Dust fall device for coal mining blasting

Abstract

The invention discloses a dust fall device for coal mining blasting, and relates to the field of coal mining equipment, the dust fall device comprises a water stemming bag and a protective net pad, a plurality of compressed air chambers are arranged outside the water stemming bag, a plurality of explosion partition areas are arranged on the protective net pad, and the explosion partition areas are communicated with one another; the upper portion and the lower portion of the protective net pad are both connected with air adjusting pieces, and the air adjusting pieces communicate with the explosion partition area. According to the dust falling device for mine mining blasting, the water stemming bag has the dust falling effect in a shot hole, the protective net pad has the dust falling effect outside the shot hole, the movable body plugged in the explosion partition area slides, and therefore the dust falling effect is achieved; when the blasthole is exploded, compressed air is released, meanwhile, the foaming agent filled in the blasthole is rapidly expanded after high pressure, so that heat exploded at the blasthole can be rapidly absorbed, and meanwhile, the expanded foaming agent can rapidly wrap dust and broken stones generated after explosion.

Description

Technical Field

[0001] The invention relates to the technical field of coal mining equipment, in particular to a dust suppression device for coal mining blasting. Background Art

[0002] Coal mining can be divided into open-pit mining and underground mining. Regardless of the mining method, a large amount of smoke and dust will be generated during and after the mining process. For open-pit mining, spray dust reduction treatment is usually carried out by anti-aircraft guns, etc. For underground mining, when blasting is used for mining, water-bubbled mud and other methods are usually used for dust reduction.

[0003] For underground blasting mining, the blister mud dust reduction method is used. The blister mud is made by injecting water into a cylindrical polyethylene plastic bag and sealing it. The diameter of the bag is slightly smaller than the diameter of the blasthole. After the explosive is inserted into the blasthole, the blister mud is then inserted into the blasthole. When the explosive explodes, the blister mud forms a water curtain for dust reduction. The existing Chinese patent publication number is CN106643363B, which discloses a blasthole plugging device for underground coal mining. The outer hemisphere design is used to differentiate the rock blocks to avoid the generation of large rock blocks, thereby improving the dust reduction effect of the blister mud. However, a large amount of heat is still generated during the explosion process. The heat mixes with the broken stones under the action of the water curtain to form a large amount of smoke, which is not conducive to the rapid dust reduction of the water in the blister mud. Moreover, the broken stones, mud, etc. are easily mixed with water, which is not conducive to rapid dust reduction at the blasthole. For this reason, we propose a dust reduction device for coal mining blasting. Summary of the invention

[0004] The object of the present invention is to provide a dust suppression device for coal mining blasting to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a dust suppression device for coal mining blasting, comprising a water cannon mud bag and a protective mesh pad, a plurality of compressed air chambers are arranged on the outside of the water cannon mud bag, a plurality of explosion isolation zones are opened on the protective mesh pad, and the explosion isolation zones are interconnected, the upper and lower parts of the protective mesh pad are connected with air adjustment parts, and the air adjustment parts are connected with the explosion isolation zones; the explosion isolation zones are connected with a capsule loaded with a foaming agent, and the bottom of the capsule is connected with a movable body penetrated in the middle of the explosion isolation zone, the bottom of the movable body is in contact with the water cannon mud bag, and the telescopic movement of the movable body drives the air compression change in the explosion isolation zone; the outside of the movable body is connected with a dispersion component for dispersing stones.

[0006] Preferably, the explosion isolation zone includes a cross pad assembled on the protective mesh pad, and there is an air hole at the connection between the cross pad and the air adjustment part, the cross pad is provided with multiple layers of arc grooves, and the dispersion components are distributed at the arc grooves, a sliding hole is provided in the middle position of the cross pad, and the sliding hole is connected to the air hole, and the movable body is movably inserted inside the sliding hole.

[0007] Preferably, the movable body includes a connecting rod connected to the bottom of the sac body, the connecting rod is provided with a telescopic section, and the telescopic section is distributed inside the sliding hole, the diameter of the telescopic section is smaller than the diameter of the connecting rod, and the bottom of the connecting rod is connected to a collision body that contacts the water cannon mud bag.

[0008] Preferably, four elastic rods are connected to the outside of the capsule, tear holes are provided at four corners of the explosion isolation zone, and one end of the elastic rod is connected to the inside of the tear hole.

