Liquid oxygen fracturing device for strip mine

Abstract

The liquid oxygen fracturing device comprises a hole and a fracturing device main body, the fracturing device main body is arranged at the bottom in the hole, a blocking filling layer is arranged at the position, located at the top of the fracturing device main body, of the hole, and the fracturing device main body comprises an inner paper roll inner layer and an outer layer sealing rubber sleeve. An exhaust pipe extending to the outside, an injection aluminum pipe and an ignition wire are connected into the cracking device body, the end of the exhaust pipe is located at the top in the cracking device body, the end of the injection aluminum pipe is located at the bottom in the injection aluminum pipe, and the ignition wire extends into the cracking device body and is connected with an igniter. And auxiliary sealing rubber sleeves are connected to the joints of the exhaust pipe, the injection aluminum pipe and the ignition wire with the cracking device main body. Compared with the prior art, the utility model has the advantages that the adopted cracking device is made of a flexible material, liquid oxygen is fully absorbed through the fiber paper roll, then cracking is carried out through electric starting, the use is safer and more convenient, the structure is simple, and the cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid oxygen fracturing equipment, in particular to a liquid oxygen fracturing device for open-pit mines. Background Art

[0002] Gas fracturing engineering is an engineering technology that uses high energy to break rocks or ores. Compared with traditional blasting technologies, gas fracturing engineering utilizes high energy to release high-energy shock waves through a violent oxidation reaction, thereby achieving the purpose of breaking rocks or ores. Gas fracturing engineering has the advantages of safety, high efficiency, environmental protection, etc., and is applicable to a variety of complex working environments, such as mining, geotechnical engineering, building demolition, etc.

[0003] Traditional liquid oxygen fracturing devices are all metal sealed tanks. After inflating externally, the tanks are then dropped into holes. However, during the dropping process of this traditional fracturing equipment, it is easy to break the igniter wire, and the tank body has a complex structure and high cost, and the use safety is low. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a liquid oxygen fracturing device for open-pit mines with safe use and low cost in view of the deficiencies mentioned in the above background art.

[0005] To solve the above technical problem, the technical solution provided by the utility model is: a liquid oxygen fracturing device for open-pit mines, including a hole and a fracturing device main body. The fracturing device main body is placed at the bottom inside the hole. There is a plugging and filling layer provided at the top of the hole above the fracturing device main body. The fracturing device main body includes an inner paper roll layer and an outer sealing rubber sleeve. Inside the fracturing device main body, there are connected an exhaust pipe, an injection aluminum pipe, and an ignition wire that extend to the outside. The end of the exhaust pipe is arranged at the top inside the fracturing device main body. The end of the injection aluminum pipe is arranged at the bottom inside the injection aluminum pipe. The ignition wire extends into the fracturing device main body and is connected with an igniter. At the connection of the exhaust pipe, the injection aluminum pipe, and the ignition wire with the fracturing device main body, there is a secondary sealing rubber sleeve connected.

[0006] Further, the plugging and filling layer is made of rock cuttings and yellow mud, which is convenient for plugging operations.

[0007] Further, the plugging and filling layer is made of quick-setting mortar, which is convenient for quick sealing and plugging operations.

[0008] Further, the injection aluminum pipe extends to the outside and is connected with a low-temperature bellows pipe, which is convenient for connecting an external liquid oxygen Dewar tank

[0009] Further, the paper roll inner layer is made of fiber medium, which is convenient for quickly absorbing liquid oxygen.

[0010] The advantages of a liquid oxygen fracturing device for open-pit mines of the present utility model compared with the prior art are as follows: The fracturing device adopted in the present utility model is made of flexible materials. The fiber paper roll fully absorbs liquid oxygen, and then it is electrically started for fracturing. It is safer and more convenient to use, and has a simple structure and low cost. Brief Description of the Drawings

[0011] Figure 1 It is a schematic structural diagram of a liquid oxygen fracturing device for open-pit mines of the present utility model.

[0012] Figure 2 It is a schematic structural diagram of the main body of the fracturing device of a liquid oxygen fracturing device for open-pit mines of the present utility model.

[0013] Figure 3 It is a schematic cross-sectional structural diagram of the main body of the fracturing device of a liquid oxygen fracturing device for open-pit mines of the present utility model.

[0014] As shown in the figure: 1. Main body of the fracturing device; 2. Inner layer of the paper roll; 3. Outer sealing rubber sleeve; 4. Auxiliary sealing rubber sleeve; 5. Exhaust pipe; 6. Aluminum injection pipe; 7. Ignition wire; 8. Low-temperature bellows; 9. Hole; 10. Plugging filling layer; 11. Igniter. Detailed Embodiment

[0015] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0016] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model 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 of the present utility model.

[0017] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meaning of the above terms in the present utility model can be understood according to specific situations.

[0018] The following further detailed description of the present utility model is made with reference to the accompanying drawings.

