A device for verifying the synergistic migration of heavy metal ions and water vapor in gangue backfill materials

Abstract

This invention discloses a verification device for the synergistic migration of heavy metal ions with water vapor in gangue backfill materials, belonging to the field of coal mining technology. The device includes a constant-temperature sealed chamber, an electric heating device, a gangue holding area, a fractured rock mass area, an electronic crane scale, a water tank, and multiple sampling components. Based on the real-time weight of the fractured rock mass specimen and multiple water vapor samples, the heavy metal ion concentration at different locations of the specimen during water vapor migration is detected to verify the reliability of the numerical simulation model. The numerical simulation model is used to simulate the migration process of the fractured rock mass specimen with water vapor, obtaining the heavy metal ion concentration and specimen weight at different locations from various water vapor samples. When the error between the experimental data and the numerical simulation data is less than the error threshold, the numerical simulation model is used to simulate the synergistic migration behavior of heavy metal ions with water vapor in gangue backfill materials. This method can verify the reliability of the numerical simulation model.

Description

Technical Field

[0001] This invention relates to the field of coal mining technology, and more specifically to a device for verifying the synergistic migration of heavy metal ions and water vapor in gangue backfill materials. Background Technology

[0002] With the rapid development of my country's economy, the demand for coal resources, as a basic energy source and an important industrial raw material, has gradually increased. The intensity of coal mining has been expanding, resulting in the accumulation of gangue on the surface, which wastes land resources and causes pollution to the surrounding soil and water bodies. Furthermore, the SO2 and CO2 gases produced by the spontaneous combustion of gangue also pollute the atmospheric environment. In addition, the cost of gangue disposal will seriously affect the economic benefits of enterprises.

[0003] Solid backfilling mining technology, as an environmentally friendly mining method, can effectively solve many problems caused by the accumulation of gangue on the surface, while also improving coal resource recovery rate, ensuring mining safety, and extending the service life of the mine. However, as gangue is massively filled into the goaf, heavy metal ions inside are in a state of secondary enrichment. At the same time, the gangue backfill body is in a closed, dark, humid environment with temperatures above normal for a long time. After being soaked in mine water for a long time, a large amount of heavy metal ions are released and precipitated. With the evaporation of mine water, these ions migrate upward along the water-conducting fracture zone of the roof, causing a certain degree of pollution to the overlying aquifer.

[0004] At present, research on the migration of heavy metal ions in gangue backfill mainly focuses on the migration of heavy metal ions from the surface-deposited gangue to the soil and groundwater under rainfall conditions. There is relatively little research on the upward migration of heavy metal ions in gangue backfill in conjunction with water vapor.

[0005] Furthermore, due to the limitations of the complex on-site environment and time constraints, all related studies have adopted numerical simulation methods. However, it is difficult to determine whether the numerical simulation model is reliable or whether the numerical simulation results are correct. Summary of the Invention

[0006] To address the problems existing in the above-mentioned fields, this invention proposes a verification device for the synergistic migration of heavy metal ions with water vapor in gangue backfill materials. This device is designed to study the migration behavior of fractured rock mass specimens at different locations as water vapor migrates, clarifying the upward migration ability and patterns of heavy metal ions at different locations. The device is also used to verify the reliability of the established numerical simulation model for the synergistic migration of heavy metal ions with water vapor in gangue backfill materials. By verifying the accuracy of the numerical simulation model, the accuracy of the numerical simulation results can be ensured.

[0007] To address the aforementioned technical problems, this invention discloses a device for verifying the synergistic migration of heavy metal ions and water vapor in gangue backfill materials, comprising a constant-temperature sealed chamber and a data calculation and control terminal:

[0008] The bottom of the constant-temperature sealed chamber is equipped with an electric heating device to simulate the temperature of the downhole working face. Above the electric heating device is a gangue holding area for placing gangue filling material and aqueous solution. Temperature sensors, humidity sensors, and liquid level sensors are installed inside the gangue holding area to measure the temperature, relative humidity, and liquid level inside the constant-temperature sealed chamber in real time. Above the gangue holding area is a fractured rock mass area for placing fractured rock mass specimens. The top of the constant-temperature sealed chamber is equipped with an electronic crane scale for measuring the real-time weight of the fractured rock mass specimens.

