Open-air pre-split hole rapid charging system and using method thereof

Abstract

The invention discloses an open-air pre-split hole rapid charging system and a using method thereof, and belongs to the technical field of engineering blasting. The system comprises a supporting unit and at least one filling cloth sleeve, the supporting unit is composed of a flexible supporting cloth sleeve and a plurality of standard supporting rods connected in series in the flexible supporting cloth sleeve, and the filling cloth sleeve is fixedly connected to the outer side of the supporting cloth sleeve and used for filling explosive cartridges. Through modular and flexible design, the problems that traditional bamboo chips are fixed in length, difficult to transport, low in charging efficiency and the like are solved, different hole depths can be rapidly adapted, and transportation and efficient charging are facilitated. The system supports a continuous charging mode and an interval charging mode, the interval assembly can be provided with a bag containing a high-energy combustible agent, the sympathetic detonation effect is enhanced, and blasting energy distribution is accurately controlled. The explosive loading method comprises the steps of supporting unit assembling, explosive cartridge loading, in-hole lowering, remote detonating and the like, operation is easy, convenient and reliable, and the explosive loading method is suitable for various open-air pre-splitting blasting projects and has good application and popularization prospects.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of engineering blasting, in particular to a rapid charging system for open pre-splitting holes and a method of using the same. BACKGROUND

[0002] Pre-splitting blasting is a kind of open deep hole peripheral control blasting technology. First, a large number of blast holes are arranged on the designed excavation boundary, and then, before the initiation of the main blasting area, the pre-splitting blasting is initiated by using uncoupled charging or filling low-power explosives. The pre-splitting blasting can form a continuous pre-splitting crack in the rock mass between the main blasting area and the reserved area, which can effectively block the propagation of the shock wave and stress wave generated by the main blasting area to the reserved rock mass, thereby significantly reducing the damage of blasting operation to the reserved rock mass. Due to its excellent contour control ability and protection effect on the reserved rock mass, the pre-splitting blasting technology is widely used in various rock and soil excavation fields.

[0003] In the prior art, when pre-splitting blasting is performed, the on-site construction generally binds the explosives on bamboo sheets after the pre-splitting hole drilling is completed, connects the detonating cord, and then puts them into the blast hole together. For example, Chinese patent CN110749255A (invention name "pre-splitting blasting charging device and using method", publication date February 4, 2020), CN108917503A (invention name "deep hole horizontal pre-splitting blasting method applied to stone excavation of hydropower station", publication date November 30, 2018), CN116294861A (invention name "segmented pre-splitting blasting method for open pit mine", publication date June 23, 2023), the above patents all use similar explosive filling methods. However, the above existing filling methods have the following obvious shortcomings: 1. The bamboo sheets need to be transported to the construction site, and the different depths of the pre-splitting holes result in different lengths of the required bamboo sheets, making it difficult to achieve standardized production and supply; 2. When the pre-splitting hole is deep, the length of the required bamboo sheet may exceed the carrying size of the conventional transport vehicle, causing transportation difficulties, increasing construction cost and complexity; 3. On-site manual use of insulating tape to bind the detonating cord and explosive cartridges, which is time-consuming and difficult to accurately control the spacing between adjacent explosive cartridges, resulting in poor consistency of the charging spacing, which not only affects the construction efficiency, but also directly leads to unstable pre-splitting surface forming quality and affects the blasting effect.

[0004] Therefore, it is necessary to improve the prior art. SUMMARY

[0005] In view of the above problems existing in the prior art, the present application provides a rapid charging system for open pre-splitting holes and a method of using the same, aiming to solve at least one of the above problems.

[0006] In order to solve the above technical problems, the present application adopts the following technical solutions: The application discloses a quick charging system for open pre-splitting holes, which comprises at least a supporting unit and a filling cloth cover.

