CN108756996B - Mine hot and humid environment simulation experiment platform - Google Patents

Abstract

The invention discloses a mine thermal and humid environment simulation experiment platform, comprising a control unit, an air pretreatment unit, an air cooling and dehumidification unit, a roadway temperature control unit, an air working condition measurement and control unit and a spray humidification unit; the control unit includes a central controller, a Pretreatment controller, dehumidification controller, thermostat and water spray controller; air pretreatment unit is used to pretreat outside air. The air cooling and dehumidification unit is used for cooling and dehumidifying the air output by the air pretreatment unit. The roadway temperature control unit is used to heat and control the temperature of the wall of the roadway. The air condition measurement and control unit is used to detect the temperature, humidity and wind speed in the tunnel. The spray humidification unit is used to humidify the air in the tunnel. The mine thermal and humid environment simulation experiment platform of the invention has the advantages of being able to simulate the summer working conditions of the excavation roadway in summer and winter respectively, and the simulation effect is good.

Description

An experimental platform for mine thermal and humid environment simulation

technical field

The invention relates to a simulation experiment platform, in particular to a mine thermal and humid environment simulation experiment platform.

Background technique

Environmental simulation is the application of system analysis principles to establish a theoretical or physical model of an environmental system, and to observe the response of the model by changing specific parameters under artificial control conditions to predict the behavior and characteristics of the actual system. Environmental simulation test exposes the product to natural or artificial environmental conditions to evaluate the performance of the product under the environmental conditions of actual use, transportation and storage, and analyzes and studies the degree of influence of environmental factors and its mechanism of action. The premise of environmental experiments is to establish a platform to simulate the real environment, to simulate the system of the real environment, and to obtain a simulation environment that is exactly the same or basically close to the real environment.

With the gradual increase of the mining depth of the mine, the heat dissipation and moisture dissipation of the surrounding rock in the fully mechanized mining face are increasing, which makes the problem of high temperature and high humidity in the fully mechanized mining face in the mine more and more serious. Especially in deep wells with a depth of more than 500 meters, there are various complex heat release, heat exchange and heat diffusion processes from surrounding rock walls, materials, machinery and equipment, etc., which make the air environment in the deep well change greatly. It is also constantly changing, which makes the thermal and humid environment of deep wells unstable.

The Chinese utility model with the application number of 201521105837.9 discloses a thermal and humid environment simulation experimental device for a fully mechanized mining face in a mine, including a model body, a heat source simulation device, a moisture source simulation device, an air treatment device and a data acquisition system. The heat source and humidity source simulation device is set inside the model body, and the inlet of the simulation body is connected to the air treatment equipment through a reducing pipe. There are environmental test points at equal intervals in the model body, and the data acquisition system collects the wind speed, temperature and humidity. By measuring the relevant data in the simulated fully mechanized mining face, under different ventilation and cooling methods, the distribution law of airflow velocity, temperature and humidity in the fully mechanized mining face can be completed, and the criterion correlation formula for obtaining air convection heat transfer and moisture transfer can be completed. However, this experimental device has a relatively simple structure and a single simulation method, and cannot simulate different working conditions in summer or winter environments.

SUMMARY OF THE INVENTION

In order to avoid the deficiencies existing in the above-mentioned prior art, the present invention provides a simulation experiment platform for the thermal and humid environment of the mine, so as to simulate different working conditions of the humid and hot environment of the mine.

The present invention adopts the following technical solutions to solve the technical problems.

A mine thermal and humid environment simulation experiment platform is characterized in its structure, including a control unit, an air pretreatment unit, an air cooling and dehumidification unit, a roadway temperature control unit, an air condition measurement and control unit and a spray humidification unit;

The control unit includes a central controller, a pretreatment controller, a dehumidification controller, a temperature controller and a water spray controller, which are used to control the air pretreatment unit, the air cooling and dehumidification unit, the roadway temperature control unit, and the air condition measurement and control unit. and spray humidification unit;

The air pretreatment unit is used to pretreat the outside air and output air that reaches a preset target temperature;

The air cooling and dehumidification unit is used to cool and dehumidify the air output by the air pretreatment unit, so that the temperature and humidity of the air output to the local fan reaches the moisture content of the supply air of the tunnel;

The roadway temperature control unit is used for heating and temperature control of the wall surface of the roadway, so that the temperature of the wall surface of the roadway reaches a stable preset temperature value;

The air condition monitoring and control unit is used to detect the temperature, humidity and wind speed in the tunnel and send it to the control unit;

The spray humidification unit is used for humidifying the air in the tunnel so that the humidity of the air reaches a preset humidity.