[0009] The gangue storage area is connected to a water tank for supplying deionized water solution to the gangue storage area; the water tank is connected to the gangue storage area via a connecting pipe, and a water pump and a flow meter are installed in the connecting pipe, the flow meter being used to control the supply flow rate of the deionized water solution;

[0010] The constant temperature sealed chamber is equipped with multiple collection devices, including: a first collection device located at the boundary between the gangue holding area and the fractured rock mass area, used to collect water vapor samples from the gangue holding area; a second collection device located at the top of the fractured rock mass area, used to collect water vapor samples from the top of the fractured rock mass specimen; and multiple third collection devices vertically distributed in the fractured rock mass area, used to collect water vapor samples from the internal fractures of the fractured rock mass specimen.

[0011] The data calculation and control terminal is connected to the temperature sensor, humidity sensor, liquid level sensor, electric heating device, electronic crane scale, water pump and flow meter respectively, and is used to control and adjust the temperature inside the constant temperature sealed chamber and the flow rate of the deionized water solution transported by the water tank, and to monitor the temperature, humidity, liquid position and real-time weight of the fractured rock mass specimen in real time.

[0012] The real-time weight of the fractured rock mass specimen and multiple water vapor samples are used to detect the heavy metal ion concentration of the fractured rock mass specimen at different locations as it migrates with water vapor, in order to verify the reliability of the numerical simulation model. The numerical simulation model is used to simulate the migration process of the fractured rock mass specimen with water vapor, and to obtain the heavy metal ion concentration and weight of the fractured rock mass specimen at different locations using multiple water vapor samples.

[0013] Preferably, the constant temperature sealed chamber is equipped with a first chamber door, a second chamber door, and multiple sampling holes:

[0014] The No. 1 box door is located at the top of the constant temperature sealed box and serves as the entrance for placing the fractured rock mass.

[0015] The No. 2 box door is located in the gangue storage area and serves as the entrance for placing gangue backing material and aqueous solution;

[0016] The No. 1 box door is equipped with an electronic crane scale for measuring the real-time weight of the fractured rock mass. The hook of the electronic crane scale is inserted into the constant temperature sealed box for lifting the fractured rock mass.

[0017] The first collecting element passes through the collecting hole to collect water vapor samples from the gangue storage area; the second collecting element passes through the collecting hole to collect water vapor samples from the top of the fractured rock mass specimen; multiple third collecting elements pass through multiple collecting holes other than the first and second collecting elements, and the collecting holes are equidistantly and vertically distributed in the fractured rock mass area to collect water vapor samples from the internal fractures of the fractured rock mass specimen.

[0018] Preferably, it also includes a method for verifying the synergistic migration of heavy metal ions and water vapor in gangue backfill materials, comprising the following steps:

[0019] Rock samples from the roof of the solid backfill mining face and gangue backfill material were collected. The temperature of the solid backfill mining face was obtained, and parameters related to the experimental and numerical simulation models were determined, including the size of the fractured rock mass specimens (which are consistent with the size of the fractured rock mass area), the fracture morphology of the fractured rock mass specimens, and the experimental time. t ;

[0020] Based on the size and fracture morphology of the fractured rock mass specimens, the collected rock samples from the roof of the solid filling mining face in the mining area were processed in size and fracture prefabricated to obtain fractured rock mass specimens.

[0021] Based on the temperature of the solid backfill mining face, the electric heating device is activated to simulate the temperature of the underground working face. When the temperature of the underground working face reaches the temperature of the solid backfill mining face, the fractured rock mass specimen is placed in the fractured rock mass area, and the hook rope is connected to the hook of the electronic crane scale to measure the real-time weight of the fractured rock mass specimen.

[0022] When the temperature inside the constant-temperature sealed chamber is constant at the temperature of the solid backfill mining face, the collected gangue backfill material is placed in the gangue storage area. The deionized aqueous solution is transported to the gangue storage area through the water tank, water pump and flow meter to carry out the heavy metal ion synergistic water vapor migration experiment of the gangue backfill material.

