Protective device for carbon dioxide phase change cracking broken rock
By filling the fracturing hole with material and bamboo mats to disperse the vibration force, and combining it with a multi-layer protective structure, the problem of rocks flying out when the carbon dioxide phase change fracturing device breaks rocks was solved, ensuring construction safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-29
- Publication Date
- 2026-03-31
AI Technical Summary
Carbon dioxide phase change fracturing devices are prone to ejecting rock fragments when fracturing rocks, posing a threat to construction safety.
The cracks were filled with packing material, and the vibration force was dispersed by bamboo mats. In addition, a multi-layered protective structure, including sandbags, isolation boards, bamboo frames, protective layers, and isolation nets, was used to cover and disperse the flying stones.
This effectively prevented stones from flying out, ensured construction safety, and protected the diaphragm wall and surrounding facilities.
Smart Images
Figure CN224066023U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of blasting protection technology, and in particular to a protective device for rock fracture caused by carbon dioxide phase transformation. Background Technology
[0002] Carbon dioxide phase change fracturing is a blasting technique that utilizes the volume expansion that occurs during the rapid phase change of liquid carbon dioxide into a gaseous state. This expansion pressure, under the constraint of a blast hole, causes fracturing and displaces rock-like media. This technology plays a crucial role in municipal engineering projects such as subway excavation and tunnel boring. However, when using carbon dioxide phase change fracturing devices to break rocks, fragments can fly out, potentially compromising construction safety and posing a serious threat to the safety of surrounding equipment, facilities, and personnel. Utility Model Content
[0003] This utility model provides a protective device for fracturing rocks using carbon dioxide phase change fracturing, which solves the defect of existing carbon dioxide phase change fracturing devices that easily cause rocks to fly out during rock fracturing, thereby preventing rocks from flying out and ensuring construction safety.
[0004] This utility model provides a protective device for fracturing rocks by carbon dioxide phase change, including multiple fracturing holes spaced apart on the rock of the foundation pit, at least one fracturing tube is embedded in each fracturing hole, and a filling material is placed above each fracturing tube and the filling material is located in the corresponding fracturing hole. The multiple fracturing holes are covered with bamboo mats and the bamboo mats are placed on the support beam of the foundation pit.
[0005] According to the protective device for carbon dioxide phase change fracturing and rock breaking according to this utility model, the setting of the filling material can prevent the fracturing tube from flying out when it is fracturing and breaking rocks in the fracturing hole. The setting of the bamboo mat can use the good toughness of the bamboo mat to disperse the vibration force of rock fracturing, thereby preventing the continuous wall from being disturbed, and covering the flying rocks to prevent them from flying out, thus ensuring construction safety.
[0006] In addition, the protective device for fracturing rocks caused by carbon dioxide phase transformation according to this utility model may also have the following additional technical features:
[0007] In some embodiments of this utility model, a blanket is also included, with the bamboo mat having a blanket on the side facing away from the support beam of the foundation pit.
[0008] By adopting the above embodiments, the blanket can cover the small rocks that fly out when the rock cracks, thus preventing the small rocks from flying out.
[0009] In some embodiments of this utility model, multiple sandbags are also included, all of which are laid on bamboo mats.
[0010] By adopting the above embodiments, the setting of multiple sandbags can provide secondary protection for phase transformation-induced fractured rocks. The sand inside the sandbags disperses the vibration and impact forces of rock fracture, thereby reducing the probability of rocks flying out.
[0011] In some embodiments of this invention, a partition plate is also included, which covers multiple sandbags.
[0012] By adopting the above embodiments, the isolation plate can protect the fracture holes and fractured rocks, further reducing the probability of stones flying out.
[0013] In some embodiments of this utility model, the bamboo fence includes multiple bamboo frame boards and steel pipes. The multiple bamboo frame boards are connected by steel pipes, and the multiple bamboo frame boards cover the multiple crack holes and are set on the crossbeam of the foundation pit.
[0014] By adopting the above embodiments, the arrangement of multiple bamboo frames and steel pipes achieves complete coverage of the blasting zone, thereby minimizing the occurrence of flying rocks when the rock cracks.
[0015] In some embodiments of this utility model, a protective layer is also included, wherein a protective layer is provided between the cracked hole and the continuous wall.