The structural characteristics of a mine thermal-humid environment simulation experiment platform of the present invention are also as follows:

The air pretreatment unit includes a first chiller, a first circulating pump, a first valve, a second valve, a first heat exchanger, a second circulating pump, a third valve, a fourth valve, a cooling tower, and a fifth valve , air conditioning box, filter, preheater, water spray chamber, heater, local fan, first damper, second damper and mixing chamber.

The air cooling and dehumidification unit includes a third circulation pump, a sixth valve, a seventh valve, an eighth valve, a ninth valve, a cooling tower, a second chiller, a fourth circulation pump, a second heat exchanger and a tenth valve .

The roadway temperature control unit includes a power regulator, a roadway heating pipe and a wall surface thermocouple; the excavation roadway includes a steel plate, a rock wool layer and a color steel plate.

The rock wool layer is arranged between the steel plate and the color steel plate; the tunnel heating pipe and the wall surface thermocouple are attached to the contact surface of the steel plate and the rock wool layer.

The air condition measurement and control unit includes a temperature and humidity sensor, a wind speed sensor and a data collector; the temperature and humidity sensor and the wind speed sensor are all connected with the data collector, and the data collector is connected with a desktop computer, and the measured The temperature and humidity values and wind speed values are sent to the desktop computer.

The spray humidification unit includes a spray head group, a booster pump, a water storage tank and a flow meter.

The water in the water storage tank is purified water.

The sprinkler group includes a top plate sprinkler group, a bottom plate sprinkler group and a wind flow humidification sprinkler group.

Compared with the prior art, the beneficial effects of the present invention are reflected in:

The invention discloses a mine thermal and humid environment simulation experiment platform, comprising a control unit, an air pretreatment unit, an air cooling and dehumidification unit, a roadway temperature control unit, an air working condition measurement and control unit and a spray humidification unit; the control unit includes a central controller, a Pretreatment controller, dehumidification controller, thermostat and water spray controller; air pretreatment unit is used to pretreat outside air. The air cooling and dehumidification unit is used for cooling and dehumidifying the air output by the air pretreatment unit. The roadway temperature control unit is used to heat and control the temperature of the wall of the roadway. The air condition measurement and control unit is used to detect the temperature, humidity and wind speed in the tunnel. The spray humidification unit is used to humidify the air in the tunnel.

The mine thermal-humid environment simulation experiment platform of the invention has the advantages of being able to simulate the summer working conditions of the excavation roadway in summer and winter respectively, and the simulation effect is good.

Description of drawings

Fig. 1 is a flow chart of a mine thermal and humid environment simulation experiment platform of the present invention.

FIG. 2 is a schematic diagram of the temperature, humidity and wind speed measurement and water spray technology in the tunneling tunnel of a mine thermal and humid environment simulation experiment platform of the present invention.

3 is a schematic structural diagram (front view) of a tunnel temperature control unit of a mine thermal and humid environment simulation experiment platform of the present invention.

4 is a schematic structural diagram (sectional view) of a tunnel temperature control unit of a mine thermal and humid environment simulation experiment platform of the present invention.

5 is a schematic diagram of the arrangement of the roof humidification and bottom humidification sprinkler groups in the tunnel of a mine thermal and humid environment simulation experiment platform of the present invention.

6 is a schematic diagram of the arrangement of the wind flow humidification nozzle groups in the tunnel of a mine thermal and humid environment simulation experiment platform of the present invention.

7 is a schematic diagram of the cross-sectional arrangement of temperature, humidity, and wind speed sensors of a mine thermal-humidity environment simulation experiment platform of the present invention.

