CN110687149A - Underground coal field fire area typical product dynamic precipitation and release simulation experiment system - Google Patents
Underground coal field fire area typical product dynamic precipitation and release simulation experiment system Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 81
- 238000004088 simulation Methods 0.000 title claims abstract description 14
- 238000001556 precipitation Methods 0.000 title claims abstract description 11
- 238000009423 ventilation Methods 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 238000012360 testing method Methods 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000011161 development Methods 0.000 claims abstract description 11
- 238000002474 experimental method Methods 0.000 claims abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000001301 oxygen Substances 0.000 claims abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 6
- 239000011241 protective layer Substances 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 21
- 239000011435 rock Substances 0.000 claims description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 10
- 239000003546 flue gas Substances 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 238000013508 migration Methods 0.000 claims description 9
- 230000005012 migration Effects 0.000 claims description 9
- 239000000523 sample Substances 0.000 claims description 9
- 239000000779 smoke Substances 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 238000004876 x-ray fluorescence Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 4
- 239000002689 soil Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims 3
- 238000005094 computer simulation Methods 0.000 claims 1
- 238000002329 infrared spectrum Methods 0.000 claims 1
- 230000009466 transformation Effects 0.000 claims 1
- 230000002265 prevention Effects 0.000 abstract description 4
- 230000018109 developmental process Effects 0.000 description 9
- 238000009413 insulation Methods 0.000 description 8
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 4
- 238000004453 electron probe microanalysis Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
- G01N23/225—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material using electron or ion
- G01N23/2251—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material using electron or ion using incident electron beams, e.g. scanning electron microscopy [SEM]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N23/2251—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material using electron or ion using incident electron beams, e.g. scanning electron microscopy [SEM]
- G01N23/2252—Measuring emitted X-rays, e.g. electron probe microanalysis [EPMA]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
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Abstract
The invention discloses a simulation experiment system for dynamic precipitation and release of typical products in an underground coal field fire area, wherein the simulation experiment device for the dynamic products in the underground coal field fire area is divided into a crack-containing coal seam geological module, a ventilation module, a fire area temperature testing module and a product detection module according to the experiment principle, each module is arranged in an external protective layer, the ventilation module is used for introducing hot air flow and proper oxygen into the fractured coal seam geological module which is designed for air leakage fracture in advance by adding an air inlet lane of a heating zone, the coal seam geological module containing the cracks is connected with the product detection module through the return airway, and the simulation experiment system for analyzing the characteristics of the evolution products of the coal field fire zone is constructed, so that the understanding of the development law of the coal fire is deepened, theoretical support is provided for making fire prevention and extinguishing measures in a targeted manner, and the method has very important significance for coal fire control, disaster prevention and control and the like.
Description
Technical Field
The invention relates to the field of detection of underground coal fire products, in particular to a simulation experiment system for dynamic precipitation and release of typical products in an underground coal field fire area.
Background
The underground coal fire is a coal spontaneous combustion phenomenon that the underground broken coal body generates coal oxygen recombination action to form combustion of a certain scale and can influence the environment. China is the most serious country of coal fire in the world, and coal field fire not only burns a large amount of coal resources to influence coal field development, but also generates a large amount of toxic and harmful substances to pollute the environment and destroy the ecology. The existing treatment work aiming at underground coal fire mainly focuses on engineering, research work is mainly focused on remote sensing detection and environment monitoring of fire areas, special research aiming at space characteristics of existence and development of underground coal fire is lacked, so that the research on the generation and development mechanism of underground coal fire is still very weak, and the research on basic theory is insufficient, so that people cannot accurately explain the generation and disaster-causing mechanism of underground coal fire so far, the combustion position and the state of underground coal fire cannot be accurately defined, the treatment method is single, and the treatment process is lack of effective management and control, so that the high-efficiency treatment of large-area underground coal fire is difficult to realize, the treatment work of fire areas faces very severe situations all the time, and the treatment speed of some fire areas is even obviously lagged behind the development speed of new fire areas.
The invention constructs a simulation experiment system for analyzing the characteristics of evolution products of the coal field fire area, is beneficial to deepening understanding of the development law of the coal fire, provides theoretical support for making fire prevention and extinguishing measures in a targeted manner, and has very important significance for coal fire control, disaster prevention and control and the like.