[0016] By adopting the above embodiments, the protective layer can prevent vibration interference in the continuous wall, thereby protecting the stability of the continuous wall.
[0017] In some embodiments of this utility model, an isolation net is also included, which covers the isolation plate and is connected to the rock in the foundation pit.
[0018] By adopting the above embodiments, the installation of the isolation net can prevent the isolation plate or sandbag from being blown away by the large impact force when the rock cracks, while also reducing vibration.
[0019] In some embodiments of this utility model, it also includes connecting steel bars and anchoring steel bars, with the anchoring steel bars set on the surface of the foundation pit rock, and the isolation net connected to the anchoring steel bars through the connecting steel bars.
[0020] In some embodiments of this utility model, the isolation plate is either a steel plate or a gun shell.
[0021] In some embodiments of this invention, the filling material is made of angular crushed stone.
[0022] By adopting the above embodiments, since the size of the crushed stone particles is between 5mm and 20mm, the small size can fill the cracking pores tightly, ensuring the cracking effect.
[0023] In summary, this application includes at least the following beneficial technical effects: the use of filling material can prevent the fracturing tube from flying out when it is fracturing and breaking rocks in the fracturing hole; the use of bamboo mats can utilize the good toughness of bamboo mats to disperse the vibration force of rock fracturing, thereby preventing the continuous wall from being disturbed, while covering the flying rocks to prevent them from flying out, thus ensuring construction safety. Attached Figure Description
[0024] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:
[0025] Figure 1 A perspective view schematically illustrates a protective device for fracturing rocks caused by carbon dioxide phase change according to some embodiments of the present invention.
[0026] Figure 2 A cross-sectional view schematically illustrates a protective device for fracturing rocks caused by carbon dioxide phase change according to some embodiments of the present invention.
[0027] Figure 3 A perspective view of a bamboo mat used as a protective device for fracturing rocks caused by carbon dioxide phase change according to some embodiments of the present invention is shown schematically.
[0028] Figure 4 A schematic cross-sectional view of a bamboo mat used as a protective device for fracturing rocks caused by carbon dioxide phase change according to some embodiments of the present invention is shown.
[0029] Figure 5 A schematic plan view of a bamboo mat used as a protective device for fracturing rocks caused by carbon dioxide phase change according to some embodiments of the present invention is shown.
[0030] Figure label:
[0031] 1. Excavation pit rock, 2. Fracturing holes, 3. Filling material, 4. Steel pipe, 5. Blanket, 6. Sandbag, 7. Isolation board, 8. Connecting steel bars, 9. Bamboo frame board, 10. Isolation net, 11. Continuous wall, 12. Anchoring steel bars, 13. Protective layer. Detailed Implementation
[0032] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
[0033] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “” used herein may also indicate the inclusion of the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated, unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.
[0034] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.
[0035] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may also be rotated 90 degrees or in other orientations, and the spatial relative descriptors used in the text will be interpreted accordingly.
[0036] like Figures 1 to 5 As shown, according to an embodiment of the first aspect of the present invention, a protective device for fracturing rocks by carbon dioxide phase change is proposed, comprising a plurality of fracturing holes 2 spaced apart on the rock 1 of the foundation pit, at least one fracturing hole 2 is embedded in a fracturing tube, a filling material 3 is provided above each fracturing tube and the filling material 3 is located in the corresponding fracturing hole 2, and bamboo mats are covered above the plurality of fracturing holes 2 and the bamboo mats are placed on the support beam of the foundation pit.
[0037] In the above embodiments, it should be noted that the support beam of the foundation pit refers to a steel structure beam used during the excavation of the foundation pit in order to protect the safety of the foundation pit slope and the surrounding environment.
[0038] The bamboo mats are connected to the supporting beams of the foundation pit by binding with steel bars or by anchoring steel bars.
[0039] The technical effects achieved by the above embodiments are as follows: by setting the filling material 3, the fracturing tube can be prevented from flying out when it is working to break rocks in the fracturing hole 2. By setting the bamboo mat, the good toughness of the bamboo mat can be used to disperse the vibration force of rock fracturing, thereby preventing the continuous wall 11 from being disturbed, while covering the flying stones to prevent them from flying out, thus ensuring construction safety.
