Sandstone uranium mine shaft bottom blasting permeation-increasing plugging device

Abstract

The invention provides a sandstone uranium mine shaft bottom blasting and permeation increasing plugging device which comprises a cylindrical supporting shell, an upper sliding body, a lower sliding body, two expansion assemblies and a sealing assembly. The upper sliding main body is arranged in the supporting shell in a sliding mode, and an exhaust channel capable of being plugged is formed in the upper sliding main body. The upper sliding main body is arranged in the supporting shell in a sliding mode, the lower sliding main body is arranged in the supporting shell in a sliding mode, an air storage space is formed between the upper sliding main body and the lower sliding main body, the lower sliding main body is provided with an air inlet channel, and the air inlet channel and the exhaust channel communicate with the air storage space; the two expansion assemblies are provided with a plurality of abutting parts, and the abutting parts move outwards to abut against the rock wall; the sealing assembly is arranged at the bottom end of the lower sliding body. According to the sandstone uranium mine shaft bottom blasting permeation-increasing plugging device, a sealing device for plugging a mine by means of blasting gas is provided, the device can be repeatedly used, the utilization rate is increased, and the plugging cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of mine blasting, and in particular relates to a sandstone uranium mine bottom blasting permeability enhancement and plugging device. Background Art

[0002] Natural uranium is an important nuclear power fuel, a strategic mineral resource and an energy resource. Sandstone uranium is mined by in-situ leaching, which involves blasting cracks in the strata, increasing the permeability of the strata through the cracks, and then increasing the area that can be affected by the seepage of the injection wells, thereby improving the effect of in-situ leaching. During the blasting process, the mine needs to be sealed to allow more energy generated by the explosion to act on the blastholes and reduce energy loss.

[0003] However, the current sealing methods have obvious disadvantages and cannot meet the existing mining requirements. For example, gun mud sealing, which forms a closed space by filling gun mud into the blasting hole, cannot be reused and has high technical requirements. It also has high requirements on technology and environment, resulting in excessively high cost of sealing during blasting. Another method is foam sealing, which directly injects curing agent into the well wall for sealing. However, this method may cause pollution to the environment and lose the sealing effect due to temperature and pressure changes and chemical erosion in the environment. It will also waste the energy generated by the blasting, and the sealing method is complicated. Summary of the invention

[0004] The embodiment of the present invention provides a sandstone uranium mine bottom blasting permeability enhancement plugging device, aiming to solve the technical problems in the prior art that the plugging method is complicated and cannot be reused, resulting in excessively high plugging costs.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a sandstone uranium mine bottom blasting permeability enhancement and plugging device, comprising: A supporting shell, wherein the supporting shell is cylindrical and arranged vertically; An upper sliding body is slidably disposed in the supporting shell, and the top of the upper sliding body protrudes from the top of the supporting shell, and the upper sliding body is provided with an exhaust passage that passes through from top to bottom; A lower sliding body is slidably disposed in the supporting shell, and the bottom of the lower sliding body protrudes from the bottom of the supporting shell, an air storage space is formed between the upper sliding body and the lower sliding body, and the lower sliding body is provided with an air intake channel that passes through from top to bottom, and the air intake channel and the exhaust channel are respectively communicated with the air storage space; Two expansion components are respectively arranged at two ends of the support shell, and the expansion components have a plurality of abutment parts that slide along their own radial direction. The upper sliding body and the lower sliding body are respectively slidably matched with the corresponding abutment parts, and can respectively push the corresponding abutment parts to slide outward until they abut against the rock wall; and A sealing assembly is arranged at the bottom end of the lower sliding body, and the sealing assembly includes a fixed seat, an elastic member and a sealing ring. The fixed seat is slidably sleeved on the outer periphery of the lower sliding body, the sealing ring is arranged on the top of the fixed seat, and the outer diameter of the sealing ring is equal to the outer diameter of the fixed seat. The two ends of the elastic member are respectively connected to the supporting shell and the sealing ring. The elastic member can cooperate with the fixed seat to squeeze the sealing ring, so that the outer diameter of the sealing ring expands outward to seal the well wall.

