CN113063715A - Goaf carbon dioxide regulation and control experiment system and method - Google Patents
Goaf carbon dioxide regulation and control experiment system and method Download PDFInfo
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- CN113063715A CN113063715A CN202110332734.XA CN202110332734A CN113063715A CN 113063715 A CN113063715 A CN 113063715A CN 202110332734 A CN202110332734 A CN 202110332734A CN 113063715 A CN113063715 A CN 113063715A
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 342
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 171
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 171
- 230000033228 biological regulation Effects 0.000 title claims abstract description 25
- 238000002474 experimental method Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims description 16
- 230000010412 perfusion Effects 0.000 claims abstract description 28
- 238000012544 monitoring process Methods 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 238000013508 migration Methods 0.000 claims abstract description 10
- 230000005012 migration Effects 0.000 claims abstract description 10
- 238000012545 processing Methods 0.000 claims abstract description 9
- 239000003245 coal Substances 0.000 claims description 29
- 238000001179 sorption measurement Methods 0.000 claims description 11
- 230000035699 permeability Effects 0.000 claims description 9
- 239000000284 extract Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 18
- 238000002485 combustion reaction Methods 0.000 description 8
- 230000002269 spontaneous effect Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 206010003497 Asphyxia Diseases 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 230000000803 paradoxical effect Effects 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/0866—Sorption
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Abstract
The invention relates to the technical field of a goaf carbon dioxide regulation and control system, and discloses a goaf carbon dioxide regulation and control experimental system and a goaf carbon dioxide regulation and control experimental method, which comprise the following steps: the system comprises a general control computer, an inerting parameter prediction subsystem, a carbon dioxide perfusion subsystem, a carbon dioxide detection part, and a monitoring system, wherein the general control computer is used for inputting various parameters in the goaf, the inerting parameter prediction subsystem is used for predicting to obtain the carbon dioxide concentration of each part in the goaf as a reference value and predicting the carbon dioxide migration rule, the carbon dioxide perfusion subsystem is used for perfusing carbon dioxide into the goaf, the carbon dioxide detection part is arranged in the goaf, and the carbon dioxide monitoring subsystem is used for processing the actual carbon dioxide concentration and transmitting the processing result to the inerting parameter prediction subsystem to be compared with the reference value. The invention can realize the automatic detection of the perfusion safety performance and the automatic control of the perfusion quantity.
Description
Technical Field
The invention relates to the technical field of a goaf carbon dioxide regulation and control system, in particular to a goaf carbon dioxide regulation and control experiment system and a goaf carbon dioxide regulation and control experiment method.
Background
The coal spontaneous combustion disaster in the goaf is the result of the comprehensive action of continuous oxygen supply, residual coal heat storage and heat accumulation of the goaf air flow field, when the heat released by the coal oxidation reaction is larger than the heat dissipated to the surrounding environment, the heat accumulation raises the temperature of the coal, otherwise, the temperature of the coal cannot be raised. When the accumulated heat raises the temperature of the coal to the critical temperature and continues to rise, spontaneous combustion of the coal body can be caused finally. Therefore, the coal spontaneous combustion process is essentially the process of development of paradoxical movement of heat generation and environmental heat dissipation under the action of coal oxidation.
According to the coal oxidation spontaneous combustion theory, spontaneous combustion of coal in a goaf must simultaneously have three conditions: firstly, coal or gangue with spontaneous combustion tendency is in a broken state; ventilation and oxygen supply are carried out, and the oxidation process of the coal is maintained to be continuously developed; and a large amount of heat generated in the oxidation process of the coal is difficult to dissipate. The prevention and control technology for spontaneous combustion of various coals mainly focuses on the three aspects, and the currently common coal bed spontaneous combustion prevention and control technology mainly comprises the following types: inerting, leaking stoppage, cooling and the like, and the comprehensive application of the inerting, leaking stoppage, cooling and the like can play a role in preventing and extinguishing fire, and finally the aim of preventing and extinguishing fire is fulfilled.