[0007] Compared with the prior art, the application has the following advantages: The application adopts a combined flexible cloth cover structure, which is soft, small in size, light in weight and convenient to store. The flexible cloth cover structure comprises a supporting cloth cover and a filling cloth cover for filling the cartridges. The supporting cloth cover can selectively accommodate a plurality of active stringed supporting rods. In use, on one hand, the filling cloth cover allows the cartridges to be quickly filled in the filling cloth cover by throwing, and compared with the previous way of filling and binding the cartridges one by one, the charging rate is greatly improved and the problem of cartridge falling is avoided (in the previous way of binding the cartridges on bamboo sheets, the cartridges are easy to fall off the bamboo sheets, and the cartridges are thrown into the filling cloth cover, so the problem of falling off does not exist); on the other hand, the supporting cloth cover can selectively accommodate or not accommodate the supporting rods according to the actual situation of the hole: for the holes with good hole forming quality and small inclination, the supporting rods do not need to be arranged in the supporting cloth cover, and after charging, the system can be smoothly placed to the bottom of the hole by the weight of the system; for the holes with rough hole wall, large inclination or other requirements (for example, high requirement on the accuracy of the blasting position), a plurality of supporting rods can be stringed in the supporting cloth cover to enhance the rigidity of the overall structure, and the system can be stably and smoothly conveyed to the predetermined position, so that the problem of blockage or inaccurate charging position is effectively avoided. In addition, the supporting cloth cover is adopted, and when the stringed supporting rods are used, the supporting rods can be standard size supporting rods produced in a factory, which are small in size and convenient to transport and store, and can be combined into the required length according to the pre-splitting hole depth in cooperation with the supporting cloth cover on the construction site, so that the construction is more flexible and convenient. In addition, the ropes for binding the cartridges are arranged on the cloth cover in the production stage, so that the insulating tape or additional ropes for binding does not need to be prepared on the construction site. Further, the charging system of the application can continuously charge and interval charge without using the detonating cord, meets the production requirement, the special interval component provides key support for interval charging, ensures the accurate distribution of explosion energy in the time and space dimensions under the condition of sufficient sympathetic detonation distance, and better adapts to the complex rock stratum condition and diversified production blasting requirement. Overall, the technical scheme of the application has obvious advantages in the aspects of convenient transportation, quick construction and charging accuracy compared with the traditional bamboo binding method, and has good engineering application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 Figure 1 is a front view of the structure of the open pre-split hole rapid charging system of the present application; Figure 2 Figure 2 is a cross-sectional view of the filling sleeve and the supporting sleeve of the present application; Figure 1 Figure 3 is a cross-sectional view of the filling sleeve and the supporting sleeve of the present application; Figure 3 Figure 4 is a schematic view of the open pre-split hole rapid charging system of the present application installed in the pre-split hole; Figure 4 Figure 5 is a schematic view of the arrangement of the supporting rods in the sleeve of the present application; Figure 5 Figure 6 is a schematic view of the cartridge mounting structure in the first filling sleeve of the present application; Figure 7 is a schematic view of the cartridge mounting structure in the first filling sleeve of the present application; 1 - supporting sleeve, 2 - first cartridge, 3 - first filling sleeve, 4 - first rope, 5 - second rope, 6 - second cartridge, 7 - annular elastic band, 8 - second filling sleeve, 9 - pre-split hole, 10 - tampon, 11 - buffer hole, 12 - main blast hole, 13 - supporting rod assembly, 14 - connecting part, 131 - first supporting rod, 132 - second supporting rod, 133 - third supporting rod, 201 - cartridge, 202 - spacer sleeve, 203 - pouch. DETAILED DESCRIPTION

[0009] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0010] Referring to Figures 1 to 5 , the present application provides an open pre-split hole rapid charging system, which at least includes a supporting unit and a filling sleeve, wherein the supporting unit includes a (cylindrical) supporting sleeve 1 with a bottom end sealed and a top end open, at least one filling sleeve with a bottom end sealed and a top end open is fixedly connected outside the supporting sleeve 1, the axis of the supporting sleeve 1 is parallel to the axis of the filling sleeve, and a plurality of cartridges for blasting are filled in the filling sleeve. Wherein the supporting sleeve 1 can selectively contain a supporting rod assembly 13 therein, preferably, the supporting rod assembly 13 is formed by a plurality of supporting rods (first supporting rod 131, second supporting rod 132, third supporting rod 133) movably connected in series.

