CN105954459A - Device for detecting influence of coal mine goaf gas drainage on coal spontaneous combustion - Google Patents
Device for detecting influence of coal mine goaf gas drainage on coal spontaneous combustion Download PDFInfo
- Publication number
- CN105954459A CN105954459A CN201610270069.5A CN201610270069A CN105954459A CN 105954459 A CN105954459 A CN 105954459A CN 201610270069 A CN201610270069 A CN 201610270069A CN 105954459 A CN105954459 A CN 105954459A
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- coal
- spontaneous combustion
- thermal
- insulating body
- coal mine
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- 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
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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
Abstract
The invention belongs to the technical field of coal seam spontaneous combustion prevention and treatment, in particular, relates to a device for detecting influence of coal mine goaf gas drainage on coal spontaneous combustion, and mainly provides the device for detecting and inspecting the influence of coal mine goaf gas drainage on residual coal spontaneous combustion; changes of temperature, air pressure and internal gap wind pressure in an oxidation temperature-rising process of goaf residual coal are researched through tests under different gas drainage quantities, and the device for detecting the influence of coal mine goaf gas drainage on coal spontaneous combustion is provided. The device includes a thermal insulation box body; the lower layer of the thermal insulation box body is provided with a coal sample reaction chamber; the upper layer of the thermal insulation box body is provided with a negative pressure chamber; a crack simulation zone is arranged between the coal sample reaction chamber and the negative pressure chamber; a uniform flow cavity is arranged in the negative pressure chamber and is directly connected with an external exhaust fan; a monitoring cross section is further arranged inside the thermal insulation box body. Through fixing drainage negative pressure work conditions, the flow quantify and the negative pressure changes of a gas guide pipe in the spontaneous combustion happening process are monitored.
Description
Technical field
The invention belongs to coal seam spontaneous combustion technical field；Particularly relate to a kind of detection coal mine gob gas take out
Adopt the device on coal spontaneous combustion impact.
Background technology
Highly gassy mine and spontaneous fire seam are that two during Safety of Coal Mine Production threaten greatly, easy especially for high methane
The mine of spontaneous combustion, is carrying out while gas pumping alleviates harm, and existing gas pumping technology can aggravate goaf air leaking, enters
And causing spontaneous combustion of remaining coal, goaf gas extraction technology is widely applied in China, under the conditions of negative pressure extraction, leaks out
Aggravation will certainly produce to Residual coal in goaf oxidation heat up disturbance effect, therefore, by concrete analog, in difference
Negative pressure extraction under the conditions of, launch goaf air leaking power and the research of spontaneous combustion of remaining coal characteristic, find rational goaf gas
Extraction condition, prevents and treats coordinating gas control and coal spontaneous combustion, ensure Safety of Coal Mine Production everything goes well with your work carry out significant.
Summary of the invention
The goal of the invention of the present invention:
Primarily to the detection verifying attachment providing a kind of coal mine gob gas pumping that spontaneous combustion of remaining coal is affected, it is test
Study under different gas pumping amounts, the space blast of temperature, air pressure, inside in the oxidation intensification process of Residual coal in goaf
Change, and pass through relative analysis, it is determined that the gas pumping amount disturbance effect to spontaneous combustion of remaining coal.
The technical scheme is that
Provide and a kind of detect the device that coal spontaneous combustion is affected by coal mine gob gas pumping, including thermal-insulating body, at couveuse
The lower floor of body is provided with coal sample reative cell, and the upper strata of thermal-insulating body is provided with negative pressure chamber, coal sample reative cell and negative pressure chamber it
Between be provided with simulation region, crack, in negative pressure chamber, be provided with current-sharing cavity, current-sharing cavity directly air exhauster with outside is connected,
Gas flowmeter, flow control valve and U-shaped water column meter, U-shaped water column meter also it is disposed with between current-sharing cavity and air exhauster
Also directly it is connected with pitot tube, inside thermal-insulating body, is additionally provided with monitoring section, in monitoring section, be provided with monitoring point, prison
Measuring point is directly connected with outside gas chromatograph, is additionally provided with electrically heated rod in coal sample reative cell, and it is direct and outside
Temperature controller is connected, and temperature controller is directly connected with analysis main frame with gas chromatograph.
