blasting and fracturing tube device of the present invention;

[0026] Figure 2 This is a schematic diagram of the exhaust system of the entire blasting and fracturing tube device of the present invention;

[0027] Figure 3 This is a schematic diagram of the end face structure of the entire blasting and fracturing tube device of the present invention;

[0028] Among them, 1-rigid inner tube, 2-electronic ignition wire, 3-paper absorption ring, 4-filling one-way valve, 5-exhaust one-way valve, 6-exhaust one-way valve, 7-soft protective sleeve, 8-protective base. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] The purpose of this invention is to provide a blasting and fracturing tube device and its blasting method to solve the problems existing in the prior art, so that it can be used under any borehole inclination angle, thus expanding the application range of construction blasting.

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] like Figures 1 to 3 As shown, this embodiment provides a blasting fracturing tube device, including an ignition wire assembly and a blasting fracturing tube body inserted into a blast hole. The blasting fracturing tube body is provided with a rigid inner tube 1 and a soft protective sleeve 7 covering the outer peripheral wall of the rigid inner tube 1. Preferably, the rigid inner tube 1 is an injection-molded cylindrical shell plastic structure with a certain rigidity and strength, and its interior is used to fill liquefied air.

[0033] One end of the rigid inner tube 1 is closed, and an exhaust one-way valve 5 is provided on its outer peripheral wall. The other end of the rigid inner tube 1 is open, and a sealing structure is sealed at the opening. A filling one-way valve 4 is provided on the sealing structure. The ignition wire assembly passes tightly through the part of the sealing structure located outside the filling one-way valve 4 and extends into the interior of the rigid inner tube 1.

[0034] The soft protective sleeve 7 has an exhaust channel that is connected to the exhaust one-way valve 5. The exhaust channel extends along the axial direction of the rigid inner tube 1. The soft protective sleeve 7 has an exhaust one-way valve 6 that is connected to the exhaust channel on the end face corresponding to the filling one-way valve 4.

[0035] The preferred soft protective sleeve 7 is made of soft rubber. The soft protective sleeve 7 is the outer protective sleeve of the rigid inner tube 1, used to protect the rigid inner tube 1. The soft protective sleeve 7 is connected to the rigid inner tube 1 through the exhaust channel and the exhaust one-way valve 5. An exhaust one-way valve 6 is provided in the exhaust section of the exhaust channel to remove the gas from the rigid inner tube 1 and the soft protective sleeve 7.

[0036] In practical use, whether the rigid inner tube 1 is filled with colored gas through the filling check valve 4 during airtightness testing, or with liquefied air before blasting through the filling check valve 4, the gas in the rigid inner tube 1 can be discharged sequentially through the exhaust check valve 5, the exhaust channel, and the exhaust check valve 6. Because each check valve restricts the unidirectional flow of fluid, the rigid inner tube 1 can be filled with liquefied air at any angle, avoiding backflow or incomplete filling during the filling process. This allows the rigid inner tube 1 to be used for blasting operations at any angle, unaffected by the required rock breaking angle, thus expanding the application range of liquefied air blasting.

[0037] Furthermore, by utilizing the blasting fracturing tube disclosed in this invention, liquefied air blasting can be achieved, which belongs to air-energy blasting technology. Since the rigid inner tube 1 can be used for blasting at any angle, the application scope of liquefied air blasting can be expanded to industries such as tunnel excavation and mining. Moreover, the rock breaking method is simple, which can reduce blasting costs and environmental pollution, and achieve explosive-free blasting. The materials and structure of the rigid inner tube 1 and soft protective sleeve 7 are simple and can be easily assembled on site, which can be used on a large scale. There are no controlled substances, and duds do not need to be dealt with. They can simply wait for the liquefied air to vaporize and be discharged. The production, construction and disposal processes are safer.

[0038] like Figure 2 The exhaust gas shown is filled through the filling check valve 4. Colored gas or liquefied air is discharged from the outlet check valve 5 at the tail of the rigid inner tube 1 into the exhaust channel of the soft protective sleeve 7, and then discharged through the exhaust check valve 6 at the head of the soft protective sleeve 7. For example... Figure 3 The diagram shows the end face of the entire blasting and fracturing tube. The soft protective sleeve 7 is slightly larger than the rigid inner tube 1 and has a certain gap. An electronic ignition wire 2 is installed at the sealing structure. Preferably, the filling check valve 4 is larger to improve the filling speed. The number of exhaust check valves 6 on the soft protective sleeve 7 and exhaust check valves 5 on the rigid inner tube 1 are adjusted according to the volume of the rigid inner tube 1 and the size of the blast hole.

