CN114112558B - Goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system - Google Patents
Goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system Download PDFInfo
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- CN114112558B CN114112558B CN202111445699.9A CN202111445699A CN114112558B CN 114112558 B CN114112558 B CN 114112558B CN 202111445699 A CN202111445699 A CN 202111445699A CN 114112558 B CN114112558 B CN 114112558B
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- 238000005070 sampling Methods 0.000 title claims abstract description 90
- 239000003245 coal Substances 0.000 title claims abstract description 78
- 230000002269 spontaneous effect Effects 0.000 title claims abstract description 52
- 230000002265 prevention Effects 0.000 title claims abstract description 51
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 50
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 133
- 239000007789 gas Substances 0.000 claims abstract description 81
- 230000007246 mechanism Effects 0.000 claims abstract description 67
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 67
- 238000002347 injection Methods 0.000 claims abstract description 56
- 239000007924 injection Substances 0.000 claims abstract description 56
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 44
- 239000010959 steel Substances 0.000 claims abstract description 44
- 238000012544 monitoring process Methods 0.000 claims abstract description 39
- 238000011010 flushing procedure Methods 0.000 claims abstract description 33
- 238000009412 basement excavation Methods 0.000 claims abstract description 7
- 238000009423 ventilation Methods 0.000 claims description 18
- 238000001179 sorption measurement Methods 0.000 claims description 12
- 238000011161 development Methods 0.000 claims description 9
- 230000018109 developmental process Effects 0.000 claims description 9
- 238000000605 extraction Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 4
- 230000033001 locomotion Effects 0.000 abstract description 3
- 238000005086 pumping Methods 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 description 9
- 238000007254 oxidation reaction Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000005065 mining Methods 0.000 description 6
- 239000002699 waste material Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000014075 nitrogen utilization Effects 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 230000000740 bleeding effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 238000009838 combustion analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Biochemistry (AREA)
- Immunology (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Molecular Biology (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Pathology (AREA)
- Biomedical Technology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses a goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system which comprises two groups of gas sampling prevention and control devices which extend into a goaf along the extending directions of a coal seam air inlet roadway and a coal seam air return roadway respectively, wherein the gas sampling prevention and control devices comprise an intrinsic safety type monitoring host, a gas sampling mechanism, a flushing mechanism, a nitrogen injection mechanism and steel pipes distributed along the length direction of coal seam excavation, a sliding mechanism is arranged in each steel pipe, and a first winch and a second winch are connected to two ends of each sliding mechanism. The utility model has novel and reasonable design and strong practicability, realizes the circulation dynamic monitoring of the gas sampling mechanism in the goaf through the pumping beam pipe by the first winch and the second winch on the circulating movement of the sliding mechanism in the steel pipeline, improves the spontaneous combustion prevention and control efficiency of the goaf coal, can accurately inject nitrogen into the spontaneous combustion early warning risk area for the first time through the nitrogen injection mechanism, prevents and controls fire, and is convenient for popularization and use.
Description
Technical Field
The utility model belongs to the technical field of spontaneous combustion prevention and control of goaf coal, and particularly relates to an intelligent dynamic circulating gas sampling prevention and control system for spontaneous combustion of goaf coal.
Background
Coal is the most important energy source in China at present, and the coal reserves in China are quite abundant. About 75% of industrial fuels and power in China, 60% of chemical raw materials and most of civil fuels depend on coal, and the exploitation and utilization of coal plays an important role in the development of China.
The harm of spontaneous ignition and ignition of coal is huge. The method not only can lead the fire in disaster areas to be diffused by the smoke and fire over the years and months, seriously worsen the ecological environment, but also can cause huge waste of coal resources, become an important source of earth atmospheric pollution, cause the spontaneous combustion of coal to be very complex, and put out the difficulty to be very difficult, because the spontaneous combustion high temperature point of the residual coal in the goaf moves in underground hidden space, people can not directly observe, various combustible and explosive gases are generated by spontaneous combustion of the coal in the goaf, and serious secondary disasters such as gas explosion and the like are extremely likely to be caused in the spontaneous combustion process of the coal.
