Protection device for liquid carbon dioxide open-air deep-hole pre-splitting detonating circuit
By using spiral sheath and fast-connecting lock protection devices on the liquid carbon dioxide open-pit deep hole pre-cracking detonation line, the problem of easy breakage of the detonation line is solved, and more efficient blasting construction is achieved.
Patent Information
- Application Number
- CN202422417827.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-10-08
AI Technical Summary
During the pre-cracking blast of liquid carbon dioxide open-pit deep holes, the detonating line lacks protection, which leads to easy breakage of the connecting line, affecting the construction process and pre-cracking effect.
A protective device including a spiral sheath, a ground fixing device and a filling head connection buckle is designed. The spiral sheath sleeve is arranged outside the detonating line and is connected by a quick connection lock buckle to protect the detonating line from being cut by external factors.
It improves the reliability of the detonating line and the stability of blasting, and improves the construction efficiency and blasting effect.
Smart Images
Figure CN223122074U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of open-pit mining, in particular to a protection device for the initiation circuit of deep-hole pre-splitting with liquid carbon dioxide in open pits. Background Technique
[0002] As an environmentally friendly green blasting technology, the liquid carbon dioxide blasting technology has been widely used in fields such as urban near-surface tunnel excavation, subway foundation pit excavation, small quarry mining, and coal seam permeability enhancement. Compared with explosive blasting, it has high safety and good rock mass fracturing ability, and has been applied to the blasting of special areas of open-pit benches, especially in the actual high-bench deep-hole pre-splitting project, giving full play to its own advantages of vibration reduction and slope protection. However, limited by factors such as the depth of pre-splitting holes and the structural parameters of the fracturing device, the construction reliability of the liquid carbon dioxide bench deep-hole pre-splitting technology is difficult to guarantee. The existing connection method of connecting the head and tail of the liquid carbon dioxide deep-hole pre-splitting in coal mines is effective for small liquid carbon dioxide fracturing devices (with a diameter less than 51 mm), but is not applicable to the larger-sized fracturing devices (with a diameter greater than 73 mm) used in liquid carbon dioxide open-pit blasting.
[0003] At present, during the construction of liquid carbon dioxide open-pit deep-hole bench pre-splitting blasting, there is no protection measure for the connecting wire extending from the blast hole of the fracturing device. During the process of placing multiple carbon dioxide fracturing devices into the pre-splitting blast hole, the initiation circuit in the hole is extremely vulnerable to breakage without external protection, resulting in the inability to initiate the carbon dioxide fracturing device. It is difficult to handle the uninitiated carbon dioxide fracturing pipes in the blast hole, delaying the construction process and affecting the pre-splitting effect. How to ensure the reliability of the initiation circuit in the carbon dioxide open-pit bench deep-hole blasting has become an urgent problem to be solved. Content of the Utility Model
[0004] The purpose of the utility model is to provide a protection device for the initiation circuit of deep-hole pre-splitting with liquid carbon dioxide in open pits, so as to solve the problems existing in the above-mentioned prior art. The structure is simple, the use is convenient, and the stability and effect of blasting are effectively improved.
[0005] To achieve the above purpose, the utility model provides the following scheme:
[0006] The present utility model provides a protection device for the initiation circuit of an open-pit deep-hole pre-fracture with liquid carbon dioxide, comprising: at least one spiral sheath, a ground fixing device and a filling head connecting buckle. The spiral sheath is used to sleeve the outside of the initiation circuit, and quick-connecting locks are arranged at both ends of the spiral sheath, and the quick-connecting locks of two adjacent spiral sheaths can be connected; the ground fixing device is used to be fixedly connected to the ground, and the quick-connecting lock of the spiral sheath can be connected to the ground fixing device; one end of the filling head connecting buckle is used to be fixedly connected to the filling head, and the other end can be connected to the quick-connecting lock of the spiral sheath.
[0007] Preferably, the spiral sheath is made of insulating material.
[0008] Preferably, the spiral sheath is made of flame-retardant material.
[0009] Preferably, the spiral sheath is made of polyethylene material.
[0010] Preferably, the density of the spiral sheath is 0.93 g / cm 3 ~0.97 g / cm 3 .
[0011] Preferably, the pitch of the spiral sheath is 5 mm to 10 mm, the diameter of the spiral line of the spiral sheath is 2 mm to 4 mm, and the overall length of the spiral sheath is 2 m, 4 m or 6 m.