[0006] In a possible implementation, limiting rings are respectively provided at both ends of the support shell, the limiting ring located at the upper end is used to limit the upward sliding stroke of the upper sliding body, and the limiting ring located at the lower end is used to limit the downward sliding stroke of the lower sliding body.

[0007] In a possible implementation, the upper sliding body includes a sliding seat and a sliding column integrally formed from bottom to top, the sliding seat is slidably fitted with the inner wall of the supporting shell, the sliding column is coaxially arranged with the sliding seat, and the exhaust channel is opened on the sliding column and the sliding seat; The lower sliding body includes a sliding ring and a sliding cylinder integrally formed from top to bottom, the outer periphery of the sliding ring slidingly fits with the inner wall of the supporting shell, the inner ring of the sliding ring is connected with the inner cavity of the sliding cylinder to form the air inlet channel, and the air storage space is formed between the upper end surface of the sliding ring and the lower end surface of the sliding seat.

[0008] In a possible implementation, the sliding seat, the sliding column, the limiting ring located above, and the supporting shell form a first annular air control space, and the sliding ring, the sliding cylinder, the limiting ring located below, and the supporting shell form a second annular air control space. The supporting shell is provided with an air passage, and the two ends of the air passage are respectively connected with the first air control space and the second air control space; the sliding column is provided with an inflation channel, the bottom end opening of the inflation channel is arranged on the bottom periphery of the sliding column and is connected with the first air control space, and the top end opening of the inflation channel is arranged on the upper end surface of the sliding column.

[0009] In a possible implementation, the expansion assembly includes a connecting seat and a plurality of abutment blocks, the connecting seat is fixedly connected to the end of the supporting shell, a plurality of radial openings are opened on the outer circumference of the connecting seat, the abutment blocks are slidably arranged in the corresponding radial openings, and the abutment blocks form the abutment portion; The outer end face of the abutment block abuts against the well wall, the inner end face of the abutment block located above abuts against the outer periphery of the sliding column, and the outer diameter of the sliding column gradually increases from top to bottom; the inner end face of the abutment block located below abuts against the outer periphery of the sliding cylinder, and the outer diameter of the sliding cylinder gradually decreases from top to bottom.

[0010] In a possible implementation, a retaining ring is further provided on the outer periphery of the lower sliding body, and the retaining ring is located below the fixing seat to limit the downward movement of the fixing seat.

[0011] In a possible implementation, the sealing assembly also includes a bushing, which includes an annular lining plate and a limit retaining ring arranged below the lining plate, the outer diameter of the lining plate is larger than the outer diameter of the limit retaining ring, the bottom of the lining plate abuts against the sealing ring, the top of the lining plate is connected to the elastic member, and the outer periphery of the limit retaining ring extends into and fits the inner ring of the sealing ring to limit the inward expansion of the sealing ring.

[0012] In a possible implementation, a pressure sensor and a high temperature and high pressure filter are provided at the bottom end of the air intake passage, the pressure sensor is used to detect the pressure generated by the explosion, and the high temperature and high pressure filter is provided below the pressure sensor.

[0013] In a possible implementation, a one-way valve is provided at the top opening of the exhaust passage, and the one-way valve is communicatively connected to the pressure sensor.

[0014] In a possible implementation, a vertically arranged lead wire channel is opened on the upper sliding body, the lead wire channel is connected to the air storage space and the air intake channel, and a lead wire is passed through the lead wire channel.

