CN105954459B - The device that a kind of detection coal mine gob gas pumping influences on coal spontaneous combustion - Google Patents
The device that a kind of detection coal mine gob gas pumping influences on coal spontaneous combustion Download PDFInfo
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- CN105954459B CN105954459B CN201610270069.5A CN201610270069A CN105954459B CN 105954459 B CN105954459 B CN 105954459B CN 201610270069 A CN201610270069 A CN 201610270069A CN 105954459 B CN105954459 B CN 105954459B
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
- G01N25/22—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures
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Abstract
The invention belongs to coal seam spontaneous combustion technical field, particularly relate to the device that a kind of detection coal mine gob gas pumping influences on coal spontaneous combustion, primarily to providing the detection verifying attachment that a kind of coal mine gob gas pumping influences on spontaneous combustion of remaining coal, it is experimental study under different gas pumping amounts, temperature in the oxidation heating process of Residual coal in goaf, air pressure, the change of internal space blast, the device influenceed there is provided a kind of detection coal mine gob gas pumping on coal spontaneous combustion, including thermal-insulating body, the lower floor of thermal-insulating body is provided with coal sample reative cell, the upper strata of thermal-insulating body is provided with negative pressure chamber, crack simulation region is provided between coal sample reative cell and negative pressure chamber, it is provided with negative pressure chamber and flows cavity, stream cavity is directly connected with outside air exhauster, monitoring section is additionally provided with inside thermal-insulating body, the present invention passes through fixed extraction negative pressure operating mode, monitor the flow and negative pressure variation of airway tube in spontaneous combustion generating process.
Description
Technical field
The invention belongs to coal seam spontaneous combustion technical field；A kind of detection coal mine gob gas is particularly related to take out
Adopt the device influenceed on coal spontaneous combustion.
Background technology
Highly gassy mine and spontaneous fire seam are two big threats during Safety of Coal Mine Production, easy especially for high methane
The mine of spontaneous combustion, while gas pumping mitigation harm is carried out, existing gas pumping technology can aggravate goaf air leaking, enter
And spontaneous combustion of remaining coal is caused, goaf gas extraction technology is widely applied in China, under the conditions of negative pressure extraction, is leaked out
Aggravation will certainly produce to Residual coal in goaf aoxidize heating disturbance effect, therefore, by specific analogue means, in difference
Negative pressure extraction under the conditions of, expansion goaf air leaking power and spontaneous combustion of remaining coal characteristic research, find rational goaf gas
Extraction condition, is prevented and treated coordinating gas control and coal spontaneous combustion, ensure Safety of Coal Mine Production everything goes well with your work carry out it is significant.
The content of the invention
The goal of the invention of the present invention：
Primarily to providing the detection verifying attachment that a kind of coal mine gob gas pumping influences on spontaneous combustion of remaining coal, it is
Experimental study is under different gas pumping amounts, temperature, air pressure, internal space wind in the oxidation heating process of Residual coal in goaf
The change of pressure, and by comparative analysis, judge disturbance effect of the gas pumping amount to spontaneous combustion of remaining coal.
The technical scheme is that：
The device influenceed there is provided a kind of detection coal mine gob gas pumping on coal spontaneous combustion, including thermal-insulating body, are being protected
The lower floor of incubator body is provided with coal sample reative cell, and the upper strata of thermal-insulating body is provided with negative pressure chamber, in coal sample reative cell and negative pressure
Crack simulation region is provided between room, is provided with negative pressure chamber and flows cavity, air exhauster phase of the cavity directly with outside is flowed
Connection, is also being disposed with gas flowmeter, flow control valve and U-shaped water column meter, U-shaped water between stream cavity and air exhauster
Post meter is also directly connected with Pitot tube, is additionally provided with inside thermal-insulating body in monitoring section, monitoring section and is provided with monitoring
Point, monitoring point is directly connected with outside gas chromatograph, and electrically heated rod is additionally provided with coal sample reative cell, its directly with outside
The temperature controller in portion is connected, and temperature controller and gas chromatograph are directly connected with analysis main frame.
Heat-preserving cover plate is provided with the top of thermal-insulating body, and the height of thermal-insulating body is 1.6 meters.
The bottom of thermal-insulating body is provided with steel construction screen skeleton, the bottom of steel construction screen skeleton is provided with I-shaped
Steel.
Described monitoring section is arranged in the crack simulation region and coal sample reative cell inside thermal-insulating body, and from top to down
Spaced set, the number of monitoring section is set to five.
Coal sample reative cell in thermal-insulating body is provided with loose coal, and rubble is provided with the simulation region of crack.