[0011] It should be noted that in the prior art, when carrying out pre-split hole blasting construction, usually after the pre-split hole drilling is completed, the explosive is bound on a bamboo piece and connected with a detonating cord, and then they are put into the blast hole together. This way has many defects, for example, the length of the bamboo piece is not standard, for different sizes of blast holes, some bamboo pieces are too long and some are too short, and in the construction site, it is often necessary to prepare bamboo pieces of various lengths, or to carry out cutting and lengthening operations, which is cumbersome and affects the loading efficiency. In addition, for deep hole blasting, sometimes the required length of the bamboo piece is very long, which may exceed the carrying size of the conventional transport vehicle, causing transportation difficulties, increasing construction cost and complexity.

[0012] The present application adopts a combined flexible cloth cover structure, which can selectively insert or not insert support rods in the support cloth cover according to the actual situation of the blast hole, so that it can more flexibly respond to the site construction situation: for blast holes with good hole forming quality and small inclination, support rods can be selectively not arranged in the support cloth cover, and after charging, the system can be smoothly lowered to the bottom of the hole relying on its own weight (it should be understood that for such blast holes, support rods can also be used, which also belong to the protection scope of the present application); while for blast holes with rough hole wall, large inclination or other requirements (for example, when the accuracy of the blasting position is required to be higher during segmented blasting), multiple support rods can be connected in series in the support cloth cover to enhance the overall structural rigidity, assist the system to be stably and smoothly conveyed to the predetermined position, and effectively avoid blockage or charging failure. When using the scheme of connecting multiple support rods in series (the end face of the support rod does not need to be treated, for example, it can be a flat surface, when the support rod is placed in the support cloth cover 1, it naturally forms a series of connected forms, and the adjacent support rods can move), the multiple support rods can be rigid short rods of standard size (for example, 1 meter or 2 meters or other sizes), which can be disassembled into short rod units during transportation, having small volume and being convenient for transportation and storage; in addition, using this structure, the required length can be quickly connected and combined according to the pre-cracking hole depth on site, which also effectively solves the problems of difficult transportation of long materials and poor adaptability, greatly improves the construction efficiency and reduces the comprehensive cost. The traditional long bamboo piece has large rigidity, and when it is placed in a blast hole with large depth or slight curvature, it is easy to be stuck or broken by the hole wall, resulting in damage to the charging structure or the falling of the cartridge, while the support unit of the active series support rod of the present application has good "flexibility", which can conform to the natural curvature of the blast hole and be smoothly placed in the hole like a "snake", effectively avoiding the risk of hole sticking and structure damage, and ensuring that the designed charging structure can accurately reach the predetermined position. Further, since the existing technology uses a rigid (relatively speaking) long bamboo piece as a support body, the explosive cartridge usually needs to be fixed by manual binding using insulating tape and other materials, if the binding is not firm, the cartridge is easy to fall off the bamboo piece during filling, especially when it is sent into a deep blast hole, the hole wall friction, collision or angle deviation can more easily cause the charging structure to fail, which not only seriously affects the charging efficiency and needs to be reconnected, but also can damage the pre-cracking surface forming quality due to the discontinuity or inaccurate position of the charging body. The present application adopts a flexible filling cloth cover fixed outside the support cloth cover 1, which can directly fill the explosive cartridge in the filling cloth cover during use, and even without binding, there is no problem of explosive cartridge falling off.