In the present stage, the common goaf coal spontaneous combustion prevention and control technology in coal mines in China means that beam tube sampling is arranged in a specified gas sampling area, and meanwhile, nitrogen injection pipelines are arranged, namely, the beam tube and the nitrogen injection pipelines are required to be arranged for many times in the specified gas sampling area along with the advancement of a working face; however, according to the coal spontaneous combustion prevention and control technology in the designated area of the goaf, gas sampling cannot be carried out dynamically in real time during beam tube sampling, and the timeliness and the spatial continuity of the gas sampling cannot be achieved, so that the coal spontaneous combustion prevention and control efficiency of the goaf is affected, and the coal spontaneous combustion potential risk is increased; the nitrogen injection prevention and control can not be accurately performed on the goaf coal spontaneous combustion early warning area, the nitrogen injection inerting efficiency can be seriously affected by the nitrogen injection in a large area, so that nitrogen resource waste is caused, the bundle pipe and the nitrogen injection pipeline can not be recycled for multiple times, the labor burden of workers is increased, and the material waste is also caused.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides the intelligent dynamic circulating gas sampling prevention and control system for spontaneous combustion of the coal in the goaf, which is novel and reasonable in design and high in practicability, the first winch and the second winch circularly move the sliding mechanism in the steel pipeline, the gas sampling mechanism circularly and dynamically monitors the goaf through the pumping beam tube, timeliness and spatial continuity of gas sampling are ensured, the spontaneous combustion prevention and control efficiency of the coal in the goaf is improved, the precise nitrogen injection prevention and control fire extinguishing can be performed on the spontaneous combustion early warning risk area of the coal through the nitrogen injection mechanism for the first time, the nitrogen utilization rate is improved, the device does not need to manually perform repeated pipe burying, labor burden of workers is reduced, material waste is reduced, and the device is convenient to popularize and use.
In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a goaf coal spontaneous combustion intelligence developments circulation gas sampling prevention and control system which characterized in that: the gas sampling prevention and control device comprises a protection box body arranged at the goaf position, a steel pipe arranged along the length direction of coal seam excavation and connected with the protection box body, and a first winch arranged outside one end of the steel pipe far away from the goaf and positioned in a communication roadway, wherein the second winch is arranged in the protection box body; the steel pipeline is internally provided with a sliding mechanism and comprises a plurality of ventilation pipes, a plurality of ventilation holes are formed in the ventilation pipes, and two adjacent ventilation pipes are connected through a connecting pipe; the sliding mechanism comprises a central connecting shaft, a first piston type plug and a second piston type plug which are respectively arranged at two sides of the central connecting shaft, wherein the first piston type plug and the second piston type plug are fixed on the central connecting shaft through two galvanized gaskets, the first piston type plug, the second piston type plug and the vent pipe are matched to form a sampling cavity, one end of the central connecting shaft extending out of the first piston type plug is connected with a first steel wire rope on a first winch, one end of the central connecting shaft extending out of the second piston type plug is connected with a second steel wire rope on a second winch, an air extraction beam pipe, a flushing pipe and a nitrogen injection pipe are respectively arranged on the first piston type plug in a penetrating manner, one end of the air extraction beam pipe, which is positioned in the sampling cavity, is provided with a filter pipe, one end of the air extraction beam pipe, which is far away from the sampling cavity, is connected with a gas sampling mechanism, one end of the flushing pipe, which is positioned in the sampling cavity, is directed towards the filter pipe, is connected with the flushing mechanism, one end of the flushing pipe, which is far away from the sampling cavity, is positioned in the nitrogen injection roadway, is connected with the sampling mechanism, and one end, which is positioned in the nitrogen injection roadway; the communication roadway is internally provided with an intrinsic safety type monitoring host and three double-caterpillar-band tractors which are respectively used for an air suction beam pipe, a flushing pipe and a nitrogen injection pipe, and the three double-caterpillar-band tractors are controlled by the intrinsic safety type monitoring host.
Foretell a goaf coal spontaneous combustion intelligence developments circulation gas sampling prevention and control system, its characterized in that: the length of the connecting pipe is 1 m-5 m.
Foretell a goaf coal spontaneous combustion intelligence developments circulation gas sampling prevention and control system, its characterized in that: the first winding machine is provided with a length measuring sensor for monitoring the winding length of the first steel wire rope, and the length measuring sensor is connected with the intrinsic safety type monitoring host.