[0023] When the experiment reaches the experimental time t Subsequently, experimental time was collected using the first acquisition device, the second acquisition device, and multiple third acquisition devices. t Multiple water vapor samples were collected from different locations within the corresponding gangue storage area, the top of the fractured rock mass specimen, and the internal fractures of the fractured rock mass specimen. The experimental time was measured using the humidity sensor.t The corresponding relative humidity, real-time weight of the fractured rock mass specimen, and the environmental volume of various water vapors at different locations are used to determine the environmental volume of various water vapors at different locations as the volume of the gangue holding area excluding gangue filling material and deionized water. This volume is calculated using the volume of the gangue holding area and the liquid level measured by the liquid level sensor.

[0024] The concentration of heavy metal ions in various water vapor samples after condensation into water was determined. Based on the concentration and volume of heavy metal ions after condensation into water, the corresponding relative humidity obtained from the experiment, and the volume of various water vapor samples, the concentration of heavy metal ions in various water vapor samples at different locations obtained from the experiment was determined as the concentration of heavy metal ions in the water vapor state of the samples.

[0025] A numerical simulation model for the synergistic migration of heavy metal ions and water vapor in gangue backfill materials was established. The initial conditions and parameters of the numerical simulation model were set to be consistent with the experimental parameters. Numerical simulation was then performed to obtain the heavy metal ion concentration and the weight of fractured rock mass specimens at different locations using various water vapor samples.

[0026] When the average error between the real-time weight of various water vapor samples and the weight of the fractured rock mass specimens at different locations in the gangue holding area, the top of the fractured rock mass specimen, and the internal fractures of the fractured rock mass specimens obtained from the experiment, and the heavy metal ion concentration and weight of the fractured rock mass specimens at different locations simulated by the numerical simulation model are less than the error threshold, the numerical simulation model of the synergistic migration of heavy metal ions and water vapor in the gangue backing material of the mining area solid backing mining face is used to numerically simulate the synergistic migration process of heavy metal ions and water vapor in the gangue backing material.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] This invention proposes a verification device for the synergistic migration of heavy metal ions and water vapor in gangue backfill materials. The device comprises a constant-temperature sealed chamber, an electric heating device, a gangue holding area, a fractured rock mass area, an electronic crane scale, a water tank, and multiple sampling components. The electric heating device simulates the temperature of the underground working face, the electronic crane scale measures the real-time weight of the fractured rock mass specimen, and multiple sampling components collect water vapor samples from different locations within the gangue holding area, the top of the fractured rock mass specimen, and the internal fractures of the specimen. The migration behavior of the fractured rock mass specimen at different locations with the help of water vapor is studied. Based on the various water vapor samples collected from different locations and the real-time weight of the fractured rock mass specimen, the concentration of heavy metal ions and the real-time weight of the specimen at different locations with the help of water vapor migration are determined. This experimental device can clearly define the upward migration ability of heavy metal ions at different locations and the experimental patterns. A numerical simulation model for the synergistic migration of heavy metal ions and water vapor in gangue backfill materials was established. The initial conditions and parameters of the numerical simulation model were kept consistent with those of the experimental setup. The migration process of water vapor along fractured rock mass specimens was simulated, and the heavy metal ion concentrations and weights of various water vapor samples at different locations were obtained. The experimental results were compared with the simulation results obtained from the numerical simulation model to validate the model's accuracy and ensure the precision of the numerical simulation results. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the heavy metal ion synergistic water vapor migration device for gangue backfill material proposed in this invention.

[0030] Figure 2 This is a schematic diagram of the internal structure of the constant temperature sealed box proposed in this invention;

[0031] In the diagram: 1 is a constant temperature sealed chamber; 2 is a water tank; 3 is a data calculation and control terminal; 4 is the first chamber door; 5 is the second chamber door; 6 is a connecting pipe; 7 is a water pump; 8 is a flow meter; 9 is an electric heating device; 10 is a gangue storage area; 11 is a fractured rock mass area; 12 is a high-precision electronic crane scale; 13 is a data acquisition hole; 14 is a temperature sensor; 15 is a humidity sensor; 16 is a liquid level sensor. Detailed Implementation

[0032] The following will refer to the appendices in the embodiments of the present invention. Figures 1-2 The technical solutions in the embodiments of the present invention will be clearly and completely described. It should be understood that the terminology used in the present invention is only for describing particular implementation methods and is not intended to limit the present invention.

