CN109655575A - It is a kind of to simulate spontaneous combustion in goaf and three experimental systems and method with distribution - Google Patents
It is a kind of to simulate spontaneous combustion in goaf and three experimental systems and method with distribution Download PDFInfo
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- CN109655575A CN109655575A CN201910009959.4A CN201910009959A CN109655575A CN 109655575 A CN109655575 A CN 109655575A CN 201910009959 A CN201910009959 A CN 201910009959A CN 109655575 A CN109655575 A CN 109655575A
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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
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels, explosives
- G01N33/222—Solid fuels, e.g. coal
Abstract
The purpose of the present invention is to provide a kind of simulation spontaneous combustion in goaf and three experimental systems and method with distribution, including experiment oven body part, goaf analog material part, air feed and discharge portion, gas collecting and analysis part, automatic temperature measurement and monitoring system, six part of mechanical part composition.The selection of analog material is carried out first, next the building of mined out sound zone system is simulated, thermometric and gas is taken to arrange, the laying of similar materials and mined out sound zone system, finally carry out the simulation of goaf coal spontaneous ignition process, coal spontaneous combustion three is monitored and analyzes with distributed area ignition process simulation, and to simulation process.The beneficial effects of the invention are as follows can under the accurate and effective simulation air-proof condition of laboratory goaf coal spontaneous be under fire and different distributions band burning overall process.
Description
Technical field
The invention belongs to technical field of coal exploitation, it is related to the realities that a kind of simulation spontaneous combustion in goaf and three bands are distributed
Check system and method.
Background technique
Spontaneous combustionof coal is one of disaster common in coal mining and storage and transport process, causes the significant wastage of resource, seriously
Threaten the lives and properties of people.In the past studies have shown that the occurrence and development of coal spontaneous combustion are an extremely complex, dynamic changes
, the physical and chemical process automatically speeded up, in addition coal is a kind of physical structure and the extremely complex unevenness of chemical mine material composition
Even body, exact molecular structure model there is no final conclusion, be difficult theoretically to get the process of coal spontaneous combustion occurrence and development clear.Separately
Outside, since coal spontaneous combustion often betides the goaf of hundreds of meters of underground depths, personnel can not be approached, the concealment of fire source, so that from
The accurately detecting for firing fire location becomes the key technology of fire extinguishing.So far, a kind of highly effective not yet both at home and abroad
Detection method accurately to carry out early prediction to spontaneous combustionof coal and determines its position.Therefore, a kind of simulation coal spontaneous is invented in research
Be under fire and the experimental provisions and method of three band distributions, the goaf coal under the conditions of experiment different types of coal, oxygen concentration, coal thickness etc. oneself
Gas migration and composition transfer, Temperature Distribution when combustion and different distributions are with coal combustion monitor spontaneous combustion process temperature, gas group
Divide variation, gas migration trend carries out some other characterisitic parameter in the oxidisability, exothermicity and Coal Self-ignition Process of coal
Research, and propose Coal Self-ignition Process judge index, early prediction is carried out to spontaneous combustionof coal.With vital meaning.
Summary of the invention
The purpose of the present invention is to provide a kind of simulation spontaneous combustion in goaf and three experimental systems with distribution and sides
Method, the beneficial effects of the invention are as follows can under the accurate and effective simulation air-proof condition of laboratory goaf coal spontaneous be under fire and
The overall process of different distributions band burning.
The technical scheme adopted by the invention is that including experiment oven body part, goaf analog material part, air feed and row
Gas part, gas collecting and analysis part, automatic temperature measurement and monitoring system, six part of mechanical part composition.
The experiment furnace body specifically includes that furnace body outer layer plate, common brick layer, polyurethane thermal insulation layer, water interlayer, fire resisting
Brick layer, blast pipe, backwind tube, top cover, coal outlet.
Goaf analog material part includes: that coal seam, analog material bottom plate, the coal working face of simulation, arch are engraved
Empty pillar.
The energy supply and discharge portion include: air blower, heat exchanger, heat exchanger control cabinet, gas gauge, gas survey
Warm galvanic couple, vortex-shedding meter, heating tube.
The gas collecting and analysis part include: to take gas beam tube, gas collector, gas chromatograph.
The automatic temperature measurement and monitoring system part include: multipoint thermocouple measuring staff, thermocouple, temperature collecting module, work
Control machine.
The pressure and hermetic unit include: jack, connecting bracket, sealing steel plate.