[0040] Optional, such as Figures 1 to 5 As shown, it also includes a blanket 5, which is installed on the side of the bamboo mat away from the support beam of the foundation pit.
[0041] In the above optional embodiments, it should be noted that the blanket 5 and the bamboo mat are connected by binding or adhesive.
[0042] The beneficial effect of the above optional embodiments is that the blanket 5 can cover the small rocks that fly out when the rock cracks, thus preventing the small rocks from flying out.
[0043] Optional, such as Figure 1 and Figure 2 As shown, it also includes multiple sandbags 6, all of which are laid on bamboo mats.
[0044] It also includes a barrier panel 7, which covers multiple sandbags 6.
[0045] In the above optional embodiments, it should be noted that when the fracturing holes 2 are filled by deep-buried fracturing pipes, the length of the filling material 3 on each fracturing hole 2 is greater than 2.5 meters. After the isolation plate 7 is covered on multiple sandbags 6, it is connected to the support beam of the foundation pit by steel bars or steel wires.
[0046] The beneficial effects of the above optional embodiments are as follows: by setting up multiple sandbags 6, secondary protection can be provided for phase transformation fractured rocks. The sand in the sandbags 6 can be used to disperse the vibration and impact forces of rock fracture, thereby reducing the probability of rocks flying out.
[0047] The installation of isolation plate 7 provides a third layer of protection for the crack-causing hole 2 and the crack-causing rock, further reducing the probability of flying rocks. The combination of bamboo mats, isolation plate 7, and sandbags 6 forms a triple protection system to ensure no flying rocks occur when the rock cracks, thus ensuring construction safety.
[0048] Optional, such as Figures 1 to 5 As shown, the bamboo fence includes multiple bamboo frame boards 9 and steel pipes 4. The multiple bamboo frame boards 9 are connected by steel pipes 4. The multiple bamboo frame boards 9 cover the multiple crack holes 2 and are set on the crossbeam of the foundation pit.
[0049] In the above optional embodiments, it should be noted that multiple bamboo frame boards 9 are arranged and combined to form a width of 3m and a length of 2m, and then tied and fixed with two steel pipes 4 to be used as a whole protective material. During blasting, the bamboo mats are laid manually on the crossbeams of the foundation pit, from the edge of the foundation pit to the center of the foundation pit, until the area above the area to be blasted is completely covered. Finally, a layer of carpet is laid on top of the bamboo frame boards 9 to prevent small flying stones from flying out of the foundation pit.
[0050] When the fracturing tubes are installed by deep burial, a filling length of more than 2.5m is guaranteed above each fracturing hole 2, and the filling material is compacted with a vibrator.
[0051] The beneficial effects of the above optional embodiments are as follows: by setting up multiple bamboo frame boards 9 in conjunction with steel pipes 4, the blasting zone is fully covered, thereby greatly avoiding the occurrence of flying rocks when the rock is cracked.
[0052] Optional, such as Figure 1 and Figure 2 As shown, it also includes a protective layer 13, which is provided between the crack 2 and the continuous wall 11.
[0053] In the above optional embodiments, it should be noted that the protective layer 13 is a rock layer and the thickness of the protective layer 13 is greater than 1.5 meters.
[0054] The advantages of the above optional embodiments are: the protective layer 13 can prevent vibration interference in the continuous wall 11, thereby protecting the stability of the continuous wall 11.
[0055] Optional, such as Figure 1 and Figure 2 As shown, it also includes an isolation net 10, which covers the isolation plate 7 and is connected to the foundation pit rock 1. It also includes connecting steel bars 8 and anchoring steel bars 12, which are set on the surface of the foundation pit rock 1, and the isolation net 10 is connected to the anchoring steel bars 12 through the connecting steel bars 8.
[0056] Optional, such as Figure 1 and Figure 2 As shown, the isolation plate 7 is either a steel plate or a gun shell.
[0057] In the above optional embodiments, it should be noted that the connecting steel bar 8 and the anchoring steel bar 12 are connected by binding, and the anchoring steel bar 12 and the foundation pit rock 1 are connected by concrete filling.
[0058] The advantages of the above optional embodiments are: by setting the isolation net 10, the isolation plate 7 or sandbag 6 can be prevented from flying off due to large impact force when the rock cracks, while also reducing vibration.