[0015] The sandstone uranium mine bottom blasting permeability plugging device provided by the present invention provides a sealing device for plugging the mine with the help of explosive gas, compared with the prior art, wherein the sealing ring is fitted with the well wall, the upper sliding body, the lower sliding body and the supporting shell are enclosed to form an air storage space, an air intake channel is provided on the lower sliding body, and the air intake channel and the air storage space are connected, when the explosives under the lower sliding body explode, a part of the explosive gas pushes the fixed seat upward to move the fixed seat upward, the elastic member is compressed, and the sealing ring is pushed in the reverse direction, the sealing ring is squeezed and expanded, and the well wall is sealed; another part of the explosive gas enters the air storage space upward from the air intake channel, expands the air storage space, and pushes the upper sliding body The upper sliding body moves upward, and the lower sliding body moves downward, so that the abutting part abuts against the rock wall outward, thereby firmly fixing the device as a whole on the well wall. The explosive gas can only be under the upper sliding body and will not leak, thereby ensuring the fixing effect and blocking effect of the device; the position of the rock wall will not change, so the explosive gas entering the gas storage space is limited, the explosive gas will not overflow upward, and all of it will act on the well, reducing energy loss and ensuring the blasting effect on the well; after the pressure of the explosive gas decreases with the passage of time, the exhaust channel is opened to discharge the explosive gas in the gas storage space, and the fixing seat is reset, which is convenient for the recovery of the entire device, so that the device can be reused, the utilization rate is increased, and the blocking cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic diagram of the main structure of a sandstone uranium mine bottom blasting permeability enhancement and plugging device provided by an embodiment of the present invention; Figure 2 for Figure 1 An assembly cross-sectional view of the upper sliding body, the lower sliding body and the supporting shell used in the embodiment; Figure 3 for Figure 1 A schematic diagram of the structure of the sealing assembly used in; Figure 4 for Figure 3 A magnified view of middle; Figure 5 for Figure 1 Schematic diagram of the assembly of the bushing and the sealing ring used in; Figure 6 for Figure 1 Cross-sectional view of the expansion assembly used in.

[0018] Description of reference numerals: 1. Support shell; 11. Air storage space; 12. Limiting ring; 13. First air control space; 14. Second air control space; 15. Air passage; 2. upper sliding body; 21. sliding seat; 22. sliding column; 221. exhaust channel; 222. charging channel; 223. lead channel; 3. Lower sliding body; 30. Air inlet passage; 31. Sliding ring; 32. Sliding cylinder; 33. Graphite one-way valve; 4. expansion assembly; 41. connection seat; 42. abutment block; 5. Sealing assembly; 51. Fixing seat; 52. Retaining ring; 53. Elastic member; 54. Sealing ring; 55. Bushing; 551. Lining plate; 552. Limit retaining ring; 6. High temperature and high pressure resistant filter; 7. Pressure sensor; 8. Wire releaser; 81. Aluminum explosive support. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] It should be noted that the directions or positional relationships indicated by terms such as “length”, “width”, “height”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “head” and “tail” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the invention.

[0021] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0023] Please also read Figures 1 to 6 , the sandstone uranium mine bottom blasting and permeation enhancement and sealing device provided by the present invention is now described. The sandstone uranium mine bottom blasting and permeation enhancement and sealing device comprises a supporting shell 1, an upper sliding body 2, a lower sliding body 3, two expansion components 4 and a sealing component 5. The supporting shell 1 is cylindrical and vertically arranged; the upper sliding body 2 is slidably arranged in the supporting shell 1, and the top of the upper sliding body 2 protrudes from the top of the supporting shell 1, and the upper sliding body 2 is provided with an exhaust passage 221 which runs through from top to bottom; the lower sliding body 3 is slidably arranged in the supporting shell 1, and the bottom of the lower sliding body 3 protrudes from the bottom of the supporting shell 1, and an air storage space 11 is formed between the upper sliding body 2 and the lower sliding body 3, and the lower sliding body 3 is provided with an air intake passage 30 which runs through from top to bottom, and the air intake passage 30 and the exhaust passage 221 are respectively connected to the air storage space 11; the two expansion components 4 are respectively arranged at the two ends of the supporting shell 1, and the expansion component has a plurality of abutments which slide along its own radial direction. The upper sliding body 2 and the lower sliding body 3 are respectively slidably matched with the corresponding abutting parts, and can respectively push the corresponding abutting parts to slide outward until they abut against the rock wall; the sealing component 5 is arranged at the bottom end of the lower sliding body 3, and the sealing component 5 includes a fixed seat 51, an elastic member 53 and a sealing ring 54. The fixed seat 51 is slidably sleeved on the outer periphery of the lower sliding body 3, and the sealing ring 54 is arranged on the top of the fixed seat 51, and the outer diameter of the sealing ring 54 is equal to the outer diameter of the fixed seat 51. The two ends of the elastic member 53 are respectively connected to the supporting shell 1 and the sealing ring 54. The elastic member 53 can cooperate with the fixed seat 51 to squeeze the sealing ring 54, so that the outer diameter of the sealing ring 54 expands outward to seal the pre-tightening force of the well wall.

