Rock breaking gas generator site construction auxiliary device and construction method

Abstract

The application relates to the technical field of blasting site construction, and discloses a rock breaking gas generator site construction auxiliary device and a construction method. The rock breaking gas generator site construction auxiliary device comprises: a failure agent storage tank; a liquid discharge pipe which is arranged in a spiral mode around the lateral space of the rock breaking gas generator, a plurality of liquid discharge openings are arranged on the liquid discharge pipe in the axial direction; a delivery pump which is connected with one end of the liquid discharge pipe and extends into a blast hole, the other end of the liquid discharge pipe is a liquid discharge opening and extends into the bottom of the blast hole; a connecting seat which is installed on the liquid discharge pipe at intervals; and a plurality of shaping pipes which are distributed in a spiral mode at intervals along the liquid discharge pipe, a plurality of shaping pipes are distributed along the axial direction of the blast hole, and the two ends of one shaping pipe in one row of shaping pipes are connected with two connecting seats in the same vertical direction. The application can accurately find a dud and speed up the processing speed of the dud.

Description

Technical Field

[0001] This application relates to the technical field of blasting site construction, and in particular to auxiliary devices and construction methods for on-site construction of rock-breaking gas generators. Background Technology

[0002] The fracturing mechanism of a rock-breaking gas generator is to "expand" the rock with high-pressure gas. The gas pressure generated is directly related to the rock's strength; the harder the rock, the higher the gas pressure generated; conversely, the softer the rock, the lower the gas pressure generated. Once the rock loosens and a large crack appears, the pressure is released, and the gas-generating agent in the rock-breaking gas generator automatically terminates the chemical reaction without any shock wave effect. Although traditional explosives also generate high-pressure gas, there is a geometric difference in the peak pressure between the two. Furthermore, traditional explosives "fracture" the rock more under the action of shock waves. The fracturing mechanisms of the two are significantly different, and therefore, the construction methods also differ.

[0003] The construction method for the rock-breaking gas generator is as follows: Drill 2-3 rows of blast holes using a down-the-hole drill (2 rows for hard rock), with a hole depth generally of 4 meters; fill with material, the filling length L is generally 1.5-2l (l is the product length); when installing the rock-breaking gas generator in the blast hole, obtain the powder collected from the borehole on-site, and gently tamp it down with a bamboo or wooden pole while filling; or use soil with a certain degree of moisture for filling. The ignition is operated by a fracturing operator with fracturing experience. After ignition, the following measures can be taken to dispose of unignited products: fill the rock hole with water, ensuring it is completely filled until water overflows the opening, and maintain this for 24 hours. Fracturing personnel enter the site to check for unignited products, landslides, or other safety hazards, and issue a evacuation warning order after confirming safety.

[0004] If the generators in other boreholes detonate, the filling section at the borehole opening of the dud is prone to collapse. Although it is compacted with wooden poles while filling, it is still a granular accumulation. When the surrounding rock-breaking gas generators detonate, the particles will quickly rearrange and loosen under the action of the shock wave. However, the rock mass around the dud at the bottom of the borehole generally will not completely collapse, and water injection is still feasible. It is necessary to inject water through the filling section. If the filling section of the borehole collapses, it is not easy to find the correct borehole for accurate water injection. Summary of the Invention

[0005] In order to enable accurate water injection, this application provides on-site construction auxiliary devices and construction methods for rock-breaking gas generators.

[0006] Firstly, this application provides an on-site construction auxiliary device for a rock-breaking gas generator, employing the following technical solution: A field construction auxiliary device for a rock-breaking gas generator, installed inside the borehole, includes: The inactivated agent storage tank is equipped with graduation markings and a drain outlet. The drain pipe is arranged in a spiral around the periphery of the rock-breaking gas generator. The diameter of the spiral profile is larger than the outer diameter of the rock-breaking gas generator, so that a radial gap is maintained between the drain pipe and the generator. The diameter of the spiral can be adapted to the inner diameter of the borehole. The drain pipe has multiple drain ports along the axial direction. A delivery pump is connected to one end of the drain pipe that extends out of the borehole, and the other end of the drain pipe is a drain outlet that extends into the bottom of the borehole; Connecting seats are installed at intervals on the drain pipe; The plastic tubes are arranged in multiple rows along the spiral circumference of the drain pipe. Each row of plastic tubes is arranged in multiple columns along the axial direction of the borehole. The two ends of one of the plastic tubes in the row are respectively connected to two connecting seats in the same vertical direction.

