A device for controlling vibration of rock burst interval charging in a karst open-pit mine

Abstract

The utility model relates to mine blasting interval charging equipment technical field especially relates to a karst area strip mine blasting interval charging vibration control device. Its technical scheme includes gas spacer, the inside of gas spacer is equipped with aerosol tank, one end of gas spacer is equipped with the switch pull rope of opening aerosol tank after pulling, still includes the support pull rope of fixed connection in one end of gas spacer and switch pull rope corresponds, the outside of switch pull rope and support pull rope is equipped with the take -up sleeve of wire, one end of the gas spacer of taking off the gas spacer of tightening band is put into the blast hole, and the gravity of the support pole, the connecting counterweight plate and the conical counterweight hanging piece is borrowed, ensures its perpendicular smooth down, the speed is controlled when down, the take -up sleeve of wire and support pull rope are straight, switch pull rope and arc pull rope are curved, and then avoid the additional inertia force that the speed uneven brings aerosol tank, prevent accidental touch opening, and simultaneously can also realize the purpose of safe interval charging.

Description

Technical Field

[0001] This utility model relates to the technical field of interval charging equipment for mine blasting, and in particular to a vibration control device for interval charging in open-pit mines in karst areas. Background Technology

[0002] In blasting operations in open-pit mines in karst areas, the presence of numerous caves and fissures in the rock strata makes traditional coupled-charge methods prone to concentrated explosion pressure. This leads to excessive rock vibration, cave collapse, fissure expansion, and fragmentation of the ore and rock, exacerbating slope instability risks, wasting ore, and blocking cave passages. Therefore, interval-charge vibration control devices are needed to balance vibration management with operational safety and efficiency. Gas spacers, by buffering the explosion pressure within the holes through air gaps and dispersing energy release in layers, possess characteristics such as stable load-bearing capacity, adaptability to complex rock compression environments, and seamless integration with existing perforated charging and sequential detonation technologies. They perfectly meet the multiple requirements of vibration control, blasting effect, and operational efficiency in karst areas, thus becoming the core interval-charge vibration control device. Currently, gas spacers that are manually opened by pulling a rope are typically pull-up gas spacers. These pull-up gas spacers mainly consist of a folded gas bag containing an aerosol can, with a lifting rope attached to the outside of the gas bag and a counterweight attached to the bottom of the aerosol can. When in use, first use a rope to lower it into the predetermined depth inside the blast hole, then pull up the rope of the exposed part of the blast hole opening, and then quickly lower it. The aerosol can is pushed down by the weight of the counterweight, and the aerosol valve opens under the action of inertial force, the liquid in the can is sprayed out and vaporized, and the gas bag quickly expands to achieve intermittent loading.

[0003] In existing technologies, when placing a pull-up gas spacer into the rupture hole, on the one hand, the spacer is prone to shaking during the lowering process due to the operator's technique. If the shaking amplitude is too large, the aerosol can, under the action of the counterweight, can easily generate an inertial force similar to that of a rapid lowering after being pulled up, which can lead to the accidental opening of the aerosol valve and premature inflation of the gas bag. On the other hand, if the speed of the lowering rope is uneven, with sudden acceleration or deceleration, it will also bring additional inertial force to the aerosol can. For example, when suddenly accelerating downwards, the aerosol can will move upwards due to inertia, and when suddenly decelerating, it will move downwards due to inertia. Both of these situations can easily cause the aerosol valve to open, resulting in the spacer opening accidentally. Utility Model Content

[0004] The purpose of this invention is to address the problem in the existing technology where, when placing a pull-type gas spacer into a blast hole, the shaking caused by the operator's handling and the uneven speed of the lowering rope can easily lead to accidental activation. This invention proposes a vibration control device for blasting interval charging in open-pit mines in karst areas.

[0005] The technical solution of this utility model is as follows: A vibration control device for blasting interval charging in open-pit mines in karst areas, comprising a gas spacer, wherein an aerosol can is provided inside the gas spacer, and a switch pull rope is provided at one end of the gas spacer to open the aerosol can when pulled. It also includes: a support pull rope fixedly connected to one end of the gas spacer corresponding to the switch pull rope; a take-up and release sleeve is sleeved around the switch pull rope and the support pull rope; and an anti-accidental contact mechanism installed at the end of the take-up and release sleeve away from the gas spacer, the anti-accidental contact mechanism being used to keep the switch pull rope in a bent state.

