CN111323354A - Device for simulating and evaluating coal dust suppression effect in coal mining process - Google Patents
Device for simulating and evaluating coal dust suppression effect in coal mining process Download PDFInfo
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- 239000002817 coal dust Substances 0.000 title claims abstract description 73
- 230000001629 suppression Effects 0.000 title claims abstract description 56
- 239000003245 coal Substances 0.000 title claims abstract description 55
- 238000005065 mining Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000008569 process Effects 0.000 title claims abstract description 24
- 239000000428 dust Substances 0.000 claims abstract description 132
- 238000002474 experimental method Methods 0.000 claims abstract description 55
- 239000007921 spray Substances 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000006260 foam Substances 0.000 claims abstract description 26
- 239000000779 smoke Substances 0.000 claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 239000003595 mist Substances 0.000 claims abstract description 21
- 238000005507 spraying Methods 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims description 11
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- 238000005187 foaming Methods 0.000 claims description 10
- 239000012780 transparent material Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000011156 evaluation Methods 0.000 abstract description 14
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- 238000010276 construction Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000004088 simulation Methods 0.000 description 19
- 238000009423 ventilation Methods 0.000 description 11
- 239000003795 chemical substances by application Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
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- 238000004519 manufacturing process Methods 0.000 description 5
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- 238000002791 soaking Methods 0.000 description 2
- 241000668854 Howardia biclavis Species 0.000 description 1
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- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
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- 230000007123 defense Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
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- 238000004080 punching Methods 0.000 description 1
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Abstract
The invention discloses a device for simulating and evaluating a coal dust suppression effect in a coal mining process, which relates to the technical field of coal dust environmental control in coal mining and comprises an axial flow fan, an experiment cabin high-speed section, an experiment cabin low-speed section and an exhaust section, wherein the experiment cabin high-speed section, the experiment cabin low-speed section and the exhaust section are respectively provided with a smoke detection device; a coal dust generating device is detachably arranged at the bottom in the low-speed section of the experiment chamber; the spraying system is provided with a plurality of nozzles which can respectively spray water mist, dust suppressant and foam; meanwhile, the coal dust generating device can simulate the process of generating dust by a coal cutter and the process of discharging dust-removing sewage. The device can realize comprehensive evaluation of the coal dust suppression effect by simulating the coal dust environment in actual mining and simulating and contrastively analyzing the dust suppression effect under different dust suppression measures, and has guiding significance for the arrangement of a dust removal and suppression system and the design of a dust removal and suppression construction method in actual coal mine operation.
Description
Technical Field
The invention relates to the technical field of coal mining environment control, in particular to a device for simulating and evaluating a coal dust suppression effect in a coal mining process.
Background
In recent years, the production scale of mines is continuously enlarged along with the remarkable improvement of the mechanization degree of coal mine production. While the yield and the benefit of coal are remarkably improved, the problem of a large amount of dust generated in mechanized production is already the key for threatening the operation and production safety and the life health of workers in a well. In order to improve the underground operation environment and ensure the production safety of mines, most of mines adopt different dust removal and ventilation measures and a series of dust removal means to treat dust according to actual conditions, and the measures mainly comprise ventilation dust removal, spray dust removal, chemical dust removal, foam dust removal, pre-wetting of coal bodies, individual protection and the like.
The ventilation and dust removal technology is used for ventilating the roadway in a long-pressure short-pumping mode and is matched with a dust removal system for dust removal; the spraying dust-settling technology is the most common dust-settling means for reducing the dust concentration of the mine at present, and water particles generated by spraying are utilized to quickly adsorb dust particles in the air to form effective dust control; the chemical dust removal technology is developed on the basis of spray dust removal, and a dust suppressant with a surface active substance is added into water for generating spray so as to improve the hydrophilicity and the wetting degree of dust particles and achieve a better dust removal effect; the foam dedusting technology uses high-pressure air to promote a foaming agent to generate gapless wet foam to cover a dust source, so that the dust which is just generated can be infiltrated, attached and deposited, the flying capability is lost, and the dust diffusion is fundamentally prevented; the pre-wetting of the coal body refers to that holes are punched in advance before coal mining, so that dust is restrained from being generated from the source, and in order to improve the infiltration wetting capacity of water, chemical reagents are usually added into the water; the individual protection is to filter the dust which can be inhaled in the air through dust-proof articles such as a dust mask, a dust mask and the like, and is the last line of defense for preventing dust harm of underground workers.