Further, the method for spontaneous combustion in goaf is simulated, comprising the following steps:
Step 1, the selection of analog material
According to principle of similitude theory, using river sand as aggregate, clay is cement, utilizes orthogonal test and comprehensive experiment side
Method analyzes the uniaxial compressive strength under different materials proportion, and compares with the compression strength calculated using the principle of similitude, really
Surely meet the different adjoining rock river sands and clay proportion of the likelihood ratio；Coal cinder needed for acquiring in working site, is used as experiment
Coal.Loess is chosen as coating.Coal seam and top bottom are determined according to the 1/10~1/30 of live actual (real) thickness geometry pantograph ratio
The thickness of plate analog material.
Step 2, the building of mined out sound zone system is simulated
It is laid with three parts coal working face by the jack of different pressures, is heat-radiation belt, self-sustaining combustion zone and asphyxia respectively
Band is formed coal spontaneous combustion " three bands ", the descending arrangement of " three bands " the loose compactness extent of coal body, and respectively by coal spontaneous " three bands "
It is sealed with sealing steel plate.
The experimental furnace blast pipe, air inlet, coal working face, air return lane and backwind tube constitute simulation goaf
And the air entering and returning system of work plane system, air inlet, coal working face and air return lane are constructed by arch hollow out pillar, it can mould
Quasi- air inlet and work are towards leaking out in goaf.
Step 3, thermometric and take gas beam tube arrange
While being laid with goaf coal seam and top plate analog material, in corresponding position, point buries multipoint thermocouple measuring staff
With take gas beam tube, measuring staff and gas beam tube and analog material is taken to be in close contact, gas beam tube air hatch is taken to have proofing dust and protecting, anti-leak-stopping
Wind.
The multipoint thermocouple measuring staff short transverse arranges multiple thermocouple measuring points altogether from bottom to top, can monitor mined out
Temperature value on area's bottom plate to top plate different height.Thermocouple measuring staff is arranged in gridding, can monitor entire goaf three
The temperature value of dimension space.
Described that gas beam tube is taken to be distributed within the scope of goaf in gridding, each position takes gas beam tube can be to goaf
Multiple location points in short transverse carry out taking gas, so that analysis obtains the gas of coal spontaneous combustion " three bands " and goaf three-dimensional space
Body component, concentration distribution and Evolution.
Step 4, the laying of similar materials and mined out sound zone system
Lay analog material bottom plate, coal spontaneous combustion " three bands " from bottom to top in experimental furnace body, side is laid with the different pressures of lateral dominance
The jack of power carries out compaction treatment, makes it have certain intensity, meets wanting for the goaf adjoining rock intensity likelihood ratio
It asks.
Since coal seam, it is laid with arch hollow out pillar in air inlet, coal working face and air return lane, support coal body is formed
Certain channel space, to construct the air entering and returning system in goaf and working face.Blast pipe in the air inlet and experimental furnace
It is connected, air return lane is connected with the backwind tube on experimental furnace.
Step 5, the simulation of goaf coal spontaneous ignition process
It leaks out due to air inlet and with coal working face, leads to lose coal in goaf contacting with oxygen, in the object of coal oxygen
Under reason absorption, chemisorption and oxidation reaction effect, small heat is generated, and oxidation rate of heat production is big under certain condition
In the rate of heat dispation to environment, generate heat and gather so that coal temperature slowly constantly rises, when reach coal it is critical from
After hot temperature, oxidation heating rate is accelerated, and finally reaches the ignition temperature of coal and blazes up, thus referred to as coal spontaneous
Ignition process.
As long as coal spontaneous combustion be coal oxidation heat production with to the contradiction of function of environment heat emission develop as a result, therefore with coal spontaneous combustion
Journey heat production and heat can influence the spontaneous fire process of coal to the relevant factor of function of environment heat emission.Internal factor and outer can be divided into
In factor.Its internal factor includes degree of coalification, the moisture of coal, lithotype of coal, the sulfur content of coal, the granularity of coal and hole knot
The gas bearing capacity of structure, coal；Its external factor include coal geology occurrence condition (coal seam thickness, inclination angle, buried depth, texture
Make and rock property), (coal amount and its intensity, top plate are lost in exploiting field drawing speed, back production phase, goaf to extraction technique factor
Management method, coal column and its extent of the destruction, goaf closing difficulty or ease etc.), ventilating management factor (goaf sealed vol).
