Gangue filling material heavy metal ion synergistic water vapor migration verification device

Abstract

The invention discloses a heavy metal ion synergistic water vapor migration verification device for a gangue filling material, which belongs to the technical field of coal mining and is provided with a constant-temperature closed box, an electric heating device, a gangue containing area, a fractured rock mass area, an electronic crane scale, a water tank and a plurality of collecting pieces. According to the real-time weight of the fractured rock mass test piece and the multiple water vapor samples, the heavy metal ion concentration of the fractured rock mass test piece at different positions along with water vapor migration is detected, and the reliability of the numerical simulation model is verified; the numerical simulation model is used for simulating the migration process of the fractured rock mass test piece along with water vapor to obtain the heavy metal ion concentration of various water vapor samples at different positions and the weight of the fractured rock mass test piece; the numerical simulation model is used for simulating the heavy metal ion synergistic water vapor migration behavior of the gangue filling material. The method can verify the reliability of the numerical simulation model.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mining, and more particularly to a device for verifying the coordinated migration of heavy metal ions in gangue filling materials with water vapor. Background Art

[0002] With the rapid development of my country's economy, the demand for coal resources, as my country's basic energy and important industrial raw materials, has gradually increased. The intensity of coal resource mining has been increasing, and the gangue has been piled up on the surface, wasting land resources and causing pollution to the surrounding soil and water bodies. The SO2, CO2 and other gases produced by the spontaneous combustion of gangue will also pollute the atmospheric environment. In addition, the cost of gangue processing will also seriously affect the economic benefits of the enterprise.

[0003] Solid backfill coal mining technology, as an environmentally friendly mining method, can not only effectively solve the many problems caused by surface gangue accumulation, but also improve coal resource recovery, ensure mining safety, and extend the service life of mines. However, as gangue is filled into goafs on a large scale, the heavy metal ions inside it are in a state of secondary enrichment. At the same time, the gangue backfill is in a closed, dark and humid environment with a temperature higher than normal for a long time. After being soaked in mine water for a long time, the heavy metal ions inside are precipitated and released in large quantities. As the mine water evaporates, they migrate upward along the water-conducting fractures in the roof, causing a certain degree of pollution to the overlying aquifer.

[0004] At present, the issues concerning the migration of heavy metal ions in gangue filling are mostly focused on the migration of heavy metal ions inside the surface gangue to the underlying soil and groundwater under rainfall conditions. There is little research on the upward migration of heavy metal ions in gangue filling in conjunction with water vapor.

[0005] In addition, due to the limitations of the complex on-site environment and the influence of time, relevant research is carried out using numerical simulation methods, but it is difficult to determine whether the numerical simulation model is reliable and whether the numerical simulation results are correct. Summary of the Invention

[0006] In response to the problems existing in the above-mentioned fields, the present invention proposes a device for verifying the coordinated migration of heavy metal ions in gangue filling materials with water vapor. The designed device for verifying the coordinated migration of heavy metal ions in gangue filling materials with water vapor can study the migration behavior of fractured rock specimens at different positions as water vapor migrates, and can clarify the upward migration ability and rules of heavy metal ions at different positions. The reliability of the established numerical simulation model of the coordinated migration of heavy metal ions in gangue filling materials with water vapor is verified by the device. By verifying the accuracy of the numerical simulation model, the accuracy of the numerical simulation results is ensured.