The present invention will be further described below through specific embodiments and in conjunction with the accompanying drawings.

Detailed ways

Referring to Fig. 1-Fig. 7, a mine thermal and humid environment simulation experiment platform of the present invention includes a control unit, an air pretreatment unit, an air cooling and dehumidification unit, a roadway temperature control unit, an air condition measurement and control unit, and a spray humidification unit;

The control unit includes a central controller, a pretreatment controller, a dehumidification controller, a temperature controller and a water spray controller, which are used to control the air pretreatment unit, the air cooling and dehumidification unit, the roadway temperature control unit, and the air condition measurement and control unit. and spray humidification unit;

The air pretreatment unit is used to pretreat the outside air and output air that reaches a preset target temperature;

The air cooling and dehumidification unit is used to cool and dehumidify the air output by the air pretreatment unit, so that the temperature and humidity of the air output to the local fan reaches the moisture content of the supply air of the tunnel;

The roadway temperature control unit is used for heating and temperature control of the wall surface of the roadway, so that the temperature of the wall surface of the roadway reaches a stable preset temperature value;

The air condition monitoring and control unit is used to detect the temperature, humidity and wind speed in the tunnel and send it to the control unit;

The spray humidification unit is used for humidifying the air in the tunnel so that the humidity of the air reaches a preset humidity.

A mine thermal and humid environment simulation experiment platform of the present invention, through the control unit, the air pretreatment unit, the air cooling and dehumidification unit, the roadway temperature control unit, the air working condition measurement and control unit and the spray humidification unit, in the simulated excavation roadway. The temperature and humidity of the air are adjusted to simulate the temperature and humidity of the real working environment. In addition, the simulation of summer conditions can be realized in both summer and winter through the control unit. Experiments show that the mine thermal-humid environment simulation experiment platform of the present invention can simulate the summer working conditions of the excavation roadway in summer and winter respectively, and the simulation effect is good.

The air pretreatment unit includes a first chiller, a first circulating pump, a first valve, a second valve, a first heat exchanger, a second circulating pump, a third valve, a fourth valve, a cooling tower, and a fifth valve , air conditioning box, filter, preheater, water spray chamber, heater, local fan, first damper, second damper and mixing chamber. The connection relationship of each component/assembly of the air pretreatment unit of the present invention is shown in FIG. 1 .

The air cooling and dehumidification unit includes a third circulation pump, a sixth valve, a seventh valve, an eighth valve, a ninth valve, a cooling tower, a second chiller, a fourth circulation pump, a second heat exchanger and a tenth valve . The connection relationship of each component/component of the air cooling and dehumidification unit of the present invention is shown in FIG. 1 .

The roadway temperature control unit includes a power regulator, a roadway heating pipe and a wall surface thermocouple; the excavation roadway includes a steel plate, a rock wool layer and a color steel plate.

The rock wool layer is arranged between the steel plate and the color steel plate; the tunnel heating pipe and the wall surface thermocouple are attached to the contact surface of the steel plate and the rock wool layer. The connection relationship of each component/assembly of the roadway temperature control unit of the present invention is shown in FIG. 1 , FIG. 3 and FIG. 4 .

The air condition measurement and control unit includes a temperature and humidity sensor, a wind speed sensor and a data collector; the temperature and humidity sensor and the wind speed sensor are all connected with the data collector, and the data collector is connected with a desktop computer, and the measured The temperature and humidity values and wind speed values are sent to the desktop computer. As shown in FIGS. 2 and 7 , the data collector 703 collects the air flow temperature and humidity data transmitted by the temperature and humidity sensor 701 and the wind speed data transmitted by the wind speed sensor 702, and stores them in a desktop computer to accumulate data for subsequent experimental analysis.

The spray humidification unit includes a spray head group, a booster pump, a water storage tank and a flow meter. As shown in FIG. 2 , FIG. 5 and FIG. 6 , the water spray controller 604 receives the water spray data from the central controller 600 , starts the booster pump 802 , extracts purified water from the water storage tank 803 , and passes through the flow meter 804 after pressurization. into the nozzle group 801. The water spray controller 604 compares the received water spray pressure and flow rate by detecting the signals of the flow meter 804 and the pressure sensor 805, and continuously adjusts the input AC frequency of the booster pump 802 until the pump water flow and pressure of the booster pump reach set value.

