Non-coupling charging auxiliary device

Abstract

The utility model discloses a non-coupling charging auxiliary device which comprises an anti-static body, one end of the anti-static body is provided with a bearing platform end, the other end of the anti-static body is provided with a bearing plate end, and a closed containing space is arranged on the anti-static body and located between the bearing platform end and the bearing plate end. An inner threaded hole is formed in the bearing platform end; the bearing plate end is provided with an external threaded rod matched with the internal threaded hole, and the external threaded rod protrudes out of the anti-static body. When a plurality of anti-static bodies are spliced, the adjacent anti-static bodies are in threaded connection through matching of the external threaded rods and the internal threaded holes. The explosive filling device has the advantages that auxiliary filling can be carried out on the explosive filling holes, space appears in the explosive filling holes under the condition that cost is saved, and the explosive filling device is used for improving more uniform arrangement of explosives along blast holes, improving expansion acting of high-temperature and high-pressure gas, improving the utilization rate of explosive explosion energy and the like.

Description

Technical Field

[0001] The utility model relates to an uncoupled charging auxiliary device. Background Art

[0002] In recent years, people's livelihood construction has developed rapidly. In the process of people's livelihood construction, stone mines play an important role. Blasting construction is an important part of the stone mine mining process. Blasting operations are becoming more and more frequent, the blasting construction environment conditions are becoming more and more complex, and the scale of blasting is becoming larger and larger.

[0003] In engineering blasting, the rock blasting destruction process is divided into the following three stages:

[0004] The first stage is the radial compression phase of the shock wave following the explosive detonation. After the explosive detonates, the high pressure generated shatters the rock surrounding the blasthole. The shock wave, traveling at a speed of 3,000 to 5,000 m / s, induces tangential tensile stress in the rock, generating radial cracks that propagate toward the free surface. The shock wave propagates outward from the blasthole, requiring 1 to 2 milliseconds for radial cracks to appear. This generates centripetal tensile stress in the opposite direction of the compressive stress wave, causing the rock particles to move radially in the opposite direction, forming annular cracks.

[0005] The second stage is the rock flakes off at the free surface due to shock wave reflection. In the first stage, the shock wave pressure is positive. When the shock wave reaches the free surface and reflects, the pressure becomes negative, transforming from a compressive stress wave to a tensile stress wave. Under the action of the reflected tensile stress, the rock breaks, causing "flakes." This stage occurs 10 to 20 milliseconds after detonation.

[0006] The third stage is the expansion of the explosive gases. Under the influence of the extremely high pressure of the explosive gases, the rock undergoes a rapid expansion of initial radial cracks under the dual effects of tensile stress and gas wedge formation, ejecting broken rock blocks. The propagation of stress disturbances induced by the explosive detonation in the rock mass is called the blast stress wave. This blast stress wave is a pulse wave within the rock mass, lacking periodicity, and can cause varying degrees of damage to the rock. Simultaneously, the explosive detonation within the blasthole generates a large amount of high-temperature, high-pressure gas that expands and performs work. Therefore, in addition to the blast stress wave generated by the explosive detonation in the rock mass, there is also a large amount of high-temperature, high-pressure gas that performs work. Therefore, the effects of explosive detonation in rock drilling can be divided into internal and external effects. Rock mass is inherently compressive but not tensile. Under the cyclical action of the blast stress wave and the explosive gases, cracks form in the rock mass, leading to its fragmentation.

[0007] When explosives are placed in infinitely homogeneous rock and detonated, different destruction zones are formed in the rock, centered on the explosives and moving farther out. Along the radial plane along the length of the blasthole charge, a crushing zone (compression zone), a fissure zone (rupture zone), and an elastic vibration zone are formed. The rock mass in the crushing zone (compression zone) tends to be excessively fragmented, while the rock mass in the fissure zone (rupture zone) tends to contain large chunks of rock.

[0008] In open-pit deep hole bench blasting, in order to reduce the cost of drilling and improve production efficiency, large-diameter drilling rigs are often used for perforation. Four types of charging structures are commonly used: continuous charging structure, segmented charging structure, bottom hole interval charging structure and mixed charging structure. The charging structures are as follows:

[0009] ⑴ Continuous charging structure. Explosives are continuously loaded along the axial direction of the blasthole. The advantage is simple operation; the disadvantage is that the charge column is relatively low, and large chunks are easily formed in the uncharged part of the hole mouth.