[0012] Preferably, the quick-connecting lock is an "S"-shaped device.
[0013] Preferably, the ground fixing device includes an iron ring and a plurality of steel nails. The iron ring is provided with a plurality of connecting slots for connecting with the quick-connecting lock of the spiral sheath. The iron ring is provided with a plurality of nail holes, and the steel nails are used to pass through the nail holes to fix the iron ring to the ground.
[0014] Preferably, the outer diameter of the iron ring is 12 cm, the inner diameter of the iron ring is 8 cm, the thickness of the iron ring is 5 mm, the length of the steel nail is 10 cm, and the diameter of the nail hole of the iron ring is the same as the diameter of the steel nail.
[0015] The present utility model has achieved the following technical effects compared with the prior art:
[0016] The utility model provides a protection device for the initiation circuit of open-pit deep-hole pre-splitting of liquid carbon dioxide. By means of the form of a spiral coil sheath outside the circuit, through the blocking effect of the coil sheath, the coil sheath contacts the hole wall, sand and gravel, etc. prior to the initiation circuit, protecting the initiation circuit from being cut by hard and sharp external influencing factors. The setting of the quick connection buckle ensures the rapidity and convenience of connection, and ensures the convenient transportation and easy installation of the spiral sheath under the on-site construction conditions. The said invention patent greatly improves the blasting efficiency and construction efficiency of the carbon dioxide fracturing technology under the on-site application conditions. Brief Description of the Drawings
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0018] Figure 1 It is a schematic structural diagram of the protection device for the initiation circuit of open-pit deep-hole pre-splitting of liquid carbon dioxide provided by the present utility model;
[0019] Figure 2 It is a schematic structural diagram of the protection device for the initiation circuit of open-pit deep-hole pre-splitting of liquid carbon dioxide after being connected to the ground;
[0020] Figure 3 It is a schematic structural diagram of the protection device for the initiation circuit of open-pit deep-hole pre-splitting of liquid carbon dioxide after being connected to the filling head;
[0021] In the figure: 1. Spiral sheath; 2. Quick connection buckle; 3. Ground fixing device; 4. Filling head connection buckle; 5. Iron ring; 6. Steel nail; 7. Initiation circuit. Detailed Embodiment
[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.
[0023] The purpose of the present utility model is to provide a protection device for the initiation circuit of open-pit deep-hole pre-splitting of liquid carbon dioxide to solve the problems existing in the above-mentioned prior art. The structure is simple, easy to use, and effectively improves the stability and effect of blasting.
[0024] In order to make the above - mentioned objects, features and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0025] The present utility model provides a protection device for the initiation circuit 7 of open - hole deep - hole pre - cracking of liquid carbon dioxide. As Figures 1 to 3 shown, it includes: at least one spiral sheath 1, a ground fixing device 3 and a filling - head connecting buckle 4. The spiral sheath 1 is used to sleeved outside the initiation circuit 7. Quick - connection locks 2 are arranged at both ends of the spiral sheath 1, and the quick - connection locks 2 of two adjacent spiral sheaths 1 can be connected; the ground fixing device 3 is used to be fixedly connected to the ground, and the quick - connection lock 2 of the spiral sheath 1 can be connected to the ground fixing device 3; one end of the filling - head connecting buckle 4 is used to be fixedly connected to the filling head, and the other end can be connected to the quick - connection lock 2 of the spiral sheath 1. By adopting the form of a spiral - coil sheath outside the line, through the blocking effect of the coil sheath, the coil sheath contacts the hole wall, sand and gravel, etc. prior to the initiation circuit 7, protecting the initiation circuit 7 from being cut by hard and sharp external influencing factors. The setting of the quick - connection lock 2 ensures the rapidity and convenience of connection, and ensures the convenient transportation and easy installation of the spiral sheath 1 under the on - site construction conditions. The invention patent greatly improves the blasting efficiency and construction efficiency of the carbon dioxide fracturing technology under on - site application conditions.
[0026] In a preferred embodiment, the spiral sheath 1 is made of insulating material. The carbon dioxide fracturing device is entirely made of steel material. When placing the pipe body, they should not be in contact to prevent the phenomenon of short - circuit of the network. The spiral sheath 1 is a protection structure for the line and contacts the fracturing pipe body during application. Insulation is an essential property.