Foretell a goaf coal spontaneous combustion intelligence developments circulation gas sampling prevention and control system, its characterized in that: the gas sampling mechanism comprises a suction pump connected with the suction beam tube, a gas flow sensor is arranged at the suction end of the suction pump, an adsorption dryer is connected at the gas transmission end of the suction pump, and the adsorption dryer is connected with an intrinsic safety type multi-parameter sensor; the flushing mechanism comprises a high-pressure water pump connected with a flushing pipe; the nitrogen injection mechanism comprises a nitrogen injection machine connected with a nitrogen injection pipe, and the nitrogen injection machine is connected with a nitrogen making machine.
Foretell a goaf coal spontaneous combustion intelligence developments circulation gas sampling prevention and control system, its characterized in that: the gas flow sensor and the intrinsic safety type multi-parameter sensor are connected with an intrinsic safety type monitoring host.
Foretell a goaf coal spontaneous combustion intelligence developments circulation gas sampling prevention and control system, its characterized in that: the first winch, the second winch, the air pump, the adsorption dryer, the high-pressure water pump, the nitrogen injection machine and the nitrogen making machine are controlled by the intrinsic safety type monitoring host.
Compared with the prior art, the utility model has the following advantages:
1. according to the utility model, the first winch and the second winch circularly move the sliding mechanism in the steel pipeline, so that the gas sampling mechanism circularly and dynamically monitors the goaf through the air extraction beam tube, the timeliness and the spatial continuity of gas sampling are ensured, the spontaneous combustion prevention and control efficiency of the goaf coal is improved, the precise nitrogen injection prevention and control fire extinguishment can be performed on the spontaneous combustion early warning risk area of the coal at the first time through the nitrogen injection mechanism, the nitrogen utilization rate is improved, and the goaf coal spontaneous combustion prevention and control fire extinguishing device is convenient to popularize and use.
2. According to the utility model, the gas sampling state can be monitored in real time by utilizing the gas flow sensor arranged on the air pump, and when the gas sampling state is abnormal, the flushing mechanism flushes the filter pipe through the flushing nozzle, so that the device is reliable and stable, and the using effect is good.
3. The utility model has novel and reasonable design, utilizes the intrinsic safety type monitoring host to control the operation of the whole device, and the device is only required to be arranged once, does not need manual treatment in the follow-up process, has intelligent and circular dynamic gas sampling and nitrogen injection prevention and control processes, reduces labor and welfare of workers, reduces material waste and is convenient to popularize and use.
In conclusion, the device is novel and reasonable in design and high in practicability, the first winch and the second winch are used for circularly moving the sliding mechanism in the steel pipeline, the gas sampling mechanism is used for circularly and dynamically monitoring the gas sampling mechanism in the goaf through the gas extraction beam pipe, timeliness and spatial continuity of gas sampling are guaranteed, the spontaneous combustion prevention and control efficiency of coal in the goaf is improved, accurate nitrogen injection prevention and control fire extinguishing can be performed on a spontaneous combustion early warning risk area at the first time, the nitrogen utilization rate is improved, the device does not need to be used for burying pipes for many times manually, labor burden of workers is reduced, material waste is reduced, and popularization and use are facilitated.
The technical scheme of the utility model is further described in detail through the attached drawings and the embodiments.
Drawings
FIG. 1 is a schematic diagram of the usage state of the intelligent dynamic circulating gas sampling prevention and control system for spontaneous combustion of goaf coal.
Fig. 2 is an enlarged schematic view at a of fig. 1.
Fig. 3 is a schematic view of section C-C of fig. 2.
Fig. 4 is an enlarged schematic view at B of fig. 1.
Fig. 5 is a schematic block diagram of a circuit of the goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system of the utility model.
FIG. 6 is a schematic diagram showing the use state of the sliding mechanism of the intelligent dynamic cycle gas sampling prevention and control system for spontaneous combustion of goaf coal in a steel pipeline.
Fig. 7 is a schematic diagram of the ventilation pipe structure of the goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system.
FIG. 8 is a schematic diagram of a connecting pipe structure of the goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system.