[0007] By adopting the above technical solution, the location of duds can be accurately located through pre-embedded drainage pipes, allowing for the injection of water or chemical deactivating agents. By adjusting the spiral diameter, the same auxiliary device can be applied to boreholes of different diameters. The spiral structure of the drainage pipe is supported by a connecting seat, forming an independent, fixed-shape "spiral skeleton." Compared to a straight pipe that can only inject liquid from one point at the bottom, the spirally distributed drainage pipes allow the liquid to more quickly "envelop" the generator. Liquid seeps from multiple points in the spiral tube, or surges from the bottom and rises along the spiral gaps, allowing for faster and more uniform immersion of the entire generator, shortening the time required for complete immersion. This is particularly suitable for use with rapid deactivating agents. When adjacent boreholes detonate and generate shock waves, the spiral drainage pipe can undergo slight elastic deformation like a spring, absorbing some of the impact energy and preventing hard fracture. Simultaneously, the axially shaped tubing ensures that the overall skeleton will not permanently bend or collapse. This structure allows the pre-embedded injection channels to maintain their functional integrity even under harsh impact environments.

[0008] Optionally, the connector has an insertion hole, and the plastic tube is inserted into the connector.

[0009] By adopting the above technical solution, the plug-in connection method enables the detachable connection between the plastic tube and the connector.

[0010] Optionally, the shaped tube is a telescopic rod.

[0011] By adopting the above technical solution, different borehole depths (4m to 7m) require matching numbers of spiral turns and axial spans in the drainage pipe. The telescopic plastic tube can be stretched or contracted according to the actual borehole depth, eliminating the need for separate material preparation for each depth, further improving the adaptability of the device and the convenience of on-site operation. Simultaneously, the telescopic rod can be retracted to its shortest length during transportation, facilitating carrying and storage.

[0012] Optionally, it also includes a shaping frame and a shaping rod, one end of the shaping tube extends out of the blast hole, one end of the shaping rod is connected to the shaping tube, and the other end of the shaping rod is connected to the shaping frame, the shaping frame being located outside the blast hole.

[0013] By adopting the above technical solution, the part of the plastic tube extending out of the orifice is connected to the shaping frame outside the orifice through the shaping rod, forming an external constraint system. This system can resist the downward impact force of the tamping operation during the filling process, prevent the plastic tube from being "smashed" into the orifice and causing its upper part to be submerged in the filling section, and ensure that the injection channel can always be identified and accessed.

[0014] Optionally, the shaping tube connected to the shaping rod is a hollow structure with an open end, and the rod wall of the shaping tube has an overflow hole. By adopting the above technical solution, the overflow hole also allows the failure agent to seep out radially from the plastic tube, achieving wetting of the inside of the filling section and further enhancing the soaking effect on the dud.

[0015] Optionally, the shaping rod is a hollow structure with an open end, and one end of the shaping rod is connected to the shaping tube.

[0016] By adopting the above technical solution, when the failed agent in the borehole is back-discharged, it can overflow through the shaping rod, and it can also provide feedback that a large amount of failed agent has been filled in the borehole.

[0017] Optionally, a support plate is installed between two adjacent plastic tubes extending from the borehole along the circumferential direction of the borehole, and the support plate and the plastic tubes enclose a blocking space.

[0018] By adopting the above technical solution, the rigid frame composed of the support plate and the plastic tube further enhances the structural strength of the orifice section and resists the damage of the orifice filling material by the shock wave.

[0019] Optionally, the blockage space is provided with spaced-apart filling plates, which are in contact with the support plate and the shaped tube.

[0020] By adopting the above technical solution, the filling plate divides the blocked space into multiple independent small compartments, ensuring uniform and dense filling. At the same time, the multi-point contact between the filling plate, the plastic tube, and the support plate forms a "honeycomb" structure, which disperses and absorbs energy under the action of shock waves, further delaying the collapse of the filling section.