The water in the water storage tank is purified water.

The sprinkler group includes a top plate sprinkler group, a bottom plate sprinkler group and a wind flow humidification sprinkler group. The distribution of the top plate sprinkler group, the bottom plate sprinkler group and the airflow humidification sprinkler group is shown in Figures 5-6.

A mine thermal and humid environment simulation experiment platform of the present invention includes a control unit, an air pretreatment unit, an air cooling and dehumidification unit, a roadway temperature control unit, an air working condition measurement and control unit, and a spray humidification unit, which is used to conduct temperature, Humidity treatment, so that its index reaches the air supply temperature and humidity of the tunnel 503.

A mine thermal and humid environment simulation experiment platform of the present invention has the following two working modes: a summer mode and a winter mode. Summer mode is used to simulate summer conditions in roadways in summer, while winter mode is used to simulate summer conditions in roadways in winter.

In the summer mode, the outdoor fresh air temperature is high and the humidity is high, so there is no need to heat the outdoor in the preheater 113, that is, the valves 103, 108, 202, and 204 are closed, and the valves 104, 107, 203, and 205 are opened, and the first The first damper 117 is opened and the second damper 118 is closed. The air is filtered in the filter 112, passes through the preheater 113 (not preheated) and the mixing chamber 119 (no primary circulating air enters) and enters the water spray chamber 114, the air is cooled and dehumidified by spraying cold water, and then the air flow enters the heater 115 It is heated in the middle, and the air condition is adjusted to the air flow condition of the mine road.

Workflow of the air pretreatment unit in summer mode: the central controller 600 sends the local fan 116 activation, the first chiller activation, and monitoring air temperature and humidity signals in the air conditioning box 111 and the air duct to the pretreatment controller 100 . The pretreatment controller 100 sends a start signal to the first chiller 101 , the first circulation pump 102 , the second circulation pump 106 , the local fan 116 , and the first cooling tower 109 , and sends a close signal to the fourth valve 108 and the second damper 118 , send an opening signal to the second valve 104, the third valve 107, and the first damper 117; when the local fan 116 determines the air flow, the preprocessing controller 100 continuously sends a signal to the first valve 103 to adjust the air flow in the spray chamber 113. The amount of water sprayed until the moisture content of the air at the outlet of the spray chamber 113 reaches the air moisture content standard required by the main alley; after the cold water after the action converges, it re-enters the chiller. The pretreatment controller 100 continuously sends signals to the fifth valve 110 to adjust the flow of hot water through the heater 115 until the air temperature at the outlet of the heater 115 reaches the air temperature standard required by the aisle, and the hot water after the action enters the first cooling tower The 109 is further cooled before re-entering the chiller.

Working process of air cooling and dehumidification unit in summer mode: In order to make the air in the alley reach a lower supply air temperature and moisture content, the dehumidification controller 200 receives the signal sent by the central controller 600, turns on the second chiller 207, and starts the third cycle The pump 201 and the fourth circulating pump 208, close the valves 202 and 204, and open the valves 203 and 205. The dehumidification controller 200 continuously adjusts the input AC frequency of the second chiller 207, the third circulating pump 201 and the fourth circulating pump 208, The temperature of the cold water delivered to the surface cooler 209 is adjusted, and the air is further cooled and dehumidified by the surface cooler 209 until the moisture content of the air flow entering the local fan 116 reaches the moisture content of the supply air of the tunnel 503 .

Work flow of the roadway temperature control unit in summer mode: According to the simulated roadway wall temperature requirements, the central controller 600 sends a wall preset temperature signal to the thermostat 500, and the thermostat 500 detects the inner wall surface of the roadway 503 through the wall thermocouple 504 The temperature, according to the temperature signal, sends a power adjustment signal to the power regulator 501, continuously adjusts the heating power of the roadway heater 502, and adjusts through multiple cycles until the roadway wall temperature detected by the wall thermocouple is stable and reaches the central controller 600. The preset wall temperature signal sent to the thermostat 500.