[0033] Example

[0034] like Figure 1As shown, this invention proposes a verification device for the synergistic migration of heavy metal ions and water vapor in gangue backfill materials, which includes a constant temperature sealed chamber 1;

[0035] An electric heating device 9 is installed at the bottom of the constant temperature sealed chamber 1 to control the temperature inside the chamber. Above the electric heating device 9 is a gangue holding area 10, used to place gangue filling material and aqueous solution. Temperature sensor 14, humidity sensor 15, and liquid level sensor 16 are installed inside the gangue holding area 10 to measure the temperature, relative humidity, and liquid level inside the chamber in real time. Above the gangue holding area 10 is a fractured rock mass area 11, used to place fractured rock mass specimens.

[0036] The constant temperature sealed box is equipped with a first door 4 and a second door 5. The first door 4 is located at the top of the constant temperature sealed box 1 and serves as the entrance for placing the fractured rock mass. The second door 5 is located at the gangue storage area 10 and serves as the entrance for placing the gangue filling material and the aqueous solution.

[0037] like Figure 2 As shown, a high-precision electronic crane scale 12 is installed on the first door 4 of the constant temperature sealed chamber 1, which is used to measure the real-time weight of the fractured rock mass specimen; the hook of the high-precision electronic crane scale 12 is inserted into the constant temperature sealed chamber 1 to lift the fractured rock mass.

[0038] The constant temperature sealed chamber 1 is equipped with multiple collection elements and six collection holes 13, including: a first collection element located at the junction of the gangue holding area 10 and the fractured rock mass area 11, used to collect water vapor samples from the gangue holding area; a second collection element located at the top of the fractured rock mass area 11, used to collect water vapor samples from the top of the fractured rock mass; and multiple third collection elements vertically and equidistantly distributed in the fractured rock mass area 11, used to collect water vapor samples from the fractures inside the fractured rock mass.

[0039] All six sampling holes 13 are connected to a constant-temperature sealed chamber 1. The first sampling device passes through one of the six sampling holes 13 to collect water vapor samples from the gangue storage area. The second sampling device passes through another of the six sampling holes 13 to collect water vapor samples from the top of the fractured rock mass specimen. Multiple third sampling devices pass through the remaining sampling holes, which are vertically and equidistantly distributed in the fractured rock mass area 11, to collect water vapor samples from the internal fissures of the fractured rock mass specimen.

[0040] The gangue storage area 10 of the constant temperature sealed chamber 1 is connected to a water tank 2 via a connecting pipe 6, which is used to supply deionized water solution to the gangue storage area 10. A water pump 7, which is a high-pressure diaphragm water pump, is installed in the connecting pipe 6; a flow meter 8 is also installed in the connecting pipe 6 to control the flow rate of the deionized water solution.

[0041] It also includes a data calculation and control terminal 3, which is connected to a temperature sensor 14, a humidity sensor 15, a liquid level sensor 16, an electric heating device 9, a high-precision electronic crane scale 12, a water pump 7, and a flow meter 8, respectively. It is used to control and adjust the temperature inside the constant temperature sealed chamber 1 and the flow rate of the deionized water solution transported by the water tank, and to monitor the temperature, humidity, liquid position, and real-time weight of the fractured rock mass specimen inside the constant temperature sealed chamber 1 in real time.

[0042] The working principle of the device is as follows: the real-time weight of the fractured rock mass specimen and multiple water vapor samples are used to detect the concentration of heavy metal ions at different locations of the fractured rock mass specimen as it migrates with water vapor, so as to verify the reliability of the numerical simulation model; the numerical simulation model is used to simulate the migration process of the fractured rock mass specimen with water vapor, and obtain the concentration of heavy metal ions and the weight of the fractured rock mass specimen at different locations of multiple water vapor samples.