Aiming at the open type goaf, the law of adsorption, diffusion and migration of the coal rock mass to the carbon dioxide in the goaf inerting process cannot be completely mastered, so that the problems of narrow inerting area, serious gas leakage phenomenon and poor control effect exist in the emergency process of the carbon dioxide inerting technology.
Disclosure of Invention
The invention provides a goaf carbon dioxide regulation and control experimental system and a goaf carbon dioxide regulation and control experimental method.
The invention provides a goaf carbon dioxide regulation and control experiment system, which comprises:
a coal sample is laid in the goaf;
the working surface is connected with the goaf, and a ventilating baffle is arranged between the working surface and the goaf;
the inerting parameter prediction subsystem is used for predicting the carbon dioxide adsorption rate of the coal sample in the goaf, the air permeability of the air permeable baffle and the carbon dioxide perfusion speed through fluent software to obtain the carbon dioxide concentration of each part in the goaf as a reference value and predicting the carbon dioxide migration rule;
the carbon dioxide perfusion subsystem is used for perfusing carbon dioxide gas into the goaf;
the carbon dioxide detection part is arranged in the goaf and is used for detecting the actual concentration of carbon dioxide in the goaf in real time;
the carbon dioxide monitoring subsystem is used for processing the actual concentration of the carbon dioxide and transmitting the processing result to the inerting parameter prediction subsystem to be compared with the reference value;
and the general control computer is used for inputting the carbon dioxide adsorption rate of the coal sample in the goaf, the air permeability of the air permeable baffle and the carbon dioxide filling speed, transmitting the data to the inerting parameter prediction subsystem and receiving the data transmitted back by the inerting parameter prediction subsystem.
Optionally, the carbon dioxide detection portion is a plurality of carbon dioxide sensors, and a plurality of carbon dioxide sensors set up respectively in the different positions in the collecting space area, and a plurality of carbon dioxide sensors are connected with carbon dioxide monitoring subsystem respectively to transmit the actual concentration of carbon dioxide of different positions department in the collecting space area to carbon dioxide monitoring subsystem.
Optionally, the carbon dioxide perfusion subsystem perfuses carbon dioxide gas into the goaf through the air inlet roadway.
Optionally, the system further comprises an air return lane, the air return lane is connected with the goaf, gas in the goaf can leak out of the air return lane, and the air return lane is communicated with the working face at the same time.
Optionally, the return airway is connected to the chromatograph.
Optionally, a flow valve is connected between the carbon dioxide detection part and the carbon dioxide perfusion subsystem.
The invention also provides a goaf carbon dioxide regulation and control method, which comprises the following steps:
s1: inputting the carbon dioxide adsorption rate of the coal sample in the goaf, the air permeability of the air permeable baffle and the carbon dioxide filling speed through a general control computer;
s2: the inerting parameter prediction subsystem receives the data in the S1, predicts the carbon dioxide concentration of each part in the goaf as a reference value through fluent software, and predicts the carbon dioxide migration rule;
s3: filling carbon dioxide gas into the goaf by using a carbon dioxide filling subsystem;
s4: monitoring the concentration of carbon dioxide in each part of the goaf in real time by using a carbon dioxide sensor;
s5: the carbon dioxide monitoring subsystem receives the carbon dioxide concentration in S4 and extracts the carbon dioxide concentration value of each fixed time node;
s6: and the inerting parameter prediction subsystem compares the data obtained in the step S5 with the reference value in the step S2, and feeds back the comparison result to the general control computer so as to regulate and control the perfusion parameters of the carbon dioxide perfusion subsystem.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, an open goaf carbon dioxide safety intelligent regulation and control model which is based on the combination of prediction advance and monitoring system is established by the inerting parameter prediction subsystem and is fed back to the inerting parameter prediction subsystem for comparison, and the filling system is controlled by a host computer to correct is adopted, so that a carbon dioxide filling safety performance index self-adaptive control experiment system is designed and developed, the action rule of filling parameter variation on safety inrush quantity is researched, and the automatic detection of filling safety performance and the automatic control and grasping of filling quantity are realized.
