A dust suppression device for coal mining blasting

Abstract

The invention discloses a dust suppression device for coal mining blasting, which relates to the field of coal mining equipment, including a water cannon mud bag and a protective mesh pad, wherein a plurality of compressed air chambers are provided 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, and the upper and lower parts of the protective mesh pad are both connected with air adjustment components, and the air adjustment components are connected with the explosion isolation zones; a capsule and a movable body are connected to the explosion isolation zone, the bottom of the movable body is in contact with the water cannon mud bag, and the outside of the movable body is connected with a dispersion component for dispersing stones, in this dust suppression device for coal mining blasting, the water cannon mud bag has a dust suppression effect in the blasthole, and the protective mesh pad has a dust suppression effect outside the blasthole, the movable body plugged in the explosion isolation zone slides to release compressed air, and at the same time the foaming agent filled in the capsule quickly expands after high pressure, thereby facilitating the rapid absorption of heat exploded at the blasthole, and at the same time the expanded foaming agent can quickly wrap up the dust and gravel generated after the blasting.

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-soaked mud and other methods are usually used for dust reduction.

[0003] For underground blasting mining, the bubble mud dust reduction method used is that the bubble 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 explosives are stuffed into the blasthole, the bubble mud is then stuffed into the blasthole. When the explosives explode, the bubble mud forms a water curtain for dust reduction. The existing Chinese patent publication number is CN106643363B, which discloses a coal mine underground mining blasthole plugging device. The device adopts an outer hemisphere design to differentiate the rock blocks to avoid the generation of large rock blocks, thereby improving the dust reduction effect of the bubble 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 bubble mud. In addition, 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 mine blasting. Summary of the Invention

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

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a dust suppression device for coal mine blasting, comprising a water cannon mud bag and a protective mesh pad, wherein the outside of the water cannon mud bag is provided with a plurality of compressed air chambers, the protective mesh pad is provided with a plurality of explosion isolation zones, 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 passing through 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 in 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, 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 the 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 includes 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 a second dispersion piece is connected to the outside of the plug. 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 groove. The diameter of the first dispersion piece is larger than the diameter of the second dispersion piece.

[0013] Preferably, there are multiple concave sections on the outside of the water monitor mud bag.

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

[0015] The explosion isolation zone provided on the protective mesh pad of the present invention is used to align with the position of the blast hole. 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 blast, avoiding the volatilization of gravel and dust, and improving the dust absorption efficiency after the blast.

[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 This is a schematic diagram of the partial explosion structure of the present invention;

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

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

[0021] Figure 5 This 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 structural diagram of the movable body and dispersed components of the present invention;

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

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

[0026] In the figure: 1-water cannon mud bag; 2-protective mesh pad; 3-explosion isolation area; 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 piece; 72-second dispersion piece; 73-arc section. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0028] See also Figures 1-9 The present invention provides a technical solution: a dust suppression 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 can reduce dust inside the blasthole, and the protective mesh pad 2 can reduce dust 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 cannon 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 a heat-absorbing 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 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 the effect of reducing dust.

[0029] For protection of the outside of the blasthole and dust reduction, the protective mesh pad 2 is provided with multiple explosion isolation zones 3, and each explosion isolation zone 3 is interconnected. The upper and lower parts of the protective mesh pad 2 are both connected to air adjustment parts 4, and the air adjustment parts 4 are connected to 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 passes through 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, thereby causing the movable body 6 plugged in the explosion isolation zone 3 to slide, 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. 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 in the middle position of the cross pad 31, and the sliding hole 33 is connected to the air hole 34. The movable body 6 is movably inserted into the sliding hole 33.

[0033] The movable body 6 includes a connecting rod 61 connected to the bottom of the sac 5, and a telescopic section 62 is provided on the connecting rod 61. 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 monitor mud bag 1.

[0034] Four elastic rods 51 are connected to the outside of the sac 5. Tear holes 35 are provided at the four corners of the explosion isolation zone 3, and one end of each elastic rod 51 is connected to the inside of the tear hole 35. A cracking groove 52 is provided on the outside of the sac 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 the two ends of the plug 64 are smaller than the diameter of the sliding hole 33, while the diameter of the middle of the plug 64 is larger than the diameter of the sliding hole 33. The air adjustment component 4 includes a tube 41 connected to the upper and lower parts of the protective mesh pad 2. A compressed air bag 42 is provided inside the tube 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 breaks, 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 the collision body 63 outward. The collision body 63 moves the connecting rod 61 upward, so that the part with a larger diameter 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 comes into contact with a large amount of compressed air, it quickly foams into foam under the condition of heat, and wraps the explosion site 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 isolation area 3. In the case of tearing of the explosion isolation 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 it.

[0036] For the scattered references generated during blasting Figure 9 As shown, the movable body 6 is externally connected to a dispersing assembly 7 for dispersing the rocks. The dispersing assembly 7 includes a first dispersing piece 71 connected to the telescopic rod, and a second dispersing piece 72 externally connected to the plug 64. Both the first and second dispersing pieces 71 and 72 are externally provided with arcuate segments 73, which slide in the arcuate grooves 32. The diameter of the first dispersing piece 71 is larger than that of the second dispersing piece 72. When the heat of the blast impacts the collision body 63 at the bottom of the movable rod 6, the movable rod 6 moves up and down, thereby causing the first and second dispersing pieces 71 and 72 mounted on the movable rod 6 to vibrate, thereby dispersing the rocks in the explosion isolation zone 3, which facilitates the absorption of the rocks 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 be fixed to the blasting area. It is fixed from the upper position of the protective mesh pad 2 to the blasting wall by fixing structures such as screws. After the blast hole is selected, the explosives are stuffed into the blast hole, and the water cannon mud bag 1 is stuffed into the blast hole at the same time. Then, the explosion isolation zone 3 corresponding to the blast hole is pressed downward a part 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 to 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 interior of 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 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 the purpose of reducing dust. 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 the collision body 63 outward. The collision body 63 moves the connecting rod 61 upward, so that the part with a larger diameter 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. In the process of the connecting rod 61 moving upward, 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 cause a tearing of the explosion partition area 3. When the explosion partition body 3 is torn, and the impact of the movable body 6 on the capsule 5 is not strong, the foaming agent stored in the capsule 5 will be quickly mixed with the heat under the condition of compressed air to foam, and then quickly absorbed.

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

[0039] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the 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 parts (4), and the air adjustment parts (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) passing through 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 movable body (6) moves in a telescopic manner to drive the air compression change in the explosion isolation zone (3); The outside of the movable body (6) is connected to a dispersion component (7) for dispersing stones; 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 member (4), the cross pad (31) is provided with a multi-layer arc groove (32), and the dispersion component (7) is distributed at the arc groove (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 into the sliding hole (33); The movable body (6) includes a connecting rod (61) connected to the bottom of the capsule (5), 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).

2. The dust suppression device for coal mining blasting according to claim 1, characterized in that: Four elastic rods (51) are connected to the outside of the capsule (5), tear holes (35) are provided at the 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).

3. The dust suppression device for coal mining blasting according to claim 2, characterized in that: The capsule (5) is provided with a cracking groove (52) on the outside.

4. The dust suppression device for coal mining blasting according to claim 1, 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).

5. The dust suppression device for coal mining blasting according to claim 1, 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 provided inside the tube body (41), and the compressed air bag (42) is communicated with the air hole (34).

6. The dust suppression device for coal mining blasting according to claim 4, 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 an arc segment (73), and the arc segment (73) slides in the arc groove (32). The diameter of the first dispersion piece (71) is larger than the diameter of the second dispersion piece (72).

7. 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.

Images