It is provided with heat-preserving cover plate on 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 simulation region, crack within thermal-insulating body and coal sample reative cell, 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, is provided with rubble in simulation region, crack.
Described current-sharing cavity is made up of the guide plate of orifice plate and inclination.
The described electrically heated rod in coal sample reative cell is equally distributed four.
The monitoring point of monitoring section is provided with temperature sensor.
The invention has the beneficial effects as follows:
Temperature, gas componant and gas in the spontaneous combustion of remaining coal oxidizing process of coal mine gob can be monitored in real time by this assay device
The change of relative pressure, leaks out inside identification goaf and spontaneous combustion solid distribution characteristics；Simultaneously by different extraction Coal Unders
Sample oxidation intensification process analysis, it is thus achieved that the critical extraction of spontaneous combustion is leaked out speed, and then determines safety gas extraction amount；Additionally, pass through
Fixing extraction negative pressure operating mode, monitors flow and the negative pressure variation of airway in spontaneous combustion generating process, in determining self-heating loose coal
Thermal air pressure effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of the thermal-insulating body of the present invention.
In figure；1 is thermal-insulating body；2 is coal sample reative cell；3 is simulation region, crack；4 is negative pressure chamber；5 is current-sharing cavity；6
For air exhauster；7 is gas flowmeter；8 is U-shaped water column meter；9 is flow control valve；10 is pitot tube；11 is monitoring section；12
For monitoring point；13 is gas chromatograph；14 is electrically heated rod；15 is temperature controller；16 for analyzing main frame；17 is insulation cover
Plate；18 is screen skeleton；19 is I-steel；20 is rubble；21 is orifice plate；22 is guide plate；23 is temperature sensor.
Detailed description of the invention
Below in conjunction with accompanying drawing, the detailed description of the invention of the present invention is described in detail.
As shown in Fig. 1～2, it is provided that a kind of detect the device that coal spontaneous combustion is affected by coal mine gob gas pumping, including
Thermal-insulating body 1, the lower floor at thermal-insulating body 1 is provided with coal sample reative cell 2, and the upper strata of thermal-insulating body is provided with negative pressure chamber 4,
It is provided with simulation region, crack 3 between coal sample reative cell and negative pressure chamber, in negative pressure chamber 4, is provided with current-sharing cavity 5, current-sharing cavity 5
Directly it is connected with outside air exhauster 6, between current-sharing cavity 5 and air exhauster 6, is also disposed with gas flowmeter 7, stream
Adjustable valve 9 and U-shaped water column meter 8, U-shaped water column meter 8 is also directly connected with pitot tube 10, is additionally provided with inside thermal-insulating body
Monitoring section 11, is provided with monitoring point 12 in monitoring section 11, monitoring point 12 is directly connected with outside gas chromatograph 13,
Being additionally provided with electrically heated rod 14 in coal sample reative cell, it is directly connected with outside temperature controller 15, temperature controller 15
Directly it is connected with analysis main frame 16 with gas chromatograph 13.
It is provided with heat-preserving cover plate 17 on the top of thermal-insulating body 1, and the height of thermal-insulating body is 1.6 meters；At thermal-insulating body
The heat-preserving cover plate that top is arranged uses embedded water seal to process, and effectively ensure that this device sealing in process of the test
Can, and in order to verify coal sample during low-temperature oxidation, due in coal sample solid space thermograde and gas density it
Between there are differences, in order to verify the pressure change that this difference is caused, so the height of the thermal-insulating body of this assay device 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；Make that there is bottom thermal-insulating body certain bearing strength by arranging screen skeleton, bottom with I-steel hold up with
The distinguished and admirable all pressures that guarantee to leak out are distributed in coal body space.