[0043] In this embodiment, the overall height of the constant temperature sealed box 1 in the above-mentioned gangue filling material heavy metal ion synergistic water vapor migration verification device is 100cm and the diameter is 20cm. The internal electric heating device 9 of the constant temperature sealed box 1 is 10cm high, the gangue holding area 10 is 30cm high, and the fractured rock mass area 11 is 50cm high.

[0044] The distance between the fractured rock mass area 11 and the No. 1 box door 4 is 10cm. The temperature sensor 14, humidity sensor 15, and liquid level sensor 16 are located at the 28cm mark from the bottom up in the gangue storage area 10.

[0045] Of the six collection holes 13, the collection hole corresponding to the first collection component is located at the 0cm mark from the bottom up in the gangue holding area 10, the collection hole of the second collection component is located at the 6cm mark from the bottom up in the gangue holding area 10, and the four collection holes of the third collection component are located at the 12cm, 18cm, 24cm and 30cm marks from the bottom up in the gangue holding area 10, respectively.

[0046] Water tank 2 is 50cm high and 15cm in diameter. Water tank 2 is designed to be fully loaded with 3.52L. One end of the connecting pipe 6 is connected to the 0cm mark from the bottom of water tank 2, and the other end is connected to the 5cm mark from the bottom of water tank 2.

[0047] This example uses the aforementioned verification device for the synergistic migration of heavy metal ions and water vapor in gangue backfill materials. It also proposes a verification method for the synergistic migration of heavy metal ions and water vapor in gangue backfill materials. By comparing experimental data with data obtained from a numerical simulation model, when the error between the two is less than the error threshold, it indicates that the established numerical simulation model has sufficient reliability. Therefore, the established numerical simulation model can be used to numerically simulate the migration process of water vapor in fractured rock mass specimens. Specific operational steps include:

[0048] Step 1: Obtain experimental materials and parameters

[0049] Rock samples from the roof of the solid backfill mining face and gangue backfill material were collected on-site to obtain the temperature of the solid backfill mining face. k =25℃;

[0050] The relevant experimental parameters were determined, including the size of the fractured rock mass specimen, the fracture morphology of the fractured rock mass specimen, and the experimental time. t ;

[0051] The fractured rock mass specimen was the same size as the fractured rock mass zone 11 of the device; the specimen was 50 cm high and 20 cm in diameter, with the fractures perpendicular to the center of the specimen. The entire specimen was cut open, and the experimental time was... t =60 days;

[0052] Step 2: Preparation of fractured rock mass specimens

[0053] Based on the size and fracture morphology of the fractured rock mass specimens obtained in Step 1, the rock samples of the roof rock mass of the solid filling mining face collected in Step 1 were processed in size and fracture prefabricated.

[0054] According to the sampling hole position 13, the processed rock sample is further processed to reserve the position of sampling hole 13. Three sampling pieces will pass through the sampling hole and directly enter the fissure. Two hook ropes are fixed above the rock sample to obtain the fissure rock mass specimen.

[0055] Step 3: Experimental Procedure

[0056] Step 301: Based on the working surface temperature measured in Step 1 k =25℃, the electric heating device 9 is activated through the data calculation control terminal 3 to simulate the temperature of the underground working face;

[0057] Step 302: Wait until the temperature inside the constant temperature sealed chamber 1 reaches... k At 25℃, the fractured rock mass specimen prepared in step two is placed into the fractured rock mass area 11 through the entrance of box door 4, and the two hook ropes are connected to the hooks of the high-precision electronic crane scale 12.

[0058] Step 303: Measure the temperature inside the constant temperature sealed chamber 1 using a temperature sensor, and wait until the temperature inside the constant temperature sealed chamber 1 becomes constant. k At 25℃, the gangue backfill material collected in step one is placed into the gangue holding area 10 through the second box door 5, and deionized water is transported into the gangue holding area 10 through the water tank 2, water pump 7 and flow meter 8 to start the experiment of heavy metal ion synergistic water vapor migration of gangue backfill material.

[0059] Step 4: Sample and Data Acquisition

[0060] The experiment reached the time of step one. t Then, time was collected through six acquisition holes 13. t Six water vapor samples were collected and measured using a humidity sensor. t relative humidity at time ρ =94%, Real-time weight of fractured rock mass specimen m 1 = 32.9943 kg, and the environmental volume of the six types of water vapor at different locations, the environmental volume of the various types of water vapor at different locations is determined to be the volume of the gangue holding area excluding gangue filling material and deionized water, which is calculated by the volume of the gangue holding area 10 and the liquid level measured by the liquid level sensor 16.