[0007] To solve the above technical problems, the present invention discloses a verification device for the coordinated migration of heavy metal ions in gangue filling materials with water vapor, comprising a constant temperature closed box and a data calculation and control terminal: An electric heating device for simulating the temperature of the underground working surface is provided at the bottom of the constant temperature closed box. Above the electric heating device is a waste rock storage area for storing waste rock filling materials and aqueous solutions. A temperature sensor, a humidity sensor, and a liquid level sensor are provided inside the waste rock storage area for real-time measurement of the temperature, relative humidity, and liquid position inside the constant temperature closed box. Above the waste rock storage area is a fractured rock area for storing fractured rock specimens. An electronic hanging scale is provided on the top of the constant temperature closed box for measuring the real-time weight of the fractured rock specimens. The gangue storage area is connected to a water tank for delivering deionized water solution to the gangue storage area; the water tank is connected to the gangue storage area via a connecting pipe, a water pump and a flow meter are installed in the connecting pipe, and the flow meter is used to control the delivery flow of the deionized water solution; The constant temperature closed box is provided with a plurality of collecting pieces, including: a first collecting piece located at the junction of the gangue holding area and the fractured rock area, for collecting water vapor samples from the gangue holding area; a second collecting piece located at the top of the fractured rock area, for collecting water vapor samples from the top of the fractured rock specimen; and a plurality of third collecting pieces vertically distributed in the fractured rock area, for collecting water vapor samples from the internal cracks of the fractured rock specimen. The data calculation and control terminal is respectively connected to the temperature sensor, humidity sensor, liquid level sensor, electric heating device, electronic crane scale, water pump and flow meter, and is used to control and adjust the temperature inside the constant temperature closed box 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 specimen in the box in real time; Among them, the real-time weight of the fractured rock specimen and multiple water vapor samples are used to detect the heavy metal ion concentration of the fractured rock specimen at different positions as the water vapor migrates, 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 specimen with water vapor, and obtain the heavy metal ion concentration of multiple water vapor samples at different positions and the weight of the fractured rock specimen.

[0008] Preferably, the constant temperature closed box is provided with a first box door, a second box door and a plurality of collection holes: The first box door is located at the top of the constant temperature closed box and serves as the entrance for placing the fractured rock mass; The second box door is located in the gangue storage area and serves as the entrance for the gangue filling material and the aqueous solution; The first box door is provided with an electronic crane scale for measuring the real-time weight of the fractured rock mass, and the hook of the electronic crane scale is passed into the constant temperature closed box for lifting the fractured rock mass; The first collecting piece passes through the collecting hole to collect water vapor samples from the gangue holding area; the second collecting piece passes through the collecting hole to collect water vapor samples from the top of the fractured rock specimen; multiple third collecting pieces pass through multiple collecting holes except the first collecting piece and the second collecting piece, and the collecting holes are equidistantly and vertically distributed in the fractured rock area to collect water vapor samples from the internal fractures of the fractured rock specimen respectively.

[0009] Preferably, a verification method for the coordinated migration of heavy metal ions in gangue filling materials with water vapor is also included, comprising the following steps: Collect rock samples and waste rock filling materials from the top of the solid filling mining face in the mining area, obtain the temperature of the solid filling mining face, and determine the parameters related to the experiment and numerical simulation model, including the size of the fractured rock mass specimen consistent with the size of the fractured rock mass area, the fracture morphology of the fractured rock mass specimen, and the experimental time t ; According to the size and fracture morphology of the fractured rock mass specimens, the rock samples collected from the roof of the solid filling mining working face in the mining area are processed in size and fracture prefabricated to obtain fractured rock mass specimens; According to the temperature of the solid filling mining working 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 filling mining working 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; When the temperature in the constant temperature sealed box is constant at the solid filling mining working face temperature as measured by the temperature sensor, the collected gangue filling material is placed in the gangue holding area, and the deionized water solution is transported to the gangue holding area through the water tank, water pump and flow meter to conduct a heavy metal ion cooperative water vapor migration experiment of the gangue filling material; When the experiment reaches the experimental time t Afterwards, the experimental time is collected through the first collection piece, the second collection piece and multiple third collection pieces t The corresponding gangue holding area, the top of the fractured rock specimen and the various water vapor samples at different locations of the fractured rock specimen are collected, and the experimental time is measured by the humidity sensor. t Corresponding relative humidity, real-time weight of the fractured rock specimen, and the volume of the environment in which the various water vapors are located at different positions, the volume of the environment in which the various water vapors are located at different positions is determined to be the volume of the gangue holding area excluding the gangue filling material and deionized water, and is calculated based on the volume of the gangue holding area and the liquid level measured by the liquid level sensor; Detecting the heavy metal ion concentrations of various water vapor samples after condensation into water, and determining the heavy metal ion concentrations of the various water vapor samples at different positions obtained in the experiment as the heavy metal ion concentrations of the samples in the water vapor state based on the heavy metal ion concentrations and volume of the water vapor samples after condensation, the corresponding relative humidity obtained in the experiment, and the volume of the various water vapor samples; A numerical simulation model for the coordinated migration of heavy metal ions in gangue filling materials and water vapor was established. The initial conditions and parameters of the numerical simulation model were set to be consistent with the parameters of the experimental setting. Numerical simulations were then performed to obtain the heavy metal ion concentrations of various water vapor samples at different locations and the weight of fractured rock specimens. When the average error between the experimentally obtained multiple water vapor samples at different positions of the gangue holding area, the top of the fractured rock specimen and the internal fractures of the fractured rock specimen, and the real-time weight of the fractured rock specimen and the heavy metal ion concentration of the multiple water vapor samples at different positions simulated by the numerical simulation model, and the weight of the fractured rock specimen is less than the error threshold, the established numerical simulation model for the coordinated migration of heavy metal ions of gangue filling materials with water vapor is used to numerically simulate the collected process of the coordinated migration of heavy metal ions of gangue filling materials with water vapor in the solid filling mining working face of the mining area.