[0021] Secondly, this application provides a method for on-site construction of a rock-breaking gas generator, employing the following technical solution: The on-site construction method for rock-breaking gas generators, using the aforementioned on-site construction auxiliary devices for rock-breaking gas generators, includes the following steps: Based on the inner diameter and depth of the borehole, the drain pipe is adjusted and maintained in a predetermined spiral diameter and axial span shape through the connecting seat and the plastic tube; The adjusted drain pipe is spirally wound around the periphery of the rock-breaking gas generator, so that the drain outlet of the drain pipe is located below or to the side of the bottom of the rock-breaking gas generator. The rock-breaking gas generator, which is surrounded by the drainage pipe, is placed into the borehole, and the inlet end of the drainage pipe extends out of the borehole opening. Fill the borehole with packing material so that the packing material covers the drain pipe and the plastic tube, and keep the upper end of the plastic tube extending out of the borehole opening; When a dud needs to be removed, the delivery pump is connected to the end of the drain pipe that extends out of the borehole. The delivery pump pumps the deactivating agent or water into the drain pipe, so that the deactivating agent or water flows out from the drain port of the plastic tube and submerges the rock-breaking gas generator. Maintain the soaking time as scheduled to complete the treatment of duds.

[0022] By adopting the above technical solution, after the construction team drills and cleans the hole as usual, they spirally wind the drain pipe around the generator. A connecting seat and a plastic tube are installed using a plug-in method to form a framework. The rock-breaking gas generator and the drain pipe are then placed into the hole together, with the inlet end of the drain pipe and the upper end of the plastic tube extending out of the hole. Filling material (soil or stone powder) is then added and compacted, ensuring the upper end of the plastic tube remains exposed. After normal detonation, if a misfire occurs, the operator does not need to dig or probe; they can directly locate the pre-buried inlet end of the drain pipe, connect the delivery pump and the storage tank, and pump the inactivating agent or water until liquid overflows from the borehole. The area is kept soaked for 2–4 hours (inactivating agent) or 24 hours (water). After confirming inactivation, the device is dismantled and the borehole is cleaned.

[0023] In summary, this application includes at least one of the following beneficial effects: 1. Ensure the unobstructed and locatable injection channels during misfire removal, significantly improving the reliability and success rate of misfire removal; 2. Improve the wetting efficiency and uniformity of the deactivated agent or water, shorten the treatment time for duds, and enhance impact resistance. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the installation of the drain pipe and the rock-breaking gas generator according to an embodiment of this application; Figure 2 This is a schematic diagram of the drain pipe and rock-breaking gas generator installed in the borehole according to an embodiment of this application; Figure 3 This is a schematic diagram of the overall structure of the drain pipe after it has been shaped by the shaping pipe according to an embodiment of this application; Figure 4This is a schematic diagram of the overall structure of the connection between the shaping tube and the shaping rod according to an embodiment of this application; Figure 5 This is a schematic diagram illustrating the structure of the shaping rod and shaping frame located outside the blast hole according to an embodiment of this application; Figure 6 This is a structural cross-sectional view illustrating the installation of the filler plate in an embodiment of this application.

[0025] Explanation of reference numerals in the attached drawings: 10, rock-breaking gas generator; 20, drain pipe; 30, connecting seat; 40, shaping tube; 41, outer rod; 42, inner rod; 43, overflow port; 50, shaping frame; 51, shaping rod; 60, support plate; 70, filling plate; 80, filling section. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1 - Appendix Figure 6 This application will be described in further detail.

[0027] In the first aspect, the embodiments of this application disclose an on-site construction auxiliary device for a rock-breaking gas generator, which is installed inside a pre-drilled blast hole to solve the problem of handling misfires caused by the collapse of the filling section.

[0028] The on-site construction auxiliary device for the rock-breaking gas generator includes an inert agent storage tank and a drain pipe 20. The drain pipe 20 is connected to the inert agent storage tank via a delivery pump. The inert agent storage tank is placed on the ground outside the borehole, in a safe area away from the borehole, and is therefore not shown in the figure. The inert agent storage tank has clear graduation markings to allow construction personnel to accurately control the volume of inert agent or water injected.

[0029] Reference Figure 1 The drain pipe 20 is spirally distributed and wrapped around the periphery of the rock-breaking gas generator 10, with the diameter of the spiral profile set to be larger than the outer diameter of the rock-breaking gas generator 10. This maintains a radial gap between the drain pipe 20 and the generator, facilitating uniform liquid wetting. One end of the drain pipe 20 is a liquid inlet, extending out of the borehole and connecting to the outlet of the delivery pump; the other end is an open drain port, which extends to the bottom of the borehole in the installed state. Multiple drain ports along the axial direction increase the draining speed.