[0039] In a preferred embodiment of the present invention, a plurality of one-way valves 5 are provided on the rigid inner tube 1, and the one-way valves 5 are evenly distributed around the circumference of the rigid inner tube 1. A plurality of exhaust channels are provided within the corresponding soft protective sleeve 7, and the exhaust channels are evenly distributed around the circumference of the rigid inner tube 1 and are respectively connected to each of the one-way valves 5. Furthermore, a plurality of exhaust one-way valves 6 are provided on the end face of the soft protective sleeve 7 corresponding to the filling one-way valve 4, and the exhaust one-way valves 6 are evenly distributed around the circumference of the rigid inner tube 1 and are respectively connected to each of the exhaust channels. This ensures that the colored gas or liquefied air filled into the rigid inner tube 1 can be evenly discharged into the soft protective sleeve 7 and evenly discharged along the exhaust channels on the soft protective sleeve 7.

[0040] Furthermore, a protective base 8 is connected to the closed end of the rigid inner tube 1. Preferably, the protective base 8 is a plastic base with a certain thickness. The plastic base is located at the closed end of the rigid inner tube 1 to protect the rigid inner tube 1 when it is installed into the borehole. Preferably, the structure of the protective base 8 matches the end face structure of the closed end of the rigid inner tube 1 and covers the end face of the closed end of the rigid inner tube 1, so that the protective base 8 can fully cover the end face of the rigid inner tube 1 and provide sufficient protection for it during insertion into the borehole.

[0041] In a preferred embodiment of the present invention, the ignition wire assembly includes at least two electronic ignition wires 2, both densely passing through the sealing structure. The portion of the electronic ignition wire 2 located outside the rigid inner tube 1 is connected to an initiator. The electronic ignition wire 2 is excited by an electric current. The portion of the electronic ignition wire 2 located inside the rigid inner tube 1 is provided with multiple ignition heads, which are evenly distributed along the direction of extension of the electronic ignition wire 2. By setting the electronic ignition wire 2, the ignition heads at different positions can be controlled during construction, and the ignition heads can be detonated at multiple points according to project needs, achieving micro-delay blasting inside the borehole. Furthermore, the micro-delay liquefied air blasting inside the borehole expands the application range of liquefied air blasting. Preferably, the sealing structure is manufactured by casting, and the electronic ignition wires 2 are pre-arranged during the casting process, making the electronic ignition wires 2 and the sealing structure an integral whole.

[0042] Furthermore, each ignition head is wrapped with a paper absorption ring 3 on its outer periphery. The liquefied air is absorbed by the paper absorption ring 3, and the oxygen in it mixes thoroughly with the paper absorption ring 3 and burns violently. The pressure and temperature inside the borehole rise rapidly, which promotes the rapid vaporization of the liquefied gas and achieves rock breaking.

[0043] Preferably, each electronic ignition wire 2 is evenly distributed along the circumference of the rigid inner tube 1 and surrounds the outer periphery of the filling check valve 4 to ensure the uniformity of the explosion inside the borehole, thereby ensuring the uniformity of air diffusion and improving the blasting effect.

[0044] Furthermore, a demolition method is also provided, comprising the following steps:

[0045] S1. According to the design blasting scheme, a mold for making the rigid inner tube 1 and the soft protective sleeve 7 is processed, and the rigid inner tube 1 and the soft protective sleeve 7 are made using the corresponding molds. An electronic ignition wire 2, a paper absorption ring 3, a filling one-way valve 4, an exhaust one-way valve 5, and an exhaust one-way valve 6 are also prepared. The preferred sealing structure is also made by casting. During the casting process, the electronic ignition wire 2 is arranged in the mold to ensure that the sealing structure and the electronic ignition wire 2 are tightly bonded together.

[0046] Preferably, the length of the rigid inner tube 1 is processed according to the actual transportation capacity. If the blasting hole is long according to the designed blasting scheme, the sealing structure and the protective base 8 connected to the rigid inner tube 1 are both equipped with connecting rings. In this way, during on-site assembly, the connecting rings at the beginning and end of two adjacent rigid inner tube sections 1 can be connected to extend the required length of the entire blasting fracture tube.

[0047] S2. Drill at the required construction site according to the blasting plan and make blast holes. The diameter and depth of the blast holes should be greater than 7 mm of the soft protective sleeve.

[0048] S3. Transport the various parts of the prepared and ready blasting tube body to the site for assembly.

[0049] S4. Fill the rigid inner tube 1 with colored gas according to its volume and check the sealing performance. Specifically, fill the rigid inner tube 1 and the exhaust channel with the corresponding amount of colored gas and observe and check the sealing performance. If colored gas overflows at the beginning of the filling stage, it proves that there is a leak. If a small amount of colored gas or no colored gas overflows until the last stage of filling, it proves that the sealing performance is good.