[0013] In a preferred embodiment, the packing sleeve comprises a first packing sleeve 3 and a second packing sleeve 8, the second packing sleeve 8 is located at the bottom of the supporting sleeve 1, the first packing sleeve 3 is located above the second packing sleeve 8, and there is a gap between the bottom end of the first packing sleeve 3 and the top end of the second packing sleeve 8, and the diameter of the second packing sleeve 8 is greater than that of the first packing sleeve 3. The purpose of the gap is to facilitate separate charging and operation. Specifically, the gap provides a clear visual distinction and physical operation area for the operator, so that the bottom reinforced section of the cartridge and the upper normal section of the cartridge can be independently and sequentially packed without interfering with each other. By setting the diameter of the second packing sleeve 8 to be greater than that of the first packing sleeve 3, it is helpful to add more explosives (per unit length) or cartridges with larger diameters to the second packing sleeve 8 during charging. This design achieves the reinforcement of the hole bottom charging section, so that the explosion energy is more concentrated, thereby effectively overcoming the huge clamping force on the hole bottom rock mass, avoiding the phenomenon of root bottom (ridge) or insufficient fragmentation at the hole bottom, and ensuring the complete formation quality of the pre-splitting surface from the bottom to the top.

[0014] In a further preferred embodiment, the explosive cartridge in the second packing sleeve 8 is a second cartridge 6, and the explosive cartridge in the first packing sleeve 3 is a first cartridge 2, the diameter of the first cartridge 2 is smaller than the inner diameter of the first packing sleeve 3, and the diameter of the second cartridge 6 is greater than the diameter of the first cartridge 2 and equal to or slightly greater than the inner diameter of the second packing sleeve 8 (due to the flexibility of the sleeve and the cartridge itself, the slightly larger case can achieve more stable packing). It should be noted that the design of the second cartridge 6 with a larger diameter matching the inner diameter of the second packing sleeve 8 has the main purpose of allowing the second cartridge 6 to be tightly contained in the sleeve while forming the bottom reinforced charging section, effectively preventing it from falling off due to shaking or friction during the packing process, and ensuring the reliability and accuracy of the bottom charging structure. On the other hand, a larger diameter means a larger linear charge density, which significantly improves the concentration of hole bottom blasting energy, thereby effectively overcoming the huge clamping force on the hole bottom rock mass and avoiding the formation of underbreak or root ridge. In addition, the diameter of the first cartridge (2) is smaller than the inner diameter of the first packing sleeve (3), and the gap between them provides convenience for the rapid insertion of the cartridge, improving the charging efficiency.

[0015] In a further preferred embodiment, the explosive of the first charge 2 is divided into two kinds, one is high-energy high-density explosive, and the other is low-energy low-density explosive, and the low-energy low-density explosive is arranged above the high-energy high-density explosive. That is to say, two kinds of explosives with different performances are contained in the same first filling sleeve (3). In actual construction, this design corresponds to the differentiated energy requirements of the upper weakened section and the normal section of the pre-split hole charge, the high-energy high-density explosive located below constitutes the normal section of the charge structure, providing the energy required for main rock breaking; and the low-energy low-density explosive located above forms the upper weakened section, which has lower explosion energy and can effectively prevent the rock at the hole opening from being excessively broken or flying stones, ensuring the breaking effect while giving consideration to blasting safety and profile control. This way of integrating two kinds of explosives in the same sleeve not only realizes the reasonable distribution of energy along the hole depth, but also simplifies the on-site charging operation and improves the construction efficiency.

[0016] In order to better achieve the purpose of the present application, an annular elastic band 7, for example, an elastic rubber band, is arranged at the second filling sleeve 8, and the purpose of the arrangement is to further fix the second charge 6 when the second charge 6 is inserted.