Step 6, coal spontaneous combustion " three bands " distributed area ignition process simulation
Heating tube is inserted in heat-radiation belt or self-sustaining combustion zone certain point, by heating make the coal body reach ignition point and
It blazes up.
A kind of simulation spontaneous combustion in goaf and three experimental provisions with distribution of the present invention, both can be to a certain
Goaf under specified conditions carries out the simulation of coal spontaneous ignition process；Control variate method can be used again, to influence coal spontaneous combustion
One or more factors carry out experimental study.
It include: root to the simulation sub-step of the goaf coal spontaneous ignition process under a certain specified conditions in above-mentioned steps 5
According to the actual conditions in live goaf, including above-mentioned internal factor and external factor, in laboratory, scale uses theory of similarity mould
Quasi- goaf coal spontaneous ignition process, obtains the spontaneous combustion in goaf phase；Heterogeneous goaf high-temperature region range and propagation law,
Including ignition point (fire source) position, range, fire intensity, the research of thermo parameters method；Heterogeneous goaf index gas concentration,
Component, distribution and propagation law.Above-mentioned steps 6 obtain the burning pair of different distributions band by carrying out hand-firing to different location
Fire intensity, thermo parameters method, gas concentration, component, distribution and propagation law influence.
Experimental study is carried out to the one or more factors for influencing coal spontaneous combustion using control variate method in above-mentioned steps 5,6
Sub-step include: the one or more influence factors chosen in above-mentioned internal factor and external factor, pass through the number of the factor
Value variation, studies the factor to the influence degree of coal spontaneous ignition process, analyzes factor variation to coal spontaneous combustion main feature
The shadow of (such as spontaneous combustion period, temperature field, distribution of concentration, index gas changing rule), spontaneous combustion period and goaf
Ring rule.
Step 7, data monitoring and analysis
Main monitoring data in experimentation of the present invention are as follows: air inlet parameter (temperature, pressure, flow), return air ginseng
Number (temperature, pressure, flow, gas component), goaf monitoring point temperature value, goaf monitoring point gas component and concentration value.
The air inlet parameter is by the gas temperature thermocouple, gas gauge, the vortex-shedding meter that are arranged on air inlet pipeline
Etc. equipment monitorings；The return air parameter is by the gas temperature thermocouple, gas gauge, vortex street stream that are arranged on air return pipeline
The equipment monitorings such as meter, gas chromatograph；Goaf monitoring point temperature value is by the multipoint thermocouple that is arranged in goaf
Thermocouple monitoring in measuring staff；Goaf monitoring point gas component and concentration value take gas beam by being arranged in goaf
The equipment monitorings such as pipe and gas chromatograph.
All monitoring data pass through data collecting module collected and are transported to industrial personal computer, are counted by related monitoring of software
According to record, analysis and storage.
Detailed description of the invention
Fig. 1 is coal spontaneous combustion " three bands " coal body loose crushing degree distribution figure
Fig. 2 is goaf coal spontaneous combustion imitative experimental appliance elevation；
Fig. 3 is goaf coal spontaneous combustion imitative experimental appliance planar system figure；
Fig. 4 is three band distribution maps.
In figure: in figure: 1- furnace body outer layer plate；The common brick layer of 2-；3- polyurethane adiabatic layer；4- water interlayer；5- refractory brick
Layer；6- jack；7- top cover；8- coal outlet；9- analog material bottom plate；10- suffocative zone；The coal seam 11-；12- self-sustaining combustion zone；13- heat
Galvanic couple；14- takes gas beam tube；15- arch hollow out pillar；16- blast pipe；17- backwind tube；18- heat-radiation belt；19- air blower；20-
Heat exchanger；21- heat exchanger control cabinet；22- gas gauge；23- gas temperature thermocouple；24- vortex-shedding meter；25- temperature
Acquisition module；26- gas collector；27- gas chromatograph；28- industrial personal computer；29- air inlet；30- air return lane；31- simulation
Coal working face；32- multipoint thermocouple measuring staff；33- sealing steel plate；34- connecting bracket；35- heating tube.
Specific embodiment
The present invention is described in detail With reference to embodiment.
Present system is as depicted in figs. 1 and 2, and experiment furnace body specifically includes that furnace body outer layer plate 1, common brick layer 2, gathers
Urethane thermal insulation layer 3, water interlayer 4, fire brick layer 5, blast pipe 16, backwind tube 17, top cover 7, coal outlet 8.The present invention tests furnace body
Generally cylindrical body, experimental furnace outer diameter are 3.73m, and internal diameter is 2.8m in experimental furnace body, and clear height is 2.5m in experimental furnace body.