[0009] Preferably, a cracking groove is provided on the outside of the capsule.

[0010] Preferably, a plug is connected to the bottom of the telescopic section. The plug is made of rubber, and the diameters of both ends of the plug are smaller than the diameter of the sliding hole, while the middle diameter of the plug is larger than the diameter of the sliding hole.

[0011] Preferably, the air adjustment member comprises a tube body connected to the upper and lower parts of the protective mesh pad, and a compressed air bag is provided inside the tube body, and the compressed air bag is connected to the air hole.

[0012] Preferably, the dispersion component includes a first dispersion piece connected to the telescopic rod, and the second dispersion piece is connected to the outside of the plug block. The first dispersion piece and the second dispersion piece are both provided with arc segments on the outside, and the arc segments slide in the arc grooves. The diameter of the first dispersion piece is larger than the diameter of the second dispersion piece.

[0013] Preferably, the water cannon mud bag has a plurality of concave sections on its exterior.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The explosion isolation zone arranged on the protective mesh pad of the present invention is used to align with the blast hole position. After the water cannon mud bag is inserted into the blast hole, the blasting generates heat and high pressure to impact the movable body in the explosion isolation zone, thereby causing the movable body inserted in the explosion isolation zone to slide, and the air inside the compressed air bag is released to the air hole. At the same time, the foaming agent filled in the bag body expands rapidly after high pressure, which is conducive to quickly absorbing the heat exploded at the blast hole. At the same time, the expanded foaming agent can quickly wrap up the dust and gravel generated after the blasting, thereby avoiding the volatilization of gravel and dust, and improving the dust absorption efficiency after the blasting.

[0016] The present invention adds a compressed air chamber and an inner concave section to the water cannon mud bag, so that after the water cannon mud bag is heated and exploded in the blasthole, compressed air is quickly charged into the water cannon mud bag, thereby causing the water in the water cannon mud bag to quickly diffuse and form a water curtain, which is beneficial to the dust absorption and treatment at the blasthole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the partial explosion structure of the present invention;

[0019] Figure 3 It is a structural schematic diagram of the protective mesh pad and the air adjustment member of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of the water monitor mud bag of the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of a single explosion isolation zone and a movable body of the present invention;

[0022] Figure 6 This is a schematic diagram of the structure of a single explosion isolation zone of the present invention;

[0023] Figure 7 It is a schematic diagram of the structure of the movable body and the dispersed components of the present invention;

[0024] Figure 8 It is a schematic diagram of the structure of the capsule and the movable body of the present invention;

[0025] Fig. 9 It is a schematic diagram of the structure of the dispersed components of the present invention.

[0026] In the figure: 1-water cannon mud bag; 2-protective mesh pad; 3-explosion isolation zone; 4-air adjustment part; 5-bladder; 6-movable body; 7-dispersion component; 11-compressed air chamber; 12-concave section; 31-cross pad; 32-arc groove; 33-sliding hole; 34-air hole; 35-tear hole; 41-tube body; 42-compressed air bag; 51-elastic rod; 52-cracking groove; 61-connecting rod; 62-telescopic section; 63-collision body; 64-block; 71-first dispersion sheet; 72-second dispersion sheet; 73-arc section. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 9 The present invention provides a technical solution: a dust reduction device for coal mining blasting, which is used to solve the problem of dust absorption in the existing coal mine blasting process. The design in this solution includes a water cannon mud bag 1 and a protective mesh pad 2, so that the water cannon mud bag 1 has a dust reduction effect inside the blasthole, and the protective mesh pad 2 has a dust reduction effect outside the blasthole. The water cannon mud bag 1 is made of polyethylene plastic, and a plurality of compressed air chambers 11 are provided on the outside of the water cannon mud bag 1. The water cannon mud bag 1 has a plurality of concave sections 12 on the outside. Before the water bubble mud bag 1 is used, water is flushed into the bag, and then the compressed air chamber 11 is filled with compressed air. The compressed air is an endothermic gas, such as carbon dioxide, helium, etc., which reduces air and increases combustion after the explosion. When the explosive explodes at the blasthole position, the specific air pressure and heat generated cause the compressed air in the compressed air chamber 11 to squeeze into the water cannon mud bag. 1, wherein the compressed air chamber 11 and the water cannon mud bag 1 are formed by plastic injection molding. Under pressure, the connection between the compressed air chamber 11 and the outer wall of the water cannon mud bag 1 can be quickly broken, thereby accelerating the water in the water cannon mud bag 1 to form a water curtain in the event of an explosion. At the same time, the concave section 12 designed on the outer wall of the water cannon mud bag 1 makes the water cannon mud bag 1 have a certain elasticity, so that under pressure, it is easy to squeeze out the water in the water cannon mud bag 1, accelerate the mixing and absorption of the water in the water cannon mud bag 1 and the air in the blast hole after the explosion, thereby achieving the effect of reducing dust.

