Method for radial water coupling of blast charge with adjustable medium ring width

Abstract

The application discloses a kind of medium ring width adjustable radial water coupling blasting charge method, it is related to the technical field of seismic exploration, comprising the following steps: S1, the bottom of cylindrical film is inwardly folded to form the first film bag with inner layer film and outer layer film;S2, the explosive required by blasting construction is placed in the inner layer film, a part of the required water medium is added in the interlayer formed between the outer side of the inner layer film and the inner side of the outer layer film;S3, take a shell plate, the both ends of shell plate are bent and wrapped in the outer side of outer layer film, the adjustment of the size of the overlapping area of the both ends of shell plate is realized to adjust the wrapped inner diameter size formed by shell plate, the inner side wall of shell plate is tightly attached to the outer side of outer layer film, and the wrapped shape of shell plate is fixed by a plurality of fasteners;S4, the remaining part of the required water medium is continuously added to the interlayer formed between the outer side of the inner layer film and the inner side of the outer layer film, and sealed.The realization medium ring width adjustable, reduce the film breakage condition occurs.

Description

Technical Field

[0001] This invention relates to the field of seismic exploration technology, and in particular to a radial water-coupled explosive charging method with adjustable medium annulus width. Background Technology

[0002] Currently, the mainstream exploration method remains using blasting to generate artificial seismic waves and observing and analyzing their propagation patterns underground by leveraging differences in the elasticity and density of the subsurface medium to infer the properties and morphology of underground rock strata. However, in this method, only a small portion of the energy released by the explosion is converted into seismic waves. This percentage varies depending on the propagation medium; studies show it to be 2%–3% in dry soil, 5%–6% in wet soil, and up to 20% in water. Therefore, radial water-coupled blasting has become a promising, emerging, efficient, and economical blasting method.

[0003] In existing seismic exploration, the radial water-coupled explosive charging method involves folding the bottom of a cylindrical polyethylene film with openings at both ends inward, placing the explosive inside the inner film tube, and using water between the two films to form a medium. The entire assembly is then placed in the blast hole.

[0004] However, due to the weight of the water medium and the toughness and plasticity of the outer membrane, the water medium will accumulate at the bottom of the outer membrane, resulting in uneven distribution of the water medium within the outer membrane. The lower part of the outer membrane expands outward, and the size of the expansion cannot be controlled, making it inconvenient to place it in the blast hole. There are problems such as non-standard drilling by construction workers, poor compatibility between the existing charging method and the actual blast hole, and the inability to accurately adjust the diameter ratio of the water medium to the blast hole or explosive. In addition, in actual on-site charging, if a polyethylene membrane is used to hold the water medium, there is also the problem that the polyethylene membrane may be punctured or torn by protruding rock tips such as bedrock or calcareous layers in the borehole wall, resulting in partial loss of the water medium. Summary of the Invention

[0005] The purpose of this invention is to provide a radial water-coupled explosive charging method with adjustable medium ring width to solve the problems existing in the prior art, realize the adjustable medium ring width, enable the water medium to be better evenly distributed on the outer circumference of the explosive, improve its smooth release in the blast hole, and reduce the occurrence of film damage.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] This invention provides a radial water-coupled explosive charging method with adjustable medium ring width, comprising the following steps:

[0008] S1, fold the bottom of the cylindrical film with openings at both ends inward to form a first film bag with an inner film and an outer film;

[0009] S2, place the explosives required for blasting operations inside the inner membrane of the first thin film bag, and add 1 / 4 to 3 / 4 of the required water medium to the interlayer formed between the outer side of the inner membrane and the inner side of the outer membrane;

[0010] S3, take a flat outer shell, bend both ends of the flat outer shell and wrap it around the outside of the outer membrane. Adjust the size of the overlapping area at both ends of the flat outer shell to adjust the inner diameter of the wrap formed by the flat outer shell, so that the inner wall of the flat outer shell is tightly attached to the outside of the outer membrane, and fix the wrapping shape of the flat outer shell with multiple fasteners.