[0030] Reference Figure 2 The drain pipe 20 is wound around to the end of the rock-breaking gas generator 10 and then stops spiraling. The part of the drain pipe 20 located in the filling section 80 inside the borehole is a straight section that extends directly out of the borehole.

[0031] Reference Figure 3To maintain the spiral drainage pipe 20 in a stable, predetermined spiral shape, multiple connecting seats 30 are spaced and fitted onto the drainage pipe 20 along its spiral path. Each connecting seat 30 has insertion holes on both its upper and lower ends, and a plastic tube 40 is inserted into each of the upper and lower ends of the connecting seat 30. The plastic tubes 40 are distributed in multiple rows along the spiral circumference of the drainage pipe 20. Each row of plastic tubes 40 has multiple tubes distributed along the axial direction of the borehole, and the two ends of each plastic tube 40 in each row are respectively inserted into the insertion holes of two connecting seats 30 in the same vertical direction. Thus, through the insertion and cooperation of the connecting seats 30 and the plastic tubes 40, the axial spacing between the spiral coils of the drainage pipe 20 is fixed, forming a rigid three-dimensional skeleton structure.

[0032] Reference Figure 3 As a further preferred embodiment, the plastic tube 40 between the two connecting seats 30 is configured as a telescopic rod structure, including two outer rods 41 and an inner rod 42. The two ends of the inner rod 42 are respectively inserted into an outer rod 41, and the outer rod 41 is inserted into the connecting seat 30. It can be stretched or contracted according to the actual depth of different boreholes to adapt to borehole depths ranging from 4 meters to 7 meters, and it is also convenient for transportation and storage.

[0033] Reference Figure 4 and Figure 5 Considering that during the filling of the borehole with materials such as soil or stone powder, tamping operations using tools such as wooden poles are required, this operation could easily cause the upper end of the shaped tube 40 to be driven into the filling section 80. This device further includes a shaping frame 50 and a shaping rod 51. The uppermost shaped tube 40 is a straight tubular structure, extending upwards to the outside of the borehole. One end of the shaping rod 51 is fixedly inserted into the portion of the shaped tube 40 extending from the borehole, while the other end is inserted into the shaping frame 50 located outside the borehole. The shaping frame 50 and the shaping rod 51 together form an external constraint system.

[0034] It can withstand the downward impact force during tamping and ensures that the upper end of the plastic tube 40 remains visible above the borehole. To further improve the wetting effect of the dud treatment, the plastic tube 40 connected to the shaping rod 51 is designed as a hollow structure with an open end, and multiple overflow ports 43 are opened on the rod wall of the plastic tube 40. At the same time, the shaping rod 51 is also designed as a hollow structure with an open end, one end of which is connected to the hollow interior of the plastic tube 40. When the liquid level in the borehole is too high and backflow occurs, the excess deactivating agent can overflow from the borehole through the hollow plastic tube 40 and the shaping rod 51, giving the operator a clear feedback signal. Reference Figure 5 and Figure 6To address the technical problem of the borehole orifice packing section 80 easily collapsing and loosening under the impact of the blast wave from adjacent boreholes, a support plate 60 is installed between each of the plastic tubes 40 extending from the borehole orifice, and between two adjacent plastic tubes 40 along the circumferential direction of the borehole. The support plate 60 is made of plastic or foam and is customized according to the borehole diameter. The support plate 60 and the plastic tubes 40 together form a blocking space, which is used to accommodate and constrain the packing material of the orifice section, forming a composite impact-resistant structure of a rigid frame and granular filler.

[0035] Within the blocked space, multiple packing plates 70 are further spaced out, with adjacent packing plates 70 arranged parallel to each other. Each packing plate 70 has clearance holes for the extension wires of the drain pipe 20 and the rock-breaking gas generator 10. The edges of these packing plates 70 contact and engage with the support plate 60 and the shaped tube 40, thereby dividing the large blocked space into multiple independent small compartments, resembling a honeycomb structure. This multi-point contact and compartmentalized design can disperse and absorb energy under the action of shock waves, significantly delaying the overall damage and collapse of the plugging section 80.