[0006] Optionally, the anti-accidental contact mechanism includes a connector, which is fixedly connected to one end of the switch pull rope and the support pull rope. A connecting rod is slidably inserted inside the connector. An arc-shaped pull rope is fixedly connected to the end of the switch pull rope away from the gas separator. The end of the arc-shaped pull rope away from the switch pull rope is fixedly connected to the end of the connecting rod.

[0007] Optionally, the anti-accidental contact mechanism further includes a support retaining ring fixedly sleeved on one end of the connecting rod near the arc-shaped pull rope. A return spring is also movably sleeved on one end of the connecting rod near the support retaining ring. One end of the return spring is fixedly connected to the connecting head, and the other end of the return spring is fixedly connected to the support retaining ring.

[0008] Optionally, a spherical pull block is fixedly connected to one end of the connecting rod that movably passes through the connector.

[0009] Optionally, the end of the take-up / release sleeve away from the gas spacer is fixedly connected to the connector, and the end of the take-up / release sleeve away from the connector is fixedly connected to a connecting cover, which is also fixedly connected to the gas spacer.

[0010] Optionally, a support rod is fixedly connected to the end of the gas separator away from the take-up and release sleeve, a connecting counterweight plate is fixedly connected to the outer wall of the support rod, and a conical counterweight block is fixedly connected to the connecting counterweight plate.

[0011] Optionally, both ends of the gas separator are movably fitted with tightening straps for binding and releasing the cable sleeve.

[0012] In summary, this application includes at least one of the following beneficial technical effects:

[0013] This invention utilizes a combination of a gas spacer, an anti-accidental activation mechanism, a conical counterweight block, and a take-up / deployment sleeve. When using the device, the end of the gas spacer (with the fastening strap removed) furthest from the take-up / deployment sleeve is placed into the rupture hole. The weight of the support rod, connecting counterweight plate, and conical counterweight block ensures a smooth and vertical descent. During descent, the take-up / deployment sleeve is held to control the speed. The take-up / deployment sleeve and support rope remain taut, while the switch rope and curved rope bend, thus preventing uneven speed from causing additional inertial force on the aerosol can and preventing accidental activation. After lowering to the predetermined depth, pulling the spherical block, via the connecting rod, drives the curved rope and switch rope. Once the support retainer compresses the return spring to its limit, the switch rope triggers the aerosol can, causing the liquid to vaporize and expand the gas bag, achieving safe, spaced loading of the aerosol. Attached Figure Description

[0014] Figure 1 A structural schematic diagram of a vibration control device for interval charging in blasting in open-pit mines in karst areas, according to this utility model, is provided.

[0015] Figure 2 for Figure 1 Partial structural diagram;

[0016] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4 for Figure 2 A partial structural diagram.

[0018] Reference numerals: 1. Gas separator; 11. Support rod; 12. Connecting counterweight plate; 13. Conical counterweight lifting block; 2. Cable retraction sleeve; 21. Connecting cover; 22. Switch pull rope; 23. Support pull rope; 24. Arc pull rope; 25. Connector; 26. Spherical pull block; 27. Support retaining ring; 28. Connecting rod; 29. ​​Return spring; 3. Fastening strap; 4. Aerosol can. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0020] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0021] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Example

[0026] like Figures 1 to 4As shown, this utility model proposes a vibration control device for blasting interval charging in karst open-pit mines, comprising a gas spacer 1. Both ends of the gas spacer 1 are movably fitted with tightening straps 3 for binding and releasing cable sleeves 2. When not in use, the tightening straps 3 bind the cable sleeves 2 to prevent them from loosening; when in use, they are removed to unlock the cable sleeves 2. An aerosol can 4 is located inside the gas spacer 1. When the aerosol can 4 is triggered by a switch pull rope 22, the liquid inside the can is sprayed out and rapidly vaporized, causing the gas bag inside the gas spacer 1 to expand and form an air gap layer. One end of the gas spacer 1 is equipped with a switch pull rope 22 that opens the aerosol can 4 when pulled. Pulling the switch pull rope 22 triggers the aerosol can 4, causing the liquid inside to spray out and vaporize. One end of the gas spacer 1 is fixedly connected to a support pull rope 23 corresponding to the switch pull rope 22. Cable release sleeves 2 are fitted around the switch pull rope 22 and the support pull rope 23. The switch pull rope 22 and the support pull rope 23 are set to the corresponding lengths as required, but the total length of the arc pull rope 24 and the switch pull rope 22 is greater than the take-up and release sleeve 2 or the support pull rope 23. The take-up and release sleeve 2 and the support pull rope 23 are the same length.