[0010] Compared with the prior art, the present invention has the following beneficial effects: The device for verifying the coordinated migration of heavy metal ions in gangue filling materials with water vapor proposed in the present invention is equipped with a constant temperature sealed box, an electric heating device, a gangue holding area, a fractured rock area, an electronic hanging scale, a water tank and multiple collecting parts. The electric heating device is used to simulate the temperature of the underground working surface, and the electronic hanging scale is used to measure the real-time weight of the fractured rock specimen. Water vapor samples are collected from different positions in the gangue holding area, the top of the fractured rock specimen and the fractures inside the fractured rock specimen through the multiple collecting parts. The migration behavior of the fractured rock specimen at different positions as the water vapor migrates is studied. According to the multiple water vapor samples collected at different positions and the real-time weight of the fractured rock specimen, the heavy metal ion concentration at different positions of the fractured rock specimen as the water vapor migrates and the real-time weight of the fractured rock specimen are determined. Through this experimental device, the upward migration ability of heavy metal ions at different positions and the experimental laws can be clarified. A numerical simulation model for the migration of heavy metal ions in waste rock filling materials in concert with water vapor was established. The initial conditions and parameters of the numerical simulation model were set to be consistent with those of the experimental setup. The migration of fractured rock specimens along with water vapor was simulated, and the heavy metal ion concentrations and fractured rock specimen weights of various water vapor samples at different locations were obtained. The experimental results were compared with those obtained from the numerical simulation model to verify the model's accuracy and ensure the accuracy of the simulation results. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the overall structure of the gangue filling material heavy metal ion cooperative water vapor migration device proposed in the present invention; Figure 2 This is a schematic diagram of the internal structure of the constant temperature closed box proposed by the present invention; In the figure: 1 is a constant temperature closed box; 2 is a water tank; 3 is a data calculation and control terminal; 4 is box door No. 1; 5 is box door No. 2; 6 is a connecting pipe; 7 is a water pump; 8 is a flow meter; 9 is an electric heating device; 10 is a waste rock storage area; 11 is a fractured rock area; 12 is a high-precision electronic crane scale; 13 is a collection hole; 14 is a temperature sensor; 15 is a humidity sensor; and 16 is a liquid level sensor. DETAILED DESCRIPTION

[0012] The following is a combination of the embodiments of the present invention Figure 1-Figure 2 , the technical solutions in the embodiments of the present invention are clearly and completely described. It should be understood that the terms used in the present invention are only used to describe specific implementation methods and are not intended to limit the present invention.