Reference numerals illustrate:
1-goaf; 2-coal seam air inlet lane; 3-coal seam return air drift;
4-an intrinsic safety type monitoring host; 5-steel pipes; 5-1-ventilation tube;
5-2-connecting pipes; 5-3-ventilation holes; 6-a first winch;
6-1, a first steel wire rope; 6-2, a length measuring sensor; 7-a second winch;
7-1-second steel wire rope; 8-piston plug; 9-piston plug number two;
10-galvanising a shim; 11-a central connecting shaft; 12-intrinsic safety type multiparameter sensor;
13-an adsorption dryer; 14-an air pump; 14-1-pumping beam tube
14-2-a filter tube; 14-3, a gas flow sensor 15-a high-pressure water pump;
15-1, a water flushing pipe; 15-2, a flushing nozzle; 16-a nitrogen making machine;
17-nitrogen injection machine; 17-1, nitrogen injection pipe; 18-double crawler;
19-protecting the box body; 20-connecting roadway.
Detailed Description
As shown in fig. 1 to 8, the gas sampling prevention and control device comprises two groups of gas sampling prevention and control devices which extend into a goaf 1 along the extending directions of a coal seam air inlet roadway 2 and a coal seam return air roadway 3 respectively, wherein the gas sampling prevention and control device comprises a protection box 19 arranged at the position of the goaf 1, a steel pipe 5 which is arranged along the length direction of coal seam excavation and is connected with the protection box 19, and a first winch 6 which is arranged outside one end, far away from the goaf, of the steel pipe 5 and is positioned in a connecting roadway 20, and a second winch 7 is arranged in the protection box 19; a sliding mechanism is arranged in the steel pipeline 5, the steel pipeline 5 comprises a plurality of ventilation pipes 5-1, a plurality of ventilation holes 5-3 are formed in the ventilation pipes 5-1, and two adjacent ventilation pipes 5-1 are connected through a connecting pipe 5-2; the sliding mechanism comprises a central connecting shaft 11, a first piston type plug 8 and a second piston type plug 9 which are respectively arranged at two sides of the central connecting shaft 11, wherein the first piston type plug 8 and the second piston type plug 9 are respectively fixed on the central connecting shaft 11 through two galvanized gaskets 10, one end of the first piston type plug 8, the second piston type plug 9 and a vent pipe 5-1 are matched to form a sampling cavity, one end of the central connecting shaft 11 extending out of the first piston type plug 8 is connected with a first steel wire rope 6-1 on a first winch 6, one end of the central connecting shaft 11 extending out of the second piston type plug 9 is connected with a second steel wire rope 7-1 on a second winch 7, one end of the first piston type plug 8 is respectively provided with a penetrating beam tube 14-1, a flushing tube 15-1 and a nitrogen injection tube 17-1, one end of the penetrating beam tube 14-1, which is positioned in the sampling cavity, is connected with a gas sampling mechanism, one end of the penetrating beam tube 14-1, which is positioned in the sampling cavity, is far away from the sampling cavity, is connected with a gas mechanism, one end of the gas sampling mechanism, which is positioned in the flushing tube 15-1, is positioned in the sampling cavity 20, and one end of the flushing tube is positioned in the sampling cavity, far away from the flushing tube 20, the sampling mechanism, the one end of the flushing tube 15-1 is connected with the flushing mechanism, which is positioned in the end of the sampling mechanism, far from the sampling cavity is far from the end is far from the sampling cavity; the communication roadway 20 is also internally provided with an intrinsic safety type monitoring host 4 and three double caterpillar tractors 18 which are respectively used for the air suction beam tube 14-1, the flushing tube 15-1 and the nitrogen injection tube 17-1, and the three double caterpillar tractors 18 are controlled by the intrinsic safety type monitoring host 4.
It should be noted that, through the mutual cooperation of hoist 6 and hoist 7 No. two, can realize that slide mechanism circulates back and forth movement in steel pipe 5, through piston plug 8 No. two, piston plug 9 No. two and ventilation pipe 5-1 cooperation form the sampling cavity, make gas sampling mechanism carry out the gas sampling in the sampling cavity, thereby realize gas sampling mechanism is through the circulation dynamic monitoring of the beam tube 14-1 of bleeding in goaf 1, guarantee the timeliness and the continuity in space of gas sampling in time, improve goaf coal spontaneous combustion prevention and control efficiency, when gas sampling parameter of gas sampling mechanism reaches the spontaneous combustion early warning of coal, through the nitrogen injection mechanism that sets up, can carry out nitrogen injection prevention and control in the first time, improve nitrogen utilization ratio, with setting up flushing mechanism, can be through flushing shower nozzle 15-2 to the filter tube 14-2 of gas sampling, prevent to influence gas because of coal ash blocks up filter tube 14-2, carry out in the motion in the beam tube 14-1 of bleeding, beam tube 1 through setting up three dual tractors 18, 14-1 of nitrogen injection tube 17-1 respectively.