[0010] (2) Segmented charging structure. The charge column in the deep hole is divided into several sections, separated by air, rock slag or water. The advantage is that it increases the charging height and reduces the occurrence of large pieces at the hole mouth. The disadvantage is that the construction is complicated.

[0011] (3) Bottom hole spacer charging structure. A section of the bottom of the deep hole is left unfilled, with air used as the spacer medium. Other spacers include water spacers and flexible material spacers. Air spacer charging at the bottom of the hole is also called bottom hole air cushion charging.

[0012] (4) Mixed charge structure: High-strength explosives are placed at the bottom of the hole, while ordinary explosives are placed at the top. This makes construction more complicated.

[0013] In order to fully utilize the energy utilization of the shock wave generated by the explosion of explosives in the blast hole in the rock mass and the expansion of a large amount of high-temperature and high-pressure gas to perform work, an uncoupled charging auxiliary device is required. Summary of the Invention

[0014] The purpose of the utility model is to provide an uncoupled charge auxiliary device to address the defects of the prior art.

[0015] In order to achieve the above-mentioned purpose of the utility model, the following technical solutions are adopted:

[0016] A non-coupled charging auxiliary device includes an anti-static body, one end of the anti-static body is provided with a base end, the other end is provided with a support plate end, and a closed accommodating space is provided on the anti-static body between the base end and the support plate end; the base end is provided with an internal threaded hole; the support plate end is installed with an external threaded rod matching the internal threaded hole, and the external threaded rod protrudes from the anti-static body; wherein, when multiple anti-static bodies are spliced, adjacent anti-static bodies are threadedly connected through the external threaded rod and the internal threaded hole.

[0017] Furthermore, the antistatic body extends longitudinally, and its cross section is an arc surface, the central angle of the arc surface is α, and 180°≤α≤270°.

[0018] Furthermore, the anti-static body has a length of 1040 mm and a diameter of 145 mm.

[0019] Furthermore, the anti-static body is a semi-cylinder or a three-quarter cylinder.

[0020] Furthermore, the antistatic body is a PVC antistatic body.

[0021] Furthermore, the uncoupled charging auxiliary device of the present invention also includes a lifting ring, which is installed on the end of the supporting plate.

[0022] Furthermore, the hanging ring is a nylon hanging ring.

[0023] Furthermore, the internal threaded hole is a tapered internal threaded hole, and the external threaded rod is a tapered external threaded rod; the internal threaded hole and the external threaded rod are connected with tapered threads.

[0024] Furthermore, the anti-static body includes a shell and a sealing plate, one end of the shell is provided with a base end, and the other end is provided with a base plate end, and an arc-shaped groove is formed between the base end and the base plate end; the sealing plate is sealed and buckled on the base end, the base plate end and the shell; wherein, the arc-shaped groove and the sealing plate constitute an accommodating space.

[0025] Furthermore, the thickness of the shell and the sealing plate are both 1.5 to 2 mm.

[0026] The present invention has the following advancements over the prior art:

[0027] The utility model can arrange the explosives more evenly in the blasthole while using the same explosive and reducing the amount of explosives used, thereby increasing the charge height and increasing the space in the blasthole. Therefore, when the explosives explode, the anti-static body can be destroyed by the impact force and high temperature, so that the accommodating space in the anti-static body can be fully expanded due to the high-temperature and high-pressure gas generated by the explosion of the explosives, and work can be done in the blasthole, thereby achieving the effect of improving the blasting efficiency. Due to the effect of the auxiliary charge device, the charge amount in the middle and upper parts of the blasthole is reduced, which can reduce the excessive crushing of the rock mass in the crushing zone and improve the utilization rate of the explosive explosion energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0029] Figure 1 This is a structural schematic diagram of an uncoupled charge auxiliary device of the utility model;

[0030] Figure 2 This is a structural diagram of the utility model from another angle;

[0031] Figure 3 This is another structural diagram of the utility model;

[0032] Figure 4 This is a schematic diagram of an expanded structure of the utility model;

[0033] The serial numbers in the figure and their corresponding component names:

[0034] 1-antistatic body, 101-shell, 102-sealing plate, 11-support end, 12-inner threaded hole, 13-accommodation space, 14-support plate end, 15-lifting ring, 16-external threaded rod. DETAILED DESCRIPTION

[0035] In order to enable people skilled in the art to better understand the technical solutions in this application, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of this application. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of this application.