Goaf analog material part includes: coal seam 11, analog material bottom plate 9, suffocative zone 10, self-sustaining combustion zone 12, dissipates
The torrid zone 18, arch hollow out pillar 15, air inlet 29, air return lane 30, the coal working face 31 simulated.The goaf range is
The region 1.4m × 2.0m, the high 0.3m of analog material negative, coal spontaneous combustion " three bands " high 0.6m.
The energy supply and discharge portion include: air blower 19, heat exchanger 20, heat exchanger control cabinet 21, gas gauge
22, gas temperature thermocouple 23, vortex-shedding meter 24, heating tube 35.
The gas collecting and analysis part include: to take gas beam tube 14, gas collector 32, gas chromatograph 33.
The automatic temperature measurement and monitoring system part include: multipoint thermocouple measuring staff 32, thermocouple 13, temperature acquisition mould
Block 25, industrial personal computer 28.
The pressure and hermetic unit include: jack 6, sealing steel plate 33, connecting bracket 34.
Test method of the present invention is as shown in Figure 3, comprising the following steps:
Step 1, the selection of analog material
According to principle of similitude theory, using river sand as aggregate, clay, gypsum are cement, using orthogonal test and comprehensively real
Proved recipe method analyzes the uniaxial compressive strength under different materials proportion, and carries out with the compression strength calculated using the principle of similitude pair
Than determining the different adjoining rock river sands for meeting the likelihood ratio and clay proportion；Coal cinder needed for being acquired in working site, as
Coal is used in experiment.Loess is chosen as coating.Coal seam is determined according to the 1/10~1/30 of live actual (real) thickness geometry pantograph ratio
With the thickness of roof and floor analog material, coal seam and roof and floor analog material are laid with based on similar material mixture.
Step 2, the building of mined out sound zone system is simulated
Air inlet 29, the air return lane 30 of goaf and working face are constructed by being laid with arch hollow out pillar 15.
The experimental furnace blast pipe 16, air inlet 29, air return lane 30 and backwind tube 17 constitute simulation goaf and work
Make the air entering and returning system of plane system, air inlet 29, coal working face 31 and 30 lane of return air are constructed by arch hollow out pillar 15,
Analog air inlet 29 and working face 31 leaking out into goaf.
Step 3, thermometric and gas is taken to arrange
(three band distributions such as Fig. 4), in corresponding position, point is buried while being laid with goaf coal seam 11 and coal spontaneous combustion " three bands "
If multipoint thermocouple measuring staff 32 and taking gas beam tube 14, measuring staff 32 and gas beam tube 14 and analog material close contact are taken, takes gas beam tube
14 air hatch have proofing dust and protecting, with Anti-air-leakage, it is ensured that sealing.
32 short transverse of multipoint thermocouple measuring staff arranges multiple 13 measuring points of thermocouple altogether from bottom to top, can monitor
Temperature value on " three bands " different height.Thermocouple measuring staff 32 is arranged in gridding, can monitor entire goaf three-dimensional space
Between temperature value.
Described that gas beam tube 14 is taken to be distributed within the scope of goaf in gridding, each position takes gas beam tube 14 can be to adopting
Multiple location points in the short transverse of dead zone carry out taking gas, so that analysis obtains gas component, the concentration of goaf three-dimensional space
Distribution and Evolution.
Step 4, the laying of similar materials and mined out sound zone system
Lowest level lays analog material bottom plate 9 in experimental furnace body, is laid with the coal spontaneous combustion " three of 1.4m × 2.0m on it
Band "-suffocative zone 10, self-sustaining combustion zone 12, heat-radiation belt 18, carry out compaction treatment with the jack of 70MPa, 50MPa, 30MPa respectively,
And it is sealed with sealing steel plate 33.
Since coal seam 8, arch hollow out pillar 15, support are laid in air inlet 29, coal working face 31 and air return lane 30
Coal body forms certain channel space, to construct the air entering and returning system in goaf and working face.The air inlet 29 and experimental furnace
On blast pipe 16 be connected, air return lane 30 is connected with the backwind tube 17 on experimental furnace.