[0017] In a further preferred embodiment, a plurality of groups of rope units are evenly distributed along the axial direction of the supporting sleeve 1 at positions corresponding to the first charge sleeve 3 on the supporting sleeve 1, and the rope units can be tied outside the first charge sleeve 3 to further firmly bind the first charge 2 inside the first charge sleeve 3. Preferably, each group of the rope units includes a first rope 4 and a second rope 5, and the first rope 4 and the second rope 5 can be cross-connected like a shoelace to reliably lock the first charge 2 by tightening. It should be noted that although the first charge 2 is designed to be conveniently inserted by means of the gap between the first charge 2 and the inner wall of the first charge sleeve 3 according to the present application, and will not fall off, the gap will cause the first charge 2 to shake in the first charge sleeve 3 during the process of being sent into the blast hole. The shaking of the charge will easily cause the entire charging device to be unstable in posture when being lowered into the hole, and then unnecessary collision and friction with the hole wall will occur, which will not only hinder the device from smoothly reaching the predetermined position to some extent, but also may cause local damage or deviation of the charging structure from the designed position due to repeated bumps. The tightening effect of the rope units is to eliminate the shaking caused by the gap and ensure that the charging device is smoothly lowered into the hole in a compact and stable form, so as to ultimately guarantee the accuracy of the charging position and the blasting reliability. Since the supporting sleeve 1 is made of flexible cloth material, the rope units can be pre-sewn or fixed on the corresponding positions of the supporting sleeve 1 before leaving the factory, and there is no need to prepare, process or assemble temporarily on the construction site, which not only reduces the types and quantities of scattered accessories that need to be carried on the site, but also completely avoids the installation errors or low efficiency caused by the lack of operation proficiency of the site personnel, further improving the standardization level of construction and the charging efficiency.

[0018] In some embodiments, the first charge 2 and the second charge 6 are allowed to at least partially extend out of the top opening of the corresponding sleeve, as shown in Figure 1 which should ensure that the top end of the second charge 6 and the bottom end of the first charge sleeve 3 located above it maintain a gap L at least, so as to reduce the adverse effects on the second charge 6 as much as possible when the first charge falls (the setting of L should not affect the sympathetic detonation).

[0019] In a preferred embodiment, the support cloth cover 1 and the filling cloth cover are connected by a connecting part 12, and all of them are made of pure cotton cloth. The connecting part 12 plays a good “decoupling” role between the support cloth cover 1 and the filling cloth cover through its flexible connection characteristics, effectively isolates the interference of the shape change of the support rod on the loading state of the cartridge, and is an important design to ensure the overall reliability of the charging device and the consistency of the blasting effect. Pure cotton cloth has good anti-static properties, can effectively reduce the potential risks brought by frictional electrification, meets the safety requirements of blasting operations, and has flexibility and certain wear resistance, which can not only ensure smooth lowering of the device in the hole, but also withstand friction and tension during the charging process, ensuring the reliability of repeated use.

