CN114087012A - Unmanned intelligent ventilation simulation experiment system and method for driving face - Google Patents
Unmanned intelligent ventilation simulation experiment system and method for driving face Download PDFInfo
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- 238000009423 ventilation Methods 0.000 title claims abstract description 62
- 238000004088 simulation Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000005641 tunneling Effects 0.000 claims abstract description 139
- 238000002474 experimental method Methods 0.000 claims abstract description 43
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 112
- 238000012544 monitoring process Methods 0.000 claims description 60
- 229910052757 nitrogen Inorganic materials 0.000 claims description 56
- 239000007789 gas Substances 0.000 claims description 51
- 238000001816 cooling Methods 0.000 claims description 47
- 238000002347 injection Methods 0.000 claims description 44
- 239000007924 injection Substances 0.000 claims description 44
- 238000000746 purification Methods 0.000 claims description 42
- 239000000428 dust Substances 0.000 claims description 38
- 239000003245 coal Substances 0.000 claims description 34
- 239000004509 smoke generator Substances 0.000 claims description 19
- 239000000126 substance Substances 0.000 claims description 19
- 238000012423 maintenance Methods 0.000 claims description 13
- 238000004140 cleaning Methods 0.000 claims description 12
- 239000010865 sewage Substances 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 9
- 239000012535 impurity Substances 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 238000013480 data collection Methods 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 229920002457 flexible plastic Polymers 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 claims 2
- 230000002045 lasting effect Effects 0.000 claims 1
- 231100000331 toxic Toxicity 0.000 description 7
- 230000002588 toxic effect Effects 0.000 description 7
- 238000004880 explosion Methods 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004887 air purification Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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- 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
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/02—Test models
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- 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
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/06—Transport of mined material at or adjacent to the working face
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- 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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- 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
- E21F3/00—Cooling or drying of air
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- 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
- E21F5/08—Rock dusting of mines; Depositing other protective substances
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- 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
- E21F5/20—Drawing-off or depositing dust
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Geochemistry & Mineralogy (AREA)
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Abstract
The invention relates to an unmanned intelligent ventilation simulation experiment system and an experiment method for a tunneling working face.
Description
Technical Field
The invention relates to a mine working face ventilation simulation system, in particular to an unmanned intelligent ventilation simulation experiment system and an unmanned intelligent ventilation simulation experiment method for a tunneling working face, and belongs to the technical field of tunneling working face ventilation simulation.
Background
Oil deficiency, gas shortage and relative coal enrichment are national conditions of energy resources in China, the consumption of coal energy is more than 50% of the total energy consumption for a long time, but most of coal in China is produced by underground mining, the underground coal bed conditions are complex, and accidents of gas explosion, fire, coal dust and the like are frequently caused. However, the coal mine underground accident frequently occurs in the area mainly focusing on the stope face and the driving face, especially the driving face, also called driving head, that is, a roadway is firstly mined to prepare for the stope face, and the work content is to primarily detect the material states of coal, water, gas and the like existing on the working face and prepare for the next coal mining work. The air supply device has the advantages that the front condition is unknown in the tunneling process, the danger is extremely high, if high gas in the front is gathered, a top plate is soft, and a large amount of water is gathered, various accidents can be triggered during tunneling, casualties and a large amount of economic and property losses are caused, in addition, when the tunneling distance is long, the air supply to a tunneling working face is very difficult, a required air duct is long, the requirement on required fan equipment is high, and under the condition that the tunneling face is more complicated, if the air quantity cannot meet the requirement, various toxic and harmful gases are gathered, and a great potential safety hazard is generated for tunneling. If roof accident, during the accident of permeating water meets in the process of tunneling, unmanned tunneling is not carried out, and no personnel exist on the tunneling working face, so that the life safety of personnel can be guaranteed under the first condition, and the problem that the tunnel is difficult to ventilate for long distance tunneling for many years is solved.
Disclosure of Invention
The invention aims to provide an unmanned intelligent ventilation simulation experiment system and an unmanned intelligent ventilation simulation experiment method for a tunneling working face, which can simulate the ventilation condition of the tunneling working face in an unmanned state and the normal ventilation condition of the tunneling working face in an overhauling state, so that the inert unmanned intelligent ventilation of the tunneling working face is realized, the injury of a major dangerous source of the tunneling working face to a human body is thoroughly eliminated, the life safety of coal mine workers is ensured from the most basic aspect, and meanwhile, the inert environment can remove the necessary conditions of explosion, fire hazard and other accidents and explosions, so that the occurrence of explosion and fire hazard accidents is stopped.