Disclosure of Invention
In order to solve the technical problems, the technical scheme provided by the invention is as follows: the utility model provides a release simulation experiment system is appeared in developments of typical result in underground coal field fire district, underground coal field fire district result developments simulation experiment device is divided into including crack coal seam geology module, ventilation module, fire district temperature test module, result detection module according to experimental principle, and each module sets up in the outside protective layer, ventilation module lets in hot gas flow and suitable oxygen for including crack coal seam geology module that carries out the crack design of leaking out in advance through the air inlet lane that increases the heating zone, ventilation module includes the ventilation blower, the ventilation blower sets gradually three-way valve, flowmeter along the export pipeline, and the air inlet is passed through the air inlet lane that is equipped with the heating zone and is linked together with crack coal seam module one end, include crack geology module other end and product detection module and be connected through the return air lane, product detection module is equipped with scanning electron microscope SEM, SEM that establish ties in proper order, The device comprises an electronic probe EPMA, an X-ray fluorescence spectrometer XRF and a Fourier infrared spectrometer FTIR, wherein the fire zone temperature testing module comprises a temperature acquisition unit and temperature measuring points electrically connected with the temperature acquisition unit, and the temperature measuring points are formed by 20 thermocouples which are arranged closely and uniformly and are used for monitoring the change rule of a temperature field and detecting and monitoring the real-time distribution condition of the temperature in an experimental system.
As an improvement, the fractured coal seam geological module is provided with a double-layer box body with separating fins, and the fractured coal seam geological module comprises an external heat insulation layer, an internal steel layer and the separating fins extending out of the surface of the internal steel layer, the separating fins are favorable for internal heat dissipation, a heat insulation preheating space is formed between the external heat insulation layer and the internal steel layer, inlet air can be preheated, and interference of room-temperature inlet air flow on an experiment is greatly reduced.
As an improvement, the product detection module is provided with a flue gas analyzer at the return air position for analyzing the components and the concentration of the flue gas of the coal fire, and parameters such as the microstructure, the mineral components, the content of characteristic elements and the like of the rock sample in the fire area are measured through a scanning electron microscope SEM, an electron probe EPMA, an X-ray fluorescence spectrometer XRF and a Fourier infrared spectrometer FTIR.
As an improvement, the implementation method specifically comprises the following steps:
(1) and designing a pre-air-leakage gap of the fractured coal seam geological module, and dividing the module into a coal seam, a rock stratum and a soil layer according to the actual condition of the simulated coal fire area.
(2) The heating belt and the ventilation module are used for ensuring the stable hot air flow supply in the experimental coal field fire area;
(3) stopping the heating belt and reasonably adjusting ventilation parameters of the ventilator, observing the development and evolution process of coal fire, detecting the temperature and the smoke component concentration of a fire zone through a fire zone temperature testing module, analyzing the smoke migration rate and the influence range according to the change characteristics of a temperature field, and describing the flow characteristics of smoke in the cracks of the overburden burning metamorphic rock holes;
(4) flue gas is collected through a return air pipe, rock samples at different positions are selected, parameters such as temperature, components and content of the rock samples are measured, conversion rules of forms given by characteristic elements in the migration and cooling processes are analyzed, and migration characteristics of products in a fire area under the action of combustion power are efficiently and quickly disclosed.
Compared with the prior art, the coal field fire area is divided into the fracture-containing coal seam geological module, the ventilation module, the fire area temperature testing module and the product detection module, the fracture-containing coal seam geological module is designed with air leakage fractures in advance, the air leakage fractures mainly comprise three geological layers, namely a coal seam, a rock stratum and a soil layer, and the designed air leakage fractures well simulate the existing environment of underground coal fire in the actual situation; the main purpose of ventilation module is for the experiment simulation coal fire takes place to provide stable hot air current, utilize the ventilation blower to provide the required oxygen of coal fire burning when necessary, utilize the three-way valve to stabilize the air current, and use glass rotameter monitoring air current flow, it flows at stable within range to ensure the air current among the experimental system, utilize multiple detection analysis equipment, the combination forms the device of analysis result, its microcosmic constitution of more accurate efficient analysis, reduce the condition of a fire and stretch and control the condition of a fire after the condition of a fire takes place for secret coal fire, theoretical experimental basis is provided, and the practical value is good.