In this embodiment, the length of the connecting pipe 5-2 is 1 m-5 m.
In this embodiment, the first winding machine 6 is provided with a length measuring sensor 6-2 for monitoring the winding length of the first wire rope 6-1, and the length measuring sensor 6-2 is connected with the intrinsic safety type monitoring host 4.
In this embodiment, the gas sampling mechanism includes a suction pump 14 connected to a suction beam tube 14-1, a gas flow sensor 14-3 is disposed at a suction end of the suction pump 14, an adsorption dryer 13 is connected to a gas delivery end of the suction pump 14, and the adsorption dryer 13 is connected to an intrinsic safety type multi-parameter sensor 12; the flushing mechanism comprises a high-pressure water pump 15 connected with a flushing pipe 15-1; the nitrogen injection mechanism comprises a nitrogen injection machine 17 connected with a nitrogen injection pipe 17-1, and the nitrogen injection machine 17 is connected with a nitrogen making machine 16.
In this embodiment, a goaf coal spontaneous combustion intelligence developments circulation gas sampling prevention and control device, its characterized in that: the gas flow sensor 14-3 and the intrinsic safety type multi-parameter sensor 12 are connected with the intrinsic safety type monitoring host 4.
In this embodiment, the first winch 6, the second winch 7, the air pump 14, the adsorption dryer 13, the high-pressure water pump 15, the nitrogen injection machine 17 and the nitrogen generator 16 are all controlled by the intrinsic safety type monitoring host 4.
When the utility model is used, the method mainly comprises the following steps:
when the utility model is used, the method mainly comprises the following steps:
step one, setting an initialization position of a sliding mechanism in a steel pipeline: dividing three goaf bands according to oxygen concentration, and setting the initial position of a sliding mechanism in the steel pipeline 1 at the critical positions of an oxidation band and a choking band of the goaf 1;
step two, starting an operation gas sampling prevention and control device: the intrinsic safety type monitoring host 4 controls the opening of the first winch 6 and the second winch 7, the first winch 6 rolls up the first steel wire rope 6-1 to drive the sliding mechanism to move along the coal seam mining forward direction, the second winch 7 lifts the second steel wire rope 7-1, meanwhile, the intrinsic safety type monitoring host 4 controls the opening of the three double-crawler tractors 18, the three double-crawler tractors 18 respectively conduct drawing and sucking the air beam tube 14-1, the flushing tube 15-1 and the nitrogen injection tube 17-1, the length of the first steel wire rope 6-1 is measured by utilizing the length measuring sensor 6-2 on the first winch 6, when the length of the first steel wire rope 6-1 rolls up to be the length of one connecting tube 5-2, the sliding mechanism is indicated to move to the position of the first gas permeability tube 5-1, the intrinsic safety type monitoring host 4 closes the first winch 6, the second winch 7 and the three double-crawler tractors 18, and the step three double-crawler tractors 18 are executed, wherein the coal seam mining forward direction refers to the coal seam mining direction;
step three, judging whether the sliding mechanism is positioned in the oxidation zone area or not: the intrinsic safety type monitoring host 4 controls the air pump 14 to be started, the air sampling is carried out in the sampling cavity through the air suction beam tube 14-1, the collected air sample enters the adsorption type dryer 13 through the air pump 14, the air sample is conveyed to the intrinsic safety type multi-parameter sensor 12 for detection after the adsorption type dryer 13 finishes drying, the intrinsic safety type monitoring host 4 judges whether the sliding mechanism is positioned in an oxidation zone area according to the oxygen concentration in the air sample detection result of the intrinsic safety type multi-parameter sensor 12, if the sliding mechanism is positioned in the oxidation zone area, the fourth step is executed, and if the sliding mechanism is not positioned in the oxidation zone area, the fifth step is executed;