[0024] It should be noted that the upper sliding body 2 will not completely separate from the supporting shell 1 upwards, and the lower sliding body 3 will not completely separate from the supporting shell 1 downwards.

[0025] It should be noted that the exhaust passage 221 can be blocked, and when the explosive at the bottom of the blocking device explodes, the exhaust passage 221 is in a blocked state during the entire blocking process.

[0026] In specific implementation, the lower end of the lower sliding body 3 is connected with a wire releaser 8, and an aluminum explosive holder 81 is connected below the wire releaser 8. When the device is lowered, the aluminum explosive holder 81 is lowered at the same time, which speeds up the construction speed. The wire releaser 8 can control the relative distance between the aluminum explosive holder 81 and the device to prevent the device from being damaged by explosion. When in use, a wire mesh is set around the outer periphery of the wire releaser 8 to reduce the impact of the exploded fragments on the wire releaser 8.

[0027] It should be noted that when the explosion generates explosive gas, it also generates explosion energy, which pushes the fixing seat 51 to rise and squeeze the elastic member 53 .

[0028] Optionally, the elastic member 53 is a high-strength spring, and when the fixing seat 51 rises, the spring can be compressed, so that the spring reversely applies pressure to the sealing ring 54. The elastic member 53 can also be a tower spring, as long as it has a certain strength and high elasticity, which will not be listed here one by one.

[0029] In specific implementation, the sealing ring 54 is an extrusion type sealing ring. Since the sealing ring is made of elastic material, the sealing ring will deform elastically when under pressure, and the sealing ring 54 will fit the well wall more closely, increasing the contact area with the well wall, thereby improving the sealing force. Specifically, a rubber sealing ring, such as nitrile rubber, can be selected.

[0030] During specific implementation, a graphite one-way valve is provided at the bottom opening of the air inlet passage 30 to allow only the explosion gas to enter the gas storage space 11 .

[0031] Compared with the prior art, the sandstone uranium mine bottom blasting permeability plugging device provided in the present embodiment provides a sealing device for plugging the mine with the help of explosive gas, wherein the sealing ring 54 is fitted with the well wall, the upper sliding body 2, the lower sliding body 3 and the supporting shell 1 are enclosed to form an air storage space 11, and an air intake channel 30 is provided on the lower sliding body 3, and the air intake channel 30 is connected with the air storage space 11. When the explosives under the lower sliding body 3 explode, a part of the explosive gas pushes up the fixed seat 51 to move the fixed seat 51 upward, and the elastic member 53 is compressed, pushing the sealing ring 54 in the reverse direction, and the sealing ring 54 is squeezed and expanded to seal the well wall; another part of the explosive gas enters the air storage space 11 upward from the air intake channel 30, and fills the air storage space 11 with explosives. The upper sliding body 2 is expanded, pushing the upper sliding body 2 to move upward and the lower sliding body 3 to move downward, so that the abutting part abuts against the rock wall outward, and then the whole device is firmly fixed on the well wall, and the explosive gas can only be below the upper sliding body 2 and will not leak, thereby ensuring the fixing effect and blocking effect of the device; the position of the rock wall will not change, so the explosive gas entering the gas storage space 11 is limited, the explosive gas will not overflow upward, and all of it will act on the well, reducing energy loss and ensuring the blasting effect on the well; after the pressure of the explosive gas decreases with the passage of time, the exhaust channel 221 is opened to discharge the explosive gas in the gas storage space 11, and the fixing seat 51 is reset, which is convenient for the recovery of the entire device, so that the device can be reused, the utilization rate is increased, and the blocking cost is reduced.