[0029] For the protection and dust reduction of the outside of the blasthole, a plurality of explosion isolation zones 3 are provided on the protection mesh pad 2, and each explosion isolation zone 3 is interconnected. The upper and lower parts of the protection mesh pad 2 are both connected with air adjustment parts 4, and the air adjustment parts 4 are connected with the explosion isolation zones 3;

[0030] The explosion isolation zone 3 is connected to a capsule 5 loaded with a foaming agent, and the bottom of the capsule 5 is connected to a movable body 6 that penetrates the middle of the explosion isolation zone 3. The bottom of the movable body 6 is in contact with the water monitor mud bag 1, and the telescopic movement of the movable body 6 drives the air compression change in the explosion isolation zone 3;

[0031] The explosion isolation zone 3 provided on the protective mesh pad 2 is used to align with the blasthole position. After the water cannon mud bag 1 is inserted into the blasthole, the blasting generates heat and high pressure to impact the movable body 6 of the explosion isolation zone 3, so that the movable body 6 inserted in the explosion isolation zone 3 slides, and the air inside the compressed air bag 42 is released to the air hole. At the same time, the foaming agent filled in the capsule 5 expands rapidly after high pressure, which is conducive to quickly absorbing the heat exploded at the blasthole. At the same time, the expanded foaming agent can quickly wrap up the dust and gravel generated after the blasting, avoiding the volatilization of gravel and dust, and improving the dust absorption efficiency after the blasting.

[0032] For protection of the outside of the blasthole, refer to the attached Figure 5 -Attached Figure 8 It can be seen that the explosion isolation zone 3 includes a cross pad 31 assembled on the protective mesh pad 2, and there is an air hole 34 at the connection between the cross pad 31 and the air adjustment part 4, a multi-layer arc groove 32 is opened on the cross pad 31, and the dispersion component 7 is distributed at the arc groove 32, a sliding hole 33 is opened in the middle position of the cross pad 31, and the sliding hole 33 is connected with the air hole 34, and the movable body 6 is movably inserted in the sliding hole 33.

[0033] The movable body 6 includes a connecting rod 61 connected to the bottom of the sac body 5, and a telescopic section 62 is provided on the connecting rod 61, and the telescopic section 62 is distributed inside the sliding hole 33. The diameter of the telescopic section 62 is smaller than the diameter of the connecting rod 61, and the bottom of the connecting rod 61 is connected to a collision body 63 that contacts the water cannon mud bag 1.

[0034] Four elastic rods 51 are connected to the outside of the capsule 5. The four corners of the explosion isolation zone 3 are provided with tear holes 35, and one end of the elastic rod 51 is connected to the inside of the tear hole 35. A cracking groove 52 is provided on the outside of the capsule 5. A plug 64 is connected to the bottom of the telescopic section 62. The plug 64 is made of rubber, and the diameters of both ends of the plug 64 are smaller than the diameter of the sliding hole 33, and the middle diameter of the plug 64 is larger than the diameter of the sliding hole 33. The air adjustment member 4 includes a tube body 41 connected to the upper and lower parts of the protective mesh pad 2, and a compressed air bag 42 is provided inside the tube body 41, and the compressed air bag 42 is connected to the air hole 34.