[0027] Among them, such as Figure 1 , Figure 2 and Figure 4 As shown, an anti-accidental activation mechanism is installed at the end of the retractable cable sleeve 2 away from the gas separator 1. This mechanism keeps the switch pull cord 22 in a bent state. The anti-accidental activation mechanism includes a connector 25, with a connecting rod 28 slidably inserted inside, providing a mounting and movement base for the various components of the mechanism. The connector 25 is fixedly connected to one end of the switch pull cord 22 and the support pull cord 23. The connecting rod 28 is slidably inserted inside the connector 25, transmitting the pulling force of the spherical pull block 26 to the curved pull cord 24, and can be reset by the action of the return spring 29. The end of the switch pull cord 22 away from the gas separator 1 is fixedly connected to the curved pull cord 24, which transmits the pulling force of the connecting rod 28 to the switch pull cord 22 and is bent when lowered to avoid accidental activation. The end of the arc-shaped pull rope 24 away from the switch pull rope 22 is fixedly connected to the end of the connecting rod 28. The end of the connecting rod 28 that movably passes through the connector 25 is fixedly connected to a spherical pull block 26. The spherical pull block 26 is pulled by the operator to move the connecting rod 28, making it easy to apply pulling force.

[0028] In addition, such as Figure 4As shown, the anti-accidental contact mechanism also includes a support retaining ring 27 fixedly sleeved on one end of the connecting rod 28 near the arc-shaped pull rope 24. When the support retaining ring 27 moves with the connecting rod 28, it can compress the return spring 29, simultaneously limiting the position of the return spring 29. A return spring 29 is also movably sleeved on one end of the connecting rod 28 near the support retaining ring 27. When the return spring 29 is compressed by the support retaining ring 27, it generates elastic force, causing the connecting rod 28 to return to its original position. One end of the return spring 29 is fixedly connected to the connector 25, and the other end of the return spring 29 is fixedly connected to the support retaining ring 27.

[0029] It is worth noting that, such as Figure 1 , Figure 2 and Figure 4 As shown, the end of the take-up sleeve 2 away from the gas separator 1 is fixedly connected to the connector 25, and the end of the take-up sleeve 2 away from the connector 25 is fixedly connected to the connecting cover 21. The connecting cover 21 achieves a stable connection between the take-up sleeve 2 and the gas separator 1. The connecting cover 21 is also fixedly connected to the gas separator 1.

[0030] Furthermore, such as Figure 1 and Figure 2 As shown, a support rod 11 is fixedly connected to the end of the gas compartment 1 furthest from the take-up / delivery sleeve 2. The support rod 11 provides mounting support for the connecting counterweight plate 12. The connecting counterweight plate 12 is fixedly connected to the outer wall of the support rod 11. The connecting counterweight plate 12, through its own weight and in conjunction with the conical counterweight lifting block 13, ensures that the gas compartment 1 is lowered vertically and smoothly within the rupture hole. The conical counterweight lifting block 13 is also fixedly connected to the connecting counterweight plate 12. The conical counterweight lifting block 13, with its own weight, assists the connecting counterweight plate 12 in ensuring that the gas compartment 1 is lowered vertically and reducing shaking during lowering.

[0031] In this embodiment, when using the vibration control device for interval charging in karst open-pit mine blasting, first remove a pair of tightening straps 3 from the gas spacer 1 to allow the take-up and release sleeve 2 to be untied. Then, insert the end of the gas spacer 1 near the support rod 11 into the blasting hole. Subsequently, the gravity of the connecting counterweight plate 12 on the support rod 11 and the conical counterweight lifting block 13 ensures that the gas spacer 1 is lowered vertically into the hole, reducing the risk of accidental activation due to tilting.