[0032] In some embodiments, see Figure 2 , the two ends of the support shell 1 are respectively provided with limit rings 12, the limit ring 12 located at the top is used to limit the upward sliding stroke of the upper sliding body 2, and the limit ring 12 located at the bottom is used to limit the downward sliding stroke of the lower sliding body 3. The limit ring 12 is integrally cast with the support shell 1 to improve the structural strength. The limit ring 12 prevents the upper sliding body 2 and the lower sliding body 3 from separating from the support shell 1, and prevents the explosion gas from leaking and causing energy loss.

[0033] In some embodiments, see Figure 2The upper sliding body 2 includes a sliding seat 21 and a sliding column 22 integrally formed from bottom to top. The sliding seat 21 is slidably fitted with the inner wall of the supporting shell 1. The sliding column 22 is coaxially arranged with the sliding seat 21. An exhaust passage 221 is provided on the sliding column 22 and the sliding seat 21. The lower sliding body 3 includes a sliding ring 31 and a sliding cylinder 32 integrally formed from top to bottom. The outer periphery of the sliding ring 31 is slidably fitted with the inner wall of the supporting shell 1. The inner ring of the sliding ring 31 is connected with the inner cavity of the sliding cylinder 32 to form an air intake passage 30. An air storage space 11 is formed between the upper end surface of the sliding ring 31 and the lower end surface of the sliding seat 21. The sliding seat 21 and the sliding ring 31 slide inside the supporting shell 1 respectively and are blocked by the corresponding limit ring 12 to ensure that the sliding column 22 and the sliding cylinder 32 will not separate from the supporting shell 1, thereby ensuring the blocking effect of the device. The sliding seat 21 and the sliding column 22 are integrally cast, and the sliding ring 31 and the sliding cylinder 32 are integrally cast, which can improve their own strength.

[0034] In some embodiments, see Figure 2 The sliding seat 21, the sliding column 22, the limit ring 12 located at the top and the supporting shell 1 enclose an annular first air control space 13, and the sliding ring 31, the sliding cylinder 32, the limit ring 12 located at the bottom and the supporting shell 1 enclose an annular second air control space 14; the supporting shell 1 is provided with an air passage 15, and the two ends of the air passage 15 are respectively connected with the first air control space 13 and the second air control space 14; the sliding column 22 is provided with an air charging channel 222, the bottom end opening of the air charging channel 222 is arranged at the bottom periphery of the sliding column 22, and is connected with the first air control space 13, and the top end opening of the air charging channel 222 is arranged at the upper end surface of the sliding column 22.

[0035] In this embodiment, a channel for air intake and exhaust is provided. The gas enters the first air control space 13 from the inflation channel 222, then enters the air passage 15 from the first air control space 13, and finally enters the second air control space 14. The staff inflates along this path to expand the first air control space 13 and the second air control space 14 respectively, and then adjusts the distance between the upper sliding body 2 and the lower sliding body 3, so that the abutting part abuts against the rock wall for preliminary fixation, which is convenient for explosive detonation; when the explosive is detonated, the gas remaining in the first air control space 13 and the second air control space 14 flows out of the outside in the opposite direction along the path, ensuring that the upper sliding body 2 and the lower sliding body 3 can slide normally. The bottom opening of the inflation channel 222 is arranged at the bottom periphery of the sliding column 22, so that the inflation channel 222 is always connected with the first air control space 13 to avoid path interruption.