Drawings
FIG. 1 is a front view of a typical dynamic precipitation and release simulation experiment system for a coal field fire zone according to the present invention.
FIG. 2 is a schematic structural plan view of a typical product dynamic precipitation and release simulation experiment system in a coal field fire zone.
As shown in fig. 1-2: 1. the device comprises a fractured coal seam geological module 2, a ventilation module 201, a ventilator 202, a three-way valve 203, a flowmeter 204, inlet air 205, a return air pipe 206, a heating zone 207, an air inlet roadway 3, a fire zone temperature testing module 301, a temperature acquisition unit 302, a temperature measuring point 4, a product detection module 401, a flue gas analyzer 5, an external heat insulation layer 6, a fin isolation 7, an internal steel layer 8 and a heat insulation preheating space.
Detailed Description
With reference to the attached drawings 1-2, a simulation experiment system for dynamic precipitation and release of typical products in an underground coal field fire area is divided into a fractured coal seam geological module 1, a ventilation module 2, a fire area temperature testing module 3 and a product detection module 4 according to experiment principles, wherein the modules are arranged in an external protective layer, the ventilation module 2 is used for introducing hot air and proper oxygen into the fractured coal seam geological module 1 which is designed for air leakage fracture in advance through adding an air inlet lane 207 of a heating zone 206, the ventilation module 2 comprises a ventilator 201, the ventilator 201 is sequentially provided with a three-way valve 202 and a flowmeter 203 along an outlet pipeline, the air inlet 204 is communicated with one end of the fractured coal seam geological module 1 through the air inlet lane 207 provided with the heating zone 206, the other end of the fractured coal seam geological module 1 is connected with the product detection module 4 through the air inlet lane, the product detection module 4 is provided with a scanning electron microscope SEM, an electron probe EPMA, an X-ray fluorescence spectrometer XRF and a Fourier infrared spectrometer FTIR which are sequentially connected in series, the fire zone temperature test module 3 comprises a temperature acquisition unit 301 and temperature test points 302 electrically connected with the temperature acquisition unit 301, and the temperature test points 302 are formed by 20 thermocouples which are arranged closely and uniformly and used for monitoring the temperature field change rule and detecting the real-time distribution condition of the temperature in the monitoring experiment system.
As a preferred embodiment of the present embodiment, the fractured coal seam geological module 1 is provided with a double-layer box body with separating fins 6, and comprises an external heat insulation layer 5, an internal steel layer 7 and separating fins 6 extending from the surface of the internal steel layer, the separating fins 6 are favorable for internal heat dissipation, and a heat insulation preheating space 8 is formed between the external heat insulation layer 5 and the internal steel layer 7, so that the inlet air 204 can be preheated, and the interference of room-temperature inlet air to the experiment is greatly reduced.
As a preferred embodiment of this embodiment, the product detection module 4 is provided with a flue gas analyzer 401 at the return air for analyzing the flue gas components and concentrations of the coal fire, and measuring parameters such as the microstructure, mineral components and characteristic element content of the rock sample in the fire area by scanning electron microscope SEM, electron probe EPMA, X-ray fluorescence spectrometer XRF and fourier infrared spectrometer FTIR.
As a preferred embodiment of this embodiment, the implementation method specifically includes the following steps:
(1) and designing a pre-air-leakage gap of the fractured coal seam geological module 1, and dividing the module into a coal seam, a rock stratum and a soil layer according to the actual condition of the simulated coal fire area.