In order to achieve the aim, the invention provides an unmanned intelligent ventilation simulation experiment system for a driving face, which comprises a simulation experiment system arranged on a support bracket, wherein the simulation experiment system comprises a dust removal subsystem, a simulation driving face subsystem, a transportation subsystem, a ventilation subsystem, a purification and cooling subsystem, a nitrogen injection subsystem and a monitoring and monitoring subsystem;
the dust removal subsystem comprises a small dry dust remover and a pipeline IX, and the pipeline IX is connected with the small dry dust remover and is used for extracting dust generated by the simulated driving face and solving the problem of dust generated by the driving face;
the simulation tunneling working face subsystem comprises a smoke generator, a coal flow device, a heater and CO2The device comprises a generator, a fresh air flow pipeline, a simulation tunneling working face pipeline, a sewage discharge air pipeline, an air door I and an air door II, wherein the smoke generator and a coal flow device jointly simulate dust on the tunneling working face, a heater simulates heat emitted by various mechanical equipment on the tunneling working face and the surrounding environment of the tunneling working face, a CO2 generator replaces various toxic and harmful gases on the underground tunneling working face and simulates various toxic and harmful gases generated during tunneling work of the underground tunneling working face, and the air door I and the air door II enable the whole tunneling working face to be shapedForming a closed space, making the smoke generated by smoke generator be fed into the pipe of simulated driving face by means of pipe I, using switch I mounted on the pipe I to control smoke flow, making the float coal produced by coal flow device be fed into the pipe of simulated driving face by means of pipe II, using switch II mounted on the pipe II to control float coal quantity, CO2CO produced by the generator2Gas enters the pipeline of the simulated heading face through the pipeline III, and CO is controlled by a switch III arranged on the pipeline III2The size of the amount;
the transportation subsystem comprises a folding belt, a fixed belt, a transportation port and a storage device, the folding belt can simulate the forward effect of the transportation device when the tunneling working face is propelled in reality and undertakes the transportation of substances generated by the tunneling working face, the folding belt and the fixed belt are matched with each other to transport the substances generated by the tunneling working face out of the tunneling working face to the storage device, and the substances tunneled by the tunneling working face are temporarily collected by the storage device; the transportation opening is shielded by a curtain, so that air leakage of the transportation opening is reduced;
the ventilation subsystem comprises a fan I, a fan II, a pipeline VI, a pipeline IV, a pipeline V, a pipeline X, a pipeline VII, a purification cooling device, a switch VI, a switch V, a switch IV and a switch VII, wherein the fan I and the fan II work in a long-pressure short-pumping combined mode, the fan I is installed on the pipeline IV, the air outlet end of the fan I is respectively connected with the pipeline V and the pipeline X, the switch V and the switch IV are installed on the pipeline V, the switch V is installed at the air inlet of the pipeline V, the switch IV is installed at the air outlet of the pipeline V, the switch VI is installed on the pipeline X, the air outlet of the pipeline X is connected with a sewage air discharge pipeline, the air outlet of the pipeline V is connected with the pipeline VII, the pipeline VII is divided into two paths, one path is connected with a fresh air flow pipeline and is provided with the switch VII, the other path is provided with the air inlet of the purification cooling device, the air outlet of the purification cooling device is connected with the air inlet of the fan II, the air outlet of the fan II is connected with the pipeline VI; an air purification and cooling device is connected between the fan I and the fan II, dirty air generated by the tunneling working face is pumped out by the fan I to enter the purification and cooling device, the purification and cooling device is used for purifying air flow, the dirty air flow is pressed into the simulated tunneling working face through the fan II after being purified, a set of closed-loop circulating ventilation is formed, and the switch IV, the switch V, the switch VI and the switch VII are used for controlling the air flow circulation of the whole system;
the purification and cooling subsystem purifies the dirty air generated by the simulated driving face, and the purification and cooling device has a cooling function, and when the temperature of the simulated driving face is too high, the purification and cooling device cools and cools the purified gas and then transmits the cooled gas to the simulated driving face;
the nitrogen injection subsystem comprises a nitrogen injection device and a pipeline VIII, the nitrogen injection device is connected with the pipeline VIII, nitrogen is injected into the pipeline of the simulated driving face continuously, the oxygen concentration in the air of the simulated driving face is reduced to a micro-oxygen or oxygen-free state, the driving face is in a state of being filled with inert gas, and one of three necessary conditions of gas, fire and dust explosion of the driving face in reality is eliminated;
the monitoring subsystem comprises a four-in-one sensor and a CO2Monitoring sensor, O2Sensor and data acquisition device, heater, four-in-one sensor, CO2Monitoring sensor, O2The sensors are connected with a data acquisition device through leads, and the data acquisition device is connected with a computer;
CO2monitoring sensor monitors CO generated by simulating tunneling working face2Gas concentration (experimental system with CO)2Instead of other various toxic and harmful gases), the data acquisition device receives CO2Analyzing the data monitored by the monitoring sensor, working by the alarm device matched with the sensor and the data acquisition device, and if simulating CO (carbon monoxide) of the driving face2When the concentration is too high, CO exceeds a predetermined range2The sensor transmits the data collected in real time to the data collector, the computer analyzes the data collected by the data collector, and sends an overrun instruction to the alarm to give an alarm, and corresponding measures are taken for treatment.
The fresh air flow pipeline, the simulated tunneling working face pipeline and the sewage discharge air pipeline are rectangular, and the side length is 30 cm; the pipeline I, the pipeline II, the pipeline III, the pipeline IV, the pipeline V, the pipeline VI, the pipeline VII, the pipeline VIII, the pipeline IX and the pipeline X are all made of transparent PC plastic pipes; the diameters of the pipeline IV, the pipeline V, the pipeline VI, the pipeline VII, the pipeline X and the pipeline IX are all 50 mm; the pipeline IV is made of a flexible plastic pipe; the diameters of the pipeline I, the pipeline II and the pipeline III are respectively 25mm, 30mm and 25 mm; the diameter of the pipeline VIII is 15 mm.
The four-in-one sensor is a combination of a differential pressure sensor, an absolute pressure sensor, a temperature sensor and a humidity sensor.