[0036] In some embodiments, referring to the figure, the expansion assembly 4 includes a connecting seat 41 and a plurality of abutment blocks 42, the connecting seat 41 is fixedly connected to the end of the supporting shell 1, a plurality of radial openings are opened on the outer periphery of the connecting seat 41, the abutment blocks 42 are slidably penetrated in the corresponding radial openings, and the abutment blocks 42 form an abutment portion; the outer end face of the abutment block 42 abuts against the well wall, the inner end face of the abutment block 42 located above abuts against the outer periphery of the sliding column 22, and the outer diameter of the sliding column 22 gradually increases from top to bottom; the inner end face of the abutment block 42 located below abuts against the outer periphery of the sliding cylinder 32, and the outer diameter of the sliding cylinder 32 gradually decreases from top to bottom.

[0037] In specific implementation, the connection seat 41 and the abutment block 42 are both metal components to ensure the strength of use during operation. The inner end surface of the abutment block 42 is an inclined surface, which abuts against the outer periphery of the sliding column 22 and the outer periphery of the sliding cylinder 32 respectively.

[0038] This embodiment provides a specific embodiment of the expansion assembly 4. When the upper sliding body 2 moves upward and the lower sliding body 3 moves downward, the outer periphery of the sliding column 22 moves upward to push the corresponding abutment block 42 to move outward until it abuts against the well wall, and the outer periphery of the sliding cylinder 32 moves downward to push the corresponding abutment block 42 to move outward until it abuts against the well wall. Since the explosive gas is located in the gas storage space 3, the upper sliding body 2 and the lower sliding body 3 cannot be reset, so that the abutment block 42 abuts against the well wall, and the limiting device as a whole moves in the up and down directions.

[0039] In some embodiments, see Figure 3 The outer periphery of the lower sliding body 3 is also provided with a retaining ring 52, which is located below the fixing seat 51 to limit the downward movement of the fixing seat 51. The retaining ring 52 is fixed to the bottom end of the lower sliding body 3, limiting the downward movement of the fixing seat 51, and can only move upward, thereby preventing the fixing seat 51 from being separated, and improving the tight connection of the device.

[0040] In specific implementation, a plurality of limit strips are provided on the outer periphery of the sliding cylinder 3, and the long axis of the limit strips is parallel to the long axis of the sliding cylinder 3. The inner ring of the fixed seat 51 is provided with a limit channel corresponding to the limit strip. The limit channel and the limit strip slide up and down to limit the rotation of the fixed seat 51 in the circumferential direction of the sliding cylinder 3, ensuring that the fixed seat 51 will only move up and down, and ensuring that the elastic member 53 can be compressed normally.

[0041] In some embodiments, the bottom surface of the fixed seat 51 is a concave cone, and a pressure sleeve, a compression screw sleeve, a pressure gasket and a sealing gasket are arranged on the top of the cone from bottom to top. The sealing gasket, the pressure gasket and the compression screw sleeve abut against each other to seal the gap between the fixed seat 51 and the sliding cylinder 32 to prevent gas from leaking from the gap. The pressure sleeve can play a certain buffering role, so that the explosive energy generated by the explosive gas does not directly act on the fixed seat 51, thereby avoiding damage to the fixed seat 51.

[0042] In some embodiments, see Figure 4 and Figure 5 The sealing assembly 5 also includes a bushing 55, which includes an annular liner 551 and a limit ring 552 arranged below the liner 551. The outer diameter of the liner 551 is larger than the outer diameter of the limit ring 552. The bottom of the liner 551 abuts against the sealing ring 54, and the top of the liner 551 is connected to the elastic member 53. The outer periphery of the limit ring 552 extends into and fits the inner ring of the sealing ring 54.

[0043] The bushing 55 provided in this embodiment is arranged between the elastic member 53 and the sealing ring 54. The contact area between the liner 551 and the elastic member 53 is large, which can reduce the impact force of the elastic member 53 on the sealing ring 54, protect the sealing ring 53, and prevent the sealing ring 53 from being damaged by excessive force. The limit retaining ring 552 is on the inner ring of the sealing ring 54. When the sealing ring 54 is compressed and expanded, it is blocked by the limit retaining ring 552, and the sealing ring 54 can only deform outward, thereby improving the sealing effect on the well wall. The limit retaining ring 552 can also prevent the sealing ring 54 from deflecting, thereby improving the stability during use.