The working process of the air condition measurement and control unit in the summer mode: the temperature and humidity sensor 701 and the wind speed sensor 702 are arranged in the plane of the tunnel 503 perpendicular to the wind flow direction, and the data collector 703 collects the wind flow temperature and humidity data transmitted by the temperature and humidity sensor 701, and the wind speed sensor 702 The transmitted wind speed data is converted into temperature, humidity and wind speed signals and stored in a desktop computer to accumulate data for subsequent experimental analysis.

The working flow of the spray humidification unit in summer mode: the water spray controller 604 receives the water spray data from the central controller 600, starts the booster pump 802, extracts purified water from the water storage tank 803, and sends it to the spray head through the flow meter 804 after pressurization Group 801. The water spray controller 604 compares the received water spray pressure and flow rate by detecting the signals of the flow meter 804 and the pressure sensor 805, and continuously adjusts the input AC frequency of the booster pump 802 until the pump water flow and pressure of the booster pump reach set value.

In winter mode, in winter, the outdoor fresh air temperature is low and the humidity is low, so it is necessary to preheat the outdoor air, and then use the primary circulating air to adjust the air humidity. The outdoor fresh air is preheated in the preheater 113 after passing through the filter 112, that is, the valves 104, 108, 203 and 204 are closed, the valves 103, 107, 202, 205 and 212 are opened, and the first damper 117 and the second damper 118 are opened. The air is filtered in the filter 112, preheated by the preheater 113, and then enters the mixing chamber to be mixed with the return air (primary circulating air) of the roadway. , the wind flow enters the heater 115 to be heated, and the air condition is adjusted to the wind flow condition of the mine road.

Workflow of the air pretreatment unit in winter mode: the central controller 600 sends the local fan 116 activation, the first chiller 101 activation, and the detection of air temperature and humidity signals in the air conditioning box 111 and the air duct to the pretreatment controller 100 . The pretreatment controller 100 sends a start signal to the first chiller unit 101 , the first circulation pump 102 , the second circulation pump 106 , the local fan 116 , and the first cooling tower 109 , and sends a close signal to the second valve 104 and the fourth valve 108 , send an opening signal to the first damper 117, the second damper 118, the second valve 103, and the third valve 107; when the local fan 116 determines the wind flow, the preprocessing controller 100 continuously sends the second damper 117, the second damper 118 Send a signal to adjust the primary circulating air flow entering the mixing chamber 119 until the moisture content of the air at the outlet of the mixing chamber 119 reaches the air moisture content standard required by the main road; the pretreatment controller 100 continuously sends a signal to the fifth valve 110 to adjust the The hot water flow of the heater 115 is until the outlet air temperature of the heater 115 reaches the air temperature standard required by the main road, and the hot water after the action enters the first cooling tower 109 to be further cooled, and then re-enters the chiller.

Working process of air cooling and dehumidification unit in winter mode: In order to make the air in the alley reach a lower supply air temperature and moisture content, the dehumidification controller 200 receives the signal sent by the central controller 600, turns on the second chiller 207, and starts the circulation pump 201 , 208, close the valves 203, 204, open the valves 202, 205, the dehumidification controller 200 adjusts the input AC frequency of the second chiller 207, the third circulating pump 201 and the fourth circulating pump 208 by continuously adjusting the frequency of the input AC power delivered to the surface cooler 209, the air is cooled and dehumidified by the surface cooler 209 until the moisture content of the air flow entering the local fan 116 reaches the moisture content of the supply air of the tunnel 503.

Work flow of the roadway temperature control unit in winter mode: According to the simulated roadway wall temperature requirements, the central controller 600 sends a wall preset temperature signal to the thermostat 500, and the thermostat 500 detects the inner wall surface of the roadway 503 through the wall thermocouple 504 The temperature, according to the temperature signal, sends a power adjustment signal to the power regulator 501, continuously adjusts the heating power of the roadway heater 502, and adjusts through multiple cycles until the roadway wall temperature detected by the wall thermocouple is stable and reaches the central controller 600. The preset wall temperature signal sent to the thermostat 500.

