CN114112558A - Collecting space area coal spontaneous combustion intelligence developments circulating gas sampling prevention and control system - Google Patents
Collecting space area coal spontaneous combustion intelligence developments circulating gas sampling prevention and control system Download PDFInfo
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- CN114112558A CN114112558A CN202111445699.9A CN202111445699A CN114112558A CN 114112558 A CN114112558 A CN 114112558A CN 202111445699 A CN202111445699 A CN 202111445699A CN 114112558 A CN114112558 A CN 114112558A
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- 238000005070 sampling Methods 0.000 title claims abstract description 83
- 239000003245 coal Substances 0.000 title claims abstract description 78
- 230000002265 prevention Effects 0.000 title claims abstract description 48
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 47
- 230000002269 spontaneous effect Effects 0.000 title claims abstract description 47
- 238000011161 development Methods 0.000 title claims description 6
- 230000018109 developmental process Effects 0.000 title claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 141
- 239000007789 gas Substances 0.000 claims abstract description 76
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 72
- 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 47
- 239000010959 steel Substances 0.000 claims abstract description 47
- 238000012544 monitoring process Methods 0.000 claims abstract description 39
- 238000011010 flushing procedure Methods 0.000 claims abstract description 34
- 238000009412 basement excavation Methods 0.000 claims abstract description 11
- 238000005086 pumping Methods 0.000 claims description 17
- 238000004891 communication Methods 0.000 claims description 13
- 238000001179 sorption measurement Methods 0.000 claims description 12
- 230000001681 protective effect Effects 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000001035 drying Methods 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 4
- 230000003647 oxidation Effects 0.000 description 13
- 238000007254 oxidation reaction Methods 0.000 description 13
- 239000002699 waste material Substances 0.000 description 6
- 238000004804 winding Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005065 mining Methods 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
- 238000000605 extraction Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 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
- 230000014075 nitrogen utilization Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 206010003497 Asphyxia Diseases 0.000 description 1
- 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
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 101150086005 gob-1 gene Proteins 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
- 239000000126 substance Substances 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
- 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
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- 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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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- Pathology (AREA)
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Abstract
The invention 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 respectively extend into a goaf along the extension directions of a coal bed air inlet lane and a coal bed air return lane, wherein each gas sampling prevention and control device comprises an intrinsic safety type monitoring host, a gas sampling mechanism, a flushing mechanism, a nitrogen injection mechanism and a steel pipe arranged along the length direction of coal bed 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 invention has novel and reasonable design and strong practicability, realizes the circulating dynamic monitoring of the gas sampling mechanism in the goaf through the exhaust beam pipe by the circulating movement of the slippage mechanism in the steel pipeline through the first winch and the second winch, improves the coal spontaneous combustion prevention and control efficiency of the goaf, can accurately inject nitrogen to prevent, control and extinguish fire in the coal spontaneous combustion early warning risk area at the first time through the nitrogen injection mechanism, and is convenient to popularize and use.
Description
Technical Field
The invention belongs to the technical field of goaf coal spontaneous combustion prevention and control, and particularly relates to a goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system.
Background
Coal is the most important energy in China at present, and the coal reserves in China are very rich. About 75% of industrial fuel and power in China, 60% of chemical raw materials and most of civil fuel depend on coal, and the mining and utilization of coal play an important role in the development of China.
The harm of spontaneous combustion of coal is very huge. The method not only enables fireworks in disaster areas to be diffused over the years and the ecological environment to be seriously deteriorated, but also causes huge waste of coal resources and becomes an important source of earth atmospheric pollution, so that the causes of coal spontaneous combustion are very complex, and the extinguishing difficulty is very difficult.