[0027] In a preferred embodiment, the spiral sheath 1 is made of flame - retardant material. The spiral sheath 1 is applied in the field of civil explosives, and flame - retardant materials are used to avoid safety incidents caused by gas gushing, etc.
[0028] In a preferred embodiment, the spiral sheath 1 is made of polyethylene material, in the form of a whole - section continuous spiral, and has characteristics such as wear resistance, corrosion resistance, low material density, insulation, bending flexibility, flame retardancy, and low material cost.
[0029] In a preferred embodiment, the density of the spiral sheath 1 is 0.93 g / cm3 - 0.97 g / cm3, taking into account the excellent wear resistance and the light - weight property of the material, and is suitable for the use scenarios with high physical performance requirements for outdoor operations. For the convenience of long - term storage before use, considering the long - term exposure of the sheath to sunlight, temperature changes and chemical corrosion that may exist in the wild environment, the spiral sheath 1 also has characteristics such as corrosion resistance, ultraviolet resistance, low - temperature resistance and high - temperature resistance, in order to prevent damage to the device materials caused by material aging and deterioration.
[0030] In a preferred embodiment, the pitch of the spiral sheath 1 is 5 mm to 10 mm, the diameter of the spiral line of the spiral sheath 1 is 2 mm to 4 mm, and the overall length of the spiral sheath 1 is 2 m, 4 m or 6 m. To ensure the protection performance of the spiral sheath 1 for the cable of the initiation circuit 7, the longest telescopic distance of the spiral sheath 1 should be standardized to 3.5 times the state where the sheath is not stressed. The carbon dioxide fracturing device circuit protection device, namely the spiral sheath 1, is used under multiple working conditions. The appearance of the new carbon dioxide initiation circuit 7 protection device is in the form of the spiral sheath 1, which is sleeved on the connecting cable between the initiator and the fracturing device in the internal area of the blast hole to prevent the carbon dioxide fracturing device initiation circuit 7 from breaking due to various reasons and plays a protective role. Here are the key parameters related to the length and diameter of the spiral sheath 1: the step height H, the blast hole length L, the blast hole diameter D, the fracturing device length L1, the fracturing device diameter d, the number of fracturing devices N, the diameter D1 of the initiation wire, the length L2 of the spiral sheath 1, and the diameter D2. The calculation methods are as follows:
[0031] S1: Determine the number of fracturing devices N loaded according to the step height H and the blast hole length L. The blasting action length of the liquid carbon dioxide fracturing device is L / N, and the length of the initiation circuit 7 is at least L - L1, L - L1 - L / N, L - L1 - L / N..., L\N - L1;
[0032] S2: According to the length of the initiation wire, the length of the spiral sheath can be determined. Generally, it is considered that the exposed area of the initiation circuit is more appropriate between 0 and 0.5. Assuming that the spiral sheath tightly wraps the initiation wire in the blast hole and completely covers the initiation circuit, the length of the spiral sheath wire is:
[0033]
[0034] When the exposed area of the initiation circuit is 1 / 2, the length of the spiral sheath wire is:
[0035]
[0036] S3: The diameter of the spiral sheath should be determined under the condition that multiple fracturing devices do not get stuck, that is, D2 should satisfy:
[0037]
[0038] In a preferred embodiment, the quick connection lock 2 is an "S"-shaped device, which ensures that when two spiral sheaths 1 are connected, any two ends can be connected, providing convenience for construction. The quick connection lock 2 is also applied to the connection between the spiral sheath 1 and the fracturing device filling head, and the connection between the spiral sheath 1 and the ground fixing device 3.
[0039] In a preferred embodiment, the ground fixing device 3 includes an iron ring 5 and a plurality of steel nails 6. The iron ring 5 is provided with a plurality of connecting notches for connecting with the quick connection lock 2 of the spiral sheath 1. The iron ring 5 is provided with a plurality of nail holes, and the steel nails 6 are used to pass through the nail holes to fix the iron ring to the ground.
[0040] In a preferred embodiment, the outer diameter of the iron ring is 12 cm, the inner diameter of the iron ring is 8 cm, the thickness of the iron ring is 5 mm, the length of the steel nail 6 is 10 cm, and the diameter of the nail hole of the iron ring is the same as the diameter of the steel nail 6.