In coal mining, because coal seam components are different and mining modes and mining scales are different, different dust prevention and dust fall measures are needed in different mining operation environments under the condition that the dust prevention and dust fall effects are guaranteed and the economic requirements are met, and how to select a proper dust treatment means is always the subject of research by technicians in the field. For example, the test evaluation device disclosed in the invention patent of China and the method (application number CN 201510483050.4) for testing and evaluating the dust suppression rate of the unorganized dust suppressant can evaluate the dust suppression effect of different dust suppressants through simulation test, thereby guiding the selection of the dust suppressant on the coal mine site. However, the test evaluation device is only suitable for the simulation evaluation of spray dust fall in the chemical dust removal technology, and in fact, in coal mining, the various dust treatment measures are usually required to be matched, and a device capable of comprehensively evaluating the coal dust suppression effect is not available in the prior art.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a device for simulating and evaluating the coal dust suppression effect in the coal mining process, which can realize comprehensive evaluation of the coal dust suppression effect by simulating the coal dust environment in actual mining and simulating and contrastively analyzing the dust suppression effect under different dust suppression measures, particularly has guiding significance for the arrangement of a dust removal and suppression system and the design of a dust removal and suppression method in actual coal mining operation after coal bodies are pre-wetted and evaluating the suppression effect of dust generated by coal mining of a coal mining machine.
The purpose of the invention is realized by the following technical scheme:
a device for simulating and evaluating the coal dust suppression effect in the coal mining process comprises an axial flow fan and an experiment chamber, wherein the experiment chamber comprises an experiment chamber high-speed section, an experiment chamber low-speed section and an exhaust section which are sequentially communicated, the axial flow fan is communicated with the experiment chamber high-speed section through flexible connection, a wind direction adjusting device is arranged between the experiment chamber high-speed section and the experiment chamber low-speed section,
the high-speed section, the low-speed section and the exhaust section of the experiment chamber are respectively provided with a first smoke dust detection device, a second smoke dust detection device and a third smoke dust detection device;
a coal dust generating device is detachably arranged at the bottom in the low-speed section of the experiment chamber;
the dust suppression device is characterized by further comprising a spraying system, the spraying system comprises an air pressure air source, a solution blending device, a foaming device, a foam nozzle, a dust suppression agent nozzle and a water mist nozzle, the output end of the air pressure air source and the output end of the solution blending device are communicated to form a raw material input end, the raw material input end is communicated with the dust suppression agent nozzle, the water mist nozzle and the input end of the foaming device in a turn-off mode respectively, the output end of the foaming device is communicated with the foam nozzle, the dust suppression agent nozzle and the water mist nozzle are arranged above the coal dust generation device, and a dust removal sewage port is arranged below the coal dust generation device.
Further, the coal dust generating device comprises a barrel body, the barrel body is a cylindrical barrel with an open top, a plurality of dust through holes are formed in the side wall of the barrel body, a barrel cover is arranged at the open end of the barrel body, a motor is fixedly connected to the barrel cover, an output shaft of the motor penetrates through the barrel cover and a crushing shaft fixedly connected to the barrel cover, the crushing shaft is rotatably arranged in the barrel body, and a plurality of crushing blades are fixedly arranged on the circumferential surface of the crushing shaft.
Furthermore, the axial flow fan is a variable frequency fan with adjustable wind speed, and the motor is a variable frequency motor with adjustable rotating speed.
Furthermore, the experiment chamber is made of transparent materials, one side wall of the low-speed section of the experiment chamber can be opened, and a door handle is arranged on the openable side wall of the low-speed section of the experiment chamber.
Furthermore, the raw material input end is connected with the foam nozzle, the dust suppressant nozzle and the water mist nozzle through hoses.