[0020] In some embodiments, the first cartridge 2 comprises a plurality of charge packs 201 (made before leaving the factory, similar in shape to a common ham sausage) connected in series, thereby forming a continuous charge structure adjacent to each other. In other more preferred embodiments, a spacing assembly is also provided between adjacent charge packs 201, which comprises a spacing sleeve 202 and at least one bag 203 provided in the spacing sleeve 202, the bag 203 containing air and a small amount of high-energy combustible agent (for example, a mixture of aluminum powder and carbon powder, the specific amount and ratio being determined according to actual needs on site). Among them, the outer diameter of the spacing sleeve 202 is consistent (equal) with the outer diameter of the charge pack 201, and the bag 203 is completely contained in the hole of the spacing sleeve 202, thereby maintaining the smoothness and consistency of the overall charge structure. The introduction of this spacing assembly converts the originally completely continuous charge column into a precisely controllable spaced charge structure; on the one hand, it directly reduces the total amount of explosive in the unit length of the blast hole, while meeting the engineering crushing requirements, significantly reducing the explosive consumption and the corresponding cost, and effectively reducing the blasting disturbance and damage to the rock mass in the reserved area, showing good economy and environmental protection; on the other hand, this structure optimizes the release distribution of blasting energy, and improves the precision of blasting operation. It should be noted that the spacing sleeve 202 is located between adjacent charge packs 201, and when the charge pack 201 is put into the first filling cloth cover 3, the spacing sleeve 202 provides effective support for the charge pack 201 above, ensuring the overall smoothness of the charge structure, and at the same time, the bag 203 is completely contained in the spacing sleeve 202, which makes the spacing sleeve 202 not only play a supporting role, but also protect the internal bag 203 from being accidentally broken due to impact during the filling process. The high-energy combustible agent in the protected bag 203 helps to increase the sympathetic detonation distance. Both of them are indispensable when used together, for example, if the spacing sleeve 202 is missing, it will be difficult to ensure the smoothness and straightness of the charge structure when the charge pack 201 is put into the filling cloth cover, and the bag 203 is also easily broken due to lack of external protection during the filling process, resulting in leakage of high-energy combustible agent, thereby failing to achieve the expected energy enhancement and sympathetic detonation distance improvement effect. If only the spacing sleeve 202 is used without the bag 203, the sympathetic detonation distance between adjacent charge packs 201 is limited, making it difficult to achieve effective energy enhancement and stress wave superposition control. It is worth noting that because the spacing sleeve 202 provides good mechanical protection for the bag 203, it is not easy to be damaged during filling and lowering, so the number of bags 203 can be set to multiple according to the needs of blasting energy design, and multiple bags 203 can be distributed axially along the spacing sleeve 202, thereby further improving the sympathetic detonation distance and breaking effect through joint action.

[0021] Figure 3A schematic structure of the installation of the open pit pre-splitting hole rapid charging system is shown. The system also comprises a tampon 10 which is blocked at the hole opening part of the pre-splitting hole 9. The pre-splitting hole 9 is arranged in an inclined manner at one side of the buffer hole 11 and the main blasting hole 12. After the charging system of the present application is charged and detonated in the pre-splitting hole, a pre-splitting crack can be formed in the rock mass between the blasting area and the reserved area, which can effectively block or weaken the impact of the stress wave generated by the subsequent main blasting hole blasting on the rock mass of the reserved area.

[0022] Further, since the present application adopts the filling sleeve structure and fills the explosive cartridge by the dropping method, if the charging form adopts the detonating cord initiation, the detonating cord is easy to be damaged due to friction and collision during the cartridge dropping process, thereby affecting the initiation reliability. Therefore, in a preferred embodiment, the wireless industrial electronic detonator is arranged at the second cartridge 6 of the present application, and the reliable initiation can be achieved through the remote signal control (the wireless industrial electronic detonator itself is the prior art, and will not be described here). In addition, the wireless industrial electronic detonator is arranged at the second cartridge 6 mainly based on the following consideration: the second cartridge is located at the bottom of the charging structure, the energy is concentrated, it is the core charging section of forming the key crack at the hole bottom and providing sufficient conditions for the upper blasting, the wireless industrial electronic detonator arranged at this position can ensure that the bottom charging is accurately and reliably detonated, thereby providing a stable initiation base point for the formation of the whole pre-splitting surface; at the same time, the wireless industrial electronic detonator can be triggered remotely through wireless signal, which avoids the operation risk and reliability problem caused by the traditional detonating cord penetrating the charging structure, and is more suitable for the filling sleeve dropping type charging process of the present application.

[0023] It should be further noted that the drawings are only schematic and do not represent the actual shape, for example, the support rod assembly 13 is shown as a circle in the figure, but in actual construction, it can adopt a rectangular or other shape, and similar situations can exist for the remaining parts, which will not be further described here.

[0024] In a preferred embodiment, the open pit pre-splitting hole rapid charging system further comprises a cross bar at the hole opening position, and the cross bar is connected with the support sleeve 1. The core role of the cross bar is to reliably fix the support sleeve 1 at the hole opening. Specifically: when the support sleeve 1 is not provided with the support rod, the overall flexibility of the system is large, and the cross bar mainly plays a role of bearing suspension in this case, so as to ensure that the charging system can be smoothly and vertically dropped by relying on the dead weight, and the cartridge is distributed at the predetermined position in the hole. When the support sleeve 1 is provided with the support rod, the system has a certain overall rigidity. At this time, the function of the cross bar is focused on radial positioning and auxiliary guiding, which cooperates with the support rod to jointly limit the transverse swing of the system at the hole opening, so that the system is more stably distributed in the pre-splitting hole.