Described stream cavity is made up of orifice plate and inclined guide plate.
Electrically heated rod in described coal sample reative cell is equally distributed four.
Temperature sensor is provided with the monitoring point of monitoring section.
The beneficial effects of the invention are as follows：
By the experimental rig can monitor in real time temperature in the spontaneous combustion of remaining coal oxidizing process of coal mine gob, gas componant and
Leaked out inside the change of gas relative pressure, identification goaf and the three-dimensional distribution characteristics of spontaneous combustion；Pass through different extraction conditions simultaneously
Lower coal sample oxidation heating process analysis, obtains the critical extraction of spontaneous combustion and leaks out speed, and then determine safety gas extraction amount；In addition,
By fixed extraction negative pressure operating mode, the flow and negative pressure variation of airway tube in spontaneous combustion generating process are monitored, self-heating loose coal is determined
Internal thermal air pressure effect.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is the structural representation of the thermal-insulating body of the present invention.
In figure；1 is thermal-insulating body；2 be coal sample reative cell；3 be crack simulation region；4 be negative pressure chamber；5 be to flow cavity；6
For air exhauster；7 be gas flowmeter；8 be U-shaped water column meter；9 be flow control valve；10 be Pitot tube；11 be monitoring section；12
For monitoring point；13 be gas chromatograph；14 be electrically heated rod；15 be temperature controller；16 be analysis main frame；17 be insulation cover
Plate；18 be screen skeleton；19 be I-steel；20 be rubble；21 be orifice plate；22 be guide plate；23 be temperature sensor.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.
There is provided the device that a kind of detection coal mine gob gas pumping influences on coal spontaneous combustion as shown in Fig. 1~2, including
Thermal-insulating body 1, coal sample reative cell 2 is provided with the lower floor of thermal-insulating body 1, and the upper strata of thermal-insulating body is provided with negative pressure chamber 4,
Crack simulation region 3 is provided between coal sample reative cell and negative pressure chamber, stream cavity 5 is provided with negative pressure chamber 4, cavity 5 is flowed
Directly it is connected with outside air exhauster 6, gas flowmeter 7, stream is also being disposed between stream cavity 5 and air exhauster 6
Adjustable valve 9 and U-shaped water column meter 8, U-shaped water column meter 8 are also directly connected with Pitot tube 10, are additionally provided with inside thermal-insulating body
Monitoring point 12 is provided with monitoring section 11, monitoring section 11, monitoring point 12 is directly connected with outside gas chromatograph 13,
Electrically heated rod 14 is additionally provided with coal sample reative cell, it is directly connected with outside temperature controller 15, temperature controller 15
Directly it is connected with gas chromatograph 13 with analysis main frame 16.
Heat-preserving cover plate 17 is provided with the top of thermal-insulating body 1, and the height of thermal-insulating body is 1.6 meters；In thermal-insulating body
The heat-preserving cover plate that top is set is handled using embedded water seal, effectively ensure that sealing of the device in process of the test
Can, and in order to verify coal sample during low-temperature oxidation, due to thermograde in coal sample solid space and gas density it
Between have differences, in order to verify the pressure change caused by the difference, so the height of the thermal-insulating body of the experimental rig is set
It is set to 1.6 meters.
The bottom of thermal-insulating body is provided with steel construction screen skeleton 18, the bottom of steel construction screen skeleton is provided with work
Word steel 19；By setting screen skeleton so that thermal-insulating body bottom has certain bearing strength, bottom with I-steel hold up with
The distinguished and admirable pressure that ensures to leak out is distributed in coal body space.
Described monitoring section is arranged in the crack simulation region 3 and coal sample reative cell 2 inside thermal-insulating body, and from upper and
Lower spaced set, the number of monitoring section 11 is set to five；Monitoring may be such that using the monitoring section of the spaced set
Sampling process is more uniform reasonable.
Coal sample reative cell 2 in thermal-insulating body 1 is provided with loose coal, and rubble 20 is provided with crack simulation region 3.
Described stream cavity 5 is made up of orifice plate 21 and inclined guide plate 22；Be provided with the guide plate at certain inclination angle, with up to
To the uniform purpose of extraction suction function so that the air that leaks out is final to concentrate uniformly through coal sample reative cell and crack simulation region
Discharge.
Electrically heated rod 14 in described coal sample reative cell 2 is equally distributed four；Electrically heated rod and temperature controller
It is connected, can in real time and uniformly carries out the heating process of experimental rig, to control coal body heat temperature raising gradient in time.