[0036] like Figure 1-4 As shown, an uncoupled charging auxiliary device includes an anti-static body 1, one end of the anti-static body 1 is provided with a base end 11, the other end is provided with a support plate end 14, and a closed accommodating space 13 is provided on the anti-static body 1 between the base end 11 and the support plate end 14; the base end 11 is provided with an internal threaded hole 12; the support plate end 14 is installed with an external threaded rod 16 matching the internal threaded hole 12, and the external threaded rod 16 protrudes from the anti-static body 1; wherein, when multiple anti-static bodies 1 are spliced, adjacent anti-static bodies are threadedly connected through the external threaded rod 16 and the internal threaded hole 12.

[0037] The anti-static body 1 extends longitudinally and has a circular arc cross-section. The central angle of the arc is α, and 180°≤α≤270°. It is understood that the anti-static body has a strip-like structure. The central angle α can be 180°, 200°, 220°, 230°, 240°, 250°, 260°, or 270°, etc.

[0038] like Figure 1-4 As shown, one side of the anti-static body 1 is an arc surface, and the other side is a flat surface.

[0039] The diameter of the antistatic body 1 is slightly smaller than the diameter of the blasthole, which is convenient for installation. It should be noted that the specific size and length of the antistatic body 1 can be made according to the actual needs of the blasting operation.

[0040] In some optional embodiments, a structure of an anti-static body is provided. The anti-static body 1 has a length of 1040 mm and a diameter of 145 mm.

[0041] like Figure 1 、 2 As shown in 4, one structure of the anti-static body 1 is a semi-cylinder.

[0042] like Figure 3 As shown, another structure of the anti-static body is a three-quarter cylinder.

[0043] In some optional embodiments of the present disclosure, the antistatic body 1 is a PVC antistatic body. That is, the antistatic body can be made of PVC. It has excellent antistatic performance, and its resistivity is usually 10 6 to 10 9 Ohms, can effectively prevent the generation and accumulation of static electricity. PVC material also has good electrical insulation properties.

[0044] In some optional embodiments of the present disclosure, in order to facilitate the lifting of the anti-static body into the blasthole, a lifting ring 15 is additionally installed, and the lifting ring 15 is installed on the support plate end 14.

[0045] It is understandable that when the anti-static body is hoisted into the blasthole, the support plate end is located at the top and the support platform end is located at the bottom.

[0046] It should be noted that the lifting ring can withstand a tensile force greater than 200 Newtons, which can meet the tensile force requirements of lifting multiple sections of the anti-static body into the blast hole after being spliced and connected.

[0047] In some optional embodiments of the present disclosure, a material of the hanging ring is provided, and the hanging ring 15 is a nylon hanging ring. Nylon has a significant anti-static ability, which is mainly reflected in: preventing electrostatic damage to electronic parts, preventing electrostatic dust from being attracted, and preventing electrostatic sparks.

[0048] In some optional embodiments of the present disclosure, a structure of an internal threaded hole and an external threaded rod is provided. Figure 1-4 As shown, the internal threaded hole 12 is a tapered internal threaded hole, and the external threaded rod 16 is a tapered external threaded rod; the internal threaded hole 12 and the external threaded rod 16 are connected with tapered threads.

[0049] The internal threaded hole 12 and the external threaded rod 16 are connected by a tapered thread. When the tapered thread is connected, a large radial force is generated when rotating, inserting or screwing in, making the connection tighter.

[0050] One structure of the internal threaded hole may be: the thread pitch is 6.6 mm, the thread height is 2 mm, the thread top surface diameter is 25 mm, the thread bottom surface diameter is 55 mm, and the internal thread depth is 40 mm.