[0025] It should be understood that the present application also relates to a method for using the open pre-splitting hole rapid charging system, which is achieved by using the open pre-splitting hole rapid charging system described above, and the method comprises the following steps: Step S1, a plurality of support rods (such as first support rod 131, second support rod 132, third support rod 133,...) are sequentially put into the support sleeve 1 from the top opening of the support sleeve 1, i.e. the pouring port, the plurality of support rods are accommodated in the support sleeve 1 and form a movable string connection, after the total length of the support rods in the movable string connection reaches a predetermined requirement, the support sleeve 1 at the top end of the string connection support rod is tied with a rope, thereby forming a "flexible" support unit with an overall structure that can be bent; it should be noted that this step S1 is optional, for blast holes with good hole forming quality and small inclination, sometimes no support rod needs to be arranged in the support sleeve, and after charging is completed, it can be smoothly lowered to the bottom of the hole by relying on the weight of the system; Step S2, the second charge 6 is filled into the second filling sleeve 8, and it is stably fixed at the bottom of the support sleeve 1 by using the diameter matching relationship (this process can further use the annular elastic band 7, and the second charge 6 is provided with a wireless industrial electronic detonator); Step S3, the first charge 2 is sequentially filled into the first filling sleeve 3; the first charge 2 adopts continuous charging or interval charging, wherein the continuous charging means that the first charge 2 adopts a plurality of charge packs 201 arranged in sequence and adjacent to each other; the interval charging means that at least one interval assembly is arranged between adjacent charge packs 201 in the plurality of charge packs 201 arranged in sequence, the interval assembly comprises an interval sleeve 202 and at least one bag 203 completely accommodated in the interval sleeve 202, and the bag 203 contains air and a small amount of high-energy combustible agent; during or after the filling process, the first rope 4 and the second rope 5 (if any) are crossed and tightly bound to further fasten the charge; Step S4, put into the hole: slowly and smoothly put the overall structure assembled and charged into the pre-splitting hole 9, and utilize the flexibility of the support unit to bend along the hole, so as to avoid jamming or collision; the hole of the pre-splitting hole 9 is sealed by using the plug 10 such as stemming.

[0026] Further preferably, in step S3, when filling the first charge 2, the high-energy high-density explosive is partially placed in the lower part, and the low-energy low-density explosive is partially placed in the upper part, so as to meet the energy requirement of different hole depth sections.

[0027] Further preferably, during the filling process, a gap L (the value of L is controlled within the range of the explosive sympathetic detonation distance) is ensured between the top end of the second charge 6 and the bottom end of the first filling sleeve 3, so as to prevent the upper charging operation from impacting the bottom charge.

[0028] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A rapid charging system for open-pit pre-splitting holes, comprising at least a support unit and a charging fabric sleeve, characterized in that, The support unit includes a support cloth sleeve (1) with a sealed bottom and an open top. At least one filling cloth sleeve with a sealed bottom and an open top is fixedly connected to the outside of the support cloth sleeve (1). The support cloth sleeve (1) is parallel to the axis of the filling cloth sleeve. The filling cloth sleeve is filled with multiple explosive cartridges for blasting.

2. The rapid charging system for open-pit pre-splitting holes as described in claim 1, characterized in that, The support sleeve (1) can selectively contain multiple movable support rods connected in series within its contents.