[0013] Example like Figure 1 As shown, the present invention proposes a verification device for the coordinated migration of heavy metal ions in gangue filling materials with water vapor, comprising a constant temperature closed box 1; An electric heater 9 is installed at the bottom of the constant-temperature sealed chamber 1 to control the chamber's temperature. Above the heater 9 is a waste rock storage area 10 for storing waste rock filling materials and aqueous solutions. Inside this area 10 are temperature sensors 14, humidity sensors 15, and liquid level sensors 16 for real-time measurement of the chamber's temperature, relative humidity, and liquid level. Above this area 10 is a fractured rock mass area 11 for storing fractured rock specimens.

[0014] The constant temperature closed box is provided with a No. 1 box door 4 and a No. 2 box door 5. The No. 1 box door 4 is located at the top of the constant temperature closed box 1 and serves as the entrance for placing the fractured rock mass; the No. 2 box door 5 is located at the gangue holding area 10 and serves as the entrance for placing the gangue filling material and the aqueous solution.

[0015] like Figure 2 As shown, a high-precision electronic crane scale 12 is provided on the first door 4 of the constant temperature closed box 1 for measuring the real-time weight of the fractured rock specimen; a hook of the high-precision electronic crane scale 12 is passed into the constant temperature closed box 1 for lifting the fractured rock.

[0016] The constant temperature closed box 1 is provided with a plurality of collecting pieces and six collecting holes 13, including: a first collecting piece located at the junction of the gangue holding area 10 and the fractured rock area 11, for collecting water vapor samples from the gangue holding area; a second collecting piece located at the top of the fractured rock area 11, for collecting water vapor samples from the top of the fractured rock; and a plurality of third collecting pieces vertically and equidistantly distributed in the fractured rock area 11, for collecting water vapor samples from the cracks inside the fractured rock.

[0017] All six collection holes 13 lead into the constant-temperature sealed chamber 1. The first collection component passes through one of the six collection holes 13 to collect water vapor samples from the waste rock storage area. The second collection component passes through another of the six collection holes 13 to collect water vapor samples from the top of the fractured rock specimen. Multiple third collection components pass through the remaining collection holes, which are equidistantly distributed vertically throughout the fractured rock area 11, to collect water vapor samples from the internal fractures of the fractured rock specimen.

[0018] The gangue storage area 10 of the constant temperature sealed box 1 is connected to the water tank 2 via a connecting pipe 6, which is used to deliver deionized water solution to the gangue storage area 10. A water pump 7 is installed in the connecting pipe 6. The water pump 7 is a high-pressure diaphragm water pump; the flow meter 8 is installed in the connecting pipe 6 to control the delivery flow of the deionized water solution.

[0019] It also includes a data calculation control terminal 3, which is respectively 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, and is used to control and adjust the temperature inside the constant temperature closed box 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 specimen inside the constant temperature closed box 1 in real time.

[0020] Working principle of the device: The real-time weight of the fractured rock specimen and multiple water vapor samples are used to detect the heavy metal ion concentrations at different positions of the fractured rock specimen as the water vapor migrates, 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 specimen with water vapor, and obtain the heavy metal ion concentrations of multiple water vapor samples at different positions and the weight of the fractured rock specimen.

[0021] In this embodiment, the constant temperature sealed box 1 in the above-mentioned gangue filling material heavy metal ion coordinated water vapor migration verification device has an overall height of 100 cm and a diameter of 20 cm. The internal electric heating device 9 of the constant temperature sealed box 1 is 10 cm high, the gangue holding area 10 is 30 cm high, and the fractured rock area 11 is 50 cm high.

[0022] The distance between the fractured rock mass area 11 and the No. 1 box door 4 is 10 cm, and the temperature sensor 14, the humidity sensor 15, and the liquid level sensor 16 are respectively located at the 28 cm position from the bottom to the top of the gangue holding area 10.