[0011] S4. Continue to add the remaining portion of the required water medium into the interlayer formed between the outer side of the inner membrane and the inner side of the outer membrane, and then seal it.

[0012] Preferably, the method further includes step S5, in which the integral formed in step S4 is placed in a second film bag, wherein the outer diameter of the second film bag is smaller than the inner diameter of the rupture hole.

[0013] Preferably, the outer shell plate is provided with a plurality of hooping ridges, each hooping ridge group including at least two hooping ridges; after the outer shell plate is wrapped around the outer membrane, each hooping ridge is perpendicular to the axis of the explosive and each hooping ridge protrudes outward toward the side away from the explosive; a hooping groove is formed between two adjacent hooping ridges in the same hooping ridge group, and a fastener is fixed in each hooping groove and / or between two adjacent hooping ridge groups.

[0014] Preferably, each of the hoop-raising ridges has a scale line along the extension direction of the hoop-raising ridge.

[0015] Preferably, the fastener is double-sided foam tape, and the closed end of the double-sided foam tape avoids the closed part of the outer shell plate.

[0016] Preferably, the outer shell plate is made of PET material.

[0017] Preferably, in the axial direction of the explosive, the upper ends of the first and second film bags, which are longer than the explosive, are sealed and fixed by wrapping and knotting the detonator coating wire of the explosive.

[0018] Preferably, the double-sided adhesive for the foam is high-density EVA foam.

[0019] Preferably, the starting 0 mark of each of the scale lines is located on the same side, and after the outer shell plate is wrapped in the outer film, the end of the outer shell plate with the starting 0 mark is located on the side of the outer shell plate opposite to the explosive.

[0020] The present invention achieves the following technical effects compared to the prior art:

[0021] The radial water-coupled explosive charging method with adjustable media ring width provided by this invention utilizes an outer shell plate that can be folded circumferentially to adjust the ring width ratio between media and counteract the gravity accumulation of water under the outer membrane, ensuring uniform distribution of the water medium around the explosive radially. Due to the incompressibility, high density, and high viscosity of water, the expansion rate of detonation products in water is slow, resulting in a high intensity and long duration of the explosive shock wave generated in the coupled water. This improves energy utilization, allowing more energy to be applied to the elastic zone, forming a stronger seismic wave. Utilizing the lightweight and highly flexible characteristics of the membrane, it can not only hold the water medium and explosive but also use water-side pressure to adhere the inner membrane to the explosive ring, firmly securing the explosive. The outer shell plate can wrap around the outer membrane, better limiting the outer diameter of the water medium in the interlayer between the outer and inner membranes, ensuring smooth lowering into the blast hole. Furthermore, the outer shell plate protects the outer membrane, reducing the risk of external punctures.

[0022] Furthermore, since the outer shell plate is pressed by the water medium to maintain the outer film layer and the outer shell plate together by friction, the setting of the second film bag can further ensure the fixed connection between the outer shell plate and the inner outer film layer.

[0023] Furthermore, the design of the hoop rib assembly facilitates the placement and positioning of fasteners.

[0024] Furthermore, the set scale lines ensure that the size of the ring width between the inner and outer membrane layers for placing the water medium can be adjusted more precisely when the two ends of the outer shell plate are closed.

[0025] Furthermore, the fasteners use foam double-sided adhesive, which is simple and convenient to use, and its closure avoids the closure of the outer shell plate, thus ensuring the stability and firmness of the closure of the outer shell plate.

[0026] Furthermore, the outer shell is made of PET material, which is fold-resistant and sturdy, and can be folded in a circular motion to adjust the ring width ratio between media.

[0027] Furthermore, the detonator of the explosive is covered with a wire to bind and seal the upper ends of the first and second film bags without the need for other components, making its structure simple and convenient.