[0032] Subsequently, by holding the take-up and release sleeve 2, the gas compartment 1 is lowered into the blast hole. During the lowering process, the take-up and release sleeve 2 and the support pull rope 23 remain taut, while the switch pull rope 22 and the arc pull rope 24 inside the take-up and release sleeve 2 remain bent. This prevents additional inertial forces caused by uneven operating speed and avoids premature triggering of the aerosol can 4. After the gas compartment 1 is lowered to the designated position in the blast hole, the ball pull block 26 is pulled, which drives the arc pull rope 24 and the switch pull rope 22 through the connecting rod 28. When the connecting rod 28 drives the support retaining ring 27 to compress the return spring 29 to its limit, the arc pull rope 24 and the switch pull rope 22 are taut. At this time, the switch pull rope 22 will also pull the aerosol can 4 inside the gas compartment 1 to open. The liquid in the aerosol can 4 is sprayed out and vaporized, causing the gas bag inside the gas compartment 1 to expand rapidly, forming an air gap to buffer the explosion pressure.

[0033] The preferred embodiments of this utility model described above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A vibration control device for blasting interval charging in an open-pit mine in a karst area, comprising a gas spacer (1), wherein an aerosol canister (4) is provided inside the gas spacer (1), and one end of the gas spacer (1) is provided with a switch pull rope (22) that opens the aerosol canister (4) by pulling, characterized in that, Also includes: A support pull rope (23) is fixedly connected to one end of the gas separator (1) and corresponds to the switch pull rope (22). The switch pull rope (22) and the support pull rope (23) are fitted with a take-up and release sleeve (2). An anti-accidental-touch mechanism is installed at the end of the take-up and release sleeve (2) away from the gas spacer (1). The anti-accidental-touch mechanism is used to keep the switch pull cord (22) in a bent state.

2. The vibration control device for interval charging in blasting in open-pit mines in karst areas according to claim 1, characterized in that, The anti-accidental contact mechanism includes a connector (25), which is fixedly connected to one end of the switch pull rope (22) and the support pull rope (23). A connecting rod (28) is slidably inserted inside the connector (25). An arc-shaped pull rope (24) is fixedly connected to one end of the switch pull rope (22) away from the gas separator (1). The end of the arc-shaped pull rope (24) away from the switch pull rope (22) is fixedly connected to the end of the connecting rod (28).

3. The vibration control device for interval charging in blasting in open-pit mines in karst areas according to claim 2, characterized in that, The anti-accidental touch mechanism also includes a support ring (27) fixedly sleeved on one end of the connecting rod (28) near the arc-shaped pull rope (24). A reset spring (29) is also movably sleeved on one end of the connecting rod (28) near the support ring (27). One end of the reset spring (29) is fixedly connected to the connector (25), and the other end of the reset spring (29) is fixedly connected to the support ring (27).

4. The vibration control device for interval charging in blasting in open-pit mines in karst areas according to claim 2, characterized in that, The connecting rod (28) is movably connected to a spherical pull block (26) at one end of the connector (25).

5. A vibration control device for interval charging in blasting in open-pit mines in karst areas according to claim 2, characterized in that, The end of the take-up sleeve (2) away from the gas spacer (1) is fixedly connected to the connector (25), and the end of the take-up sleeve (2) away from the connector (25) is fixedly connected to the connecting cover (21), which is also fixedly connected to the gas spacer (1).

6. The vibration control device for interval charging in blasting in open-pit mines in karst areas according to claim 1, characterized in that, The gas separator (1) is fixedly connected to a support rod (11) at one end away from the take-up and release sleeve (2). A connecting counterweight plate (12) is fixedly connected to the outer wall of the support rod (11). A conical counterweight block (13) is also fixedly connected to the connecting counterweight plate (12).

7. The vibration control device for interval charging in blasting in open-pit mines in karst areas according to claim 1, characterized in that, Both ends of the gas spacer (1) are movably fitted with tightening straps (3) for binding and releasing cable sleeves (2).

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