[0051] It is understood that, when in use, the external threads on the externally threaded rod match the internal threads of the internally threaded hole. Therefore, one configuration of the external threads on the externally threaded rod may be: a thread pitch of 6.6 mm, a thread height of 2 mm, a thread top diameter of 25 mm, a thread bottom diameter of 55 mm, and an external thread height of 40 mm.

[0052] It should be noted that the internal threaded hole 12 and the external threaded rod 16 can be provided correspondingly.

[0053] It is understood that the internal threaded hole 12 and the external threaded rod 16 may be positioned such that the internal threaded hole is sunken into the base end and is located at the center of the base end, while the external threaded rod is located at the center of the support plate end.

[0054] In some optional embodiments of the present disclosure, a structure of an anti-static body is provided, such as Figure 4 As shown, the anti-static body 1 includes a shell 101 and a sealing plate 102. One end of the shell 101 is provided with a base end 11, and the other end is provided with a base end 14. An arc groove is formed between the base end 11 and the base end 14; the sealing plate 102 is sealed and buckled on the base end 11, the base end 14 and the shell 101; wherein, the arc groove and the sealing plate 102 constitute an accommodating space 13.

[0055] The housing 101 and the support platform end 11 and the support plate end 14 can be an integrally formed structure, which can ensure the airtightness of the connection between the housing 101, the support platform end 11 and the support plate end 14.

[0056] The sealing plate 102 is tightly buckled onto the shell 101, the support platform end 11 and the support plate end 14, so that the connection between the sealing plate 102 and the shell 101, the support platform end 11 and the support plate end 14 is airtight, thereby forming a closed accommodating space between the sealing plate and the arc-shaped groove. It is understandable that the sealing plate 102 and the shell 101, the support platform end 11 and the support plate end 14 can be connected by welding. When the sealing plate 102, the shell 101, the support platform end 11 and the support plate end 14 are made of PVC material, the sealing plate 102 and the shell 101, the support platform end 11 and the support plate end 14 can be connected by hot melt welding. Of course, it is not limited to this, and strong glue can also be used for bonding. The sealing plate 102 and the shell 101, the support platform end 11 and the support plate end 14 can be sealed, bonded and fixedly connected by strong glue.

[0057] The thickness of the shell 101 and the sealing plate 102 is 1.5-2 mm. Possible thicknesses include 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or 2 mm. A sealed space is formed between the sealing plate and the shell. When the explosive explodes, the impact and high temperature destroy the anti-static body, allowing the high-temperature, high-pressure gas generated by the explosive explosion within the space inside the anti-static body to fully expand and perform work on the blasthole.

[0058] According to the above embodiment, the working mode of the utility model is as follows:

[0059] The number of anti-static bodies 1 is selected according to the specifications of the blasthole, and then multiple anti-static bodies 1 are spliced and connected.

[0060] One working method is as follows: during open-pit deep-hole blasting operations, explosives are loaded at the bottom of the charge hole, and coupled charging is used to ensure that there is sufficient energy during the explosion to overcome the large clamping effect between the rocks at the bottom of the blast hole. The anti-static bodies 1 obtained by splicing are then connected in sequence and hoisted into the blast hole that has been bottom-loaded, so that the anti-static bodies 1 fit the blast hole, and are sequentially connected to the position of the designed charge height. The anti-static bodies 1 are gradually lowered until they contact the bottom explosives, and then explosives are injected into the charge hole until the charge hole is full and the charge hole is filled. This can make the charge in the charge hole more uniform, increase the charge height, reduce labor intensity, and after detonating the explosives, the explosion energy is released more evenly to the rock mass and the high-temperature and high-pressure gas can be fully expanded, thereby achieving the effects of improving the energy utilization rate of the explosives, reducing the rate of large blocks, and reducing the hazards of blasting.

[0061] Another working method is based on blasting using electronic detonators, which aims to protect the integrity of the rock mass in the unexploded area, reduce the degree of rock damage, and save costs.