In the present stage, the common goaf coal spontaneous combustion prevention and control technology of China coal mines is to arrange a beam tube for sampling in a specified gas sampling area and arrange a nitrogen injection pipeline at the same time, namely, the beam tube and the nitrogen injection pipeline are required to be arranged for multiple times in the specified gas sampling area along with the advance of a working surface; however, according to the coal spontaneous combustion prevention and control technology in the designated area of the goaf, gas sampling cannot be dynamically carried out in real time during beam tube sampling, and the gas sampling cannot reach the timeliness and the continuity in space in time, so that the coal spontaneous combustion prevention and control efficiency of the goaf is influenced, and the potential risk of coal spontaneous combustion is increased; the goaf coal spontaneous combustion early warning area can not be accurately controlled during nitrogen injection prevention and control, nitrogen injection in a large area can seriously affect nitrogen injection inerting efficiency, nitrogen resource waste is caused, a bundle pipe and a nitrogen injection pipeline are arranged for multiple times and cannot be recycled, labor burden of workers is increased, and material waste is also caused.
Disclosure of Invention
The invention aims to solve the technical problems that the defects in the prior art are overcome, and the intelligent dynamic circulating gas sampling prevention and control system for coal spontaneous combustion in the goaf is provided, is novel and reasonable in design and strong in practicability, realizes the circulating dynamic monitoring of the gas sampling mechanism in the goaf through the air exhaust beam pipe by the aid of the first winch and the second winch in the circulating movement of the sliding mechanism in the steel pipeline, ensures the timeliness and the spatial continuity of gas sampling in time, improves the coal spontaneous combustion prevention and control efficiency of the goaf, can accurately inject nitrogen to prevent, control and extinguish the fire in a coal spontaneous combustion early warning risk area at the first time through the nitrogen injection mechanism, improves the utilization rate of nitrogen, does not need manual multiple pipe burying, reduces labor burden of workers, reduces material waste, and is convenient to popularize and use.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a collecting space area coal spontaneous combustion intelligence developments circulating gas sampling prevention and control system which characterized in that: the device comprises two groups of gas sampling prevention and control devices which respectively extend into a goaf along the extension directions of a coal bed air inlet lane and a coal bed air return lane, wherein each gas sampling prevention and control device comprises a protective box body arranged at the position of the goaf, a steel pipeline which is arranged along the length direction of coal bed excavation and is connected with the protective box body, and a first winch which is arranged at the outer side of one end, far away from the goaf, of the steel pipeline and is positioned in a connection roadway, and a second winch is arranged in the protective box body; a sliding mechanism is arranged in the steel pipeline, the steel pipeline comprises a plurality of vent pipes, a plurality of vent holes are formed in the vent pipes, and two adjacent vent pipes are connected through a connecting pipe; the slippage 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, 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, which extends 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, which extends out of the second piston type plug, is connected with a second steel wire rope on the second winch, an air pumping 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 pumping beam pipe, which is positioned in the sampling cavity, is provided with a filter pipe, and one end of the air pumping beam pipe, which is far away from the sampling cavity and is positioned in a communication roadway, is connected with a gas sampling mechanism, one end of the flushing pipe, which is positioned in the sampling cavity, is provided with a flushing sprayer facing the filter pipe, one end of the flushing pipe, which is far away from the sampling cavity and is positioned in the communication roadway, is connected with a flushing mechanism, and one end of the nitrogen injection pipe, which is far away from the sampling cavity and is positioned in the communication roadway, is connected with a nitrogen injection mechanism; the communication channel is also internally provided with an intrinsic safety type monitoring host and three double-crawler tractors which are respectively used for an air exhaust beam pipe, a flushing pipe and a nitrogen injection pipe, and the three double-crawler tractors are controlled by the intrinsic safety type monitoring host.
The goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system is characterized in that: the length of the connecting pipe is 1 m-5 m.
The goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system is characterized in that: a length measuring sensor used for monitoring the hoisting length of the first steel wire rope is arranged on the first hoisting machine and connected with the intrinsic safety type monitoring host.
The goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system is characterized in that: the gas sampling mechanism comprises an air pump connected with an air pumping bundle pipe, an air flow sensor is arranged at the air pumping end of the air pump, an adsorption dryer is connected with the air delivery end of the air 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.
The goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system is characterized in that: and the gas flow sensor and the intrinsic safety type multi-parameter sensor are connected with the intrinsic safety type monitoring host.
The goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system is 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 all controlled by the intrinsic safety type monitoring host.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the slippage mechanism circularly moves in the steel pipeline through the first winch and the second winch, so that the gas sampling mechanism can be dynamically monitored in a goaf in a circulating manner through the exhaust beam tube, the timeliness and the spatial continuity of gas sampling in time are ensured, the coal spontaneous combustion prevention and control efficiency of the goaf is improved, and the accurate nitrogen injection prevention and control fire extinguishing can be carried out on the coal spontaneous combustion early warning risk area at the first time through the nitrogen injection mechanism, so that the nitrogen utilization rate is improved, and the popularization and the use are convenient.
2. The gas sampling state can be monitored in real time by utilizing the gas flow sensor arranged on the air suction 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 invention has novel and reasonable design, utilizes the intrinsic safety type monitoring host to control the operation of the whole device, only needs to be arranged once, does not need manual treatment subsequently, realizes intelligent and cyclic dynamic whole process of gas sampling and nitrogen injection prevention and control, reduces the labor safety of workers, reduces the material waste and is convenient to popularize and use.
In conclusion, the device is novel and reasonable in design and high in practicability, the slippage mechanism circularly moves in the steel pipeline through the first winch and the second winch, the gas sampling mechanism is dynamically monitored in a circulating mode in the goaf through the exhaust beam tube, the timeliness and the spatial continuity of gas sampling are guaranteed, the coal spontaneous combustion prevention and control efficiency of the goaf is improved, accurate nitrogen injection prevention and control fire extinguishing can be carried out on a coal spontaneous combustion early warning risk area in the first time, the utilization rate of nitrogen is improved, multiple times of pipe burying are not needed, the labor burden of workers is relieved, material waste is reduced, and the device is convenient to popularize and use.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic view of a usage state of the goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system.
Fig. 2 is an enlarged schematic view of a portion a of fig. 1.
Fig. 3 is a schematic cross-sectional view of fig. 2 taken along line C-C.
Fig. 4 is an enlarged schematic view of fig. 1 at B.
FIG. 5 is a schematic circuit block diagram of an intelligent dynamic circulating gas sampling prevention and control system for spontaneous combustion of coal in a goaf.
FIG. 6 is a schematic diagram of the use state of a sliding mechanism of the goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system in a steel pipeline.
FIG. 7 is a schematic structural diagram of a gas permeable pipe of the goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system.
FIG. 8 is a schematic structural diagram of a connecting pipe of the goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system.
Description of reference numerals:
| 1-a goaf; | 2-coal layer air inlet lane; | 3-coal seam air return; |
| 4-intrinsic safety type monitoring host; | 5, steel pipeline; | 5-1-a gas permeable pipe; |
| 5-2-connecting pipe; | 5-3-air holes; | 6-a winch; |
| 6-1-steel wire rope; | 6-2-length measuring sensor; | 7-second winch; |
| 7-1-No. two steel wire rope; | piston plug No. 8-one; | 9-piston plug No. two; |
| 10-galvanized gasket; | 11-a central connecting shaft; | 12-intrinsically safe multi-parameter sensor; |
| 13-adsorption dryer; | 14-a suction pump; | 14-1-pumping beam tube |
| 14-2-a filter tube; | 14-3-gas flow sensor | 15-high pressure water pump; |
| 15-1-a flush pipe; | 15-2-flushing nozzle; | 16-nitrogen making machine; |
| 17-nitrogen injection machine; | 17-1-nitrogen injection tube; | 18-dual track tractor; |
| 19-a protective box body; | and 20, connecting lanes. |
Detailed Description