[0035] When the explosive explodes at the blasthole position, a large amount of heat and air are generated, which first impact the water cannon mud bag 1 inside the blasthole. After the water cannon mud bag 1 ruptures, the water inside the water cannon mud bag 1 initially absorbs the heat and hot air formed in the blasthole, and the heat inside the blasthole impacts outward to hit the collision body 63. The collision body 63 moves the connecting rod 61 upward, so that the large diameter part of the plug 64 impacts the sliding hole 33, so that the sliding hole 33 and the air hole 34 are torn, thereby releasing the compressed air inside the compressed air bag 42. During the upward movement of the connecting rod 61, the cracking groove 52 on the top of the capsule 5 is cracked, which is convenient for releasing the compressed air stored in the capsule. 5 is released, and when the foaming agent contacts a large amount of compressed air, it quickly foams into foam under the condition of heat, and the explosion position is wrapped by foam to absorb dust and gravel, thereby achieving the effect of dust reduction. The above process occurs at the moment of blasting. The specific heat and air pressure generated by the blasting will quickly impact the bottom of the movable body 6, and at the same time tear the explosion partition area 3. In the case of tearing of the explosion partition body 3, and when the impact force of the movable body 6 is not large, it impacts the capsule 5, which will cause the foaming agent stored in the capsule 5 to quickly mix with the heat under the condition of compressed air and foam into foam, and then quickly absorb.

[0036] For the scattered references generated at any time during blasting Fig. 9 As shown, the movable body 6 is connected to a dispersing assembly 7 for dispersing stones on the outside, and the dispersing assembly 7 includes a first dispersing sheet 71 connected to the telescopic rod, and a second dispersing sheet 72 is connected to the outside of the plug 64. The first dispersing sheet 71 and the second dispersing sheet 72 are both provided with an arc segment 73 on the outside, and the arc segment 73 slides in the arc groove 32, and the diameter of the first dispersing sheet 71 is larger than the diameter of the second dispersing sheet 72. When the blasting heat impacts the collision body 63 at the bottom of the movable rod 6, the movable rod 6 moves up and down, thereby driving the first dispersing sheet 71 and the second dispersing sheet 72 installed on the movable rod 6 to shake, thereby dispersing the crushed stones at the explosion isolation zone 3, which is conducive to the absorption of the crushed stones after foaming.

[0037] When using the device of this scheme, first determine the position and area of ​​blasting. The area size of the protective mesh pad 2 in this scheme is selected according to the blasting area. The tube body 41 installed on the upper and lower parts is used to fix with the blasting area. It is fixed from the upper position of the protective mesh pad 2 and the blasting wall by fixing structures such as screws. After the blasthole is selected, the explosive is inserted into the blasthole, and the water cannon mud bag 1 is inserted into the blasthole at the same time. Then, a part of the explosion isolation zone 3 corresponding to the blasthole is pressed downward so that the collision body 63 can contact the water cannon mud bag 1. Finally, the bottom of the protective mesh pad 2 is fixed by screws so that the protective mesh pad 2 is fixed as a whole at the explosion surface position. After the explosive is detonated, the specific air pressure and heat generated at this time cause the compressed air in the compressed air chamber 11 to squeeze into the water cannon mud bag 1, wherein the compressed air chamber 11 and the water cannon mud bag 1 are formed by plastic injection molding. Under pressure, the connection between the compressed air chamber 11 and the outer wall of the water cannon mud bag 1 can be quickly ruptured, thereby accelerating the water in the water cannon mud bag 1 to form a water curtain under the explosion. At the same time, the concave section 12 designed on the outer wall of the water cannon mud bag 1 makes the water cannon mud bag 1 have a certain elasticity, so that under pressure, it is easy to squeeze out the water inside the water cannon mud bag 1, accelerate the mixing and absorption of the water inside the water cannon mud bag 1 and the air in the blast hole after the explosion, thereby achieving dust reduction. The effect is that when the explosive explodes at the blasthole position, a large amount of heat and air are generated, which first impact the water cannon mud bag 1 inside the blasthole. After the water cannon mud bag 1 ruptures, the water inside the water cannon mud bag 1 initially absorbs the heat and hot air formed in the blasthole, and the heat inside the blasthole impacts outward to hit the collision body 63. The collision body 63 moves the connecting rod 61 upward, so that the large diameter part of the plug 64 impacts the sliding hole 33, so that the sliding hole 33 and the air hole 34 are torn, thereby releasing the compressed air inside the compressed air bag 42. During the upward movement of the connecting rod 61, the cracking groove 52 on the top of the capsule 5 is cracked, which is convenient for releasing the compressed air stored in The foaming agent inside the capsule 5 is released, and when the foaming agent comes into contact with a large amount of compressed air, it quickly foams into foam under the condition of heat, and wraps the explosion position with foam to absorb dust and gravel, thereby achieving the effect of dust reduction. The above process occurs at the moment of blasting. The specific heat and air pressure generated by the blasting will quickly impact the bottom of the movable body 6, and at the same time tear the explosion partition area 3. In the case of tearing of the explosion partition body 3, and when the impact force of the movable body 6 is not large and it impacts the capsule 5, the foaming agent stored in the capsule 5 will be quickly mixed with heat under the condition of compressed air to foam into foam, and then quickly absorbed.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust suppression device for coal mining blasting, comprising a water cannon mud bag (1) and a protective mesh pad (2), characterized in that: The water monitor mud bag (1) is provided with a plurality of compressed air chambers (11) on the outside, the protective mesh pad (2) is provided with a plurality of explosion isolation zones (3), and the explosion isolation zones (3) are interconnected, and the upper and lower parts of the protective mesh pad (2) are both connected to air adjustment components (4), and the air adjustment components (4) are in communication with the explosion isolation zones (3); The explosion isolation zone (3) is connected to a capsule (5) loaded with a foaming agent, and the bottom of the capsule (5) is connected to a movable body (6) penetrating the middle of the explosion isolation zone (3), the bottom of the movable body (6) is in contact with the water monitor mud bag (1), and the telescopic movement of the movable body (6) drives the air compression change in the explosion isolation zone (3); The outside of the movable body (6) is connected to a dispersing assembly (7) for dispersing stones.