Step 5, the simulation of goaf coal spontaneous ignition process
Due to the sealing of air inlet 29 and coal working face 31, something lost coal in goaf is caused to contact with oxygen, in coal oxygen
Under physical absorption, chemisorption and oxidation reaction effect, small heat is generated, and aoxidize rate of heat production under certain condition
It greater than the rate of heat dispation to environment, generates heat and gathers so that coal temperature slowly constantly rises, when reaching the critical of coal
After self-heating temperature, oxidation heating rate accelerate, finally reach the ignition temperature of coal and blaze up, thus referred to as coal from
So ignition (or coal spontaneous combustion) process.
As long as coal spontaneous combustion be coal oxidation heat production with to the contradiction of function of environment heat emission develop as a result, therefore with coal spontaneous combustion
Journey heat production and heat can influence the spontaneous fire process of coal to the relevant factor of function of environment heat emission.Internal factor and outer can be divided into
In factor.Its internal factor includes degree of coalification, the moisture of coal, lithotype of coal, the sulfur content of coal, the granularity of coal and hole knot
The gas bearing capacity of structure, coal；Its external factor include coal geology occurrence condition (coal seam thickness, inclination angle, buried depth, texture
Make and rock property), (coal amount and its intensity, top plate are lost in exploiting field drawing speed, back production phase, goaf to extraction technique factor
Management method, coal column and its extent of the destruction, goaf closing difficulty or ease etc.), ventilating management factor (goaf sealed vol).
Step 6, coal spontaneous combustion " three bands " distributed area ignition process simulation
Heating tube 35 is inserted in heat-radiation belt 18 or a certain position of self-sustaining combustion zone 12, reaches the position coal body by heating
It blazes up to ignition point.
A kind of simulation spontaneous combustion in goaf and three experimental provisions with distribution of the present invention, both can be to a certain
Goaf under specified conditions carries out the simulation of coal spontaneous ignition process；Control variate method can be used again, to influence coal spontaneous combustion
One or more factors carry out experimental study.
It include: root to the simulation sub-step of the goaf coal spontaneous ignition process under a certain specified conditions in above-mentioned steps 5
According to the actual conditions in live goaf, including above-mentioned internal factor and external factor, in laboratory, scale uses theory of similarity mould
Quasi- goaf coal spontaneous ignition process, obtains the spontaneous combustion in goaf phase；Heterogeneous goaf high-temperature region range and propagation law,
Including ignition point (fire source) position, range, fire intensity, the research of thermo parameters method；Heterogeneous goaf index gas concentration,
Component, distribution and propagation law.Above-mentioned steps 6 obtain the burning pair of different distributions band by carrying out hand-firing to different location
Fire intensity, thermo parameters method, gas concentration, component, distribution and propagation law influence.
Experimental study is carried out to the one or more factors for influencing coal spontaneous combustion using control variate method in above-mentioned steps 5,6
Sub-step include: the one or more influence factors chosen in above-mentioned internal factor and external factor, pass through the number of the factor
Value variation, studies the factor to the influence degree of coal spontaneous ignition process, analyzes factor variation to coal spontaneous combustion main feature
The shadow of (such as spontaneous combustion period, temperature field, distribution of concentration, index gas changing rule), spontaneous combustion period and goaf
Ring rule.
Step 7, data monitoring and analysis
Main monitoring data in experimentation of the present invention are as follows: air inlet parameter (temperature, pressure, flow), return air ginseng
Number (temperature, pressure, flow, gas component), goaf monitoring point temperature value, goaf monitoring point gas component and concentration value.
The air inlet parameter is by the gas temperature thermocouple 23, gas gauge 22, vortex street stream that are arranged on air inlet pipeline
The equipment monitorings such as meter 24；The return air parameter is by the gas temperature thermocouple 23, the gas gauge that are arranged on air return pipeline
22, the equipment monitorings such as vortex-shedding meter 24, gas chromatograph 27；Goaf monitoring point temperature value is by being arranged in goaf
Thermocouple 13 in interior multipoint thermocouple measuring staff 32 monitors；Goaf monitoring point gas component and concentration value are by arranging
In taking the equipment monitorings such as gas beam tube 14 and gas chromatograph 27 in goaf.
All monitoring data acquire and are transported to industrial personal computer 28 by data acquisition module 25, by related monitoring of software into
Record, analysis and the storage of row data.