As shown in fig. 1 to 8, the invention includes two groups of gas sampling prevention and control devices respectively extending into a goaf 1 along the extending direction of a coal seam air inlet lane 2 and a coal seam air return lane 3, the gas sampling prevention and control devices include a protective box 19 arranged at the position of the goaf 1, a steel pipe 5 arranged along the length direction of coal seam excavation and connected with the protective box 19, and a first winch 6 arranged outside one end of the steel pipe 5 far away from the goaf and located in a communication roadway 20, and a second winch 7 is arranged in the protective box 19; a sliding mechanism is arranged in the steel pipeline 5, the steel pipeline 5 comprises a plurality of vent pipes 5-1, a plurality of vent holes 5-3 are formed in the vent pipes 5-1, and two adjacent vent pipes 5-1 are connected through a connecting pipe 5-2; the sliding mechanism comprises a central connecting shaft 11, and 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, which extends out of the first piston type plug 8, is connected with a first steel wire rope 6-1 on a first winding engine 6, one end of the central connecting shaft 11, which extends out of the second piston type plug 9, is connected with a second steel wire rope 7-1 on a second winding engine 7, an air pumping beam pipe 14-1, a flushing pipe 15-1 and a nitrogen injection pipe 17-1 are respectively arranged on the first piston type plug 8 in a penetrating manner, and a filter pipe 14-2 is arranged at one end of the air pumping beam pipe 14-1, which is positioned in the sampling cavity, one end of the air exhaust beam pipe 14-1, which is far away from the sampling cavity and is positioned in the communication roadway 20, is connected with a gas sampling mechanism, one end of the gas sampling mechanism, which is positioned in the sampling cavity, which is positioned in the flushing pipe 15-1, is provided with a flushing sprayer 15-2 facing the filter pipe 14-2, one end of the flushing pipe 15-1, which is far away from the sampling cavity and is positioned in the communication roadway 20, is connected with a flushing mechanism, and one end of the nitrogen injection pipe 17-1, which is far away from the sampling cavity and is positioned in the communication roadway 20, is connected with a nitrogen injection mechanism; the communication channel 20 is also internally provided with an intrinsic safety type monitoring host 4 and three double-track tractors 18 which are respectively used for an air exhaust beam tube 14-1, a flushing tube 15-1 and a nitrogen injection tube 17-1, and the three double-track tractors 18 are controlled by the intrinsic safety type monitoring host 4.
It should be noted that, the first winch 6 and the second winch 7 are matched with each other, so that the sliding mechanism can move back and forth in the steel pipeline 5, a sampling cavity is formed by matching the first piston type plug 8, the second piston type plug 9 and the vent pipe 5-1, so that the gas sampling mechanism samples gas in the sampling cavity, thereby realizing the dynamic monitoring of the gas sampling mechanism in the goaf 1 through the circulation of the pumping beam pipe 14-1, ensuring the timeliness and spatial continuity of gas sampling in time, improving the coal spontaneous combustion prevention and control efficiency of the goaf, when the gas sample parameters of the gas sampling mechanism reach the coal spontaneous combustion early warning, the nitrogen injection prevention and control can be carried out at the first time through the arranged nitrogen injection mechanism, the nitrogen utilization rate is improved, and by utilizing the arranged flushing mechanism, the filter pipe 14-2 for gas sampling can be flushed through the flushing nozzle 15-2, the filter pipe 14-2 is prevented from being blocked by coal ash to influence gas, and the extraction and drawing movement of the air extraction bundle pipe 14-1, the flushing pipe 15-1 and the nitrogen injection pipe 17-1 in the steel pipe 5 is carried out by arranging three double-crawler belt tractors 18 which are respectively used for the air extraction bundle pipe 14-1, the flushing pipe 15-1 and the nitrogen injection pipe 17-1.
In this embodiment, the length of the connection pipe 5-2 is 1m to 5 m.
In this embodiment, the first winch 5-3 is provided with a length measuring sensor 6-2 for monitoring the winch length of the first steel 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 an air pump 14 connected to an air pumping bundle tube 14-1, an air flow sensor 14-3 is disposed at an air pumping end of the air pump 14, an adsorption dryer 13 is connected to an air delivery end of the air 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 collecting space area coal spontaneous combustion intelligence developments circulating 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 both 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 intrinsically safe monitoring host 4.