Temperature sensor is provided with the monitoring point of monitoring section；The data that the monitoring point is monitored are passed by temperature
Sensor and gas sample collecting device for air, by pipeline and gas chromatograph, are connected with host analysis unit, can be to inspection in monitoring process
Gaging hole is intraoral to be put into airway tube, connects U-shaped water column meter, it is possible to achieve the observation of the air pressure change process of difference detection section.
The cardinal principle of coal body goaf detection experimental rig is to pass through top by simulating rubble in the simulation region of crack
The change situation of the compaction of rubble in itself formed by the change of the intensity of pressure of negative pressure chamber, simulates goaf top overlying strata
The channel form that leaks out, in real time monitoring spontaneous combustion in goaf oxidizing process in temperature, gas componant, gas relative pressure become
Change, leaked out inside identification goaf and the three-dimensional distribution characteristics of spontaneous combustion；Simultaneously by under the conditions of different extractions coal sample oxidation heat up into
Journey is analyzed, and is obtained the critical extraction of spontaneous combustion and is leaked out speed, and then determines safety gas extraction amount；In addition, passing through fixed extraction negative pressure
The flow and negative pressure variation of airway tube, determine the thermal air pressure effect in self-heating loose media in operating mode, monitoring spontaneous combustion generating process.
The testing process of the experiment detection device is：
Temperature sensor 23 and gas chromatograph 13 are corrected before experiment starts, after correction is finished, by coal sample
Natural packing is in coal sample reative cell 2, by the sleeve pipe containing temperature sensor and gas sample collecting device for air in coal sample banking process
It is fixed, while the position of adjustment and fixed heating rod 14, then fills rubble, rubble granularity is from bottom to top in crack simulation region 3
Gradually increase, equally fix the sleeve pipe of monitoring section in filling process；Cover after heat-preserving cover plate 17, open exhaust ventilation machine
6, Pitot tube 10 and U-shaped water column meter 8 are connected, and experiment condition point is adjusted according to gas flowmeter 7 and gas flow control valve 9,
When carrying out pressure measurement by Pitot tube and U-shaped water column meter, Pitot tube is inserted in air duct first, just to wind direction, detected
Pitot tube, is then connected on U-shaped water column meter and detects moving in the air duct by U-shaped water column meter by the static pressure difference inside airduct
Pressure difference, the distinguished and admirable relative total head is equal to the algebraical sum of static pressure difference and dynamic pressure difference, so as to provide corresponding hair wind for experiment
Press data.
Then electrically heated rod 14 and temperature sensor 23 are connected with temperature controller 15, after experiment condition point is stable,
Heating-up temperature is set on temperature controller 15.Host analysis unit is to analyze the heating process that the start recording of main frame 16 analyzes coal
Change with the gas componant collected by gas chromatograph 13, put in test process by the detection aperture opened up into detection section
Enter airway tube, connect the gas pressure change that U-shaped water column meter records different section, the spontaneous combustion for observing coal under different extraction amounts is special
Property；After coal body rises to certain temperature, stop heating rod 14 and heat, due to unbalanced temperature place forming inside checking coal body
The power that leaks out.
The present invention can monitor temperature, gas componant and gas phase pair in the spontaneous combustion of remaining coal oxidizing process of coal mine gob in real time
Leaked out inside the change of pressure, identification goaf and the three-dimensional distribution characteristics of spontaneous combustion；Pass through coal sample oxygen under the conditions of different extractions simultaneously
Change heating process analysis, obtain the critical extraction of spontaneous combustion and leak out speed, and then determine safety gas extraction amount；In addition, passing through fixation
The flow and negative pressure variation of airway tube, determine the heat in self-heating loose coal in extraction negative pressure operating mode, monitoring spontaneous combustion generating process
Blast effect.
Claims (8)
1. the device that a kind of detection coal mine gob gas pumping influences on coal spontaneous combustion, including thermal-insulating body, it is characterised in that：
The lower floor of thermal-insulating body is provided with coal sample reative cell, and the upper strata of thermal-insulating body is provided with negative pressure chamber, in coal sample reative cell and negative
Crack simulation region is provided between pressure chamber, is provided with negative pressure chamber and flows cavity, air exhauster of the cavity directly with outside is flowed
It is connected, is also being disposed with gas flowmeter, flow control valve and U-shaped water column meter between stream cavity and air exhauster, it is U-shaped
Water column meter is also directly connected with Pitot tube, is additionally provided with inside thermal-insulating body in monitoring section, monitoring section and is provided with prison
Measuring point, monitoring point is directly connected with outside gas chromatograph, and electrically heated rod is additionally provided with coal sample reative cell, its directly with
Outside temperature controller is connected, and temperature controller and gas chromatograph are directly connected with analysis main frame.
