A directional pre-splitting blasting device for abnormal rock mass in thin coal seam

Abstract

The utility model discloses a kind of thin coal seam abnormal rock mass directional presplitting blasting device, specifically related to rock mass blasting field, including fixed base, the upper end surface of the fixed base is rotatably installed with fixed shaft, the top of the fixed shaft is fixedly installed with suspension block, the bottom of the fixed base is fixedly installed with link plate, the bottom of the link plate is fixedly installed with link plate, the bottom of the link plate is fixedly installed with semicircular baffle.The utility model is simple to operate when in use, the rubber layer of fixed base outer wall enhances and coal seam rock wall adhesion and friction, shock vibration displacement is prevented;With the aid of suspension block suspension hole cooperation rope, multiple devices can be placed at equal intervals, improve overall blasting efficiency, by rotating fixed base angle, in combination with the guiding needle corresponding to blasting surface, target rock mass can be accurately aligned, avoid presplitting failure, semicircular baffle uses high-strength titanium alloy composite material, blocks energy diffusion, forces energy concentrated release, ensure directional presplitting effect.

Description

Technical Field

[0001] This utility model relates to the field of rock blasting, and more specifically, to a directional pre-splitting blasting device for abnormal rock masses in thin coal seams. Background Technology

[0002] The core purpose of directional pre-splitting blasting of anomalous rock masses in thin coal seams is to address the challenges of limited space and difficult handling of anomalous rock masses in thin coal seams while controlling mining risks, thereby ensuring mining safety and efficiency.

[0003] In thin coal seams, the working space is narrow (usually the coal seam thickness is less than 1.3 meters). Traditional blasting devices lack a targeted fixed structure and are easily displaced by vibrations in the mining environment, resulting in deviations in the blasting position. At the same time, traditional blasting in thin coal seams is prone to pre-splitting failure due to inaccurate directional control, and blasting energy is prone to diffuse in non-target directions, which not only wastes energy but may also damage the surrounding normal coal seams.

[0004] Therefore, it is necessary to redesign a directional pre-splitting blasting device for abnormal rock masses in thin coal seams to address the above-mentioned problems. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a directional pre-splitting blasting device for abnormal rock masses in thin coal seams.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A directional pre-splitting blasting device for anomalous rock masses in thin coal seams includes a fixed base, a fixed shaft rotatably mounted on the upper surface of the fixed base, a suspension block fixedly mounted on the top end of the fixed shaft, a connecting plate fixedly mounted on the bottom end of the fixed base, a connecting plate fixedly mounted on the bottom end of the connecting plate, a semi-circular baffle fixedly mounted on the bottom end of the connecting plate, and a blasting face fixedly mounted on one side of the semi-circular baffle.

[0007] In a preferred embodiment, a lead wire is fixedly connected to the upper end of the blasting surface, and the end of the lead wire away from the blasting surface passes through the connecting plate and the fixed base and extends outward.

[0008] In a preferred embodiment, a blasting guide pin is fixedly installed on the outer wall of the connecting plate, and the position of the blasting guide pin corresponds to the position of the blasting surface.

[0009] In a preferred embodiment, the semi-circular baffle is made of titanium alloy composite material.

[0010] In a preferred embodiment, a rubber layer is fixedly installed on the outer wall of the fixing base.

[0011] In a preferred embodiment, a suspension hole is provided through one side of the suspension block.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model enhances the fit and friction between the rubber layer on the outer wall of the fixed base and the coal seam wall, ensuring that the device will not shift due to environmental vibration before blasting. At the same time, with the help of the suspension holes on the suspension block and the rope, multiple blasting devices can be placed at equal intervals. This solves the problem of fixing the device in the narrow space of thin coal seam, and also enables the simultaneous blasting operation by arranging the devices in batches, reducing the number of operations for single-area blasting and improving the overall blasting efficiency.