The invention has the beneficial effects that:
the device for simulating and evaluating the coal dust suppression effect is provided with the axial flow fan and the experiment cabin, and can simulate different airflow environments and the environment of a ventilation and dust removal system in an actual mine; the coal dust generating device is arranged, so that the coal dust generating process in coal mining operation can be simulated; therefore, the coal dust environment in the actual mining process can be further simulated, and particularly the effect of inhibiting the coal dust from the source after the coal body is pre-wetted can be simulated and evaluated. The device sets up the spray system, and this spray system can be directed against coal dust or the different dust suppressant of dirt source blowout, water smoke and foam, through the simulation contrast, can directly carry out comprehensive analysis and evaluation to various dust removal and suppression modes, further is arranged in the instruction of dust removal and suppression system setting and dust removal and suppression worker method in the actual coal mine operation.
Drawings
FIG. 1 is a schematic diagram showing the overall structure of a device for simulating and evaluating the suppression effect of coal dust in the coal mining process according to the present invention;
fig. 2 is a schematic diagram of a disassembled structure of a coal dust generating device in the device for simulating and evaluating the coal dust suppression effect in the coal mining process.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
As shown in fig. 1 and 2, a device for simulating and evaluating the coal dust suppression effect in the coal mining process is an innovative simulation evaluation device applicable to the coal mining practice on the basis of the structure of the test evaluation device disclosed in the unorganized dust suppressant dust suppression rate test evaluation device and method (application number CN 201510483050.4) in the prior art. The structure mainly comprises an axial flow fan 10 and an experiment cabin. The experiment cabin comprises an experiment cabin high-speed section 20, an experiment cabin low-speed section 40 and an exhaust section 50 which are sequentially communicated, the axial flow fan 10 is communicated with the experiment cabin high-speed section 20 through flexible connection, and a wind direction adjusting device 30 is arranged between the experiment cabin high-speed section 20 and the experiment cabin low-speed section 40. The axial flow fan 10 is a variable frequency fan with adjustable wind speed, and can simulate the wind speeds of all levels in the environment. In this embodiment, the air volume generated by the axial flow fan 10 can also be used for simulating the air volume for tunnel ventilation in the ventilation and dust removal technology.
Different from the prior art, the first smoke detection device 61, the second smoke detection device 62 and the third smoke detection device 63 are respectively arranged on the high-speed section 20, the low-speed section 40 and the exhaust section 50 of the experiment chamber in the embodiment. The first smoke detection device 61, the second smoke detection device 62 and the third smoke detection device 63 are used for detecting the smoke situation in the corresponding experiment chamber part, and can be combined with a smoke sampling instrument, a low-voltage electric scale impactor, a smoke continuous analysis system and the like.
A coal dust generating device 80 is detachably arranged at the bottom in the low-speed section 40 of the experiment cabin and is used for simulating a dust source in coal mining. In practice, the coal dust generating device 80 includes a cylinder 81, the cylinder 81 is in a cylindrical shape with an open top, and a plurality of dust through holes 86 are formed on a side wall of the cylinder 81. The open end of barrel 81 is provided with cover 82, fixedly connected with motor 83 on cover 82, and the output shaft of motor 83 passes cover 82 and fixedly connected with crushing axle 84, and crushing axle 84 rotatable sets up in barrel 81, and the fixed a plurality of crushing blades 85 that are provided with on the global of crushing axle 84. When a coal dust source needs to be simulated, coal blocks are put into the cylinder body from the opening end of the cylinder body 81, the motor 83 is started, the output shaft of the motor drives the crushing shaft 84 to rotate, the crushing blade 85 is further driven to rotate, the coal blocks are cut and crushed, and the coal dust generated in the cutting process escapes through the dust through hole 86, so that the generation process of the coal dust in the coal mining process is simulated. Furthermore, the motor 83 is a variable frequency motor with adjustable rotating speed, and different coal dust generation conditions are simulated by adjusting the rotating speed. In specific implementation, the conditions of water mist spraying, dust suppressant spraying and foam spraying are involved in the experimental process, so that a shielding case is arranged outside the motor 83 to ensure the safe and stable operation of the motor 83. The experiment cabin is made of transparent materials, so that the coal dust condition in the experiment cabin can be visually observed conveniently. One side wall of the experiment chamber low-speed section 40 can be opened, and a door handle 42 is arranged on the openable side wall of the experiment chamber low-speed section 40, so that the coal dust generating device 80 in the experiment chamber can be conveniently detached and installed. Certainly, the sealing strip needs to be arranged at the position of the side door, so that the sealing effect is ensured when the side door is closed, and coal dust is prevented from escaping. And a sewage outlet 41 is also formed in the bottom of the low-speed section 40 of the experiment chamber and used for discharging the sewage after dust suppression by spraying.