When in use, the invention mainly comprises the following steps:
when in use, the invention mainly comprises the following steps:
step one, setting an initialization position of a sliding mechanism in a steel pipeline: dividing three-zone standards of the gob according to the oxygen concentration, and setting the initial position of a sliding mechanism in the steel pipeline 1 at the critical position of an oxidation zone and a suffocation zone of the gob 1;
step two, starting the operation gas sampling prevention and control device: the intrinsic safety type monitoring host machine 4 controls the first winch 6 and the second winch 7 to be opened, the first winch 6 winds the first steel wire rope 6-1 to pull the sliding mechanism to move in the positive direction of coal seam mining, the second winch 7 lifts the second steel wire rope 7-1, meanwhile, the intrinsic safety type monitoring host machine 4 controls the three double-track tractors 18 to be opened, the three double-track tractors 18 respectively pull and draw the air pumping beam tube 14-1, the flushing water tube 15-1 and the nitrogen injection tube 17-1, the length measuring sensor 6-2 on the first winch 6 is used for measuring the winding length of the first steel wire rope 6-1, when the winding length of the first steel wire rope 6-1 is the length of one connecting tube 5-2, the sliding mechanism is shown to move to the position of the first vent tube 5-1, and the intrinsic safety type monitoring host machine 4 closes the first winch 6, A second winch 7 and three double-track tractors 18, and executing a third step, wherein the positive coal seam excavation direction refers to the coal seam excavation direction;
step three, judging whether the sliding mechanism is positioned in the oxidation zone region: the intrinsically safe monitoring host 4 controls an air pump 14 to be started, gas sampling is carried out in the sampling cavity through an air pumping beam tube 14-1, a collected gas sample enters an adsorption dryer 13 through the air pump 14, the gas sample is conveyed to the intrinsically safe multi-parameter sensor 12 for detection after the adsorption dryer 13 is dried, the intrinsically safe monitoring host 4 judges whether the sliding mechanism is located in an oxidation zone area or not according to the oxygen concentration in the detection result of the gas sample of the intrinsically safe multi-parameter sensor 12, if the sliding mechanism is located in the oxidation zone area, the fourth step is executed, and if the sliding mechanism is not located in the oxidation zone area, the fifth step is executed;
step four, coal spontaneous combustion analysis nitrogen injection early warning judgment: the intrinsic safety type monitoring host 4 analyzes and judges whether a coal spontaneous combustion early warning condition is met or not according to gas concentration parameters such as oxygen, carbon monoxide and methane in a gas sample detection result of the intrinsic safety type multi-parameter sensor 12, 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 generator 16 and the nitrogen injection machine 17 to be started, nitrogen is injected 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 fifth step;
step five, the sliding mechanism moves to the next vent pipe along the positive direction of coal seam excavation: the intrinsically safe monitoring host machine 4 controls the first winch 6 and the second winch 7 to be opened, the first winch 6 winds the first steel wire rope 6-1 to pull the sliding mechanism to move in the positive direction of coal seam mining, the second winch 7 winds the second steel wire rope 7-1, the intrinsically safe monitoring host machine 4 controls the three double-track tractors 18 to be opened, the three double-track tractors 18 respectively pull and draw the air pumping beam tube 14-1, the flushing pipe 15-1 and the nitrogen injection pipe 17-1, the length measuring sensor 6-2 on the first winch 6 is used for measuring the winding length of the first steel wire rope 6-1, when the winding length of the first steel wire rope 6-1 is the length of one connecting pipe 5-2, the sliding mechanism is shown to move to the position of the next vent pipe 5-1, and the intrinsically safe monitoring host machine 4 closes the first winch (6), The second winch 7 and the three double-track tractors 18 execute the step six;
step six, judging whether the slippage mechanism is positioned in the oxidation zone area according to the method in the step three: if the oxidation zone is the oxidation zone area, executing the step four, and if the oxidation zone is not the oxidation zone area, executing the step seven;
and seventhly, moving the sliding mechanism to the next vent pipe along the opposite direction of the coal seam excavation: the intrinsically safe monitoring host machine 4 controls the first winch 6 and the second winch 7 to be opened, the second winch 7 winds the second steel wire rope 7-1 to pull the sliding mechanism to move in the opposite direction of coal seam mining, the first winch 6 raises and releases the first steel wire rope 6-1, the raising and releasing length of the first steel wire rope 6-1 is measured by using the length measuring sensor 6-2 on the first winch 6, when the raising and releasing length of the first steel wire rope 6-1 is the length of one connecting pipe 5-2, the sliding mechanism slides to the position of the next vent pipe 5-1, the intrinsically safe monitoring host machine 4 closes the first winch 6 and the second winch 7, and step eight is executed, wherein the opposite direction of coal seam excavation refers to the opposite direction of coal seam excavation;