[0028] Furthermore, the double-sided foam tape uses high-density EVA foam, a material that is common and readily available.

[0029] Furthermore, the starting 0-mark end is placed over the outside of the other end, making it easier for the operator to observe and adjust the position after the outer shell plate is closed. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A schematic diagram of the overall structure after blasting charge in the radial water coupling blasting charge method with adjustable medium ring width provided by the present invention;

[0032] Figure 2 This is a cross-sectional view of the internal structure of the explosive charge in this invention;

[0033] Figure 3 A schematic diagram of the first film bag formed by folding a cylindrical film in this invention;

[0034] Figure 4 This is a schematic diagram of the outer shell plate structure in this invention;

[0035] Figure 5 for Figure 3 A magnified view of a section at point A in the middle;

[0036] Figure 6 This is a schematic diagram of the structure of the second film bag.

[0037] In the picture:

[0038] 10-First film bag; 11-Cylindrical film; 12-Inner film; 13-Outer film;

[0039] 20- Explosives;

[0040] 30 - Water medium;

[0041] 40 - Outer shell plate; 41 - Hooping protrusion group; 42 - Hooping protrusion; 43 - Hooping groove; 44 - Scale line; 45 - Closed part of outer shell plate;

[0042] 50 - Second film bag. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] The purpose of this invention is to provide a radial water-coupled explosive charging method with adjustable medium ring width to solve the problems existing in the prior art, realize the adjustable medium ring width, so that the water medium can be better evenly distributed on the outer circumference of the explosive, improve its smooth release in the blast hole, and reduce the occurrence of film damage.

[0045] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] Example 1

[0047] This embodiment provides a radial water-coupled explosive charging method with adjustable medium ring width, mainly but not limited to applications in seismic exploration, including the following steps:

[0048] S1, fold the bottom of the cylindrical film 11 with openings at both ends inward to form a first film bag 10 with an inner film 12 and an outer film 13.

[0049] S2, place the explosive 20 required for blasting construction inside the inner membrane 12 of the first thin film bag 10, and add 1 / 4 to 3 / 4 of the required water medium 30 (preferably add about 2 / 3 of the water medium first) to the interlayer formed between the outer side of the inner membrane 12 and the inner side of the outer membrane 13.

[0050] S3, take a shell plate 40, bend both ends of the shell plate 40 and wrap it around the outside of the outer membrane 13. Adjust the size of the overlapping area at both ends of the shell plate 40 to adjust the inner diameter of the wrapping formed by the shell plate 40, so that the inner sidewall of the shell plate 40 is tightly attached to the outside of the outer membrane 13, and fix the wrapping shape of the shell plate 40 with multiple fasteners.

[0051] S4, the remaining portion of the required water medium 30 is added to the interlayer formed between the outer side of the inner membrane 12 and the inner side of the outer membrane 13, and then sealed.

[0052] Specifically, the cylindrical film 11 is a polyethylene film, the diameter of its inner film 12 is consistent with the diameter of the explosive 20, or the diameter of its inner film 12 is slightly larger than the diameter of the explosive 20, and the length of the cylindrical film 11 is more than twice the length of the explosive 20 with a certain margin.

[0053] Specifically, the outer shell plate 40 is made of PET material and is manufactured to the required size. Its longitudinal length is kept as consistent as possible with the length of the explosive 20. Laterally spaced hoop ribs 41 are arranged on the plate, each hoop rib group 41 including multiple hoop ribs 42. To counteract the accumulation of water medium 30 at the bottom of the interlayer formed by the outer membrane 13 and the inner membrane 12 due to the gravity of the water medium 30, the bottom hoop rib group 41 includes 3 to 4 hoop ribs 42. Using the hoop ring of each hoop rib 42 as a reference straight line, laser engraving technology is used to engrave and draw scale lines 44, such as... Figure 4 As shown, detailed diagram of the part is as follows. Figure 5 As shown.