step four, early warning judgment of nitrogen injection in spontaneous combustion analysis of coal: the intrinsic safety type monitoring host 4 analyzes and judges whether the spontaneous combustion early warning condition of the coal is reached according to the gas concentration parameters of oxygen, carbon monoxide, methane and the like in the gas sample detection result of the intrinsic safety type multi-parameter sensor 12, if the spontaneous combustion early warning condition of the coal is reached, the nitrogen injection prevention and control early warning is carried out, the intrinsic safety type monitoring host 4 controls the opening of the nitrogen making machine 16 and the nitrogen injection machine 17, nitrogen injection is carried out through the nitrogen injection pipe 17-1, and meanwhile the intrinsic safety type monitoring host 4 sends out early warning; if the coal spontaneous combustion early warning condition is not met, executing a step five;
fifthly, the sliding mechanism moves to the next ventilation pipe along the positive direction of coal seam excavation: the intrinsic safety type monitoring host 4 controls the opening of the first winch 6 and the second winch 7, the first winch 6 rolls up the first steel wire rope 6-1 to drive the sliding mechanism to move along the coal seam mining forward direction, the second winch 7 lifts the second steel wire rope 7-1, meanwhile, the intrinsic safety type monitoring host 4 controls the opening of the three double-caterpillar-band tractors 18, the three double-caterpillar-band tractors 18 respectively conduct drawing and exhausting beam tubes 14-1, flushing tubes 15-1 and nitrogen injection tubes 17-1, the length of the first steel wire rope 6-1 is measured by utilizing a length measuring sensor 6-2 on the first winch 6, when the length of the first steel wire rope 6-1 rolls up to be the length of one connecting tube 5-2, the sliding mechanism is indicated to move to the position of the next gas permeability tube 5-1, and the intrinsic safety type monitoring host 4 closes the first winch (6), the second winch 7 and the three double-caterpillar-band tractors 18 to execute the step six;
step six, judging whether the sliding mechanism is positioned in the oxidation zone area according to the method in the step three: if the area is the oxidized area, executing the fourth step, and if the area is not the oxidized area, executing the seventh step;
seventh, the sliding mechanism moves to the next ventilation pipe along the coal seam excavation reverse direction: the intrinsic safety type monitoring host 4 controls the first winch 6 and the second winch 7 to be started, the second winch 7 rolls up the second steel wire rope 7-1 to pull the sliding mechanism to move along the coal seam mining opposite direction, the first winch 6 lifts the first steel wire rope 6-1, the lifting length of the first steel wire rope 6-1 is measured by the length measuring sensor 6-2 on the first winch 6, when the lifting length of the first steel wire rope 6-1 is the length of one connecting pipe 5-2, the sliding mechanism is indicated to slide to the position of the next vent pipe 5-1, the intrinsic safety type monitoring host 4 closes the first winch 6 and the second winch 7, and the eighth step is executed, wherein the coal seam opposite direction refers to the coal seam mining opposite direction;
step eight, judging whether the sliding mechanism is positioned in the oxidation zone area according to the method in the step three: if the area is the oxidation zone area, executing the step nine, and if the area is not the oxidation zone area, executing the step five;
step nine, judging the spontaneous combustion and nitrogen injection early warning of the coal according to the method in the step four: if the coal spontaneous combustion early warning condition is met, nitrogen injection prevention and control early warning is carried out, the intrinsic safety type monitoring host 4 controls the nitrogen making machine 16 and the nitrogen injection machine 17 to be started, nitrogen injection is carried out through the nitrogen injection pipe 17-1, and meanwhile the intrinsic safety type monitoring host 4 sends early warning; and if the coal spontaneous combustion early warning condition is not met, executing the step seven until the coal seam excavation is completed.
The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, and any simple modification, variation and equivalent structural changes made to the above embodiment according to the technical substance of the present utility model still fall within the scope of the technical solution of the present utility model.