It is also an advantage of the present invention that:
(1) device can construct large scale coal working face, air inlet, air return lane and mined out sound zone system, be engraved using arch
Air inlet, working face and the air return lane of empty pillar simulation working surface production system, and analog air inlet and work are towards mined out
Condition of leaking out within the scope of area.
(2) experimental provision can carry out the goaf coal spontaneous ignition process simulation under a certain specified conditions and pass through
Using control variate method the one or more factors for influencing coal spontaneous combustion are carried out with the simulation of experimental study.
(3) experiment furnace interior can be laid with the coal seam of the different loose crushing degree of coal spontaneous combustion " three bands ", can preferably into
Row different distributions band ignition process simulation.
(4) existing goaf coal spontaneous combustion imitative experimental appliance size is small, and therefore, it is difficult to truer from larger space scale
Simulation spontaneous combustion in goaf process.Experimental provision internal diameter of the present invention is 2.8m, interior a height of 2.5m, analog goaf model
It encloses for 1.4m × 2.0m.
(5) it can not be laid with Seam Roof And Floor analog material inside existing goaf coal spontaneous combustion imitative experimental appliance, or
It is laid with limited height, therefore the roof and floor occurrence condition of Residual coal in goaf can not be simulated realistically.It is whole that the present invention tests furnace body
Body is cylindrical body, and interior clear height is 2.5m, it can is laid with analog material bottom plate, coal seam and the analog material top plate of multilayer, always
Height is up to 2.8m, and diameter is 2.8m in experimental furnace body, and total internal packing volume is 15.4m3, total to fill coal seam and analog material
Up to 30 tons, (average analog material bulk density is 2000kg/m3).Therefore, loading of the present invention is big, meets adopting for large scale
Dead zone equivalent material simulating.
(6) existing goaf coal spontaneous combustion imitative experimental appliance can not simulate goaf coal spontaneous combustion " three bands ", therefore can not
Three are simulated realistically with different loose crushing states, the compacting situation of Residual coal in goaf and sealing condition.Present invention experiment
Device is respectively compacted different distributions band by the jack of different pressures, can preferably simulate and lose the loose broken of coal
Broken state, the compacting situation of Residual coal in goaf, and better seal is carried out to three bands by sealing steel plate.
The above is only not to make limit in any form to the present invention to better embodiment of the invention
System, any simple modification that embodiment of above is made according to the technical essence of the invention, equivalent variations and modification,
It belongs in the range of technical solution of the present invention.
Claims (2)
1. a kind of simulation spontaneous combustion in goaf and three experimental systems and method with distribution, it is characterised in that: including experimental furnace
Body portion, goaf analog material part, air feed and discharge portion, gas collecting and analysis part, automatic temperature measurement and monitoring system
System, six part of mechanical part；
Experiment furnace body includes: furnace body outer layer plate, common brick layer, polyurethane thermal insulation layer, water interlayer, fire brick layer, blast pipe, returns
Air hose, top cover, coal outlet；
Goaf analog material part includes: coal seam, analog material bottom plate, the coal working face of simulation, arch hollow out pillar；
Energy supply and discharge portion include: air blower, heat exchanger, heat exchanger control cabinet, gas gauge, gas temperature thermocouple,
Vortex-shedding meter, heating tube；
Gas collecting and analysis part include: to take gas beam tube, gas collector, gas chromatograph；
Automatic temperature measurement and monitoring system part include: multipoint thermocouple measuring staff, thermocouple, temperature collecting module, industrial personal computer；
Pressure and hermetic unit include: jack, connecting bracket, sealing steel plate.