[0044] In some embodiments, see Figure 1 and Figure 3 The bottom end of the air inlet passage 30 is provided with a pressure sensor 7 and a high temperature and high pressure filter 6. The pressure sensor 7 is used to detect the pressure generated by the explosion, and the high temperature and high pressure filter 6 is arranged below the pressure sensor 7. The pressure sensor 7 can detect the pressure generated by the explosion gas and feed back the data to the terminal (such as a mobile phone or a computer). The staff can judge the progress of the explosion based on the feedback data, and then judge whether to leak and recycle the device. The high temperature and high pressure filter 6 can block the gravel or blocks raised by the explosion, prevent the gravel or blocks from entering the lower sliding body 3 and affecting the normal sliding of the lower sliding body 3. At the same time, it can prevent the gravel from damaging the pressure sensor 7, thereby improving the protection effect of the pressure sensor 7 and extending the service life.

[0045] In some embodiments, the top opening of the exhaust channel 221 is provided with an exhaust check valve, which is connected to the pressure sensor 7 in communication, and can complete the return of the explosive gas. The exhaust check valve can control the flow direction of the gas to prevent the gas from entering the gas storage space 11 from above. After the exhaust check valve is connected to the pressure sensor 7 in communication, the pressure sensor 7 detects that the pressure of the explosive gas is lower than a certain value, and controls the exhaust check valve to open, so that the explosive gas in the gas storage space is discharged, and the abutment block 42 is loosened from the well wall. In this process, the elastic member 53 is subjected to a smaller upward pressure, and the elastic member 53 pushes the fixing seat 51 to reset. After resetting, the sealing ring 54 is restored, so that a gap is generated between the sealing ring 54 and the well wall, which is convenient for the overall recycling of the device.

[0046] In some embodiments, see Figure 1 and Figure 2 A vertical lead wire channel 223 is provided on the upper sliding body 2, and the lead wire channel 223 is connected to the gas storage space 11 and the air inlet channel 30, and a lead wire is passed through the lead wire channel 223. The lead wire channel 223 facilitates the installation of the lead wire, and the lead wire is connected to the aluminum explosive holder 81 for easy detonation.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sandstone uranium mine bottom blasting permeability enhancement and plugging device, It is characterized in that include: A supporting shell, wherein the supporting shell is cylindrical and arranged vertically; An upper sliding body is slidably disposed in the supporting shell, and the top of the upper sliding body protrudes from the top of the supporting shell, and the upper sliding body is provided with an exhaust passage that passes through from top to bottom; A lower sliding body is slidably disposed in the supporting shell, and the bottom of the lower sliding body protrudes from the bottom of the supporting shell, an air storage space is formed between the upper sliding body and the lower sliding body, and the lower sliding body is provided with an air intake channel that passes through from top to bottom, and the air intake channel and the exhaust channel are respectively communicated with the air storage space; Two expansion components are respectively arranged at the two ends of the support shell, and the expansion components have a plurality of abutment parts that slide along their own radial direction. The upper sliding body and the lower sliding body are respectively slidably matched with the corresponding abutment parts, and can respectively push the corresponding abutment parts to slide outward until they abut against the rock wall; as well as A sealing assembly is arranged at the bottom end of the lower sliding body, and the sealing assembly includes a fixed seat, an elastic member and a sealing ring. The fixed seat is slidably sleeved on the outer periphery of the lower sliding body, the sealing ring is arranged on the top of the fixed seat, and the outer diameter of the sealing ring is equal to the outer diameter of the fixed seat. The two ends of the elastic member are respectively connected to the supporting shell and the sealing ring. The elastic member can cooperate with the fixed seat to squeeze the sealing ring, so that the outer diameter of the sealing ring expands outward to seal the well wall.