[0050] S5. The compressed liquefied air is filled through the filling check valve 4 until the colored gas is completely discharged and then the filling is stopped. Specifically, the compressed liquefied air is filled, and the filling process is monitored by whether colored gas is discharged. If colored gas is discharged during filling and the filling is stopped, it proves that the liquefied air filling is basically completed.

[0051] S6. Connect the electronic ignition wire 2 to the detonation network, set the segmented detonation time in the borehole, and start the detonator to break the rock. During the actual blasting process, the ignition head in the paper absorber ring 3 detonates and ignites the paper absorber ring 3. The paper absorber ring 3 burns rapidly, releasing a large amount of heat and gas. The liquefied air undergoes a rapid phase change, causing the borehole pressure to increase instantaneously and break through the entire blasting fracture tube to break the rock.

[0052] Any adaptive changes made according to actual needs are within the scope of protection of this invention.

[0053] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0054] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A device for blasting and fracturing a tube, characterized in that, It includes an ignition wire assembly and a blasting fracturing tube body inserted into a blast hole. The blasting fracturing tube body is provided with a rigid inner tube and a soft protective sleeve covering the outer peripheral wall of the rigid inner tube. One end of the rigid inner tube is closed, and an exhaust one-way valve is provided on its outer peripheral wall. The other end of the rigid inner tube has an opening, and a sealing structure is provided at the opening. A filling one-way valve is provided on the sealing structure. The ignition wire assembly passes tightly through the part of the sealing structure located outside the filling one-way valve and extends into the interior of the rigid inner tube. The soft protective sleeve has an exhaust channel that communicates with the exhaust one-way valve. The exhaust channel extends along the axial direction of the rigid inner tube. The soft protective sleeve has an exhaust one-way valve that communicates with the exhaust channel on the end face corresponding to the filling one-way valve.

2. The blasting fracturing tube device according to claim 1, characterized in that, The rigid inner tube is provided with a plurality of one-way valves for venting air, and the one-way valves for venting air are distributed at equal intervals along the circumference of the rigid inner tube.

3. The blasting fracturing tube device according to claim 2, characterized in that, The soft protective sleeve has multiple exhaust channels, each of which is equally spaced along the circumference of the rigid inner tube and is connected to each of the exhaust one-way valves.

4. The blasting fracturing tube device according to claim 3, characterized in that, The soft protective sleeve is provided with a plurality of exhaust one-way valves on the end face corresponding to the filling one-way valve. Each exhaust one-way valve is equally spaced along the circumference of the rigid inner tube and is connected to each exhaust channel respectively.

5. The blasting fracturing tube device according to any one of claims 2 to 4, characterized in that, The closed end of the rigid inner tube is connected to a protective base.

6. The explosive fracturing tube device according to claim 5, characterized in that, The structure of the protective base matches the end face structure of the closed end of the rigid inner tube and covers the end face of the closed end of the rigid inner tube.

7. The blasting fracturing tube device according to claim 6, characterized in that, The ignition wire assembly includes at least two electronic ignition wires that are tightly passed through the sealing structure. The portion of the electronic ignition wire located outside the rigid inner tube is connected to an initiator. The portion of the electronic ignition wire located inside the rigid inner tube is provided with multiple ignition heads, and each ignition head is evenly distributed along the direction of extension of the electronic ignition wire.

8. The blasting fracturing tube device according to claim 7, characterized in that, Each of the aforementioned ignition heads is wrapped with a paper absorption ring on its outer periphery.

9. The blasting fracturing tube device according to claim 8, characterized in that, Each of the electronic ignition wires is evenly spaced along the circumference of the rigid inner tube and surrounds the outer periphery of the filling check valve.

10. A blasting method using the blasting fracturing tube device as described in any one of claims 1 to 9, characterized in that, Includes the following steps: S1. According to the design blasting scheme, process the mold for making the rigid inner tube and the soft protective sleeve, and use the corresponding mold to make the rigid inner tube and the soft protective sleeve respectively, and prepare the electronic ignition wire, paper absorption ring, filling one-way valve, exhaust one-way valve and exhaust one-way valve. S2. Drilling is carried out at the required construction site according to the designed blasting plan, and blasting holes are made. The diameter and depth of the blasting holes are both greater than the soft protective sleeve. S3. Transport the various parts of the prepared and ready blasting tube body to the site for assembly. S4. Fill the rigid inner tube with colored gas according to its volume and check the sealing performance; S5. The compressed liquefied air is filled through the filling check valve until the colored gas is completely discharged and then the process is stopped. S6. Connect the electronic ignition wire to the detonation network, set the segmented detonation time in the borehole, and start the detonator to break the rock.

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