The working process of the air condition measurement and control unit in winter mode: the temperature and humidity sensor 701 and the wind speed sensor 702 are arranged in the plane of the tunnel 503 perpendicular to the wind flow direction, and the data collector 703 collects the wind flow temperature and humidity data transmitted by the temperature and humidity sensor 701, and the wind speed sensor 702 The transmitted wind speed data is converted into temperature, humidity and wind speed signals and stored in a desktop computer to accumulate data for subsequent experimental analysis.

The working process of the spray humidification unit in winter mode: according to the needs of humidification conditions, the water spray controller 604 starts the booster pump 802 from the central controller, extracts purified water from the water storage tank 803, and sends it through the flow meter 804 after pressurization. Nozzle group 801. The water spray controller 604 compares the received water spray pressure and flow rate by detecting the signals of the flow meter 804 and the pressure sensor 805, and continuously adjusts the input AC frequency of the booster pump 802 until the pump water flow and pressure of the booster pump reach set value.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, which are therefore intended to fall within the scope of the appended claims. All changes within the meaning and range of the equivalents of , are included in the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (5)

1. A working method of a mine hot and humid environment simulation experiment platform is characterized in that the mine hot and humid environment simulation experiment platform comprises a control unit, an air pretreatment unit, an air cooling and dehumidifying unit, a roadway temperature control unit, an air working condition measurement and control unit and a spray humidifying unit;

the control unit comprises a central controller, a pretreatment controller, a dehumidification controller, a temperature controller and a water spraying controller and is used for controlling the air pretreatment unit, the air cooling and dehumidification unit, the roadway temperature control unit, the air working condition measurement and control unit and the spray humidification unit;

the air pretreatment unit comprises a first water chilling unit, a first circulating pump, a first valve, a second valve, a first heat exchanger, a second circulating pump, a third valve, a fourth valve, a first cooling tower, a fifth valve, an air conditioning box, a filter, a preheater, a water spray chamber, a heater, a local fan, a first air door, a second air door and a mixing chamber, and is used for pretreating external air and outputting air reaching a preset target temperature;

the air cooling and dehumidifying unit comprises a third circulating pump, a sixth valve, a seventh valve, an eighth valve, a ninth valve, a second cooling tower, a second water chilling unit, a fourth circulating pump, a surface air cooler and a tenth valve and is used for cooling and dehumidifying the air output by the air preprocessing unit so that the temperature and humidity of the air output to the local fan reach the air supply moisture content of the driving tunnel;

the roadway temperature control unit comprises a power regulator, a roadway heating pipe and a wall surface thermocouple, and is used for heating and controlling the temperature of the wall surface of the tunneling roadway so that the temperature of the wall surface of the tunneling roadway reaches a stable preset temperature value; the tunneling roadway comprises a steel plate, a rock wool layer and a color steel plate;

the air working condition measurement and control unit comprises a temperature and humidity sensor, a wind speed sensor and a data collector and is used for detecting the temperature, humidity and wind speed in the driving tunnel and sending the temperature, humidity and wind speed to the control unit;

the spraying and humidifying unit comprises a nozzle group, a booster pump, a water storage tank and a flowmeter and is used for humidifying air in the driving roadway to enable the humidity of the air to reach preset humidity;

through the control unit, air preprocessing unit, air cooling dehumidification unit, tunnel accuse temperature unit, air operating mode measurement and control unit and spraying humidification unit, when summer and winter, the homoenergetic realizes the simulation of summer operating mode to the tunnelling:

the mine thermal-wet environment simulation experiment platform has the following two working modes: summer mode and winter mode; the summer mode is used for simulating summer working conditions in the roadway in summer, and the winter mode is used for simulating summer working conditions in the roadway in winter;

in the summer mode, the first valve, the fourth valve, the sixth valve and the eighth valve are closed, the second valve, the third valve, the seventh valve and the ninth valve are opened, and the first air door is opened and the second air door is closed; filtering air in a filter, enabling the air to enter a water spraying chamber through a non-preheated preheater and a mixing chamber without primary circulating air, enabling the air to be cooled and dehumidified by spraying cold water, enabling air flow to enter a heater to be heated, and adjusting the working condition of the air to the working condition of the air flow of a mine roadway;