A spraying agent system is also arranged at the top in the low-speed section 40 of the experiment chamber. The spraying agent system comprises an air pressure air source 71, a solution preparing device 72, a foaming device 73, a foam nozzle 74, a dust suppressant nozzle 75 and a water mist nozzle 76. The output end of the air pressure air source 71 is communicated with the output end of the solution preparation device 72 to form a raw material input end, the raw material input end is respectively communicated with the input ends of the dust suppressant spray head 75, the water mist spray head 76 and the foaming device 73 in a turn-off manner, the output end of the foaming device 73 is communicated with the foam spray head 74, and the foam spray head 74, the dust suppressant spray head 75 and the water mist spray head 76 are all arranged above the coal dust generating device 80. In implementation, the solution preparing device 72 is filled with water, different inhibitor solutions or different foam foaming raw materials according to requirements, and then water mist can be sprayed downwards through the water mist spray heads 76 respectively to simulate and evaluate the spraying dust-settling effect; different suppressors are sprayed downwards through the dust suppressant spray head 75 to simulate and evaluate the chemical dust removal effect; the foam is directly sprayed to the coal dust generating device 80 through the foam nozzle 74, and the foam dedusting effect is simulated and evaluated. Through simulation comparison, various dust removal and suppression modes can be directly analyzed and evaluated, and the method is further used for dust removal and suppression system setting and guidance of a dust removal and suppression construction method in actual coal mine operation.
When the device is used, the coal dust generation condition under natural conditions, the corresponding coal dust condition under high and low wind speeds and the condition when water mist or different dust suppressants directly act on the coal dust under various wind speeds can be simulated. In particular, the device can directly act water mist or different dust suppression agents or foams on a dust source, and more truly simulate the conditions of coal body pre-wetting (coal bed punching pre-wetting), spray suppression agents or foam dust suppression in the actual mine mining operation process.
When the coal dust generation condition is simulated, the coal blocks of the actual mining place can be selected as the experimental coal blocks so as to eliminate the condition that the coal dust is different due to different components and organizational structures of different coal blocks. During simulation, the coal dust generating device 80 is installed in the experiment chamber, the experiment coal is thrown into the cylinder 81, the motor 83 is started, the experiment coal is broken by the breaking blade 85, coal dust is generated in the experiment chamber from the dust through hole 86, and the second smoke detection device 62 tracks, monitors and records the coal dust generation condition. By changing the rotation speed of the motor 83, the amount of the generated soot can be changed. In the specific implementation, the on-site coal dust parameters under each working condition when no dust suppression measure is added under the actual mining condition are generally recorded, and during the simulation, the coal dust parameter values recorded by the second smoke detection device 62 are compared according to the coal dust parameters, so as to determine the rotating speed of the motor 83 corresponding to each on-site working condition. Accordingly, the effect of generating the dust by the dust generator 80 at the rotational speeds of the motors 83 obtained as described above realizes simulation of the dust parameters in the actual mining operation.