[0041] There are three ways to install the spiral sheath 1 outside the line in the detonation circuit protection device of the carbon dioxide fracturing device:
[0042] Winding method starting from the middle part to both ends:
[0043] Place the middle part of the detonation circuit wire at the middle part of the spiral sheath 1 and position it.
[0044] After positioning, wind the spiral sheath 1 towards both ends of the wire.
[0045] Take the completion of winding at one end of the wire and positioning at the quick connection lock 2 of the spiral sheath 1 as the criterion.
[0046] Winding method from one end to the other end:
[0047] Wind one end of the detonation circuit wire around one end of the spiral sheath 1 and position it.
[0048] After positioning, wind the spiral sheath 1 towards both ends of the wire.
[0049] Wait until the entire section of the spiral sheath 1 is located outside the wire, that is, the installation is completed.
[0050] Inserting method from one end to the other end:
[0051] Position one end of the detonation circuit wire on a thin stick-shaped object, and pass the wire and the stick-shaped object through the spiral sheath 1 together.
[0052] Wait until the wire and the stick-shaped object completely pass through the spiral sheath 1 and take the positioning of one end of the wire at the quick connection lock 2 as the criterion, that is, the installation is completed.
[0053] The above three methods can all achieve the quick installation of the spiral sheath 1 on the detonation circuit. The specific operation can select a suitable method according to the actual working conditions.
[0054] In some other embodiments, for the quick connection locks 2 at various parts of the overall device, there are no specified influencing indicators for their specifications and sizes. They can be produced and selected according to the specific diameter of the fracturing tube to adapt to the actual working conditions.
[0055] In the present utility model, specific examples are used to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.
Claims
1. A protection device for the initiation circuit of deep-hole pre-splitting of liquid carbon dioxide in the open air, characterized in that: Comprising: At least one spiral sheath, which is used to sleeved outside the initiating circuit, and quick connection latches are provided at both ends of the spiral sheath, and the quick connection latches of two adjacent spiral sheaths can be connected; A ground fixing device, which is used to be fixedly connected to the ground, and the quick connection latch of the spiral sheath can be connected to the ground fixing device; And A filling head connection buckle, one end of which is used to be fixedly connected to the filling head, and the other end can be connected to the quick connection latch of the spiral sheath.
2. The protection device for the initiation circuit of deep-hole pre-splitting in the open air with liquid carbon dioxide according to claim 1, wherein: The spiral sheath is made of insulating material.
3. The protection device for the initiation circuit of deep-hole pre-splitting with liquid carbon dioxide in the open air according to claim 2, characterized in that: The spiral sheath is made of flame-retardant material.
4. The protection device for the initiation circuit of deep-hole pre-splitting in the open air with liquid carbon dioxide according to claim 3, wherein: The spiral sheath is made of polyethylene material.
5. The protection device for the initiation circuit of open deep-hole pre-splitting with liquid carbon dioxide according to claim 4, characterized in that: The density of the spiral sheath is 0.93 g / cm 3 ~0.97 g / cm 3 .
6. The protection device for the initiation circuit of deep-hole pre-splitting of liquid carbon dioxide in the open air according to claim 5, wherein: The pitch of the spiral sheath is 5mm to 10mm, the diameter of the spiral line of the spiral sheath is 2mm to 4mm, and the overall length of the spiral sheath is 2m, 4m or 6m.
7. The protection device for the initiation circuit of deep-hole pre-splitting of liquid carbon dioxide in the open air according to claim 6, wherein: The quick connection latch is an "S"-shaped device.
8. The protection device for the initiation circuit of deep-hole pre-splitting of liquid carbon dioxide in the open air according to claim 1, characterized in that: The ground fixing device includes an iron ring and multiple steel nails. The iron ring is provided with a plurality of connection notches for connecting with the quick connection latches of the spiral sheath. The iron ring is provided with a plurality of nail holes, and the steel nails are used to pass through the nail holes to fix the iron ring to the ground.
9. The protection device for the initiation circuit of deep-hole pre-splitting of liquid carbon dioxide in the open air according to claim 8, characterized in that: The outer diameter of the iron ring is 12cm, the inner diameter of the iron ring is 8cm, the thickness of the iron ring is 5mm, the length of the steel nail is 10cm, and the diameter of the nail hole of the iron ring is the same as the diameter of the steel nail.