[0054] The outer shell plate 40 allows for circumferential folding, which adjusts the circumferential width ratio between the media and counteracts the gravity accumulation of water at the bottom of the outer membrane 13, ensuring that the water medium 30 is evenly distributed radially around the explosive 20. Due to water's incompressibility, high density, and high viscosity, the expansion rate of detonation products in water is slow, resulting in a high intensity and long duration of the explosive shock wave generated in the coupled water. This improves energy utilization, allowing more energy to be applied to the elastic zone and generating stronger seismic waves. Utilizing the membrane's lightweight and flexible characteristics, it can not only hold the water medium 30 and the explosive 20 but also use water-side pressure to adhere the inner membrane 12 to the explosive 20 circumferentially, firmly securing the explosive 20. The outer shell plate 40 wraps around the outer membrane 13, better limiting the outer diameter of the water medium 30 in the interlayer between the outer and inner membranes 12, ensuring its smooth lowering within the blast hole. Furthermore, the outer shell plate 40 protects the outer membrane 13, reducing the risk of external punctures.

[0055] In this embodiment, a preferred option is S5, in which the entire assembly formed in S4 is placed in the second film bag 50, the outer diameter of the second film bag 50 being smaller than the inner diameter of the rupture hole. Since the outer shell plate 40 is held together by friction through the pressure of the water medium 30 on the outer film layer, the second film bag 50 further ensures the fixed connection between the outer shell plate 40 and the inner outer film layer.

[0056] Specifically, the second film bag 50 is made of polyethylene film, sealed at the bottom, and its cavity diameter is slightly smaller than the diameter of the blast hole during construction, in order to contain the entire radial water-coupled charge structure. The second film bag 50 is as follows: Figure 6 As shown.

[0057] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 and Figure 4As shown, the outer shell plate 40 is provided with multiple hoisting rib groups 41, each hoisting rib group 41 including at least two hoisting ribs 42; after the outer shell plate 40 is wrapped with the outer membrane 13, each hoisting rib 42 is perpendicular to the axis of the explosive 20 and each hoisting rib 42 protrudes outward toward the side away from the explosive 20; a hoisting groove 43 is formed between two adjacent hoisting ribs 42 in the same hoisting rib group 41, and a fastener is fixed in each hoisting groove 43 and / or between two adjacent hoisting rib groups 41. The hoisting rib group 41 facilitates the placement and positioning of the fastener.

[0058] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 , Figure 4 and Figure 5 As shown, each of the hooping ridges 41 has a scale line 44 along the extension direction of the hooping ridge 42. The scale line 44 ensures that the size of the annulus width between the inner and outer membrane layers for placing the water medium 30 is adjusted more accurately when the two ends of the outer shell plate 40 are closed.

[0059] In this embodiment, a preferred option is to use double-sided foam adhesive as the fastener, with the closed end of the double-sided foam adhesive avoiding the closed portion 45 of the outer shell plate. Using double-sided foam adhesive as the fastener provides a simple and convenient fixing method, and its closed end avoids the closed portion 45 of the outer shell plate, thus ensuring the stability and firmness of the closed portion of the outer shell plate 40.

[0060] In this embodiment, a preferred option is that the outer shell plate 40 is made of PET material. PET material provides fold resistance and strength, allowing for circumferential folding to adjust the width ratio between media.

[0061] In the optional embodiments of this example, a preferred method is that, along the axial direction of the explosive 20, the portions of the upper ends of the first film bag 10 and the second film bag 50 that extend beyond the explosive 20 are sealed and fixed by wrapping and knotting the detonator coating wire of the explosive 20. Using the detonator coating wire of the explosive 20 to bind and seal the upper ends of the first film bag 10 and the second film bag 50 requires no other components, resulting in a simple and convenient structure.