2. special according to a kind of simulation spontaneous combustion in goaf described in claim 1 and three experimental systems and method with distribution
Sign is:
Step 1, the selection of analog material
Using river sand as aggregate, clay is cement, coal cinder needed for acquiring in working site, as experiment coal, chooses loess and makees
For coating, the thickness in coal seam and roof and floor analog material is determined according to the 1/10~1/30 of live actual (real) thickness geometry pantograph ratio
Degree；
Step 2, the building of mined out sound zone system is simulated
It is laid with three parts coal working face by the jack of different pressures, is heat-radiation belt, self-sustaining combustion zone and suffocative zone respectively, is formed
Three band of coal spontaneous combustion, the three band descending arrangements of the loose compactness extent of coal body, and three band of coal spontaneous is sealed with sealing steel plate respectively；
Experimental furnace blast pipe, air inlet, coal working face, air return lane and backwind tube constitute simulation goaf and the plane system that works
Air entering and returning system, air inlet, coal working face and air return lane by arch hollow out pillar construct, simulation air inlet and work towards
Leaking out in goaf；
Step 3, thermometric and take gas beam tube arrange
While being laid with goaf coal seam and top plate analog material, in corresponding position, point buries multipoint thermocouple measuring staff and takes gas
Beam tube, measuring staff and takes gas beam tube and analog material to be in close contact, and takes gas beam tube air hatch to have proofing dust and protecting, prevents from leaking out；Multiple spot
Thermocouple measuring staff short transverse arranges multiple thermocouple measuring points altogether from bottom to top, can monitor that gob floor is different high to top plate
Temperature value on degree, thermocouple measuring staff is arranged in gridding, monitors the temperature value of entire goaf three-dimensional space；Take gas beam tube
It is distributed within the scope of goaf in gridding, each position takes gas beam tube to click through multiple positions in the short transverse of goaf
Row takes gas, so that analysis obtains gas component, concentration distribution and the Evolution of three band of coal spontaneous combustion and goaf three-dimensional space；
Step 4, the laying of similar materials and mined out sound zone system
Lay analog material bottom plate, three band of coal spontaneous combustion from bottom to top in experimental furnace body, side is laid with the thousand of lateral dominance different pressures
Jin top carries out compaction treatment, makes it have certain intensity, meets the requirement of the goaf adjoining rock intensity likelihood ratio；From coal
Layer starts, and is laid with arch hollow out pillar in air inlet, coal working face and air return lane, it is empty that support coal body forms certain channel
Between, to construct the air entering and returning system in goaf and working face, air inlet is connected with the blast pipe on experimental furnace, air return lane and experiment
Backwind tube on furnace is connected；
Step 5, the simulation of goaf coal spontaneous ignition process
According to the actual conditions in live goaf, in laboratory, scale was under fire using theory of similarity simulation goaf coal spontaneous
Journey obtains the spontaneous combustion in goaf phase；Heterogeneous goaf high-temperature region range and propagation law, including ignition point fire location, model
Enclose, fire intensity, thermo parameters method；Heterogeneous goaf index gas concentration, component, distribution and propagation law；
Step 6, coal spontaneous combustion three is with distributed area ignition process simulation
Heating tube is inserted in heat-radiation belt or self-sustaining combustion zone certain point, so that the coal body is reached ignition point by heating and has burnt
Come, it is dense against fire intensity, thermo parameters method, gas by obtaining the burning of different distributions band to different location progress hand-firing
Degree, component, distribution and propagation law influence；
Step 7, data monitoring and analysis
Monitoring data are as follows: air inlet parameter, including temperature, pressure, flow, return air parameter include temperature, pressure, flow, gas group
Point, goaf monitoring point temperature value, goaf monitoring point gas component and concentration value；
Air inlet parameter is by Supervisions such as the gas temperature thermocouple, gas gauge, the vortex-shedding meters that are arranged on air inlet pipeline
It surveys；Return air parameter is by the gas temperature thermocouple, gas gauge, vortex-shedding meter, gas-chromatography that are arranged on air return pipeline
Instrument equipment monitoring；Goaf monitoring point temperature value is by the thermocouple monitoring in the multipoint thermocouple measuring staff that is arranged in goaf；
Goaf monitoring point gas component and concentration value take gas beam tube and gas chromatograph equipment monitoring by being arranged in goaf；Institute
There are monitoring data to pass through data collecting module collected and be transported to industrial personal computer, the record of data is carried out by related monitoring of software, is divided
Analysis and storage.