3. The rapid charging system for open-pit pre-splitting holes as described in claim 2, characterized in that, The filling cloth sleeve includes a first filling cloth sleeve (3) and a second filling cloth sleeve (8). The second filling cloth sleeve (8) is located at the bottom of the supporting cloth sleeve (1), and the first filling cloth sleeve (3) is located above the second filling cloth sleeve (8). There is a gap between the bottom end of the first filling cloth sleeve (3) and the top end of the second filling cloth sleeve (8). The diameter of the second filling cloth sleeve (8) is larger than that of the first filling cloth sleeve (3).

4. The rapid charging system for open-pit pre-splitting holes as described in claim 3, characterized in that, The explosive cartridge in the second filling sleeve (8) is the second cartridge (6), and the explosive cartridge in the first filling sleeve (3) is the first cartridge (2). The diameter of the first cartridge (2) is smaller than the inner diameter of the first filling sleeve (3), and the diameter of the second cartridge (6) is larger than the diameter of the first cartridge (2) and is greater than or equal to the inner diameter of the second filling sleeve (8).

5. A rapid charging system for open-air pre-splitting holes as described in claim 1, 2, or 3, characterized in that, At the position corresponding to the first filling cloth sleeve (3) on the support cloth sleeve (1), multiple sets of rope units are evenly distributed along the axial direction of the support cloth sleeve (1), and each set of rope units includes a first rope (4) and a second rope (5).

6. The rapid charging system for open-pit pre-splitting holes as described in claim 5, characterized in that, The first drug roll (2) includes a plurality of drug packs (201) connected in series. A spacer assembly is provided between adjacent drug packs (201). The spacer assembly includes a spacer sleeve (202) and at least one pouch (203) disposed in the spacer sleeve (202). The pouch (203) contains air and a small amount of high-energy flammable agent.

7. The rapid charging system for open-pit pre-splitting holes as described in claim 6, characterized in that, The sac (203) is completely contained within the hole of the spacer sleeve (202).

8. A method of using an open-pit pre-splitting hole rapid charging system, which is implemented using any one of claims 3-5, characterized in that, The method includes the following steps: Step S2: Fill the second medicine roll (6) into the second filling cloth sleeve (8), and use the diameter matching relationship to firmly fix the second medicine roll (6) to the bottom of the support cloth sleeve (1); Step S3: Fill the first medicine roll (2) into the first filling cloth cover (3) in sequence. The first medicine roll (2) is continuously filled, that is, the first medicine roll (2) is set up with multiple medicine bags (201) connected in series. During or after filling, the corresponding first rope (4) and second rope (5) are crossed and tightened to further secure the medicine roll. Step S4: Slowly and steadily place the assembled and loaded structure into the pre-splitting hole (8), and seal the opening of the pre-splitting hole (8) with a plug (10).

9. A method of using an open-pit pre-splitting hole rapid charging system, which is implemented using any one of claims 3-7, characterized in that, The method includes the following steps: Step S2: Fill the second medicine roll (6) into the second filling cloth sleeve (8), and use the diameter matching relationship to firmly fix the second medicine roll (6) to the bottom of the support cloth sleeve (1); Step S3: Fill the first medicine roll (2) into the first filling cloth cover (3) in sequence. The first medicine roll (2) is filled with medicine at intervals. That is, in the multiple medicine packs (201) connected in sequence, there are spacers between adjacent medicine packs (201). During or after filling, the corresponding first rope (4) and second rope (5) are crossed and tightened to further secure the medicine roll. Step S4: Slowly and steadily place the assembled and loaded structure into the pre-splitting hole (8), and seal the opening of the pre-splitting hole (8) with a plug (10).

10. The method of using the rapid charging system for open-air pre-splitting holes as described in claim 8 or 9, characterized in that, Before step S2, step S1 is also included: inserting multiple support rods into the support cloth sleeve (1) from the top opening of the support cloth sleeve (1) in sequence. The multiple support rods are housed in the support cloth sleeve (1) and form a movable series connection. After the total length of the movable series support rods reaches the predetermined requirement, the support cloth sleeve (1) at the top of the series support rods is tied with ropes, thereby forming an integral structure flexible support unit.

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