step eight, judging whether the slippage mechanism is positioned in the oxidation zone area according to the method in the step three: if the oxidation zone is the oxidation zone area, executing the step nine, and if not, executing the step five;
step nine, judging the coal self-combustion nitrogen injection early warning 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 intrinsically safe monitoring host 4 controls the nitrogen generator 16 and the nitrogen injection machine 17 to be started, nitrogen is injected through the nitrogen injection pipe 17-1, and meanwhile the intrinsically safe monitoring host 4 sends out early warning; and if the coal spontaneous combustion early warning condition is not met, executing the seventh step until the coal seam excavation is finished.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (6)
1. The utility model provides a collecting space area coal spontaneous combustion intelligence developments circulating gas sampling prevention and control system which characterized in that: the device comprises two groups of gas sampling prevention and control devices which respectively extend into a goaf (1) along the extension directions of a coal bed air inlet lane (2) and a coal bed air return lane (3), wherein each gas sampling prevention and control device comprises a protective box body (19) arranged at the end part of the goaf (1), a steel pipeline (5) which is arranged along the coal bed excavation length direction and is connected with the protective box body (19), and a first winch (6) which is arranged at the outer side of one end, far away from the goaf, of the steel pipeline (5) and is positioned in a connection roadway (20), a second winch (7) is arranged in the protective box body (19), and a sliding mechanism is arranged in the steel pipeline (5); the steel pipeline (5) comprises a plurality of vent pipes (5-1), a plurality of vent holes (5-3) are formed in the vent pipes (5-1), and two adjacent vent 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 arranged on two sides of the central connecting shaft (11) respectively, the first piston type plug (8) and the second piston type plug (9) are 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, extending out of the first piston type plug (8), of the central connecting shaft (11) is connected with a first steel wire rope (6-1) on a first winch (6), one end, extending out of the second piston type plug (9), of the central connecting shaft (11) is connected with a second steel wire rope (7-1) on a second winch (7), and an air pumping bundle pipe (14-1) are arranged on the first piston type plug (8) in a penetrating mode respectively, The device comprises a flushing pipe (15-1) and a nitrogen injection pipe (17-1), wherein one end of the air exhaust beam pipe (14-1) located in the sampling cavity is provided with a filter pipe (14-2), one end of the air exhaust beam pipe (14-1) far away from the sampling cavity and located in the communication roadway (20) is connected with a gas sampling mechanism, one end of the flushing pipe (15-1) located in the sampling cavity is provided with a flushing sprayer (15-2) facing the filter pipe (14-2), one end of the flushing pipe (15-1) far away from the sampling cavity and located in the communication 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 located in the communication roadway (20) is connected with the nitrogen injection mechanism; the communication channel (20) is also internally provided with an intrinsic safety type monitoring host (4) and three double-track tractors (18) which are respectively used for an air exhaust beam pipe (14-1), a flushing pipe (15-1) and a nitrogen injection pipe (17-1), and the three double-track tractors (18) are controlled by the intrinsic safety type monitoring host (4).
2. The goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system as claimed in claim 1, wherein: the length of the connecting pipe (5-2) is 1-5 m.
3. The goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system as claimed in claim 1, wherein: the first winch (5-3) is provided with a length measuring sensor (6-2) for monitoring the winch length of the first steel wire rope (6-1), and the length measuring sensor (6-2) is connected with the intrinsic safety type monitoring host (4).
4. The goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system as claimed in claim 1, wherein: the gas sampling mechanism comprises an air pump (14) connected with an air pumping beam tube (14-1), a gas flow sensor (14-3) is arranged at the air pumping end of the air pump (14), an adsorption dryer (13) is connected at the gas transmission end of the air pump (14), and the adsorption dryer (13) is connected with 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).
5. The goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control system of claim 6, wherein: 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 of claim 6, wherein: the first winch (6), the second winch (7), the air pump (14), the adsorption type drying machine (13), the high-pressure water pump (15), the nitrogen injection machine (17) and the nitrogen making machine (16) are all controlled by the intrinsic safety type monitoring host machine (4).
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