Priority Applications (1)
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110687149A (en) * | 2019-09-02 | 2020-01-14 | 中国地质大学（北京） | Underground coal field fire area typical product dynamic precipitation and release simulation experiment system |
| CN110886618A (en) * | 2019-12-10 | 2020-03-17 | 阜新新纪煤矿科技所 | Working face goaf vertical spontaneous combustion three-zone test method and fire prevention technology |
| CN111504368A (en) * | 2020-04-15 | 2020-08-07 | 河南理工大学 | Three-zone partitioning and experimental method for spontaneous combustion of coal in goaf under high stress condition |
| WO2021042632A1 (en) * | 2019-09-06 | 2021-03-11 | 山东科技大学 | Plane movement deformation measurement system and use thereof in two-dimensional similar simulation experiment |
| CN113063820A (en) * | 2021-03-29 | 2021-07-02 | 华北科技学院(中国煤矿安全技术培训中心) | Goaf gas transport and coal spontaneous combustion heat transfer dynamic balance experimental device and method |
| CN113295769A (en) * | 2021-05-20 | 2021-08-24 | 山东科技大学 | Simulation device and method for testing acoustic-electric signal transmission characteristics of coal spontaneous combustion high-temperature abnormal region |
| WO2021253280A1 (en) * | 2020-06-17 | 2021-12-23 | 山东科技大学 | Test method for simulating spontaneous combustion in goaf region |
| CN114460260A (en) * | 2021-12-29 | 2022-05-10 | 淮北矿业股份有限公司 | Method for monitoring spontaneous combustion danger area of residual coal in gob of fully mechanized caving mining face |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU610970B2 (en) * | 1988-02-08 | 1991-05-30 | General Signal Corporation | Calorimetry system |
| SU1749476A1 (en) * | 1990-02-13 | 1992-07-23 | Всесоюзный научно-исследовательский институт горноспасательного дела | Method for fighting of spontaneous fires in coal mine goafs |
| CN105954459A (en) * | 2016-04-27 | 2016-09-21 | 河南理工大学 | Device for detecting influence of coal mine goaf gas drainage on coal spontaneous combustion |
| CN105973935A (en) * | 2016-04-27 | 2016-09-28 | 重庆大学 | Test device of influence of space and multi-component gas on coal spontaneous combustion tendency |
| CN108333291A (en) * | 2018-02-01 | 2018-07-27 | 山东科技大学 | A kind of experimental provision and test method of simulation spontaneous combustion in goaf |
-
2019
- 2019-01-06 CN CN201910009959.4A patent/CN109655575A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU610970B2 (en) * | 1988-02-08 | 1991-05-30 | General Signal Corporation | Calorimetry system |
| SU1749476A1 (en) * | 1990-02-13 | 1992-07-23 | Всесоюзный научно-исследовательский институт горноспасательного дела | Method for fighting of spontaneous fires in coal mine goafs |
| CN105954459A (en) * | 2016-04-27 | 2016-09-21 | 河南理工大学 | Device for detecting influence of coal mine goaf gas drainage on coal spontaneous combustion |
| CN105973935A (en) * | 2016-04-27 | 2016-09-28 | 重庆大学 | Test device of influence of space and multi-component gas on coal spontaneous combustion tendency |
| CN108333291A (en) * | 2018-02-01 | 2018-07-27 | 山东科技大学 | A kind of experimental provision and test method of simulation spontaneous combustion in goaf |
Cited By (9)
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|---|---|---|---|---|
| CN110687149A (en) * | 2019-09-02 | 2020-01-14 | 中国地质大学（北京） | Underground coal field fire area typical product dynamic precipitation and release simulation experiment system |
| WO2021042632A1 (en) * | 2019-09-06 | 2021-03-11 | 山东科技大学 | Plane movement deformation measurement system and use thereof in two-dimensional similar simulation experiment |
| CN110886618A (en) * | 2019-12-10 | 2020-03-17 | 阜新新纪煤矿科技所 | Working face goaf vertical spontaneous combustion three-zone test method and fire prevention technology |
| CN111504368A (en) * | 2020-04-15 | 2020-08-07 | 河南理工大学 | Three-zone partitioning and experimental method for spontaneous combustion of coal in goaf under high stress condition |
| WO2021253280A1 (en) * | 2020-06-17 | 2021-12-23 | 山东科技大学 | Test method for simulating spontaneous combustion in goaf region |
| CN113063820A (en) * | 2021-03-29 | 2021-07-02 | 华北科技学院(中国煤矿安全技术培训中心) | Goaf gas transport and coal spontaneous combustion heat transfer dynamic balance experimental device and method |
| CN113295769A (en) * | 2021-05-20 | 2021-08-24 | 山东科技大学 | Simulation device and method for testing acoustic-electric signal transmission characteristics of coal spontaneous combustion high-temperature abnormal region |
| CN113295769B (en) * | 2021-05-20 | 2023-05-30 | 山东科技大学 | Simulation device and method for testing acoustic-electric signal transmission characteristics of coal spontaneous combustion high-temperature abnormal region |
| CN114460260A (en) * | 2021-12-29 | 2022-05-10 | 淮北矿业股份有限公司 | Method for monitoring spontaneous combustion danger area of residual coal in gob of fully mechanized caving mining face |
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