An unmanned intelligent ventilation simulation experiment method for a driving face comprises the following specific steps:
firstly, assembling a simulation experiment system of a driving face: assembling the tunneling working face simulation experiment system according to requirements, after the assembly is completed, carrying out tightness inspection on the dust removal subsystem, the simulated tunneling working face subsystem, the transportation subsystem, the ventilation subsystem, the purification and cooling subsystem, the nitrogen injection subsystem and the monitoring and monitoring subsystem to ensure that the tightness of the dust removal subsystem, the simulated tunneling working face subsystem, the transportation subsystem, the ventilation subsystem, the purification and cooling subsystem, the nitrogen injection subsystem and the monitoring and monitoring subsystem is in a perfect state, and completing the assembly and tightness preparation;
monitoring and controlling four-in-one sensor and CO in subsystem in driving face simulation experiment system2Monitoring sensor, O2The sensor sets an abnormal alarm range value, and when the four-in-one sensor and the CO are used for simulating monitoring of the tunneling working surface2Monitoring sensor, O2When the data monitored by the sensor exceeds the limited range, the computer analyzes the data collected by the data collection device, transmits the analysis result to the alarm device for early warning prompt, and simultaneously takes corresponding measures to solve the problem, thereby completing all preparation works before the experiment;
carrying out a single simulation experiment: respectively simulating a circulating ventilation experiment when the underground tunneling working face normally tunnels and a conventional ventilation experiment in an overhaul state, finding problems according to the simulation experiment condition, and preparing for exploring to realize unmanned tunneling;
wherein, the circulating ventilation experimental process when simulating the normal tunneling of the underground tunneling working face is as follows:
firstly, starting a four-in-one sensor and CO in an experimental system2Monitoring sensor, O2Sensor, four-in-one sensor, CO2Monitoring sensor, O2The sensors monitor various parameters in the closed space of the simulated driving face in real time, the data acquisition device continuously acquires data, and the data are analyzed by the computer;
secondly, starting the nitrogen injection subsystem, opening the nitrogen injection device, conveying nitrogen to a closed tunneling working surface by the nitrogen injection machine through a pipeline VIII, and observing O on the data acquisition device for a period of time2O collected by sensor2Numerical value when O2When the value monitored by the sensor is approximately 0, the nitrogen injection subsystem is closed, and O2Sensor real-time monitoring O in closed space2Concentration of if O2The nitrogen injection subsystem can be automatically started when the concentration is suddenly increased;
thirdly, starting a dust removal subsystem, and opening the small dry dust remover for a certain time;
fourthly, starting the smoke generator, the coal flow device and CO2Generator, and turning on switch I, switch II and switch III, smoke generator, coal flow device and CO for a period of time2The generator respectively enters the simulated heading face pipeline through the pipeline III, the pipeline II and the pipeline I, after the substances generated by the smoke generator and the coal flow device enter the simulated heading face pipeline, a part of substances can be absorbed and treated by the dust removal subsystem, and the rest substances can be continuously remained in the closed space of the simulated heading face pipeline and flow down on the folding belt to be transported to the fixed belt along with the belt starting, and then transported out of the closed heading face, and CO is discharged from the closed heading face2CO generation by a generator2Continuously accumulating gas in the closed space of the simulated heading face for a period of time, and then simulating CO on the heading face2After an alarm device matched with the monitoring sensor gives an alarm, the switch I, the switch II and the switch III are closed;
fifthly, starting a ventilation subsystem, opening a switch IV and a switch V, then starting a fan I, a fan II and a purification and cooling subsystem, wherein the fan I pumps out dirty gas of the pipeline of the simulated driving face and enters the purification and cooling subsystem through the pipeline IV, the pipeline V and the pipeline VII, the purification and cooling subsystem purifies the dirty gas, and the fan II conveys the purified air to the pipeline of the simulated driving face through the pipeline VI to form closed space air flow circulation flow;
sixthly, when the simulation driving face is in the closed space, the four-in-one sensor and the CO are used2Monitoring sensor, O2Recovering data monitored by a sensor to be within an allowable range, closing a switch IV and a switch V after a circulating ventilation experiment is finished, opening a switch VI, closing a fan II, keeping the fan I to be started for a period of time, sucking out dirty gas generated in a simulation closed experiment system by the fan I, discharging the dirty gas into a sewage air pipeline, and closing the fan I, the switch VI and each subsystem in the experiment system for a period of time;
seventhly, cleaning the experiment system, and after the experiment is finished, cleaning impurities generated in the experiment system and recovering the initial state;
the experimental process of the ventilation of the tunneling working face in the process of simulating the underground maintenance state is as follows:
in the maintenance state, dirty air of the simulated tunneling working face needs to be discharged, so that fresh air needs to be injected into the simulated tunneling working face in the simulated maintenance state, and the specific operation steps are as follows:
the method comprises the following steps of firstly, repeatedly simulating the first step to the sixth step in the circulating ventilation experiment process when the underground tunneling working face normally tunnels;
and step two, opening the air door I, the air door II, the switch VII and the switch VI, simultaneously starting the fan I and the fan II, pumping out gas in the simulated driving face pipeline by the fan I, discharging the gas into a sewage discharge air pipeline through the pipeline IV and the pipeline X, conveying fresh air to the simulated driving face pipeline through the pipeline VII and the pipeline VI by the fan II which is a press-in type fan, continuously replacing dirty gas in the simulated driving face by the fresh air, and continuously maintaining for a period of time when O in the simulated driving face pipeline2The sensor value reaches the actual downhole O2Continuing for a period of time within the specified range;
the third step, continue oneAfter the period of time, the corresponding actual on-site maintenance time is finished, the air door I, the air door II and the switch VII are closed, the fan II is suspended, meanwhile, the nitrogen injection device is started, the nitrogen injection machine conveys nitrogen to the tunneling working face through the pipeline VIII, the fan I pumps out air of the simulated tunneling working face, the nitrogen is continuously replaced with the closed space of the simulated tunneling working face, and when O in the closed space of the simulated tunneling working face is detected2After the numerical value of the sensor is approximate to 0, suspending the fan I, closing the switch VI, simultaneously closing the nitrogen injection device, and recovering to the normal production tunneling state;
fourthly, after the experiment is finished, removing gas in the airtight space of the simulated driving face, cleaning an experiment system, cleaning impurities generated in the experiment system, and recovering the initial state;
fourthly, carrying out simulation experiments on various conditions: and combining two single simulation experiments in the step III, continuously circulating the experiments, exploring the problems possibly encountered by the intelligent ventilation of the actual underground unmanned tunneling working face, finding out what types of hidden dangers can be generated, timely searching for effective measures to process, and providing experimental conditions for the unmanned intelligent ventilation of the coal mine tunneling working face.