Described monitoring section is arranged in the simulation region, crack 3 within thermal-insulating body and coal sample reative cell 2, and from upper and
Lower spaced set, the number of monitoring section 11 is set to five；The monitoring section using this spaced set can make monitoring
Sampling process is more uniformly rationally.
Coal sample reative cell 2 in thermal-insulating body 1 is provided with loose coal, is provided with rubble 20 in simulation region, crack 3.
Described current-sharing cavity 5 is made up of orifice plate 21 and the guide plate 22 tilted；It is provided with the guide plate at certain inclination angle, to reach
To the uniform purpose of extraction suction function so that the air that leaks out, uniformly through coal sample reative cell and simulation region, crack, is finally concentrated
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, the heating process of assay device in real time and can be carried out uniformly, in order to control coal body heat temperature raising gradient in time.
The monitoring point of monitoring section is provided with temperature sensor；The data that this monitoring point is monitored are passed by temperature
Sensor and gas sample collecting device for air, by pipeline and gas chromatograph, be connected with host analysis unit, can be to inspection during monitoring
Put into airway in gaging hole mouth, connect U-shaped water column meter, it is possible to achieve the observation of the air pressure change process of different detection sections.
The cardinal principle of this coal body goaf detection assay device is for passing through top by rubble in simulation simulation region, crack
The change of the intensity of pressure of negative pressure chamber and the change situation of the compaction of rubble itself that formed, simulation top, goaf overlying strata
The channel form that leaks out, in real time in monitoring spontaneous combustion in goaf oxidizing process, temperature, gas componant, gas relative pressure become
Change, leak out inside identification goaf and spontaneous combustion solid distribution characteristics；Simultaneously by coal sample oxidation under the conditions of different extractions heat up into
Journey is analyzed, it is thus achieved that the critical extraction of spontaneous combustion is leaked out speed, and then determines safety gas extraction amount；Additionally, by fixing extraction negative pressure
Operating mode, monitors flow and the negative pressure variation of airway in spontaneous combustion generating process, determines the thermal air pressure effect in self-heating loose media.
The testing process of this experiment detection device is:
Before experiment starts, temperature sensor 23 and gas chromatograph 13 are corrected, after correction, coal sample is natural
It is deposited in coal sample reative cell 2, will fix containing the sleeve pipe of temperature sensor and gas sample collecting device for air in coal sample banking process,
Adjusting simultaneously and fix the position of heating rod 14, fill rubble subsequently in simulation region, crack 3, rubble granularity the most gradually increases
Greatly, the sleeve pipe of monitoring section is fixed by filling process equally；After covering heat-preserving cover plate 17, open exhaust ventilation machine 6, connect
Pitot tube 10 and U-shaped water column meter 8, and regulate experiment condition point according to gas flowmeter 7 and gas flow control valve 9, passing through
When pitot tube and U-shaped water column meter carry out pressure measurement, first pitot tube is inserted in air duct, just to wind direction, in detecting airduct
The differential static pressure in portion, is then connected to pitot tube detect that the dynamic pressure in this air duct is poor by U-shaped water column meter on U-shaped water column meter,
Described distinguished and admirable relative total head is equal to differential static pressure and the algebraical sum of dynamic pressure difference, thus provides corresponding blast number for test
According to.
Then electrically heated rod 14 is connected with temperature controller 15 with temperature sensor 23, after experiment condition point is stable,
Temperature controller 15 sets heating-up temperature.Host analysis unit is i.e. analyzed main frame 16 and is started the intensification process of record analysis coal
Changing with the gas componant collected by gas chromatograph 13, in test process, the detection aperture by offering in detection section is put
Enter airway, connect the gas pressure change of U-shaped water column meter record different section, observe the spontaneous combustion of coal under different extraction amount special
Property；After coal body rises to uniform temperature, stop heating rod 14 and heat, due to unbalanced temperature place forming inside checking coal body
The power that leaks out.