Drawings
Fig. 1 is a schematic structural diagram of a goaf carbon dioxide regulation experiment system according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a goaf carbon dioxide regulation and control method according to an embodiment of the present invention.
Description of reference numerals:
the method comprises the following steps of 1-a general control computer, 2-a carbon dioxide monitoring subsystem, 3-an inerting parameter prediction subsystem, 4-a carbon dioxide perfusion subsystem, 5-a flow valve, 6-a return airway, 7-a working face, 8-an air inlet airway, 9-a goaf, 10-a carbon dioxide sensor, 11-a chromatographic analyzer and 12-a gas permeable baffle.
Detailed Description
An embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the embodiment.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing technical solutions of the present invention and simplifying the description, but do not indicate or imply that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1, an experimental system for regulating and controlling carbon dioxide in a goaf provided in an embodiment of the present invention includes: the system comprises a general control computer 1, a carbon dioxide monitoring subsystem 2, an inerting parameter prediction subsystem 3, a carbon dioxide perfusion subsystem 4, a carbon dioxide detection part, a working face 7 and a goaf 9, wherein a coal sample is laid in the goaf 9, the working face 7 is connected with the goaf 9, a ventilating baffle 12 is arranged between the working face 7 and the goaf 9, the inerting parameter prediction subsystem 3 predicts the carbon dioxide concentration of each part in the goaf 9 as a reference value and predicts the carbon dioxide migration rule by using the carbon dioxide adsorption rate of the coal sample in the goaf 9, the ventilating rate of the ventilating baffle 12 and the perfusion speed of the carbon dioxide through fluent software, the carbon dioxide perfusion subsystem 4 is used for perfusing the carbon dioxide gas into the goaf 9, the carbon dioxide detection part is arranged in the goaf 9 and is used for detecting the actual carbon dioxide concentration in the goaf 9 in real time, and the carbon dioxide monitoring subsystem 2 is used, and the processing result is transmitted to the inerting parameter prediction subsystem 3 to be compared with a reference value, the general control computer 1 is used for inputting the carbon dioxide adsorption rate of the coal sample in the goaf 9, the air permeability of the air permeable baffle 12 and the carbon dioxide perfusion speed, transmitting the data to the inerting parameter prediction subsystem 3 and receiving the data transmitted back by the inerting parameter prediction subsystem 3, in the embodiment, the carbon dioxide monitoring subsystem 2 carries out processing, namely, the carbon dioxide concentration of each part detected by the carbon dioxide detection part is put together at intervals (such as five seconds), a goaf carbon dioxide concentration table in each time is listed, and the processing result is transmitted to the inerting parameter prediction subsystem 3 to be compared with the reference value.
According to the invention, an open goaf carbon dioxide safety intelligent regulation and control model which is based on the combination of prediction advance and monitoring system is established by the inerting parameter prediction subsystem for feedback and comparison, and the filling system is controlled by a host computer for correction, so that a carbon dioxide filling safety performance index self-adaptive control experiment system is designed and developed, the action rule of filling parameter variation on safety inrush quantity is researched, the automatic detection of filling safety performance and the automatic control and grasping of filling quantity are realized, and the problems of narrow inerting area, serious gas leakage phenomenon and poor control effect in the goaf carbon dioxide inerting technology using process can be solved by grasping the carbon dioxide migration rule.
Optionally, the carbon dioxide detection portion is a plurality of carbon dioxide sensors 10, and a plurality of carbon dioxide sensors 10 set up respectively in the different positions in collecting space 9, and a plurality of carbon dioxide sensors 10 are connected with carbon dioxide monitoring subsystem 2 respectively to transmit the actual concentration of carbon dioxide of different positions department in collecting space 9 to carbon dioxide monitoring subsystem 2 in.