air pretreatment unit work flow in summer mode: the central controller sends local fan starting, first water chilling unit starting and air temperature and humidity signals for monitoring all positions in the air conditioning box and the air duct to the preprocessing controller; the pretreatment controller sends starting signals to the first water chilling unit, the first circulating pump, the second circulating pump, the local fan and the first cooling tower, sends closing signals to the fourth valve and the second air door, and sends opening signals to the second valve, the third valve and the first air door; under the condition that the local fan determines the air flow, the preprocessing controller continuously sends a signal to the first valve, and adjusts the water spraying amount in the water spraying chamber until the air moisture content at the outlet of the water spraying chamber reaches the air moisture content standard required by a large roadway; the acted cold water is converged and then enters the first water chilling unit again; the preprocessing controller continuously sends signals to the fifth valve, adjusts the flow of hot water passing through the heater until the air temperature at the outlet of the heater reaches the air temperature standard required by the main roadway, and the acted hot water enters the first cooling tower to be further cooled and then enters the first water chilling unit again;

air cooling dehumidification unit work flow in summer mode: in order to enable the air in the main roadway to reach lower air supply temperature and moisture content, the dehumidification controller receives a signal sent by the central controller, the second water chilling unit is started, the third circulating pump and the fourth circulating pump are started, the sixth valve and the eighth valve are closed, the seventh valve and the ninth valve are opened, the dehumidification controller adjusts the temperature of cold water conveyed to the surface cooler by continuously adjusting the input alternating current frequency of the second water chilling unit, the third circulating pump and the fourth circulating pump, and further cools and dehumidifies the air by the surface cooler until the moisture content of airflow entering the local fan reaches the air supply moisture content of the driving roadway;

in summer mode, the working process of the roadway temperature control unit is as follows: according to the requirement of the simulated temperature of the wall surface of the roadway, the central controller sends a wall surface preset temperature signal to the temperature controller, the temperature controller detects the temperature of the inner wall surface of the tunneling roadway through the wall surface thermocouple, sends a power adjusting signal to the power adjuster according to the temperature signal, continuously adjusts the heating power of the roadway heater, and adjusts the temperature through multiple cycles until the temperature of the wall surface of the roadway detected by the wall surface thermocouple is stable and reaches the preset wall surface temperature signal sent to the temperature controller by the central controller;

working process of the air working condition measurement and control unit in summer mode: a temperature and humidity sensor and a wind speed sensor are arranged in a plane of a driving tunnel perpendicular to the direction of wind flow, a data collector collects wind flow temperature and humidity data transmitted by the temperature and humidity sensor and wind speed data transmitted by the wind speed sensor, and the wind flow temperature and humidity data and the wind speed data are converted into temperature, humidity and wind speed signals and then stored in a desktop computer to analyze and accumulate data for subsequent experiments;

spray humidification unit work flow in summer mode: the water spray controller receives water spray data from the central controller, starts the booster pump, extracts purified water from the water storage tank, and sends the purified water into the spray head group through the flowmeter after pressurization; the water spraying controller compares the signals of the flow meter and the pressure sensor with the received water spraying pressure and flow, and continuously adjusts the input alternating current frequency of the booster pump until the water pumping flow and the pressure of the booster pump reach set values;

in the winter mode, outdoor fresh air passes through the filter and then is preheated in the preheater, namely the second valve, the fourth valve, the seventh valve and the eighth valve are closed, the first valve, the third valve, the sixth valve, the ninth valve and the tenth valve are opened, and the first air door and the second air door are opened; air is filtered in a filter, preheated by a preheater, enters a mixing chamber to be mixed with return air of a roadway, outdoor fresh air is humidified by primary circulating air, air flow enters a heater to be heated through a water spraying chamber without spraying water, and the working condition of the air is adjusted to the working condition of the air flow of a mine roadway;