[0023] The collecting hole corresponding to the first collecting part among the six collecting holes 13 is located at 0 cm from the bottom to the top of the gangue holding area 10, the collecting hole of the second collecting part is located at 6 cm from the bottom to the top of the gangue holding area 10, and the four collecting holes of the third collecting part are respectively located at 12 cm, 18 cm, 24 cm and 30 cm from the bottom to the top of the gangue holding area 10.

[0024] The height of the water tank 2 is 50 cm and the diameter is 15 cm. The water tank 2 is designed to be fully loaded with 3.52 L. One end of the connecting pipe 6 is connected to the 0 cm position from the bottom to the top of the water tank 2, and the other end is connected to the 5 cm position from the bottom to the top of the water tank 2.

[0025] This example uses the aforementioned verification device for the coordinated migration of heavy metal ions in gangue filling materials with water vapor, and also proposes a verification method for the coordinated migration of heavy metal ions in gangue filling materials with water vapor. By comparing the experimental data with the data obtained from the numerical simulation model, when the error between the two is less than the error threshold, it indicates that the established numerical simulation model is sufficiently reliable. Therefore, the established numerical simulation model can be used to numerically simulate the migration process of fractured rock specimens with water vapor. The specific operation steps include:

[0026] Step 1: Obtain experimental materials and parameters On-site collection of rock samples and waste rock filling materials from the top of the solid filling mining face in the mining area to obtain the temperature of the solid filling mining face k =25℃; Determine the experimental parameters, among which the experimental and numerical simulation parameters include the size of the fractured rock specimen, the fracture morphology of the fractured rock specimen, the experimental time, t ; The size of the fractured rock specimen is consistent with that of the fractured rock area 11 of the device; the height of the fractured rock specimen is 50 cm and the diameter is 20 cm. The fracture in the fractured rock specimen is vertical to the center of the fractured rock specimen. The entire specimen is cut open. The experimental time t =60 days; Step 2: Prepare fractured rock specimens According to the size of the fractured rock mass specimen and the fracture morphology of the fractured rock mass specimen obtained in step 1, the rock mass sample of the roof of the solid filling mining working face collected on-site in step 1 is processed in size and fracture prefabricated; According to the location of the collection hole 13, the processed rock sample is further processed to reserve the location of the collection hole 13. Among them, three collection pieces will pass through the collection hole directly into the fracture, and two hook ropes will be fixed above the rock sample to obtain a fractured rock mass specimen; Step 3: Experimental process Step 301: Based on the working surface temperature measured in step 1k =25℃, start the electric heating device 9 through the data calculation control terminal 3 to simulate the underground working surface temperature; Step 302: Wait until the temperature in the constant temperature sealed box 1 reaches k =25℃, place the fractured rock mass specimen prepared in step 2 into the fractured rock mass area 11 from the entrance of the No. 1 box door 4, and connect the two hook ropes to the hooks of the high-precision electronic crane scale 12; Step 303: Measure the temperature inside the constant temperature sealed box 1 through the temperature sensor, and wait until the temperature inside the constant temperature sealed box 1 is constant. k =25°C, the gangue filling material collected in step 1 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, and the heavy metal ion cooperative water vapor migration experiment of the gangue filling material is started; Step 4: Sample and data collection The experiment reaches step 1 time t After that, the time is collected through six collection holes 13 t Six kinds of water vapor samples at 3700 sq. ft and measured by humidity sensor t Relative humidity at ρ =94%, real-time weight of fractured rock specimen m 1=32.9943 kg, and the volume of the six types of water vapor at different locations. The volume of the various types of water vapor at different locations is determined to be the volume of the gangue holding area excluding the gangue filling material and deionized water, which is calculated based on the volume of the gangue holding area 10 and the liquid level measured by the liquid level sensor 16; Step 5: Sample testing The six water vapor samples collected at different positions in step 