[0036] Based on the above-mentioned auxiliary devices, this application discloses an on-site construction method for a rock-breaking gas generator.

[0037] The on-site construction method of the rock-breaking gas generator is carried out according to the following steps: According to the inner diameter and depth of the blast hole, the drain pipe 20 is adjusted and maintained in the predetermined spiral diameter and axial span shape through the connecting seat 30 and the plastic tube 40. The adjusted drain pipe 20 is spirally wound around the periphery of the rock-breaking gas generator 10, so that the drain outlet of the drain pipe 20 is located below or to the side of the bottom of the rock-breaking gas generator 10. The rock-breaking gas generator 10, which is surrounded by the drain pipe 20, is placed into the borehole, and the inlet end of the drain pipe 20 extends out of the borehole opening. Fill the borehole with packing material so that the packing material covers the drain pipe 20 and the plastic tube 40, and keep the upper end of the plastic tube 40 in the state of extending out of the borehole opening; When a dud needs to be removed, the delivery pump is connected to one end of the drain pipe 20 that extends out of the borehole. The delivery pump pumps the deactivating agent or water into the drain pipe 20, so that the deactivating agent or water flows out from the drain outlet of the drain pipe 20 and submerges the rock-breaking gas generator 10. Maintain the soaking time as scheduled to complete the treatment of duds.

[0038] Specifically, the operator takes out a drain pipe 20 of predetermined length and bends it into a spiral shape according to the borehole diameter (120mm), so that the outer diameter of the spiral is about 100mm (greater than the generator outer diameter of 80mm, but less than the borehole diameter). At the same time, the number of spiral turns (about 3 turns) and the axial span of 3m are determined according to the borehole depth of 5.5m (the generator length is 2m plus the allowance reserved at the bottom and led out at the top).

[0039] Next, multiple connecting seats 30 are installed at intervals along the spiral path on the drain pipe 20. A plastic tube 40 is inserted between two connecting seats 30 in the same vertical direction, and the plastic tube 40 is stretched to a length that matches the axial span of the spiral. By connecting the connecting seats 30 and the plastic tube 40, the spiral shape of the drain pipe 20 is locked, preventing it from loosening or deforming. After adjustment, the shaped spiral drain pipe 20 is tightly wound around the periphery of the rock-breaking gas generator 10 in a spiral shape, ensuring that the drain port at the bottom of the drain pipe 20 extends about 10 cm beyond the bottom of the generator so that the liquid can directly immerse the bottom of the generator.

[0040] Two workers work together to lift the rock-breaking gas generator 10, which is equipped with a drain pipe 20, and slowly lower it into the borehole. Simultaneously, the inlet end (upper end) of the drain pipe 20 is led out from the borehole opening to the ground outside. During lowering, the upper end of the plastic tube 40 is kept protruding from the borehole opening for a certain length. Then, pre-prepared soil with a certain level of moisture is layered into the borehole as filling material. Each layer is gently tamped down with a wooden pole, and the filling length is controlled between 2m and 2.5m. During filling, care is taken to keep the upper end of the plastic tube 40 protruding from the borehole opening at all times, and to prevent the plastic tube 40 from being driven into the borehole during tamping. A shaping rod 51 and a shaping frame 50 are also installed at the orifice: one end of the shaping rod 51 is connected to the plastic tube 40 extending out of the orifice, and the other end is connected to a square shaping frame 50 placed on the ground at the orifice, thereby forming an external constraint.

[0041] After normal detonation, if the rock-breaking gas generator 10 in the borehole is found to have failed to ignite (i.e., a dud), the operator does not need to dig or probe. Instead, they directly locate the inlet end of the drain pipe 20 pre-installed at the borehole opening on the ground and connect it to the outlet of the delivery pump. The inlet of the delivery pump is connected to the drain outlet of the inactivated agent storage tank via a hose. The delivery pump is started to pump the chemical inactivated agent into the drain pipe 20, with the pumping pressure controlled at 0.2-0.4 MPa. Liquid flows out from the drain port at the bottom of the drain pipe 20. Observe the borehole opening and the hollow opening of the shaping rod 51. When inactivated agent overflows, it indicates that the borehole is full.