[0013] 2. This utility model adjusts the blasting angle by rotating the fixed base, and with the blasting guide pin corresponding to the blasting surface position, the blasting surface can be accurately aligned with the target abnormal rock mass, avoiding pre-splitting failure caused by blasting direction deviation. The semi-circular baffle is made of high-strength titanium alloy composite material, which can effectively block the blasting energy from spreading to non-target directions, forcing the energy to be concentrated and released from the blasting surface, ensuring the directional pre-splitting effect on the abnormal rock mass, while also avoiding the damage of excess energy to the surrounding normal coal seam.

[0014] In summary, this utility model is simple to operate. The rubber layer on the outer wall of the fixed base enhances the fit and friction with the coal seam rock wall, preventing vibration and displacement. With the help of the suspension holes of the suspension block and the rope, multiple devices can be placed at equal intervals, improving the overall blasting efficiency. By rotating the fixed base to adjust the angle, combined with the guide needle corresponding to the blasting surface, it can accurately aim at the target rock mass, avoiding pre-splitting failure. The semi-circular baffle is made of high-strength titanium alloy composite material, which blocks energy diffusion and forces energy to be released in a concentrated manner, ensuring the directional pre-splitting effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a directional pre-splitting blasting device for anomalous rock masses in thin coal seams proposed in this utility model; Figure 2 This is a schematic diagram of the fixed base of a directional pre-splitting blasting device for a thin coal seam abnormal rock mass proposed in this utility model; Figure 3 This is a schematic diagram of the connecting plate portion of a directional pre-splitting blasting device for a thin coal seam with abnormal rock mass proposed in this utility model; Figure 4 This is a schematic diagram of the blasting surface of a directional pre-splitting blasting device for abnormal rock masses in thin coal seams, as proposed in this utility model.

[0016] In the diagram: 1. Fixed base; 2. Connecting plate; 3. Fixed shaft; 4. Suspension block; 5. Lead wire; 6. Rubber layer; 7. Semi-circular baffle; 8. Blasting surface; 9. Suspension hole; 10. Blasting guide needle. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not 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 effort are within the protection scope of the present utility model.

[0018] Reference Figure 1-4 A directional pre-splitting blasting device for anomalous rock masses in thin coal seams includes a fixed base 1. A rubber layer 6 is fixedly installed on the outer wall of the fixed base 1. The rubber layer 6 enhances the fit with the rock wall through the elasticity of the rubber material, allowing for a tight fit even on the irregular rock wall surface of the thin coal seam. Furthermore, the high frictional properties of the rubber facilitate the operator's rotation of the fixed base 1. A fixed shaft 3 is rotatably installed on the upper end of the fixed base 1. A suspension block 4 is fixedly installed at the top of the fixed shaft 3. A suspension hole 9 is provided through one side of the suspension block 4. Multiple devices can be suspended at equal intervals in the thin coal seam working area through the suspension hole 9 and ropes. A connecting plate 2 is fixedly installed at the bottom of the fixed base 1. A semi-circular baffle 7 is fixedly installed at the bottom of the connecting plate 2. A blasting surface 8 is fixedly installed on one side of the semi-circular baffle 7. It should be noted that the blasting surface should be filled with explosives.

[0019] A fuse 5 is fixedly connected to the upper end of the blasting face 8. The end of the fuse 5 away from the blasting face 8 passes through the connecting plate 2 and the fixed base 1 and extends outward. One end of the fuse 5 is fixedly connected to the blasting face 8, and the other end passes through the connecting plate 2 and the fixed base 1 and extends outward, so that the operator can ignite the fuse 5 from a safe distance, avoid close contact with the blasting area, and reduce safety risks.

[0020] A blasting guide pin 10 is fixedly installed on the outer wall of the connecting plate 2, and the position of the blasting guide pin 10 corresponds to the position of the blasting surface 8. The blasting guide pin 10 is fixed to the outer wall of the connecting plate 2 and corresponds to the position of the blasting surface 8, providing a direct visual reference for the orientation of the device. In the narrow working environment of thin coal seams and insufficient light, operators do not need to use complicated instruments. They can quickly calibrate the direction of the blasting surface 8 by observing the direction of the blasting guide pin 10, ensuring that the blasting surface 8 is accurately aligned with the abnormal rock mass.