Optionally, the carbon dioxide perfusion subsystem 4 perfuses carbon dioxide gas into the gob 9 through the air intake lane 8.
In this embodiment, a collecting space area carbon dioxide regulation and control experimental system still includes return airway 6, return airway 6 is connected with collecting space area 9, and the gas in collecting space area 9 can spill from return airway 6, and return airway 6 communicates with working face 7 simultaneously, and carbon dioxide gas pours into from the pipeline of air inlet airway 8, because collecting space area 9 and working face 7's gas baffle 12 are ventilative, so can cause the gas flow to lead to the change of gas concentration in collecting space area 9, and the gas in collecting space area 9 can leak from baffle 12, and this also is the reason that collecting space 9 gas takes place to flow.
High concentration carbon dioxide gushes into the working face and easily causes staff's poisoning suffocation, produce the secondary disaster, seriously restrict the development of inerting technique, consequently in this case, return airway 6 is connected with chromatographic analyzer 11, gaseous can follow return airway 6 outflow, chromatographic analyzer 11 connected at return airway 6 mouth can detect the carbon dioxide content of gushing out gas this moment, because return airway 6 and working face 7 communicate, namely the safe gush volume of working face 7, we confirm it and regard it as safe on certain value, thereby study the effect law of filling parameter variation to the safe gush volume.
Optionally, a flow valve 5 is connected between the carbon dioxide detection part and the carbon dioxide perfusion subsystem 4, the flow valve 5 is used for controlling the perfusion speed of carbon dioxide to be increased or decreased, and the flow valve 5 is controlled at any time by the general control computer 1 to control the perfusion volume.
The invention also provides a goaf carbon dioxide regulation and control method, which comprises the following steps:
s1: inputting the carbon dioxide adsorption rate of the coal sample in the goaf 9, the air permeability of the air-permeable baffle 12 and the carbon dioxide filling speed through the general control computer 1;
s2: the inerting parameter prediction subsystem 3 receives the data in the S1, predicts the carbon dioxide concentration of each part in the gob 9 through fluent software to be used as a reference value and predicts the carbon dioxide migration rule;
s3: filling carbon dioxide gas into the goaf 9 by using a carbon dioxide filling subsystem 4;
s4: monitoring the concentration of carbon dioxide in each part of the gob 9 in real time by using a carbon dioxide sensor 10;
s5: the carbon dioxide monitoring subsystem 2 receives the carbon dioxide concentration in S4 and extracts the carbon dioxide concentration value of each fixed time node;
s6: the inerting parameter prediction subsystem 3 compares the data obtained in S5 with the reference value in S2, and feeds back the comparison result to the general control computer 1 to regulate and control the perfusion parameters of the carbon dioxide perfusion subsystem 4.
The invention inputs the carbon dioxide adsorption rate of the coal sample in the goaf 9, the air permeability of the air baffle 12 and the carbon dioxide filling speed through the general control computer 1, controls the inerting parameter prediction subsystem 3 to predict the concentration and the migration rule of each part of the carbon dioxide in the goaf 9, then fills the carbon dioxide into the goaf 9 from the air inlet tunnel 8 through the carbon dioxide filling subsystem 4, detects the carbon dioxide concentration in the goaf 9 in real time by a carbon dioxide sensor arranged in the goaf 9, processes the measured data through the carbon dioxide monitoring subsystem, uploads the processed result to the inerting parameter prediction subsystem 3 to be compared with the initial predicted value, if the initial prediction is met, the carbon dioxide is continuously filled with the parameter, if the predicted value (the concentration is too high) is not met, the carbon dioxide filling subsystem 4 is controlled by the general control computer 1 to reduce the carbon dioxide filling amount, automatic adjustment is realized, and adaptive control of carbon dioxide is realized.