Compared with the prior art, the invention adopts a combination mode of the dust removal subsystem, the simulated tunneling working face subsystem, the transportation subsystem, the ventilation subsystem, the purification and cooling subsystem, the nitrogen injection subsystem, the monitoring and monitoring subsystem and the support bracket, has simple assembly and more convenient disassembly, can simulate the actual mine tunneling working face, and then can simulate the intelligent ventilation problem when the future underground tunneling working face realizes unmanned tunneling and the problem possibly caused when the unmanned tunneling is simulated, thereby researching the possible problems and laying a solid foundation for the ventilation when the unmanned tunneling and the unmanned tunneling are realized.
Drawings
FIG. 1 is a schematic diagram of an experimental system according to the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a left side view of FIG. 1;
in the figure: 1. pipelineI, 2, II, 3, III, 4, VIII, 5, VI, 6, IX, 7, heater, 8, four-in-one sensor, 9, CO2Monitoring sensor, 10, O2The device comprises a sensor 11, air doors I and 12, air doors II and 13, pipelines IV and 14, a small dry dust collector 15, fans I and 16, a lead 17, a data acquisition device 18, switches VI and 19, switches V and 20, pipelines V and 21, pipelines X and 22, fans II and 23, a purification and cooling device 24, pipelines VII and 25, switches IV and 26, switches VII and 27, a nitrogen injection device 28, a fresh air flow pipeline 29, a simulated tunneling working face pipeline 30, a sewage discharge air pipeline 31, a smoke generator 32, a coal flow device 33, CO and a smoke generator2Generator, 34, switch I, 35, switch II, 36, switch III, 37, support bracket, 38, foldable belt, 39, fixed belt, 40, storing device.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, an unmanned intelligent ventilation simulation experiment system for a heading face comprises a simulation experiment system arranged on a support bracket 37, wherein the simulation experiment system comprises a dust removal subsystem, a simulated heading face subsystem, a transportation subsystem, a ventilation subsystem, a purification and cooling subsystem, a nitrogen injection subsystem and a monitoring and monitoring subsystem;
the dust removal subsystem comprises a small dry dust remover 14 and a pipeline IX6, the pipeline IX6 is connected with the small dry dust remover 14, and the dust removal subsystem is used for extracting dust generated by the simulated tunneling working face and solving the problem of dust of the tunneling working face;
as shown in fig. 1 and 4, the simulated heading face subsystem comprises a smoke generator 31, a coal flow device 32, a heater 7 and CO2The generator 33, the fresh air flow pipeline 28, the simulated heading face pipeline 29, the sewage discharge air pipeline 30, the air door I11, the air door II12, the smoke generator 31 and the coal flow device 32 jointly simulate the dust of the heading face, and the heater 7 simulates heat, CO and CO emitted by various mechanical equipment of the heading face and the surrounding environment of the heading face2The generator 33 replaces various toxic and harmful gases of the underground driving working face to simulateVarious toxic and harmful gases generated during the tunneling work of the underground tunneling working face, a closed space is formed on the whole tunneling working face by an air door I11 and an air door II12, smoke generated by a smoke generator 31 enters a pipeline 29 of the simulated tunneling working face through a pipeline I1, the smoke flow is controlled by a switch I34 arranged on a pipeline I1, float coal generated by a coal flow device 32 enters the pipeline 29 of the simulated tunneling working face through a pipeline II2, the float coal amount is controlled by a switch II35 arranged on the pipeline II2, CO2 gas generated by a CO2 generator 33 enters the pipeline 29 of the simulated tunneling working face through a pipeline III3, and CO 36 arranged on a pipeline III3 controls CO 362The size of the amount;
the transportation subsystem comprises a folding belt 38, a fixed belt 39, a transportation port and a storage device 40, the folding belt 38 can simulate the effect that the transportation device carries substances generated by transporting the tunneling working face along with the advancing effect when the tunneling working face is advanced in reality, the folding belt 38 is matched with the fixed belt 39, the substances generated by the tunneling working face are transported out of the tunneling working face to the storage device 40, and the substances tunneled by the tunneling working face are temporarily collected by the storage device 40; the transportation opening is shielded by a curtain, so that air leakage of the transportation opening is reduced;
as shown in fig. 1 and fig. 3, the ventilation subsystem includes a fan I15, a fan II22, a pipeline VI5, a pipeline IV13, a pipeline V20, a pipeline X21, a pipeline VII24, a purification and cooling device 23, a switch VI18, a switch V19, a switch IV25 and a switch VII26, the fan I15 and the fan II22 operate in a long-pressure short-suction combined type, the fan I15 is installed on the pipeline IV13, an air outlet end of the fan I15 is respectively connected with the pipeline V20 and the pipeline X21, a switch V19 and a switch IV25 are installed on the pipeline V20, the switch V19 is installed at an air inlet of the pipeline V20, the switch IV25 is installed at an air outlet of the pipeline V20, the switch VI18 is installed on the pipeline X21, an air outlet of the pipeline X21 is connected with the exhaust air pipeline VII 30, an air outlet of the pipeline V20 is connected with the pipeline VII24, the pipeline VII24 is divided into two paths, one path is connected with the fresh air flow pipeline 28, and the purification and the cooling device is installed on the pipeline 26, the air outlet of the purification cooling device 23 is connected with the air inlet of a fan II22, and the air outlet of a fan II22 is connected with a pipeline VI 5; the air purification and cooling device 23 is connected between the fan I15 and the fan II22, the fan I15 pumps out dirty air generated by the tunneling working face and enters the purification and cooling device 23, the purification and cooling device 23 purifies air flow, the dirty air flow is pressed into the simulated tunneling working face through the fan II22 after being purified, a set of closed-loop circulating ventilation is formed, and the switch IV25, the switch V19, the switch VI18 and the switch VII26 control the air flow circulation of the whole system;