2. A dust suppression device for coal mining blasting according to claim 1, characterized in that: The explosion isolation zone (3) includes a cross pad (31) assembled on the protective mesh pad (2), and an air hole (34) is provided at the connection between the cross pad (31) and the air adjustment component (4). The cross pad (31) is provided with multiple layers of arc grooves (32), and the dispersion components (7) are distributed at the arc grooves (32). A sliding hole (33) is provided at the middle position of the cross pad (31), and the sliding hole (33) is connected to the air hole (34), and the movable body (6) is movably inserted in the sliding hole (33).

3. A dust suppression device for coal mining blasting according to claim 2, characterized in that: The movable body (6) comprises a connecting rod (61) connected to the bottom of the sac body (5), the connecting rod (61) is provided with a telescopic section (62), and the telescopic section (62) is distributed inside the sliding hole (33), the diameter of the telescopic section (62) is smaller than the diameter of the connecting rod (61), and the bottom of the connecting rod (61) is connected to a collision body (63) in contact with the water cannon mud bag (1).

4. A dust suppression device for coal mining blasting according to claim 3, characterized in that: Four elastic rods (51) are connected to the outside of the capsule (5), tear holes (35) are provided at four corners of the explosion isolation zone (3), and one end of the elastic rod (51) is connected to the inside of the tear hole (35).

5. A dust suppression device for coal mining blasting according to claim 4, characterized in that: The capsule (5) is provided with a cracking groove (52) on the outside.

6. A dust suppression device for coal mining blasting according to claim 3, characterized in that: The bottom of the telescopic section (62) is connected to a plug (64), the plug (64) is made of rubber, and the diameters of both ends of the plug (64) are smaller than the diameter of the sliding hole (33), while the middle diameter of the plug (64) is larger than the diameter of the sliding hole (33).

7. A dust suppression device for coal mining blasting according to claim 2, characterized in that: The air adjustment member (4) comprises a tube body (41) connected to the upper and lower parts of the protective mesh pad (2), and a compressed air bag (42) is arranged inside the tube body (41), and the compressed air bag (42) is communicated with the air hole (34).

8. The dust suppression device for coal mining blasting according to claim 6, characterized in that: The dispersion assembly (7) comprises a first dispersion piece (71) connected to the telescopic rod, and the plug (64) is externally connected to a second dispersion piece (72). The first dispersion piece (71) and the second dispersion piece (72) are both externally provided with arc segments (73), and the arc segments (73) slide in the arc groove (32). The diameter of the first dispersion piece (71) is greater than the diameter of the second dispersion piece (72).

9. The dust suppression device for coal mining blasting according to claim 1, characterized in that: The water monitor mud bag (1) has a plurality of concave sections (12) on the outside.

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