[0062] In this embodiment, a preferred option is to use high-density EVA foam as the double-sided adhesive. High-density EVA foam is a common and readily available material.

[0063] In the optional embodiments of this example, a preferred arrangement is that the starting 0 mark of each scale line 44 is located on the same side, and after the outer shell plate 40 is wrapped in the outer film 13, the end of the outer shell plate 40 with the starting 0 mark is located on the side of the outer shell plate 40 away from the explosive 20. By having one end with the starting 0 mark cover the outside of the other end, it is easier for the operator to observe and adjust the position of the outer shell plate 40 after it is enclosed.

[0064] Material selection instructions:

[0065] 1. The first film bag 10, which contains water medium 30 and explosive 20 inside the entire device, and the second film bag 50, which contains the explosive 20 outside the entire device, are made of polyethylene film (PE).

[0066] 2. The outer shell plate 40 enclosing the water medium 30 and the explosive 20 is made of polyethylene terephthalate (PET);

[0067] 3. The high-strength foam double-sided adhesive for fixing the outer shell plate 40 is made of ethylene-vinyl acetate copolymer (EVA) high-density foam.

[0068] In this embodiment, a preferred method of use is as follows:

[0069] S1, at the seismic exploration construction site, drilling machines or Luoyang shovels are used to drill blasting holes on the ground according to production needs;

[0070] S2, as Figure 3 As shown, the polyethylene water bag with transparent ends is folded inward from the bottom to form a double-layer bag structure with a closed bottom and a hollow middle cavity, which forms the first film bag 10.

[0071] S3, place the explosive 20 required for blasting into the inner membrane 12 of the first thin film bag 10 made in S2, and then add about 2 / 3 of the actual required water medium 30 into the interlayer formed between the inner membrane 12 and the outer membrane 13, and firmly fix the explosive 20 by the circumferential lateral pressure formed by the water.

[0072] S4, will be as Figure 4 The fabricated PET shell (i.e., shell plate 40) is looped around the outer membrane 13 outside the device containing the water medium 30 and explosive 20, fabricated in S3. When looping, care must be taken to ensure that one end of the hooping rib group 41, which includes multiple hooping ribs 42, is placed at the bottom to counteract the additional lateral pressure generated by the gravity of the water. After the looping is completed, according to the required ring width ratio between the media, the side with the 0 mark is placed on the outside, and the side with the end mark is placed on the inside. Starting from the 0 mark, the ring is circumferentially recessed to the required size. The ring width ratio between the media is achieved through the markings on the PET shell, i.e., the circumferential circumference. Figure 2 As shown;

[0073] S5, in the groove 43 formed on the outside of the PET shell or in the space between two adjacent ribs 41, use strong foam double-sided tape to wrap around and stick it around the perimeter to just offset the bulge of the PET shell caused by the ribs 42. The closed end of the foam double-sided tape should avoid the closed end of the PET shell so that the closed end of the PET shell and the closed end of the foam double-sided tape are 180° mirror symmetrical. Continue to add the remaining water medium 30 in the interlayer formed between the inner film 12 and the outer film 13.

[0074] S6, place the entire structure described above in Figure 6 In the second film bag 50 shown, the second film bag 50 is a polyethylene film bag with a closed bottom and a hollow middle cavity. Then, a certain pressure is applied slightly inward to the outside of the second film bag 50 by hand so that the inside of the second film bag 50 can be bonded to the foam double-sided tape on the outside of the PET shell, so as to play an additional fixing and bonding role.

[0075] S7, using the detonator-covered wire of explosive 20, the upper empty part of the first film bag 10, which contains water medium 30 and explosive 20 on the inside, and the second film bag 50, which contains the entire device structure on the outside, are wrapped and knotted to fix and seal the entire device.

[0076] S8. The entire device is placed in the blast hole and lowered to the bottom of the hole. The original soil on site is backfilled, and the electronic detonator is remotely detonated to trigger the explosive 20. The blast stress wave continues to propagate after passing through the water medium 30 in the device, completing the water-coupled blast and finally completing the entire artificial earthquake process.