the purification and cooling subsystem purifies the dirty air generated by the simulated driving face, and the purification and cooling device has a cooling function, and when the temperature of the simulated driving face is too high, the purification and cooling device cools and cools the purified gas and then transmits the cooled gas to the simulated driving face;
the nitrogen injection subsystem comprises a nitrogen injection device 27 and a pipeline VIII4, wherein the nitrogen injection device 27 is connected with a pipeline VIII4, nitrogen is continuously injected into the pipeline 29 of the simulated tunneling working face, the oxygen concentration in the air of the simulated tunneling working face is reduced to a micro-oxygen or oxygen-free state, the tunneling working face is in a state of being filled with inert gas, and one of three necessary conditions of gas, fire and dust explosion of the tunneling working face in reality is eliminated;
as shown in FIGS. 1 and 2, the monitoring subsystem includes a four-in-one sensor 8, CO2Monitoring sensor 9, O2A sensor 10 and a data acquisition device 17, wherein the four-in-one sensor 8 is a combination of a differential pressure sensor, an absolute pressure sensor, a temperature sensor and a humidity sensor, the heater 7, the four-in-one sensor 8 and CO2Monitoring sensor 9, O2The sensors 10 are all connected with a data acquisition device 17 through leads 16, and the data acquisition device 17 is connected with a computer;
CO2the monitoring sensor 9 monitors CO generated by the simulated driving face2Gas concentration (experimental system with CO)2Instead of other various toxic and harmful gases), the data acquisition device 17 receives CO2The data monitored by the monitoring sensor 9 is analyzed, the alarm device works in cooperation with the sensor and the data acquisition device, and if the CO of the tunneling working face is simulated2When the concentration is too high, CO exceeds a predetermined range2The monitoring sensor 9 will beThe data collected in the process is transmitted to the data collection device 17, the computer analyzes the data collected by the data collection device 17, an overrun instruction is sent to the alarm to give an alarm, and corresponding measures are taken for treatment.
The fresh air flow pipeline 28, the simulated tunneling working face pipeline 29 and the sewage discharge air pipeline 30 are rectangular, and the side length is 30 cm; the materials selected from the pipeline I1, the pipeline II2, the pipeline III3, the pipeline IV13, the pipeline V20, the pipeline VI5, the pipeline VII24, the pipeline VIII4, the pipeline IX6 and the pipeline X21 are all transparent PC plastic pipes; the diameters of the pipelines selected from the pipeline IV13, the pipeline V20, the pipeline VI5, the pipeline VII24, the pipeline X21 and the pipeline IX6 are all 50 mm; the material selected for the pipeline IV13 is a flexible plastic pipe; the diameters of the pipelines adopted by the pipeline I1, the pipeline II2 and the pipeline III3 are respectively 25mm, 30mm and 25 mm; the diameter of the pipeline selected from the pipeline VIII4 is 15 mm.
An unmanned intelligent ventilation simulation experiment method for a driving face comprises the following specific steps:
firstly, assembling a simulation experiment system of a driving face: assembling the tunneling working face simulation experiment system according to requirements, after the assembly is completed, carrying out tightness inspection on the dust removal subsystem, the simulated tunneling working face subsystem, the transportation subsystem, the ventilation subsystem, the purification and cooling subsystem, the nitrogen injection subsystem and the monitoring and monitoring subsystem to ensure that the tightness of the dust removal subsystem, the simulated tunneling working face subsystem, the transportation subsystem, the ventilation subsystem, the purification and cooling subsystem, the nitrogen injection subsystem and the monitoring and monitoring subsystem is in a perfect state, and completing the assembly and tightness preparation;
② a four-in-one sensor 8 and CO in a monitoring subsystem in the simulation experiment system of the driving working face2Monitoring sensor 9, O2The sensor 10 sets an abnormal alarm range value, and when the four-in-one sensor 8 and CO for monitoring and controlling the simulated driving face are used2 Monitoring sensor 9, O2When the data monitored by the sensor 10 exceeds the limited range, the computer analyzes the data collected by the data collecting device 17, transmits the analysis result to the alarm device for early warning prompt, and simultaneously takes corresponding measures to solve the problem, thereby all preparation workers before the experiment is finishedMaking;
carrying out a single simulation experiment: respectively simulating a circulating ventilation experiment when the underground tunneling working face normally tunnels and a conventional ventilation experiment in an overhaul state, finding problems according to the simulation experiment condition, and preparing for exploring to realize unmanned tunneling;
wherein, the circulating ventilation experimental process when simulating the normal tunneling of the underground tunneling working face is as follows:
first, start the four-in-one sensor 8, CO in the experimental system2Monitoring sensor 9, O2Sensor 10, four-in-one sensor 8, CO2Monitoring sensor 9, O2The sensor 10 monitors various parameters in the closed space of the simulated driving face in real time, the data acquisition device 17 continuously acquires data, and the data are analyzed by a computer;