2. the device that a kind of detection coal mine gob gas pumping according to claim 1 influences on coal spontaneous combustion, its feature
It is：The top of thermal-insulating body is provided with heat-preserving cover plate, handled using water seal.
3. the device that a kind of detection coal mine gob gas pumping according to claim 1 influences on coal spontaneous combustion, its feature
It is：The bottom of thermal-insulating body is provided with steel construction screen skeleton, the bottom of steel construction screen skeleton is provided with I-steel.
4. the device that a kind of detection coal mine gob gas pumping according to claim 1 influences on coal spontaneous combustion, its feature
It is：Described monitoring section is arranged in the crack simulation region and coal sample reative cell inside thermal-insulating body, and from top to down etc.
Spacing is set, and the number of monitoring section is set to five.
5. the device that a kind of detection coal mine gob gas pumping according to claim 1 influences on coal spontaneous combustion, its feature
It is：Coal sample reative cell in thermal-insulating body is provided with loose coal, and rubble is provided with the simulation region of crack.
6. the device that a kind of detection coal mine gob gas pumping according to claim 1 influences on coal spontaneous combustion, its feature
It is：Described stream cavity is made up of orifice plate and inclined guide plate.
7. the device that a kind of detection coal mine gob gas pumping according to claim 1 influences on coal spontaneous combustion, its feature
It is：Electrically heated rod in described coal sample reative cell is equally distributed four.
8. the device that a kind of detection coal mine gob gas pumping according to claim 1 influences on coal spontaneous combustion, its feature
It is：Temperature sensor is provided with the monitoring point of monitoring section.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610270069.5A CN105954459B (en) | 2016-04-27 | 2016-04-27 | The device that a kind of detection coal mine gob gas pumping influences on coal spontaneous combustion |
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| CN201610270069.5A CN105954459B (en) | 2016-04-27 | 2016-04-27 | The device that a kind of detection coal mine gob gas pumping influences on coal spontaneous combustion |
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| CN105954459B true CN105954459B (en) | 2017-10-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106290654B (en) * | 2016-09-22 | 2019-02-05 | 安徽理工大学 | A kind of coal spontaneous ignition symbolic gas experimental rig and its test method |
| CN106770897B (en) * | 2016-11-17 | 2019-03-19 | 中国矿业大学 | A kind of gas drainage is coupled with coal spontaneous combustion causes calamity experimental simulation device and method |
| CN108332899A (en) * | 2018-02-28 | 2018-07-27 | 中煤科工集团重庆研究院有限公司 | Pressure equalizing, ventilating, drilling and measuring device for coal mine |
| CN109655575A (en) * | 2019-01-06 | 2019-04-19 | 山东科技大学 | It is a kind of to simulate spontaneous combustion in goaf and three experimental systems and method with distribution |
| CN110196315B (en) * | 2019-05-30 | 2021-08-17 | 余明高 | Gas three-dimensional extraction and goaf natural ignition coupling test system |
| CN111141866B (en) * | 2020-01-14 | 2022-11-11 | 山东科技大学 | Test device and method for simulating spontaneous combustion process of coal seam and detection of high-temperature abnormal area |
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| SU1112127A2 (en) * | 1983-03-31 | 1984-09-07 | Восточный научно-исследовательский институт по безопасности работ в горной промышленности | Method for preventing endogenic fires in the extracted space in working-out steep seams of coal by sublevel caving method with hydraulic breaking |
| RU2276267C1 (en) * | 2005-03-10 | 2006-05-10 | Государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный горный институт им. Г.В. Плеханова (технический университет)" | Development method for thick steep coal seams liable to spontaneous ignition |
| CN201037402Y (en) * | 2007-03-06 | 2008-03-19 | 中国矿业大学 | Goaf decompression coal bed gas extracting simulation experiment device |
| CN102345469B (en) * | 2010-08-05 | 2013-12-04 | 太原理工大学 | Test analog device for studying gas migration in mined-out area under different ventilation conditions |
| CN103775122B (en) * | 2014-02-25 | 2015-12-09 | 中国矿业大学(北京) | Easy spontaneous combustion high gas layer goaf gas extraction and spontaneous combustionof coal analogue experiment installation |
| CN205720127U (en) * | 2016-04-27 | 2016-11-23 | 河南理工大学 | A kind of detect the device that coal spontaneous combustion is affected by coal mine gob gas pumping |
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