[0061] Step 5: Sample Testing

[0062] Inductively coupled plasma diffraction (ICP-D) was used to analyze six water vapor samples collected in step four at different locations. The concentrations of heavy metal ions inside the six water vapor samples at different locations were determined to be as follows: c 1 = 0.672 mg / L c 2 = 0.513 mg / L c 3=0.397mg / L c 4 = 0.319 mg / L c 5 = 0.225 mg / L c 6 = 0.166 mg / L, where the concentration of heavy metal ions inside the six water vapor samples is the concentration of heavy metal ions after the water vapor condenses into water, and the measured heavy metal ion is Mn. 2+ ;

[0063] Step Six: Data Conversion

[0064] Calculate saturated water vapor pressure e :

[0065]

[0066] In the formula, k The temperature in Celsius inside the constant-temperature sealed chamber 1 is measured by temperature sensor 14. k =25℃;

[0067] Calculate actual water vapor pressure E :

[0068]

[0069] In the formula, ρ The experimental time was measured by humidity sensor 15. t The corresponding relative humidity, ρ=94%;

[0070] Calculate the absolute humidity as ρ w :

[0071]

[0072] In the formula, T Thermodynamic temperature T =273.15+ k ;

[0073] Calculate the mass of water vapor m 蒸 :

[0074]

[0075] Calculate the volume of water vapor v 蒸 :

[0076]

[0077] In the formula, ρ 水 The density of water;

[0078] Calculate the concentration of heavy metal ions inside the water vapor state. c 蒸 :

[0079]

[0080] In the above formula, c The concentrations of heavy metal ions inside six water vapor samples at different locations, obtained through testing in step five, include... c 1. c 2. c 3. c 4. c 5 and c 6;

[0081] Thus, the concentration of internal heavy metal ions under six different water vapor states at different locations was calculated. c 蒸1 =0.01453mg / L c 蒸2 =0.01110 mg / L c 蒸3 =0.00859mg / L c 蒸4 =0.00690mg / L c 蒸5 =0.00487mg / L c 蒸6=0.00359 mg / L;

[0082] Step 7: Simulation Verification: A numerical simulation model of the synergistic migration of heavy metal ions and water vapor in gangue backfill material was established using COMSOL Multiphysics numerical simulation software. The initial conditions and parameters of the numerical simulation model were set to be consistent with those of the experiment. The simulation was then conducted, and the heavy metal ion concentrations of six water vapor samples at different locations were obtained from the numerical simulation. c 数1 =0.01489mg / L c 数2 =0.01213mg / L c 数3 =0.00932mg / L c 数4 =0.00702mg / L c 数5 =0.00452mg / L c 数6 =0.00305mg / L, weight of fractured rock mass m 数 =31.3856kg;

[0083] The concentrations of heavy metal ions in six water vapor samples at different locations were obtained through numerical simulation. c 数1 =0.01489mg / L c 数2 =0.01213mg / L c 数3 =0.00932mg / L c 数4 =0.00702mg / L c 数5 =0.00452mg / L c 数6 =0.00305mg / L, weight of fractured rock mass m 数 =31.3856 kg and the real-time weight of the fractured rock mass specimen obtained in the experiment m 1. c 1 = 0.672 mg / L c 2 = 0.513 mg / L c 3=0.397mg / L c 4 = 0.319 mg / L c 5 = 0.225 mg / L c By comparing the values ​​of 6 = 0.166 mg / L, the average error of the data was calculated. σ =7.01%;

[0084] at this time, σ ≤10% (preset error threshold) indicates that the established numerical simulation model of heavy metal ion synergistic water vapor migration in gangue backfill material has sufficient reliability. This numerical simulation model can be used to conduct numerical simulation research on the heavy metal ion synergistic water vapor migration behavior of gangue backfill material in solid backfill mining face.