secondly, the nitrogen injection subsystem is started, the nitrogen injection device 27 is opened, the nitrogen injection machine transmits nitrogen to the closed simulated heading face pipeline 29 through the pipeline VIII4, and O on the data acquisition device 17 is observed for a period of time2O collected by sensor 102Numerical value when O2When the value monitored by the sensor 10 is approximately 0, the nitrogen injection subsystem, O, is turned off2 Sensor 10 monitors O in enclosed space in real time2In a concentration of if O2The nitrogen injection subsystem can be automatically started when the concentration is suddenly increased;
thirdly, starting a dust removal subsystem, and opening the small dry dust remover 14 for a certain time;
the fourth step, starting the smoke generator 31, the coal flow device 32 and the CO2Generator 33 and, for a period of time, switch I34, switch II35, and switch III36, smoke generator 31, coal flow device 32, and CO are turned on2The generator 33 respectively leads the generated substances to enter the simulated heading face pipeline 29 through the pipeline III3, the pipeline II2 and the pipeline I1, after the substances generated by the smoke generator 31 and the coal flow device 32 enter the simulated heading face pipeline 29, a part of the substances are absorbed and processed by the dust removal subsystem, and the rest substances are continuously remained in the sealed space of the simulated heading face and fall on the folding belt 38 to be transported to the fixed belt 39 along with the belt starting, and then are transported out of the sealed heading face, and CO is introduced into the pipeline2The generator 33 generates CO2Continuously accumulating gas in the closed space of the simulated heading face for a period of time, and then simulating CO on the heading face2After an alarm device matched with the monitoring sensor 9 gives an alarm, the switch I34, the switch II35 and the switch III36 are closed;
fifthly, starting a ventilation subsystem, turning on a switch IV25 and a switch V19, then starting a fan I15, a fan II22 and a purification and cooling subsystem, wherein the fan I15 pumps out dirty gas of the pipeline 29 of the simulated driving face to enter the purification and cooling subsystem through a pipeline IV13, a pipeline V20 and a pipeline VII24, and after the purification and cooling subsystem purifies the dirty gas, the fan II22 conveys the purified air to the pipeline 29 of the simulated driving face through a pipeline VI5 to form closed space air flow circulation flow;
sixthly, when the four-in-one sensor 8 and CO are used in the closed space of the simulated heading face2Monitoring sensor 9, O2Recovering data monitored by the sensor 10 to be within an allowable range, ending a circulating ventilation experiment, closing a switch IV25 and a switch V19, opening a switch VI18, closing a fan II22, keeping a fan I15 to be started for a period of time, sucking out dirty gas generated in a simulation closed experiment system by the fan I15, discharging the dirty gas into a sewage air pipeline 30, and closing the fan I15, the switch VI18 and each subsystem in the experiment system for a period of time;
seventhly, cleaning the experiment system, and after the experiment is finished, cleaning impurities generated in the experiment system and recovering the initial state;
the experimental process of the ventilation of the tunneling working face in the process of simulating the underground maintenance state is as follows:
in the maintenance state, dirty air of the simulated tunneling working face needs to be discharged, so that fresh air needs to be injected into the simulated tunneling working face in the simulated maintenance state, and the specific operation steps are as follows:
the method comprises the following steps of firstly, repeatedly simulating the first step to the sixth step in the circulating ventilation experiment process when the underground tunneling working face normally tunnels;
in the second step, the air door I11, the air door II12, the switch VII26 and the switch VI18 are opened, the fan I15 and the fan II22 are started simultaneously, and the fan I15 simulatesPumping gas out of the pipeline 29 of the tunneling working face, discharging the gas into a sewage discharge air pipeline 30 through a pipeline IV13 and a pipeline X21, conveying fresh air to the pipeline 29 of the simulated tunneling working face through a pipeline VII28 and a pipeline VI5 by using a fan II22 which is a press-in type fan, continuously replacing dirty gas in the simulated tunneling working face by the fresh air, and continuously replacing the dirty gas in the pipeline 29 of the simulated tunneling working face for a period of time when the air in the pipeline 29 of the simulated tunneling working face is O2Sensor 10 value to actual downhole O2Continuing for a period of time within the specified range;
thirdly, after a period of time, finishing the corresponding actual on-site maintenance time, closing an air door I11, an air door II12 and a switch VII26, suspending a fan II22, simultaneously starting a nitrogen injection device, conveying nitrogen to the tunneling working face through a pipeline VIII4 by the nitrogen injection machine, pumping air out of the simulated tunneling working face by the fan I15, continuously replacing the nitrogen with the closed space of the simulated tunneling working face, and when O in the closed space of the simulated tunneling working face is in the condition that the maintenance time of the actual on-site is finished2After the value of the sensor 10 is approximate to 0, suspending the fan I15, closing the switch VI18, and simultaneously closing the nitrogen injection device to recover to the normal production tunneling state;
fourthly, after the experiment is finished, removing gas in the airtight space of the simulated driving face, cleaning an experiment system, cleaning impurities generated in the experiment system, and recovering the initial state;
fourthly, carrying out simulation experiments on various conditions: and combining two single simulation experiments in the step III, continuously circulating the experiments, exploring the problems possibly encountered by the intelligent ventilation of the actual underground unmanned tunneling working face, finding out what types of hidden dangers can be generated, timely searching for effective measures to process, and providing experimental conditions for the unmanned intelligent ventilation of the coal mine tunneling working face.