Claims (6)
1. The utility model provides a goaf coal spontaneous combustion intelligence developments circulation gas sampling prevention and control system which characterized in that: the gas sampling prevention and control device comprises two groups of gas sampling prevention and control devices which extend into a goaf (1) along the extending direction of a coal seam air inlet roadway (2) and a coal seam return air roadway (3) respectively, wherein each gas sampling prevention and control device comprises a protection box body (19) arranged at the end position of the goaf (1), a steel pipe (5) which is arranged along the length direction of coal seam excavation and is connected with the protection box body (19), and a first winch (6) which is arranged outside one end of the steel pipe (5) far away from the goaf and is positioned in a connecting roadway (20), a second winch (7) is arranged in the protection box body (19), and a sliding mechanism is arranged in the steel pipe (5); the steel pipeline (5) comprises a plurality of ventilation pipes (5-1), a plurality of ventilation holes (5-3) are formed in the ventilation pipes (5-1), and two adjacent ventilation pipes (5-1) are connected through a connecting pipe (5-2); the sliding mechanism comprises a central connecting shaft (11), a first piston type plug (8) and a second piston type plug (9) which are respectively arranged at two sides of the central connecting shaft (11), wherein the first piston type plug (8) and the second piston type plug (9) are respectively fixed on the central connecting shaft (11) through two galvanized gaskets (10), the first piston type plug (8), the second piston type plug (9) and a vent pipe (5-1) are matched to form a sampling cavity, one end of the central connecting shaft (11) extends out of the first piston type plug (8) to be connected with a first steel wire rope (6-1) on a first winch (6), one end of the central connecting shaft (11) extends out of the second piston type plug (9) to be connected with a second steel wire rope (7-1) on a second winch (7), an air extraction beam tube (14-1), a flushing tube (15-1) and a nitrogen injection tube (17-1) are respectively arranged on the first piston type plug (8) in a penetrating mode, one end of the air extraction beam tube (14-1) is positioned in the filtering cavity, one end of the air extraction beam tube (14-1) is positioned in the sampling cavity and far away from the sampling cavity (20), one end of the flushing pipe (15-1) positioned in the sampling cavity is provided with a flushing nozzle (15-2) facing the filter pipe (14-2), one end of the flushing pipe (15-1) far away from the sampling cavity and positioned in the connecting roadway (20) is connected with a flushing mechanism, and one end of the nitrogen injection pipe (17-1) far away from the sampling cavity and positioned in the connecting roadway (20) is connected with a nitrogen injection mechanism; the communication roadway (20) is internally provided with an intrinsic safety type monitoring host machine (4) and three double caterpillar band retractors (18) which are respectively used for an air extraction beam tube (14-1), a flushing tube (15-1) and a nitrogen injection tube (17-1), and the three double caterpillar band retractors (18) are controlled by the intrinsic safety type monitoring host machine (4).
2. The goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system according to claim 1, wherein the system comprises the following components: the length of the connecting pipe (5-2) is 1 m-5 m.
3. The goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system according to claim 1, wherein the system comprises the following components: the first winding machine (6) is provided with a length measuring sensor (6-2) for monitoring the winding length of the first steel wire rope (6-1), and the length measuring sensor (6-2) is connected with an intrinsic safety type monitoring host (4).
4. The goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system according to claim 1, wherein the system comprises the following components: the gas sampling mechanism comprises a suction pump (14) connected with a suction beam tube (14-1), a gas flow sensor (14-3) is arranged at the suction end of the suction pump (14), an adsorption dryer (13) is connected at the gas transmission end of the suction pump (14), and an intrinsic safety type multi-parameter sensor (12) is connected with the adsorption dryer (13); the flushing mechanism comprises a high-pressure water pump (15) connected with a flushing pipe (15-1); the nitrogen injection mechanism comprises a nitrogen injection machine (17) connected with a nitrogen injection pipe (17-1), and the nitrogen injection machine (17) is connected with a nitrogen making machine (16).
5. The goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system according to claim 4, wherein the system comprises the following components: the gas flow sensor (14-3) and the intrinsic safety type multi-parameter sensor (12) are connected with the intrinsic safety type monitoring host (4).
6. The goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system according to claim 4, wherein the system comprises the following components: the first winch (6), the second winch (7), the air pump (14), the adsorption dryer (13), the high-pressure water pump (15), the nitrogen injection machine (17) and the nitrogen making machine (16) are controlled by the intrinsic safety type monitoring host machine (4).
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