[0077] Basic principle explanation:

[0078] 1. Due to the incompressibility, high density, and high viscosity of water, the expansion rate of detonation products in water is slow. The explosive shock wave generated in coupled water has a high intensity and long duration, thus improving energy utilization and applying more energy to the elastic zone to form stronger seismic waves.

[0079] 2. Utilizing the lightweight and highly flexible characteristics of the inner polyethylene double-layer water bag material, it can not only hold water medium 30 and explosive 20, but also use the lateral pressure of water medium 30 to adhere the inner membrane 12 to the circumference of explosive 20, firmly fixing explosive 20.

[0080] 3. Utilizing the folding resistance and sturdiness of the outer PET shell, a circumferential folding operation can be performed, thereby adjusting the ring width ratio between the media and counteracting the phenomenon of water accumulation due to gravity in the lower part of the interlayer between the inner film 12 and the outer film 13 used to hold the water medium 30, so that the water medium 30 is evenly distributed radially around the explosive 20.

[0081] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A radial water-coupled explosive charging method with adjustable medium ring width, characterized in that: Includes the following steps: S1, fold the bottom of the cylindrical film with openings at both ends inward to form a first film bag with an inner film and an outer film; S2, place the explosives required for blasting operations inside the inner membrane of the first thin film bag, and add 1 / 4 to 3 / 4 of the required water medium to the interlayer formed between the outer side of the inner membrane and the inner side of the outer membrane; S3, take a flat outer shell, bend both ends of the flat outer shell and wrap it around the outside of the outer membrane. Adjust the size of the overlapping area at both ends of the flat outer shell to adjust the inner diameter of the wrap formed by the flat outer shell, so that the inner wall of the flat outer shell is tightly attached to the outside of the outer membrane, and fix the wrapping shape of the flat outer shell with multiple fasteners. The outer shell plate is provided with a plurality of hooping rib groups, each hooping rib group including at least two hooping ribs; after the outer shell plate is wrapped around the outer membrane, each hooping rib is perpendicular to the axis of the explosive and each hooping rib protrudes outward toward the side away from the explosive; a hooping groove is formed between two adjacent hooping ribs in the same hooping rib group, and a fastener is fixed in each hooping groove and / or between two adjacent hooping rib groups; Each of the aforementioned hoop-raising ridges has a scale line along the extension direction of the hoop-raising ridge; S4, continue to add the remaining portion of the required water medium into the interlayer formed between the outer side of the inner membrane and the inner side of the outer membrane, and seal it; It also includes S5, which places the whole formed in S4 into a second film bag, the outer diameter of the second film bag being smaller than the inner diameter of the rupture hole.

2. The radial water-coupled explosive charging method with adjustable medium ring width according to claim 1, characterized in that: The fastener is double-sided foam tape, and the closed end of the double-sided foam tape avoids the closed part of the outer shell plate.

3. The radial water-coupled explosive charging method with adjustable medium ring width according to claim 1, characterized in that: The outer shell is made of PET material.

4. The radial water-coupled explosive charging method with adjustable medium ring width according to claim 1, characterized in that: Along the axial direction of the explosive, the upper portions of the first and second film bags, which are longer than the explosive, are sealed and fixed by wrapping and knotting the detonator coating wire of the explosive.

5. The radial water-coupled explosive charging method with adjustable medium ring width according to claim 2, characterized in that: The double-sided adhesive for the foam is high-density EVA foam.

6. The radial water-coupled explosive charging method with adjustable medium ring width according to claim 1, characterized in that: The starting 0 mark of each of the scale lines is located on the same side, and after the outer shell plate is wrapped in the outer film, the end of the outer shell plate with the starting 0 mark is located on the side of the outer shell plate opposite to the explosive.

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