Under the condition of the simulated actual coal dust environment, water mist is sprayed to coal dust downwards through the water mist spray head 76, different inhibitors are sprayed to the coal dust downwards through the dust suppressant spray head 75, and dust fall effects of the mist, the inhibitors and the foam on the raised coal dust can be simulated respectively through the coal dust spraying foam downwards through the foam spray head 74, simulation results are monitored and recorded by the second smoke detection device 62 respectively, and the recorded data are compared with one another to obtain the optimal dust removal and fall mode applied to the reality. Certainly, fig. 1 is only a schematic structural diagram of the device, in specific implementation, a group of air pressure sources 71 and a solution blending device 72 may be used for simulating the above various dust removal modes, and then, multiple dust removal modes may be combined or multiple dust suppressants may be used in different layers (each nozzle is connected with a raw material input end through a hose, the setting position of the nozzle may be changed, and the height of the nozzle may be different), so as to obtain a better and more economical dust removal and suppression scheme through comparative analysis.
In the actual coal mining process, the common measures are not to remove dust from raised coal dust, but mainly to take dust suppression measures on the position of a dust source, and the common measures are to inject water, spray dust suppression agent or spray foam into a coal seam during mining. In this embodiment, the raw material input end is connected to the foam nozzle 74, the dust suppressant nozzle 75 and the water mist nozzle 76 through hoses, the positions of the nozzles can be adjusted as needed during simulation, and the nozzles are directly disposed near the coal dust generating device 80 and directly face the coal dust generating device during simulation evaluation of dust source removal. In addition, during actual mining, a treatment mode of spraying water to the coal seam is often adopted, soaking treatment is carried out for a period of time, when simulation is carried out on the condition, soaking treatment can also be carried out on the experimental coal blocks before the experimental coal blocks are added into the cylinder 81, and the second smoke detection device 62 is used for collecting coal dust data generated by the experimental coal blocks under different formulas of dust suppressant, so that a more preferable formula of the dust suppressant is obtained.
In addition, the airflow environment is also an important factor affecting coal dust during actual coal mining. Therefore, the invention combines the simulation device disclosed in the test and evaluation device and method (application number CN 201510483050.4) of the dust suppression rate of the unorganized dust suppressant in the prior art, so as to simulate the dust suppression effect of various dust suppression and dust removal modes under different wind speeds. On the one hand, the device can simulate the natural airflow environment of coal mining, and on the other hand the device can also simulate the ventilation environment in the ventilation dust removal system, and the simulation to the environmental parameter makes the result of this device simulation evaluation more closely to actual mining environment, especially in the mine that itself has the ventilation dust removal system, through simulation evaluation, can arrange the good preferred dust removal mode of effectual economic nature on its present ventilation dust removal system basis. Under different wind speeds, the simulation mode of different dust suppressants on the coal dust condition and the dust suppression effect is similar to the evaluation method disclosed in the prior art, and only the coal dust generating device 80 in the scheme is used for replacing the material falling port in the prior art, which is not described herein again. In the embodiment, the experiment chamber high speed section 20 is provided with a first smoke detection device 61, and the exhaust section 50 is provided with a third smoke detection device 63, so as to simulate the dust suppression of various dust suppression means in a ventilation dust removal system. During simulation, experimental coal dust can be arranged at the front end of the high-speed section 20 of the experimental cabin, and the dust at the position is monitored and data is recorded through the first smoke detection device 61, so that the incoming wind dust at different wind speeds can be simulated; the dusty airflow is uniformly adjusted by the wind direction adjusting device 30 and then enters the low-speed section 40 of the experiment chamber, at the moment, the simulation process is carried out in the low-speed section 40 of the experiment chamber, and the second smoke detection device 62 monitors and records data; the de-aired dust data is then detected and recorded by a third dust detection device 63 as the de-aired air stream passes through the exhaust section 50. Through the comparative analysis of the incoming wind dust data and the outgoing wind dust data, the preferable overall dust suppression scheme of the coal dust generation device 80 under different working conditions can be obtained.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. A device for simulating and evaluating the coal dust suppression effect in the coal mining process comprises an axial flow fan (10) and an experiment chamber, wherein the experiment chamber comprises an experiment chamber high-speed section (20), an experiment chamber low-speed section (40) and an exhaust section (50) which are sequentially communicated, the axial flow fan (10) is communicated with the experiment chamber high-speed section (20) through flexible connection, and a wind direction adjusting device (30) is arranged between the experiment chamber high-speed section (20) and the experiment chamber low-speed section (40),
a first smoke detection device (61), a second smoke detection device (62) and a third smoke detection device (63) are respectively arranged on the experiment cabin high-speed section (20), the experiment cabin low-speed section (40) and the exhaust section (50);
a coal dust generating device (80) is detachably arranged at the bottom in the low-speed section (40) of the experiment chamber;
the coal dust suppression device is characterized by further comprising a spraying system, the spraying system comprises an air pressure air source (71), a solution preparing device (72), a foaming device (73), a foam spray head (74), a dust suppressant spray head (75) and a water mist spray head (76), the output end of the air pressure air source (71) is communicated with the output end of the solution preparing device (72) to form a raw material input end, the raw material input end is communicated with the input ends of the dust suppressant spray head (75), the water mist spray head (76) and the foaming device (73) in a turn-off mode, the output end of the foaming device (73) is communicated with the foam spray head (74), and the foam spray head (74), the dust suppressant spray head (75) and the water mist spray head (76) are all arranged above the coal dust generating device (80).