Claims (4)
1. An unmanned intelligent ventilation simulation experiment system for a driving face comprises a simulation experiment system arranged on a support bracket (37), and is characterized in that the simulation experiment system comprises a dust removal subsystem, a simulation driving face subsystem, a transportation subsystem, a ventilation subsystem, a purification and cooling subsystem, a nitrogen injection subsystem and a monitoring and monitoring subsystem;
the dust removal subsystem comprises a small dry dust remover (14) and a pipeline IX (6), and the pipeline IX (6) is connected with the small dry dust remover (14);
the simulation tunneling working face subsystem comprises a smoke generator (31), a coal flow device (32), a heater (7) and CO2Generator (33), fresh air current pipeline (28), simulation headwork face pipeline (29) and blowdown wind pipeline (30), air door I (11) and air door II (12) form a confined space with whole headwork face, the smog that smoke generator (31) produced gets into simulation headwork face pipeline (29) by pipeline I (1), switch I (34) of installing on pipeline I (1) control smog flow size, the float coal that coal stream device (32) produced gets into simulation headwork face pipeline (29) by pipeline II (2), the size of float coal volume is controlled by switch II (35) of installing on pipeline II (2), CO2CO produced by the generator (33)2Gas enters the pipeline (29) of the simulated heading face through the pipeline III (3), and CO is controlled by a switch III (36) arranged on the pipeline III (3)2The size of the amount;
the transportation subsystem comprises a folding belt (38), a fixed belt (39), a transportation port and a storage device (40), the folding belt (38) and the fixed belt (39) are matched with each other, substances generated by the tunneling working face are transported out of the tunneling working face to the storage device (40), and the substances tunneled by the tunneling working face are temporarily collected by the storage device (40); the transport port is shielded by a curtain;
the ventilation subsystem comprises a fan I (15), a fan II (22), a pipeline VI (5), a pipeline IV (13), a pipeline V (20), a pipeline X (21), a pipeline VII (24), a purification and cooling device (23), a switch VI (18), a switch V (19), a switch IV (25) and a switch VII (26), wherein the fan I (15) and the fan II (22) work in a long-pressure and short-suction combined mode, the fan I (15) is installed on the pipeline IV (13), the air outlet end of the fan I (15) is respectively connected with the pipeline V (20) and the pipeline X (21), the switch V (19) and the switch IV (25) are installed on the pipeline V (20), the switch V (19) is installed at the air inlet of the pipeline V (20), the switch IV (25) is installed at the air outlet of the pipeline V (20), the switch VI (18) is installed on the pipeline X (21), the air outlet of the pipeline X (21) is connected with a sewage discharge air pipeline (30), an air outlet of the pipeline V (20) is connected with a pipeline VII (24), the pipeline VII (24) is divided into two paths, one path is connected with a fresh air flow pipeline (28), a switch VII (26) is installed on the fresh air flow pipeline (28), the other path is provided with an air inlet of a purification cooling device (23), an air outlet of the purification cooling device (23) is connected with an air inlet of a fan II (22), and an air outlet of the fan II (22) is connected with a pipeline VI (5);
the purification and cooling subsystem purifies the dirty air generated by the simulated driving face, and the purification and cooling device has a cooling function, and when the temperature of the simulated driving face is too high, the purification and cooling device cools and cools the purified gas and then transmits the cooled gas to the simulated driving face;
the nitrogen injection subsystem comprises a nitrogen injection device (27) and a pipeline VIII (4), the nitrogen injection device (27) is connected with the pipeline VIII (4), and nitrogen is injected into the pipeline (29) of the simulated tunneling working face continuously;
the monitoring subsystem comprises a four-in-one sensor (8) and CO2Monitoring sensor (9), O2A sensor (10), a data acquisition device (17), a heater (7), a four-in-one sensor (8), and CO2Monitoring sensor (9), O2The sensors (10) are connected with a data acquisition device (17) through leads (16), and the data acquisition device (17) is connected with a computer.
2. The unmanned intelligent excavation face ventilation simulation experiment system according to claim 1, wherein the fresh air flow pipeline (28), the simulated excavation face pipeline (29) and the blowdown air pipeline (30) are rectangular in shape, and the side length is 30 cm; the pipeline I (1), the pipeline II (2), the pipeline III (3), the pipeline IV (13), the pipeline V (20), the pipeline VI (5), the pipeline VII (24), the pipeline VIII (4), the pipeline IX (6) and the pipeline X (21) are all made of transparent PC plastic pipes; the diameters of the pipelines selected from the pipeline IV (13), the pipeline V (20), the pipeline VI (5), the pipeline VII (24), the pipeline X (21) and the pipeline IX (6) are all 50 mm; the pipeline IV (13) is made of a flexible plastic pipe; the diameters of the pipelines adopted by the pipeline I (1), the pipeline II (2) and the pipeline III (3) are respectively 25mm, 30mm and 25 mm; the diameter of the pipeline selected by the pipeline VIII (4) is 15 mm.
3. The unmanned intelligent ventilation simulation experiment system for the tunneling working face according to claim 1, wherein the four-in-one sensor (8) is a combination of a differential pressure sensor, an absolute pressure sensor, a temperature sensor and a humidity sensor.