[0042] After soaking for 3 hours, confirm that the rock-breaking gas generator 10 is completely ineffective, remove the delivery pipeline and shaping frame 50, clean the borehole, and complete the treatment of the dud. The entire construction process does not require re-drilling or excavation, the injection channel remains unobstructed at all times, and the treatment time is significantly shortened compared to the traditional 24-hour water injection.

[0043] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rock-breaking gas generator (10) is an on-site construction auxiliary device installed inside a blast hole, characterized in that, include: The inactivated agent storage tank is equipped with graduation markings and a drain outlet. The drain pipe (20) is installed inside the borehole and is spirally distributed around the rock-breaking gas generator (10). The delivery pump is connected to one end of the drain pipe (20) that extends out of the borehole, and the other end of the drain pipe (20) is the drain port that extends into the bottom of the borehole; Connecting seat (30) is installed at intervals on drain pipe (20); The plastic tube (40) is distributed in multiple rows along the spiral circumferential direction of the drain pipe (20). Multiple plastic tubes (40) in one row are distributed along the axial direction of the borehole. The two ends of one plastic tube (40) in one row are respectively connected to two connecting seats (30) in the same vertical direction.

2. The on-site construction auxiliary device for the rock-breaking gas generator (10) according to claim 1, characterized in that, The connector (30) has an insertion hole, and the plastic tube (40) is inserted into the connector (30).

3. The on-site construction auxiliary device for the rock-breaking gas generator (10) according to claim 2, characterized in that, The shaped tube (40) is a telescopic rod.

4. The on-site construction auxiliary device for the rock-breaking gas generator (10) according to claim 1, characterized in that, It also includes a shaping frame (50) and a shaping rod (51), one end of the shaping tube (40) extends out of the blast hole, one end of the shaping rod (51) is connected to the shaping tube (40), and the other end of the shaping rod (51) is connected to the shaping frame (50), and the shaping frame (50) is located outside the blast hole.

5. The on-site construction auxiliary device for the rock-breaking gas generator (10) according to claim 4, characterized in that, The shaping tube (40) connected to the shaping rod (51) is a hollow structure with an open end, and the rod wall of the shaping tube (40) is provided with an overflow hole.

6. The on-site construction auxiliary device for the rock-breaking gas generator (10) according to claim 5, characterized in that, The shaping rod (51) is a hollow structure with an open end, and one end of the shaping rod (51) is connected to the shaping tube (40).

7. The on-site construction auxiliary device for the rock-breaking gas generator (10) according to claim 4, characterized in that, Between the plastic tubes (40) extending out of the borehole, a support plate (60) is installed between two adjacent plastic tubes (40) along the circumferential direction of the borehole, and the support plate (60) and the plastic tubes (40) form a blocking space.

8. The on-site construction auxiliary device for the rock-breaking gas generator (10) according to claim 7, characterized in that, The blockage space is provided with spaced filling plates (70), which are in contact with the support plate (60) and the shaped tube (40).

9. A method for on-site construction of a rock-breaking gas generator (10), wherein the on-site construction auxiliary device for the rock-breaking gas generator (10) according to any one of claims 1-8 is used for rock-breaking and fracturing operations, characterized in that, Includes the following steps: According to the inner diameter and depth of the borehole, the drain pipe (20) is adjusted and maintained in a predetermined spiral diameter and axial span shape by means of the connecting seat (30) and the shaping tube (40); The adjusted drain pipe (20) is spirally wound around the periphery of the rock-breaking gas generator (10), so that the drain outlet of the drain pipe (20) is located below or to the side of the bottom of the rock-breaking gas generator (10). The rock-breaking gas generator (10) with the drain pipe (20) around it is placed into the borehole, and the inlet end of the drain pipe (20) extends out of the borehole opening. Fill the borehole with packing material so that the packing material covers the drain pipe (20) and the plastic tube (40), and keep the upper end of the plastic tube (40) extending out of the borehole opening; When a dud needs to be removed, the delivery pump is connected to one end of the drain pipe (20) that extends out of the borehole. The delivery pump pumps the deactivating agent or water into the drain pipe (20), so that the deactivating agent or water flows out from the drain port of the plastic tube (40) and immerses the rock-breaking gas generator (10). Maintain the soaking time as scheduled to complete the treatment of duds.

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