2. The device for simulating and evaluating the coal dust suppression effect in the coal mining process according to claim 1, wherein the coal dust generating device (80) comprises a cylinder body (81), the cylinder body (81) is in a cylindrical shape with an open top, a plurality of dust through holes (86) are formed in the side wall of the cylinder body (81), a cylinder cover (82) is arranged at the open end of the cylinder body (81), a motor (83) is fixedly connected to the cylinder cover (82), an output shaft of the motor (83) penetrates through the cylinder cover (82) and is fixedly connected with a crushing shaft (84), the crushing shaft (84) is rotatably arranged in the cylinder body (81), and a plurality of crushing blades (85) are fixedly arranged on the peripheral surface of the crushing shaft (84).
3. The device for simulating and evaluating the coal dust suppression effect in the coal mining process according to claim 2, wherein the axial flow fan (10) is a variable frequency fan with adjustable wind speed, and the motor (83) is a variable frequency motor with adjustable rotating speed.
4. The device for simulating and evaluating the coal dust suppression effect in the coal mining process according to claim 3, wherein the experiment chamber is made of transparent material, one side wall of the experiment chamber low-speed section (40) can be opened, and a door handle (42) is arranged on the openable side wall of the experiment chamber low-speed section (40).
5. The device for simulating and evaluating the effect of coal dust suppression in a coal mining process according to claim 1, wherein the raw material input end is connected with the foam nozzle (74), the dust suppressant nozzle (75) and the water mist nozzle (76) through hoses.
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| CN202010314011.2A CN111323354A (en) | 2020-04-20 | 2020-04-20 | Device for simulating and evaluating coal dust suppression effect in coal mining process |
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| CN112666337A (en) * | 2020-12-15 | 2021-04-16 | 广东电网有限责任公司电力科学研究院 | Device and method for evaluating effect of inhibiting physical loss of coal yard |
| CN112683727A (en) * | 2020-12-09 | 2021-04-20 | 西安科技大学 | Experimental device for simulation colliery working face coal body desorption |
| CN113804391A (en) * | 2021-06-04 | 2021-12-17 | 中国神华能源股份有限公司哈尔乌素露天煤矿研究院 | Development method of simulated strip mine road dust suppressant based on raise dust control test |
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| CN112546772A (en) * | 2020-11-27 | 2021-03-26 | 西南科技大学 | Dust removal bubble generator and dust removal method thereof |
| CN112546772B (en) * | 2020-11-27 | 2022-07-08 | 西南科技大学 | Dust removal bubble generator and dust removal method thereof |
| CN112683727A (en) * | 2020-12-09 | 2021-04-20 | 西安科技大学 | Experimental device for simulation colliery working face coal body desorption |
| CN112666337A (en) * | 2020-12-15 | 2021-04-16 | 广东电网有限责任公司电力科学研究院 | Device and method for evaluating effect of inhibiting physical loss of coal yard |
| CN113804391A (en) * | 2021-06-04 | 2021-12-17 | 中国神华能源股份有限公司哈尔乌素露天煤矿研究院 | Development method of simulated strip mine road dust suppressant based on raise dust control test |
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