[0085] When σ > 10%, it indicates that the established numerical simulation model is inaccurate. The parameters of the numerical simulation model need to be modified and rebuilt, the numerical simulation needs to be carried out again and the data needs to be compared to determine the average error until the average error meets the error threshold requirement.

[0086] This invention proposes a device and method for verifying the synergistic migration of heavy metal ions and water vapor in gangue backfill materials. Through experimental research on the migration behavior of heavy metal ions and water vapor in fractures within gangue backfill materials, it clarifies the upward migration ability and patterns of heavy metal ions at different locations. A numerical simulation model is established to simulate the migration process of water vapor in fractured rock mass specimens, obtaining the heavy metal ion concentrations and weights of various water vapor samples at different locations. The average error between the numerical simulation data and the experimental data is obtained to verify the simulation results. By comparing the average error with an error threshold, when the average error of the numerical simulation data meets the error threshold requirement, it indicates that the established numerical simulation model has sufficient reliability. Furthermore, the fracture morphology within the fractured rock mass used in this invention can be customized as needed, broadening its applicability.

[0087] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0088] Furthermore, unless otherwise stated, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. All references to this specification are incorporated by way of citation to disclose and describe methods relating to those references. In the event of any conflict with any incorporated reference, the content of this specification shall prevail.

Claims

1. A device for verifying the synergistic migration of heavy metal ions and water vapor from a gangue filling material, characterized by, It comprises a constant-temperature sealed box (1) and a data calculation control terminal (3): The bottom of the constant-temperature sealed box (1) is provided with an electric heating device (9) for simulating the temperature of the working face underground, and the upper side of the electric heating device (9) is a gangue storage area (10) for placing gangue filling materials and aqueous solutions; the inner side of the gangue storage area (10) is provided with a temperature sensor (14), a humidity sensor (15) and a liquid level sensor (16) for measuring the temperature, relative humidity and liquid position in the constant-temperature sealed box (1) in real time; the upper side of the gangue storage area (10) is a fractured rock mass area (11) for placing fractured rock mass test pieces; and the top of the constant-temperature sealed box (1) is provided with an electronic sling scale (12) for measuring the real-time weight of the fractured rock mass test pieces; The gangue storage area (10) is connected with a water tank (2) for delivering deionized aqueous solution to the gangue storage area (10); the water tank (2) is connected with the gangue storage area (10) through a connecting pipe (6), and a water pump (7) and a flow meter (8) are installed in the connecting pipe (6); the flow meter (8) is used for controlling the delivery flow of the deionized aqueous solution; The constant-temperature sealed box (1) is provided with a plurality of collection parts, including a first collection part located at the junction of the gangue storage area (10) and the fractured rock mass area (11) for collecting water vapor samples in the gangue storage area; a second collection part located at the top of the fractured rock mass area (11) for collecting water vapor samples at the top of the fractured rock mass test pieces; and a plurality of third collection parts vertically distributed in the fractured rock mass area (11) for collecting water vapor samples in the internal fractures of the fractured rock mass test pieces; The data calculation control terminal (3) is connected with the temperature sensor (14), the humidity sensor (15), the liquid level sensor (16), the electric heating device (9), the electronic sling scale (12), the water pump (7) and the flow meter (8) respectively for controlling and adjusting the temperature in the constant-temperature sealed box (1) and the flow of the deionized aqueous solution delivered by the water tank (2), and for monitoring the temperature, humidity, liquid position in the box and the real-time weight of the fractured rock mass test pieces in real time; The real-time weight of the fractured rock mass test pieces and the plurality of water vapor samples are used for detecting the heavy metal ion concentration of the fractured rock mass test pieces at different positions along with the migration of water vapor, so as to verify the reliability of the numerical simulation model; and the numerical simulation model is used for simulating the migration process of the fractured rock mass test pieces along with the water vapor, so as to obtain the heavy metal ion concentration of the plurality of water vapor samples at different positions and the weight of the fractured rock mass test pieces.