2. The sandstone uranium mine bottom blasting permeability enhancement and plugging device as claimed in claim 1, It is characterized in that Limiting rings are respectively provided at both ends of the supporting shell, the limiting ring located at the upper end is used to limit the upward sliding stroke of the upper sliding body, and the limiting ring located at the lower end is used to limit the downward sliding stroke of the lower sliding body.

3. The sandstone uranium mine bottom blasting permeability enhancement and plugging device as claimed in claim 2, It is characterized in that The upper sliding body comprises a sliding seat and a sliding column integrally formed from bottom to top, the sliding seat is slidingly fitted with the inner wall of the supporting shell, the sliding column is coaxially arranged with the sliding seat, and the exhaust channel is opened on the sliding column and the sliding seat; The lower sliding body includes a sliding ring and a sliding cylinder integrally formed from top to bottom, the outer periphery of the sliding ring slidingly fits with the inner wall of the supporting shell, the inner ring of the sliding ring is connected with the inner cavity of the sliding cylinder to form the air inlet channel, and the air storage space is formed between the upper end surface of the sliding ring and the lower end surface of the sliding seat.

4. The sandstone uranium mine bottom blasting permeability enhancement and plugging device as claimed in claim 3, It is characterized in that The sliding seat, the sliding column, the limiting ring located above and the supporting shell form a first annular air control space, and the sliding ring, the sliding cylinder, the limiting ring located below and the supporting shell form a second annular air control space; The supporting shell is provided with an air passage, and the two ends of the air passage are respectively connected with the first air control space and the second air control space; the sliding column is provided with an inflation channel, the bottom end opening of the inflation channel is arranged on the bottom periphery of the sliding column and is connected with the first air control space, and the top end opening of the inflation channel is arranged on the upper end surface of the sliding column.

5. The sandstone uranium mine bottom blasting permeability enhancement and plugging device as claimed in claim 3, It is characterized in that The expansion assembly includes a connection seat and a plurality of abutment blocks, the connection seat is fixedly connected to the end of the support shell, a plurality of radial openings are opened on the outer circumference of the connection seat, the abutment blocks are slidably arranged in the corresponding radial openings, and the abutment blocks form the abutment portion; The outer end face of the abutment block abuts against the well wall, the inner end face of the abutment block located above abuts against the outer periphery of the sliding column, and the outer diameter of the sliding column gradually increases from top to bottom; the inner end face of the abutment block located below abuts against the outer periphery of the sliding cylinder, and the outer diameter of the sliding cylinder gradually decreases from top to bottom.

6. The sandstone uranium mine bottom blasting permeability enhancement and plugging device according to claim 1, It is characterized in that A retaining ring is also provided on the outer periphery of the lower sliding body, and the retaining ring is located below the fixing seat to limit the downward movement of the fixing seat.

7. The sandstone uranium mine bottom blasting permeability enhancement and plugging device according to claim 1, It is characterized in that The sealing assembly also includes a bushing, which includes an annular lining plate and a limit retaining ring arranged below the lining plate. The outer diameter of the lining plate is larger than the outer diameter of the limit retaining ring. The bottom of the lining plate abuts against the sealing ring, the top of the lining plate is connected to the elastic member, and the outer periphery of the limit retaining ring extends into and fits the inner ring of the sealing ring.

8. The sandstone uranium mine bottom blasting permeability enhancement and plugging device as claimed in claim 1, It is characterized in that A pressure sensor and a high-temperature and high-pressure filter are provided at the bottom end of the air intake passage. The pressure sensor is used to detect the pressure generated by the explosion, and the high-temperature and high-pressure filter is provided below the pressure sensor.

9. The sandstone uranium mine bottom blasting permeability enhancement and plugging device as claimed in claim 8, It is characterized in that A one-way valve is provided at the top opening of the exhaust passage, and the one-way valve is communicatively connected with the pressure sensor.

10. The sandstone uranium mine bottom blasting permeability enhancement and plugging device according to claim 1, It is characterized in that A vertically arranged lead wire channel is provided on the upper sliding body, the lead wire channel is communicated with the air storage space and the air intake channel, and a lead wire is passed through the lead wire channel.

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