air pretreatment unit work flow in winter mode: the central controller sends local fan starting, first water chilling unit starting and air temperature and humidity signals for detecting all positions in the air conditioning box and the air duct to the preprocessing controller; the pretreatment controller sends starting signals to the first water chilling unit, the first circulating pump, the second circulating pump, the local fan and the first cooling tower, sends closing signals to the second valve and the fourth valve, and sends opening signals to the first air door, the second air door, the first valve and the third valve; under the condition that the local fan determines the air flow, the preprocessing controller continuously sends signals to the first air door and the second air door, and adjusts the primary circulating air flow entering the mixing chamber until the air moisture content at the outlet of the mixing chamber reaches the air moisture content standard required by a main roadway; the preprocessing controller continuously sends signals to the fifth valve, adjusts the flow of hot water passing through the heater until the air temperature at the outlet of the heater reaches the air temperature standard required by the main roadway, and the acted hot water enters the first cooling tower to be further cooled and then enters the first water chilling unit again;

air cooling dehumidification unit work flow among the winter mode: in order to enable the air in the main roadway to reach lower air supply temperature and moisture content, the dehumidification controller receives a signal sent by the central controller, the second water chilling unit is started, the third circulating pump and the fourth circulating pump are started, the seventh valve and the eighth valve are closed, the sixth valve and the ninth valve are opened, the dehumidification controller adjusts the temperature of cold water conveyed to the surface cooler by continuously adjusting the input alternating current frequency of the second water chilling unit, the third circulating pump and the fourth circulating pump, and cools and dehumidifies the air through the surface cooler until the moisture content of airflow entering the local fan reaches the air supply moisture content of the tunneling roadway;

working process of the roadway temperature control unit in the winter mode: according to the requirement of the simulated temperature of the wall surface of the roadway, the central controller sends a wall surface preset temperature signal to the temperature controller, the temperature controller detects the temperature of the inner wall surface of the tunneling roadway through the wall surface thermocouple, sends a power adjusting signal to the power adjuster according to the temperature signal, continuously adjusts the heating power of the roadway heater, and adjusts the temperature through multiple cycles until the temperature of the wall surface of the roadway detected by the wall surface thermocouple is stable and reaches the preset wall surface temperature signal sent to the temperature controller by the central controller;

working process of the air working condition measurement and control unit in the winter mode: a temperature and humidity sensor and a wind speed sensor are arranged in a plane of a driving tunnel perpendicular to the direction of wind flow, a data collector collects wind flow temperature and humidity data transmitted by the temperature and humidity sensor and wind speed data transmitted by the wind speed sensor, and the wind flow temperature and humidity data and the wind speed data are converted into temperature, humidity and wind speed signals and then stored in a desktop computer to analyze and accumulate data for subsequent experiments;

spray humidification unit work flow in winter mode: according to the requirement of the humidifying working condition, the water spraying controller starts a booster pump from the central controller, extracts purified water from the water storage tank, and sends the purified water into the spray head group through a flowmeter after pressurization; the water spraying controller compares the received water spraying pressure and flow by detecting signals of the flow meter and the pressure sensor, and continuously adjusts the input alternating current frequency of the booster pump until the water pumping flow and the pressure of the booster pump reach set values.

2. The working method of the mine hot and humid environment simulation experiment platform according to claim 1, wherein the rock wool layer is arranged between a steel plate and a color steel plate; and the roadway heating pipe and the wall surface thermocouple are both attached to the contact surface of the steel plate and the rock wool layer.

3. The working method of the mine hot and humid environment simulation experiment platform according to claim 1, wherein the temperature and humidity sensor and the wind speed sensor are both connected with the data acquisition unit, the data acquisition unit is connected with a desktop computer, and the measured temperature and humidity values and the measured wind speed values are sent to the desktop computer.

4. The working method of the mine hot and humid environment simulation experiment platform according to claim 1, wherein the water in the water storage tank is purified water.

5. The working method of the mine hot and humid environment simulation experiment platform according to claim 1, wherein the nozzle group comprises a top plate nozzle group, a bottom plate nozzle group and an airflow humidifying nozzle group.

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