2. The device according to claim 1, wherein the constant-temperature sealed box (1) is provided with a first box door (4), a second box door (5) and a plurality of collection holes (13); The first box door (4) is located at the top of the constant-temperature sealed box (1) and serves as a placing entrance for the fractured rock mass; The second box door (5) is located at the gangue storage area (10) and serves as a placing entrance for the gangue filling materials and aqueous solutions; The first box door (4) is provided with an electronic sling scale (12) for measuring the real-time weight of the fractured rock mass, and the hook of the electronic sling scale (12) is connected to the constant-temperature sealed box (1) for lifting the fractured rock mass; The first collecting member passes through the collecting hole (13) for collecting the water vapor sample in the gangue storage area; The second collection part passes through the collection hole (13) for collecting the water vapor sample on the top of the fractured rock mass; A plurality of third collection parts pass through a plurality of collection holes (13) except the first collection part and the second collection part, and the collection holes (13) are vertically and equidistantly distributed in the fractured rock mass area (11) for respectively collecting water vapor samples in the internal fractures of the fractured rock mass.

3. A method for verifying the synergistic migration of heavy metal ions with water vapor from a gangue filling material, characterized by, The gangue filling material heavy metal ion and water vapor migration verification device of any one of claims 1-2, the method comprises the following steps: Collecting the solid filling mining working face roof rock mass sample and the gangue filling material, obtaining the solid filling mining working face temperature, and determining the parameters related to the experimental and numerical simulation model, including the size of the fractured rock mass test piece consistent with the size of the fractured rock mass area (11), the fracture morphology of the fractured rock mass test piece, and the experimental time t; According to the size of the fractured rock mass test piece and the fracture morphology of the fractured rock mass test piece, the size of the collected solid filling mining working face roof rock mass sample is processed and the fracture is prefabricated to obtain the fractured rock mass test piece; According to the solid filling mining working face temperature, the electric heating device (9) is started to simulate the underground working face temperature; when the underground working face temperature reaches the solid filling mining working face temperature, the fractured rock mass test piece is placed in the fractured rock mass area (11), and the hook rope is connected to the hook of the electronic sling scale (12) to measure the real-time weight of the fractured rock mass test piece; When the temperature in the constant-temperature sealed box (1) is constant at the solid filling mining working face temperature, the collected gangue filling material is placed in the gangue storage area (10), and the deionized water solution is delivered into the gangue storage area (10) through the water tank (2), the water pump (7) and the flowmeter (8) to perform the gangue filling material heavy metal ion and water vapor migration experiment; When the experiment reaches the experimental time t, a plurality of water vapor samples at different positions of the gangue containing area, the top of the fractured rock mass test piece and the internal fracture of the fractured rock mass test piece corresponding to the experimental time t are collected through the first collection part, the second collection part and a plurality of third collection parts, and the corresponding relative humidity, the real-time weight of the fractured rock mass test piece and the environment volume of the plurality of water vapor at different positions are measured through the humidity sensor (15) t The environment volume of the plurality of water vapor at different positions is determined as the volume in the gangue containing area except the gangue filling material and deionized water, which is calculated through the volume of the gangue containing area (10) and the liquid level measured by the liquid level sensor (16). The heavy metal ion concentration after the water vapor samples are condensed into water is detected, and the heavy metal ion concentration of the water vapor samples at different positions obtained by the experiment is determined as the heavy metal ion concentration of the samples in the water vapor state according to the heavy metal ion concentration and volume after condensation, the corresponding relative humidity obtained by the experiment, and the volume of the water vapor samples. A numerical simulation model of the gangue filling material heavy metal ion and water vapor migration is established, the initial conditions and parameters of the numerical simulation model are set to be consistent with the parameters set in the experiment, and numerical simulation is performed to obtain the heavy metal ion concentration of the water vapor samples at different positions and the weight of the fractured rock mass test piece. When the average error between the multiple water vapor samples obtained by the experiment at different positions of the gangue storage area, the top of the fractured rock mass test piece and the internal fracture of the fractured rock mass test piece, the real-time weight of the fractured rock mass test piece and the heavy metal ion concentration of the multiple water vapor samples at different positions simulated by the numerical simulation model is less than the error threshold, the heavy metal ion migration process of the gangue filling material of the solid backfill mining working face in the mining area is numerically simulated by the established numerical simulation model of the heavy metal ion migration of the gangue filling material cooperated with water vapor.

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