4. An unmanned intelligent ventilation simulation experiment method for a driving face is characterized by comprising the following specific steps:
firstly, assembling a simulation experiment system of a driving face: assembling the tunneling working face simulation experiment system, and after the assembly is completed, carrying out tightness inspection on the dust removal subsystem, the simulated tunneling working face subsystem, the transportation subsystem, the ventilation subsystem, the purification and cooling subsystem, the nitrogen injection subsystem and the monitoring and monitoring subsystem to ensure that the tightness of the dust removal subsystem, the simulated tunneling working face subsystem, the transportation subsystem, the ventilation subsystem, the purification and cooling subsystem, the nitrogen injection subsystem and the monitoring and monitoring subsystem is in a perfect state, so that the assembly and the tightness preparation are completed;
② four-in-one sensor (8) and CO in monitoring subsystem in simulation experiment system for driving working face2Monitoring sensor (9), O2The sensor (10) is set with an abnormal alarm range value, and when the four-in-one sensor (8) for monitoring and controlling the tunneling working face and the CO are simulated2Monitoring sensor (9), O2When the data monitored by the sensor (10) exceed the limited range, the computer analyzes the data collected by the data collection device (17), and transmits the analysis result to the alarm device for early warning prompt, and meanwhile, corresponding measures are taken for solving, so that all preparation work before the experiment is finished;
carrying out a single simulation experiment: respectively simulating a circulating ventilation experiment when the underground tunneling working face normally tunnels and a conventional ventilation experiment in an overhaul state, finding problems according to the simulation experiment condition, and preparing for exploring to realize unmanned tunneling;
wherein, the circulating ventilation experimental process when simulating the normal tunneling of the underground tunneling working face is as follows:
firstly, a four-in-one sensor (8) and CO in an experimental system are started2Monitoring sensor (9), O2Sensor with a sensor element(10) Four-in-one sensor (8) and CO2Monitoring sensor (9), O2The sensor (10) monitors various parameters in the closed space of the simulated driving face in real time, the data acquisition device (17) continuously acquires data, and the data are analyzed by a computer;
secondly, the nitrogen injection subsystem is started, the nitrogen injection device (27) is opened, the nitrogen injection machine conveys nitrogen to the airtight tunneling working face through a pipeline VIII (4), and O on the data acquisition device (17) is observed for a period of time2O collected by the sensor (10)2Numerical value when O2When the value monitored by the sensor (10) is approximately 0, the nitrogen injection subsystem is closed, and O2Sensor (10) monitors O in closed space in real time2In a concentration of if O2The nitrogen injection subsystem can be automatically started when the concentration is suddenly increased;
thirdly, starting a dust removal subsystem, and opening the small dry dust remover (14) for a certain time;
fourthly, starting the smoke generator (31), the coal flow device (32) and the CO2Generator (33) and, for a period of time, switch I (34), switch II (35) and switch III (36), smoke generator (31), coal flow device (32) and CO2The generator (33) respectively enters the tunneling working face through a pipeline III (3), a pipeline II (2) and a pipeline I (1) with generated substances, after the substances generated by the smoke generator (31) and the coal flow device (32) enter the simulated tunneling working face, a part of the substances are absorbed and treated by the dust removal subsystem, and the rest substances are continuously remained in the closed space of the simulated tunneling working face and flow down onto the folding belt (38) to be transported to the fixed belt (39) along with the starting of the belt, so that the closed tunneling working face is transported out, and CO is discharged out of the closed tunneling working face2The generator (33) generates CO2Continuously accumulating gas in the closed space of the simulated heading face for a period of time, and then simulating CO on the heading face2After an alarm device matched with the monitoring sensor (9) gives an alarm, the switch I (34), the switch II (35) and the switch III (36) are closed;
fifthly, starting a ventilation subsystem, turning on a switch IV (25) and a switch V (19), then starting a fan I (15), a fan II (22) and a purification and cooling subsystem, wherein the fan I (15) pumps out the dirty gas simulating the tunneling working face and enters the purification and cooling subsystem through a pipeline IV (13), a pipeline V (20) and a pipeline VII (24), the fan II (22) conveys the purified air to the tunneling working face through a pipeline VI (5) after the purification and cooling subsystem purifies the dirty gas, and the air flow of a closed space is formed to flow circularly;
sixthly, when the simulation driving face is in the closed space, the four-in-one sensor (8) and the CO are used2Monitoring sensor (9), O2Recovering data monitored by a sensor (10) to be within an allowable range, finishing a circulating ventilation experiment, closing a switch IV (25) and a switch V (19), opening a switch VI (18), closing a fan II (22), keeping the fan I (15) open for a period of time, sucking out dirty gas generated in a simulation mode in a closed experiment system by the fan I (15), discharging the dirty gas into a sewage air discharge pipeline (30), and closing the fan I (15), the switch VI (18) and each subsystem in the experiment system for a certain period of time;
seventhly, cleaning the experiment system, and after the experiment is finished, cleaning impurities generated in the experiment system and recovering the initial state;
the experimental process of the ventilation of the tunneling working face in the process of simulating the underground maintenance state is as follows:
in the maintenance state, dirty air of the simulated tunneling working face needs to be discharged, so that fresh air needs to be injected into the simulated tunneling working face in the simulated maintenance state, and the specific operation steps are as follows:
the method comprises the following steps of firstly, repeatedly simulating the first step to the sixth step in the circulating ventilation experiment process when the underground tunneling working face normally tunnels;
the second step, open air door I (11), air door II (12), switch VII (26), switch VI (18), start fan I (15) and fan II (22) simultaneously, fan I (15) will simulate the gas in the driving face and take out, blowdown wind pipe way (30) are discharged in through pipeline IV (13) and pipeline X (21), fan II (22) are the pressure-in fan, carry simulation driving face pipeline (29) through pipeline VII (28) and pipeline VI (5) with the fresh air stream, dirty gas in simulation driving face pipeline (29) is constantly replaced to the fresh air stream, after lasting a period, in simulation driving face pipeline (29) O2The value of the sensor (10) reaches the actual underground O2Continuing for a period of time within the specified range;
thirdly, after a period of time, finishing the corresponding actual on-site maintenance time, closing the air door I (11), the air door II (12) and the switch VII (26), suspending the fan II (22), starting the nitrogen injection device, conveying nitrogen to the simulated tunneling working face pipeline (29) through the pipeline VIII (4) by the nitrogen injection machine, pumping out air of the simulated tunneling working face pipeline (29) by the fan I (15), continuously replacing the nitrogen with the closed space of the simulated tunneling working face, and when O in the closed space of the simulated tunneling working face is detected2After the numerical value of the sensor (10) is approximate to 0, suspending the fan I (15), closing the switch VI (18), and simultaneously closing the nitrogen injection device to recover to a normal production tunneling state;
fourthly, after the experiment is finished, removing gas in the airtight space of the simulated driving face, cleaning an experiment system, cleaning impurities generated in the experiment system, and recovering the initial state;
fourthly, carrying out simulation experiments on various conditions: and (4) combining the two single simulation experiments in the step (III) and performing a circulating experiment.
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