[0021] The semi-circular baffle 7 is made of titanium alloy composite material, which has both high strength and impact resistance. During the blasting process, the baffle can effectively block the blasting energy from spreading to non-target directions, forcing the energy to be concentrated and released from the blasting surface 8.

[0022] When using this utility model, the device is placed in the working area of ​​the abnormal rock mass of the thin coal seam. By fixing the rubber layer 6 on the outer wall of the base 1, the fit and friction between the device and the coal seam rock wall are enhanced, and the device is prevented from shifting due to environmental vibration before blasting. At the same time, multiple blasting devices can be placed at equal intervals for blasting by using the suspension hole 9 through the suspension block 4 and the rope.

[0023] The fixed shaft 3, which is rotatably installed on the upper end face of the fixed base 1, rotates. The suspension block 4 at the top of the fixed shaft 3 rotates synchronously with the fixed shaft 3. By adjusting the rotation angle of the fixed base 1, the orientation of the entire device is indirectly changed. During this process, the blasting guide 10, which is fixedly installed on the outer wall of the connecting plate 2, serves as a visual reference. Since the position of the blasting guide 10 corresponds to the position of the blasting surface 8 on one side of the semi-circular baffle 7, the blasting surface 8 can be precisely aligned with the direction of the abnormal rock mass that needs to be pre-splitting by observing the direction of the blasting guide 10, thus completing the orientation calibration.

[0024] After confirming that the blasting face 8 is aligned with the target rock mass, the operator operates the lead wire 5 fixedly connected to the upper end of the blasting face 8 from a safe distance. The end of the lead wire 5 away from the blasting face 8 passes through the connecting plate 2 and the fixed base 1 and extends outward. By igniting the externally extended lead wire 5, energy is transferred along the lead wire 5 to the blasting face 8, triggering the blasting face 8 to perform pre-splitting blasting operations on the abnormal rock mass of the thin coal seam.

[0025] During the blasting process, the semi-circular baffle 7 plays a key role in directional energy focusing: because the semi-circular baffle 7 is made of high-strength titanium alloy composite material, it has excellent impact resistance and can prevent the blasting energy from spreading to non-target directions, forcing the blasting energy to be concentrated and released from the blasting surface 8, ensuring the directional pre-splitting effect on abnormal rock masses, and avoiding energy waste or damage to the surrounding normal coal seams.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A directional pre-splitting blasting device for anomalous rock masses in thin coal seams, comprising a fixed base (1), characterized in that: A fixed shaft (3) is rotatably mounted on the upper end face of the fixed base (1). A suspension block (4) is fixedly mounted on the top end of the fixed shaft (3). A connecting plate (2) is fixedly mounted on the bottom end of the fixed base (1). A semi-circular baffle (7) is fixedly mounted on the bottom end of the connecting plate (2). A blasting surface (8) is fixedly mounted on one side of the semi-circular baffle (7).

2. The directional pre-splitting blasting device for thin coal seam abnormal rock mass according to claim 1, characterized in that: The upper end of the blasting surface (8) is fixedly connected with a lead wire (5), and the end of the lead wire (5) away from the blasting surface (8) passes through the connecting plate (2) and the fixed base (1) respectively and extends outward.

3. The directional pre-splitting blasting device for anomalous rock mass in a thin coal seam according to claim 1, characterized in that: A blasting guide needle (10) is fixedly installed on the outer wall of the connecting plate (2), and the position of the blasting guide needle (10) corresponds to the position of the blasting surface (8).

4. The directional pre-splitting blasting device for anomalous rock mass in a thin coal seam according to claim 1, characterized in that: The semi-circular baffle (7) is made of titanium alloy composite material.

5. The directional pre-splitting blasting device for anomalous rock mass in a thin coal seam according to claim 1, characterized in that: A rubber layer (6) is fixedly installed on the outer wall of the fixed base (1).

6. The directional pre-splitting blasting device for anomalous rock mass in a thin coal seam according to claim 5, characterized in that: A suspension hole (9) is provided through one side of the suspension block (4).

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