[0062] In the construction of open-pit mines, as the mining and stripping project proceeds, some slopes are often not used for production for a long time. The use of conventional deep hole blasting often causes damage to the slopes in the reserved area. Under the action of rainwater erosion and weathering, more dangerous rocks and broken rocks on the top of the slope are often formed. Controlled blasting is needed. Since it is not the final slope, the use of controlled blasting will result in a waste of resources. The use of this utility model can reduce the damage to the slope and achieve the purpose of saving at the same time.

[0063] During the blasting operation, the uncoupled charging auxiliary device of the utility model is placed in the last row of blast holes in the blasting area.

[0064] First, explosives are loaded at the bottom of the charging hole according to the design, and coupled charging is used to ensure that there is enough energy during the explosion to overcome the larger clamping effect between the rocks at the bottom of the blast hole. Then, the anti-static body splicing structure obtained by splicing multiple anti-static bodies 1 is hoisted into the blast hole with the bottom loaded according to needs, and the accommodating space on each anti-static body is tightly fitted with the hole wall in the direction of the area to be retained, and the anti-static body splicing structure is gradually lowered to contact the bottom explosive, and then explosives are injected into the charging hole until the charging hole is full and the charging hole is filled.

[0065] After the explosive is detonated, the blast stress wave propagates outward, creating cracks in the borehole wall and along the line connecting the blastholes. The high-temperature, high-pressure explosion gas destroys the anti-static body, causing the air in the containment space 13 within the anti-static body 1 to expand and then diffuse in all directions, extending and widening the original cracks and ultimately forming a smooth crack surface. Protected by the anti-static body, the explosive does not directly contact the rock mass in the reserved area. The cavity within the anti-static body mitigates the damage caused by the blast stress wave to the rock mass in the reserved area.

[0066] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An uncoupled charge auxiliary device, characterized by: include An antistatic body (1), wherein one end of the antistatic body (1) is provided with a support platform end (11), and the other end is provided with a support plate end (14), and a sealed accommodation space (13) is provided on the antistatic body (1) between the support platform end (11) and the support plate end (14); The platform end (11) is provided with an internal threaded hole (12); The support plate end (14) is mounted with an external threaded rod (16) matching the internal threaded hole (12), and the external threaded rod (16) protrudes from the antistatic body (1); When a plurality of antistatic bodies (1) are spliced together, adjacent antistatic bodies are threadedly connected via external threaded rods (16) and internal threaded holes (12).

2. The uncoupled charge auxiliary device according to claim 1, characterized in that: The antistatic body (1) extends longitudinally, and its cross section is an arc surface, the center angle of the arc surface is α, and 180°≤α≤270°.

3. The uncoupled charge auxiliary device according to claim 1 or 2, characterized in that: The antistatic body (1) has a length of 1040 mm and a diameter of 145 mm.

4. The uncoupled charge auxiliary device according to claim 1 or 2, characterized in that: The antistatic body (1) is a semi-cylinder or a three-quarter cylinder.

5. The uncoupled charge auxiliary device according to claim 1, characterized in that: The antistatic body (1) is a PVC antistatic body.

6. The uncoupled charge auxiliary device according to claim 1, characterized in that: It also includes a lifting ring (15), which is installed on the supporting plate end (14).

7. The uncoupled charge auxiliary device according to claim 6, characterized in that: The hanging ring (15) is a nylon hanging ring.

8. The uncoupled charge auxiliary device according to claim 1, characterized in that: The internal threaded hole (12) is a tapered internal threaded hole, and the external threaded rod (16) is a tapered external threaded rod; The internal threaded hole (12) is connected to the external threaded rod (16) in a tapered threaded manner.

9. The uncoupled charge auxiliary device according to claim 1, characterized in that: The anti-static body (1) comprises a shell (101) and a sealing plate (102); one end of the shell (101) is provided with a support end (11), and the other end is provided with a support plate end (14); an arc-shaped groove is formed between the support end (11) and the support plate end (14); The sealing plate (102) is sealed and buckled onto the support platform end (11), the support plate end (14) and the shell (101); The arc-shaped groove and the sealing plate (102) form an accommodating space (13).

10. The uncoupled charge auxiliary device according to claim 9, characterized in that: The thickness of the shell (101) and the sealing plate (102) are both 1.5 to 2 mm.

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