It is relative with gas that the present invention can monitor temperature in the spontaneous combustion of remaining coal oxidizing process of coal mine gob, gas componant in real time
The change of pressure, leaks out inside identification goaf and spontaneous combustion solid distribution characteristics；Simultaneously by coal sample oxygen under the conditions of different extractions
Change intensification process analysis, it is thus achieved that the critical extraction of spontaneous combustion is leaked out speed, and then determines safety gas extraction amount；Additionally, by fixing
Extraction negative pressure operating mode, monitors flow and the negative pressure variation of airway in spontaneous combustion generating process, determines the heat in self-heating loose coal
Blast effect.
Claims (8)
1. detect the device that coal spontaneous combustion is affected by coal mine gob gas pumping, 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, at coal sample reative cell with negative
It is provided with simulation region, crack between pressure chamber, in negative pressure chamber, is provided with current-sharing cavity, the air exhauster that current-sharing cavity is direct with outside
It is connected, between current-sharing cavity and air exhauster, is also disposed with gas flowmeter, flow control valve and U-shaped water column meter, U-shaped
Water column meter is also directly connected with pitot tube, is additionally provided with monitoring section inside thermal-insulating body, is provided with prison in monitoring section
Measuring point, monitoring point is directly connected with outside gas chromatograph, is additionally provided with electrically heated rod in coal sample reative cell, its directly and
Outside temperature controller is connected, and temperature controller is directly connected with analysis main frame with gas chromatograph.
The most according to claim 1 a kind of detect the device that coal spontaneous combustion is affected by coal mine gob gas pumping, its feature
It is: be provided with heat-preserving cover plate on the top of thermal-insulating body, uses water seal to process.
The most according to claim 1 a kind of detect the device that coal spontaneous combustion is affected by coal mine gob gas pumping, 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.
The most according to claim 1 a kind of detect the device that coal spontaneous combustion is affected by coal mine gob gas pumping, its feature
It is: described monitoring section is arranged in the simulation region, crack within thermal-insulating body and coal sample reative cell, and from top to down etc.
Spacing is arranged, and the number of monitoring section is set to five.
The most according to claim 1 a kind of detect the device that coal spontaneous combustion is affected by coal mine gob gas pumping, its feature
It is: the coal sample reative cell in thermal-insulating body is provided with loose coal, is provided with rubble in simulation region, crack.
The most according to claim 1 a kind of detect the device that coal spontaneous combustion is affected by coal mine gob gas pumping, its feature
It is: described current-sharing cavity is made up of the guide plate of orifice plate and inclination.
The most according to claim 1 a kind of detect the device that coal spontaneous combustion is affected by coal mine gob gas pumping, its feature
It is: the described electrically heated rod in coal sample reative cell is equally distributed four.
The most according to claim 1 a kind of detect the device that coal spontaneous combustion is affected by coal mine gob gas pumping, its feature
It is: on the monitoring point of monitoring section, be provided with temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN105954459A true CN105954459A (en) | 2016-09-21 |
| CN105954459B CN105954459B (en) | 2017-10-10 |
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| CN201610270069.5A Expired - Fee Related 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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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106770897A (en) * | 2016-11-17 | 2017-05-31 | 中国矿业大学 | A kind of gas pumping couples cause calamity experimental simulation device and method with coal spontaneous combustion |
| WO2018054046A1 (en) * | 2016-09-22 | 2018-03-29 | 安徽理工大学 | Testing apparatus for indicator gases of spontaneous combustion of coal, and testing method of testing apparatus |
| CN108332899A (en) * | 2018-02-28 | 2018-07-27 | 中煤科工集团重庆研究院有限公司 | Coal mine pressure ventilation drilling pressure measuring unit |
| 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 |
| CN110196315A (en) * | 2019-05-30 | 2019-09-03 | 余明高 | A kind of gas solid extraction and Study on Protection of Spontaneous Combustion coupling test system |
| CN111141866A (en) * | 2020-01-14 | 2020-05-12 | 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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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110196315A (en) * | 2019-05-30 | 2019-09-03 | 余明高 | A kind of gas solid extraction and Study on Protection of Spontaneous Combustion coupling test system |
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| CN111141866A (en) * | 2020-01-14 | 2020-05-12 | 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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