The above disclosure is only for a few specific embodiments of the present invention, however, the present invention is not limited to the above embodiments, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (7)
1. The utility model provides a collecting space area carbon dioxide regulation and control experimental system which characterized in that includes:
a goaf (9) in which a coal sample is laid;
the working surface (7) is connected with the goaf (9), and a ventilating baffle (12) is arranged between the working surface (7) and the goaf (9);
the inerting parameter prediction subsystem (3) is used for predicting the carbon dioxide adsorption rate of the coal sample in the goaf (9), the air permeability of the air permeable baffle (12) and the carbon dioxide perfusion speed through fluent software to obtain the carbon dioxide concentration of each part in the goaf (9) as reference values and predict the carbon dioxide migration rule;
the carbon dioxide perfusion subsystem (4) is used for perfusing carbon dioxide gas into the goaf (9);
the carbon dioxide detection part is arranged in the goaf (9) and is used for detecting the actual concentration of carbon dioxide in the goaf (9) in real time;
the carbon dioxide monitoring subsystem (2) is used for processing the actual concentration of the carbon dioxide and transmitting a processing result to the inerting parameter prediction subsystem (3) to be compared with the reference value;
and the general control computer (1) is used for inputting the carbon dioxide adsorption rate of the coal sample in the goaf (9), the air permeability of the air permeable baffle (12) and the carbon dioxide filling speed, transmitting data to the inerting parameter prediction subsystem (3) and receiving the data transmitted back by the inerting parameter prediction subsystem (3).
2. The goaf carbon dioxide regulation experiment system of claim 1, wherein the carbon dioxide detection portion is a plurality of carbon dioxide sensors (10), the plurality of carbon dioxide sensors (10) are respectively disposed at different positions within the goaf (9), and the plurality of carbon dioxide sensors (10) are respectively connected to the carbon dioxide monitoring subsystem (2) to transmit actual concentrations of carbon dioxide at different positions within the goaf (9) into the carbon dioxide monitoring subsystem (2).
3. The goaf carbon dioxide regulation experiment system of claim 1, wherein the carbon dioxide perfusion subsystem (4) perfuses carbon dioxide gas into the goaf (9) through an air intake (8).
4. The goaf carbon dioxide regulation experiment system of claim 1, further comprising a return airway (6), wherein the return airway (6) is connected to the goaf (9), gas in the goaf (9) can leak out of the return airway (6), and the return airway (6) is simultaneously communicated with the working surface (7).
5. The goaf carbon dioxide regulation experiment system of claim 4, wherein the return airway (6) is connected to a chromatographic analyzer (11).
6. The goaf carbon dioxide regulation experiment system of claim 1, wherein a flow valve (5) is connected between the carbon dioxide detection portion and the carbon dioxide perfusion subsystem (4).
7. A goaf carbon dioxide regulation and control method is characterized by comprising the following steps:
s1: inputting the carbon dioxide adsorption rate of the coal sample in the goaf (9), the air permeability of the air-permeable baffle (12) and the carbon dioxide perfusion speed by a general control computer (1);
s2: the inerting parameter prediction subsystem (3) receives the data in the S1, predicts the carbon dioxide concentration of each part in the goaf (9) through fluent software to be used as a reference value and predicts the carbon dioxide migration rule;
s3: carbon dioxide gas is filled into the goaf (9) by a carbon dioxide filling subsystem (4);
s4: monitoring the concentration of carbon dioxide in each part of the goaf (9) in real time by using a carbon dioxide sensor (10);
s5: the carbon dioxide monitoring subsystem (2) receives the carbon dioxide concentration in S4 and extracts the carbon dioxide concentration value of each fixed time node;
s6: and the inerting parameter prediction subsystem (3) compares the data obtained in S5 with the reference value in S2, and feeds back the comparison result to the general control computer (1) to regulate and control the perfusion parameters of the carbon dioxide perfusion subsystem (4).
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Application publication date: 20210702 |