[0019] Combined with the attached Figures 1-3, A liquid oxygen fracturing device for open-pit mines, including a hole 9 and a fracturing device main body 1. The fracturing device main body 1 is placed at the bottom inside the hole 9. There is a plugging and filling layer 10 at the top of the hole 9 where the fracturing device main body 1 is located. The plugging and filling layer 10 is set with rock cuttings, yellow mud and quick-setting mortar.

[0020] The fracturing device main body 1 includes an inner paper roll layer 2 and an outer sealing rubber sleeve 3 inside. The paper roll inner layer 2 is set with a fiber medium. Inside the fracturing device main body 1, there are connected an exhaust pipe 5, an injection aluminum pipe 6 and an ignition wire 7 that extend to the outside. The end of the exhaust pipe 5 is set at the top inside the fracturing device main body 1. The end of the injection aluminum pipe 6 is set at the bottom inside the injection aluminum pipe 6. The injection aluminum pipe 6 extends to the outside and is connected with a cryogenic corrugated pipe 8. The ignition wire 7 extends into the fracturing device main body 1 and is connected with an igniter 11. At the connection of the exhaust pipe 5, the injection aluminum pipe 6 and the ignition wire 7 with the fracturing device main body 1, there is connected a secondary sealing rubber sleeve 4.

[0021] When the present utility model is specifically implemented, first, drilling is carried out. The conventional depth of the hole 9 is 1 - 20 meters, and the hole diameter is 90 - 115 mm.

[0022] 2) The fracturing device main body 1 is composed of an injection aluminum pipe 6 with a reserved hole in the bottom sealing pipe body, a fiber medium (paper roll inner layer 2), an outer sealing rubber sleeve 3, an exhaust pipe 5 and an ignition wire 7. The paper roll inner layer 2 is sleeved on the aluminum pipe, and the outside is sealed against water with the outer sealing rubber sleeve 3 and the secondary sealing rubber sleeve 4. It is placed at the bottom of the hole 9. The exhaust pipe 5 is installed on the upper part of the fracturing device main body 1, and the exhaust pipe 5 extends out of the hole, which is used to observe the saturation degree of liquid oxygen in the hole. A space for the plugging and filling layer 10 is reserved between the fracturing device main body 1 and the orifice of the hole 9.

[0023] 3) Connect the liquid oxygen Dewar tank and the injection aluminum pipe 6 with the cryogenic corrugated pipe 8 to introduce liquid oxygen. The liquid oxygen Dewar tank is a common liquid oxygen pressure tank, so no more details are given. Use the pressure in the tank to introduce liquid oxygen into the fracturing device main body 1. When the fiber medium (paper roll inner layer 2) in the fracturing device main body 1 absorbs liquid oxygen to saturation, blue gas will appear in the exhaust pipe 5.

[0024] 4) The plugging and filling layer 10 and the filling depth are determined according to the hole depth, external conditions, etc. Generally, rock cuttings and yellow mud are used. When necessary, auxiliary measures such as quick-setting mortar are adopted.

[0025] 5) Ignition: Place a remotely controllable igniter 11 in the fracturing device main body 1 in advance. Personnel evacuate to a safe position, and the warning measures are improved. After ensuring safety, ignition and fracturing are carried out.

[0026] The above description is made on the present utility model and its implementation manners. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present utility model, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and without departing from the gist of the creation of the present utility model, they design without creative efforts structural manners and embodiments similar to the technical solution, all of which shall fall within the protection scope of the present utility model.

Claims

1. A liquid oxygen fracturing device for open-pit mines, comprising a hole (9) and a fracturing device main body (1), wherein the fracturing device main body (1) is placed at the inner bottom of the hole (9), and a plugging and filling layer (10) is provided at the top of the hole (9) where the fracturing device main body (1) is located, and is characterized in that: The described cracker body (1) includes an inner paper roll layer (2) and an outer sealing rubber sleeve (3). An exhaust pipe (5), an aluminum injection pipe (6), and an ignition wire (7) that extend to the outside are connected inside the cracker body (1). The end of the exhaust pipe (5) is arranged at the inner top of the cracker body (1), the end of the aluminum injection pipe (6) is arranged at the inner bottom of the aluminum injection pipe (6), the ignition wire (7) extends into the cracker body (1) and is connected with an igniter (11). Secondary sealing rubber sleeves (4) are connected at the joints of the exhaust pipe (5), the aluminum injection pipe (6), and the ignition wire (7) with the cracker body (1).

2. The liquid oxygen fracturing device for open-pit mines according to claim 1, characterized in that: The described plugging filling layer (10) is set with cuttings and yellow mud.

3. The oxy-liquefied fracturing device for open-pit mines according to claim 1, wherein: The described plugging filling layer (10) is set with quick-setting mortar.

4. The oxy-liquid fracturing device for open-pit mines according to claim 1, characterized in that: The described aluminum injection pipe (6) extends to the outside and is connected with a low-temperature corrugated pipe (8).

5. The liquid oxygen fracturing device for open-pit mines according to claim 1, characterized in that: The paper roll inner layer (2) is made of fiber medium.

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