[0059] Optional, such as Figure 1 and Figure 2 As shown, filler 3 is made of angular crushed stone.
[0060] In the above optional embodiments, it should be noted that when the filling method is used to install the pipe with the lifting rod connected, the exposed length A of the lifting rod after filling is 0.3≦A≦0.5m.
[0061] The filler material 3 consists of sharp-edged crushed stone particles, which are piled around the fracturing hole. The filler material is then slowly placed into the fracturing hole while the exposed lifting rod is tapped to facilitate settling and compaction. Alternatively, a handheld vibrator can be used to improve filling efficiency.
[0062] When using a deep-buried pipe without the need for a lifting rod, the filling length of the filling material 3 shall not be less than 2.5m. The filling particles 3 shall be sharp-edged crushed stone particles, which shall be piled around the fracturing hole 2. After the fracturing device is installed in the fracturing hole 2, the filling material 3 shall be slowly put into the fracturing hole 2, so that the filling material 3 fills the gap between the fracturing pipe and the fracturing hole 2. Finally, the filling shall continue until the opening of the fracturing hole 2 is reached, and it shall be compacted with a vibrator. The filling material 3 shall not contain crushed stone or damp stone chips, and the filling material 3 shall not contain moisture.
[0063] This is because when there is water inside the fracturing hole 2, mud or voids are easily formed during the filling process, making it impossible to fill the area around the fracturing device tightly. This results in poor fracturing effect and may even cause the fracturing device to fly out of the air.
[0064] The advantages of the above optional embodiments are: since the size of the crushed stone particles is between 5mm and 20mm, the size is small, which can fill the cracking holes 2 tightly and ensure the cracking effect.
[0065] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A protection device for carbon dioxide phase transition induced fracturing of rock, characterized in that, It includes multiple cracking holes (2) which are spaced apart on the foundation pit rock (1), at least one of the cracking holes (2) is buried with a cracking pipe, the upper part of each cracking pipe is provided with a filling material (3) and the filling material (3) is located in the corresponding cracking hole (2), the upper part of multiple cracking holes (2) is covered with a bamboo screen and the bamboo screen is arranged on the support beam of the foundation pit.
2. The carbon dioxide phase transformation induced cracking rock breaking protection device according to claim 1, characterized in that, It also includes a blanket (5), the side of the bamboo screen away from the support beam of the foundation pit is provided with the blanket (5).
3. The carbon dioxide phase transition induced fracture rock breaking protection device according to claim 1, characterized in that, It also includes multiple sandbags (6), multiple sandbags (6) are laid on the bamboo screen.
4. The carbon dioxide phase transformation induced cracking rock breaking protection device according to claim 3, characterized in that, It also includes an isolation plate (7), the isolation plate (7) covers multiple sandbags (6).
5. The carbon dioxide phase transformation induced fracture rock breaking protection device according to claim 1, characterized in that, The bamboo screen includes multiple bamboo frame plates (9) and steel pipes (4), multiple bamboo frame plates (9) are connected through the steel pipes (4), and multiple bamboo frame plates (9) correspondingly cover the upper part of multiple cracking holes (2) and are arranged on the cross beam of the foundation pit.
6. The apparatus of any one of claims 1 to 5, wherein the apparatus is configured to be used in conjunction with a drill string, and wherein the apparatus is configured to be positioned within the drill string. It also includes a protective layer (13), the protective layer (13) is arranged between the cracking hole (2) and the continuous wall (11).
7. The apparatus of claim 4, wherein: It also includes an isolation net (10), the isolation net (10) covers the upper part of the isolation plate (7) and is connected with the foundation pit rock (1).
8. The carbon dioxide phase transformation induced fracture rock breaking protection device according to claim 7, characterized in that, It also includes a connecting steel bar (8) and an anchoring steel bar (12), the anchoring steel bar (12) is arranged on the surface of the foundation pit rock (1), and the isolation net (10) is connected with the anchoring steel bar (12) through the connecting steel bar (8).
9. The carbon dioxide phase transformation induced fracture rock breaking protection device according to claim 4, characterized in that, The isolation plate (7) is one of a steel plate or a cannon.
10. The carbon dioxide phase transition induced fracture rock breaking protection device according to claim 1, characterized in that, The filling material (3) is made of angular crushed stone.