(2) The heating belt 206 and the ventilation module 2 are used for ensuring the stable hot air flow supply in the experimental coal field fire area;
(3) stopping the heating belt 2 and reasonably adjusting ventilation parameters of the ventilator 201, observing the development and evolution process of coal fire, detecting the temperature and the smoke component concentration of a fire zone through the fire zone temperature testing module 3, analyzing the smoke migration rate and the influence range according to the temperature field change characteristics, and describing the flow characteristics of smoke in the cracks of the overburden burning rock-changing holes;
(4) flue gas is collected through the return air pipe 205, rock samples at different positions are selected, parameters such as temperature, components and content of the rock samples are measured, the conversion rule of the form given by characteristic elements in the migration and cooling process is analyzed, and the migration characteristics of products in a fire area under the action of combustion power are efficiently and quickly disclosed.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. A simulation experiment system for dynamic precipitation (release) of typical products in a fire zone of an underground coal field is characterized in that: the dynamic simulation experiment device for the underground coal field fire zone products is divided into a fissure-containing coal bed geological module (1), a ventilation module (2), a fire zone temperature test module (3) and a product detection module (4) according to an experiment principle, wherein each module is arranged in an external protective layer, the ventilation module (2) is provided with an air inlet roadway (207) additionally provided with a heating zone (206), hot air and proper oxygen are introduced into the fissure-containing coal bed geological module (1) designed for air leakage cracks in advance, the ventilation module (2) comprises a ventilator (201), the ventilator (201) is sequentially provided with a three-way valve (202) and a flowmeter (203) along an outlet pipeline, an air inlet (204) is communicated with one end of the fissure-containing coal bed geological module (1) through the air inlet roadway provided with the heating zone (206), the other end of the fissure-containing coal bed geological module (1) is connected with the product detection module (4), the product detection module (4) is provided with a Scanning Electron Microscope (SEM), an Electronic Probe (EPMA), an X-ray fluorescence spectrometer (XRF) and a Fourier infrared spectrometer (FTIR) which are sequentially connected in series, the fire zone temperature test module (3) comprises a temperature acquisition unit (301) and temperature test points (302) which are electrically connected with the temperature acquisition unit (301), and the temperature test points (302) are formed by 20 thermocouples which are arranged closely and uniformly and are used for monitoring the temperature field change rule and detecting the real-time distribution condition of the temperature in the monitoring experiment system.
2. The system for simulating the dynamic precipitation of typical products in the fire zone of the underground coal field according to claim 1, wherein: contain fracture coal seam geology module (1) and be equipped with the double-deck box that has and separate wing (6), including outside heat preservation (5), inside steel layer (7) and the wing (6) constitution that separate that its surface stretches out, it is favorable to inside heat dissipation to separate wing (6), form heat preservation preheating space (8) between outside heat preservation (5) and inside steel layer (7), can preheat air inlet (204), greatly reduce the interference of room temperature air inlet to the experiment.
3. The system for simulating the dynamic precipitation of typical products in the fire zone of the underground coal field according to claim 1, wherein: the product detection module (4) is provided with a flue gas analyzer (401) at the return air position for analyzing the flue gas components and the concentration of coal fire, and parameters such as the microstructure of a rock sample in a fire area, mineral components and the content of characteristic elements are measured through a Scanning Electron Microscope (SEM), an Electronic Probe (EPMA), an X-ray fluorescence spectrometer (XRF) and a Fourier infrared spectrum analyzer (FTIR).
4. The system for simulating the dynamic precipitation of typical products in the fire zone of the underground coal field according to claim 1, wherein: the implementation method comprises the following steps:
(1) designing a pre-air-leakage gap of a fracture-containing coal seam geological module (1), and dividing the module into a coal seam, a rock stratum and a soil layer according to the actual condition of a simulated coal fire area;
(2) the heating belt (206) and the ventilation module (2) are used for ensuring the stable hot air flow supply in the experimental coal field fire area;
(3) stopping the heating belt (2) from working, reasonably adjusting ventilation parameters of a ventilator (201), observing the development and evolution process of coal fire, detecting the temperature and the smoke component concentration of a fire zone through a fire zone temperature testing module (3), analyzing the smoke migration rate and the influence range according to the change characteristics of a temperature field, and describing the flow characteristics of smoke in the overburning rock-changing hole cracks;
(4) flue gas is collected through a return air pipe (205), rock samples at different positions are selected, parameters such as temperature, components and content of the rock samples are measured, the transformation rule of the form given by characteristic elements in the migration and cooling process is analyzed, and the migration characteristic of products in a fire area under the action of combustion power is efficiently and quickly disclosed.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112881656A (en) * | 2021-03-02 | 2021-06-01 | 中国建筑西南勘察设计研究院有限公司 | Method for testing corrosion rate and crack connectivity of concealed soluble rock |
| CN114295813A (en) * | 2022-03-09 | 2022-04-08 | 中国矿业大学(北京) | Device and method for synchronously monitoring gas flux in multiple areas of coal field fire area |
| CN114324826A (en) * | 2022-03-09 | 2022-04-12 | 中国矿业大学(北京) | Monitoring system and monitoring method for air-soil vertical gas flux in coal field fire area |
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