4 were tested using an inductively coupled plasma diffractometer. The results showed that the concentrations of heavy metal ions in the six water vapor samples at different positions were: c 1=0.672mg / L, c 2=0.513mg / L, c 3=0.397mg / L, c 4=0.319mg / L, c 5=0.225mg / L, c 6=0.166mg / L, among which the heavy metal ion concentrations in the six water vapor samples are the heavy metal ion concentrations after the water vapor is condensed into water. The measured heavy metal ions are Mn 2+ ; Step 6: Data conversion Calculating saturated vapor pressure e : Where,k is the Celsius temperature inside the constant temperature sealed box 1 measured by the temperature sensor 14, k =25℃; Calculating actual vapor pressure E : Where, ρ is the experimental time measured by the humidity sensor 15 t The corresponding relative humidity, ρ =94%; Calculate the absolute humidity as ρ w : Where, T is the thermodynamic temperature, T =273.15+ k ; Calculate the mass of water vapor m 蒸 : Calculating the volume of water vapor v 蒸 : Where, ρ 水 is the density of water; Calculate the concentration of heavy metal ions in water vapor state c 蒸 : In the above formula, c The heavy metal ion concentrations in the six water vapor samples at different locations obtained through testing in step 5 include c 1. c 2. c 3. c 4. c 5 and c 6; Thus, the internal heavy metal ion concentrations under six water vapor states at different locations are calculated. c 蒸1 =0.01453mg / L, c 蒸2 =0.01110mg / L, c 蒸3 =0.00859mg / L, c 蒸4 =0.00690mg / L, c 蒸5=0.00487mg / L, c 蒸6 =0.00359mg / L; Step 7. Simulation verification: COMSOL Multiphysics numerical simulation software was used to establish a numerical simulation model of the migration of heavy metal ions in gangue filling materials in coordination with water vapor. The initial conditions and parameters of the numerical simulation model were set to be consistent with the experiment, and then the simulation was carried out. The heavy metal ion concentrations of the six water vapor samples at different positions obtained by numerical simulation were as follows: 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; The heavy metal ion concentrations of six water vapor samples at different positions obtained by 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 and the real-time weight of the fractured rock specimen obtained from the experiment m 1. c 1=0.672mg / L, c 2=0.513mg / L, c 3=0.397mg / L, c 4=0.319mg / L, c 5=0.225mg / L, c 6=0.166mg / L for comparison, and calculate the average error of the data σ=7.01%; at this time, σ ≤10% (preset error threshold), indicating that the established numerical simulation model of the coordinated migration of heavy metal ions in gangue filling materials with water vapor has sufficient reliability, and the numerical simulation model can be used to conduct numerical simulation research on the coordinated migration behavior of heavy metal ions in gangue filling materials in solid filling mining working faces.

[0027] When σ>10%, it indicates that the established numerical simulation model is inaccurate. It is necessary to modify and reconstruct the parameters of the numerical simulation model, re-run the numerical simulation and compare the data to determine the average error until the average error meets the error threshold requirement.

[0028] The device and method for verifying the migration of heavy metal ions in gangue filling materials in cooperation with water vapor proposed in the present invention can clarify the upward migration ability and rules of heavy metal ions at different positions by experimentally studying the migration behavior of heavy metal ions in gangue filling materials in cooperation with water vapor in cracks. The established numerical simulation model numerically simulates the migration process of fractured rock specimens along with water vapor to obtain the heavy metal ion concentrations and fractured rock specimen weights of various water vapor samples at different positions. The average error between the numerical simulation data and the experimental data is obtained, and the results of the numerical simulation are verified by comparing the average error with the 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. In addition, the fracture morphology in the fractured rock mass used in the present invention can be processed by itself as needed, and the scope of application is wider.

[0029] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

[0030] In addition, unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods related to the documents. In the event of any conflict with any incorporated document, the content of this specification shall prevail.

Claims

1. A verification device for the coordinated migration of heavy metal ions in gangue filling materials with water vapor, characterized in that: It includes a constant temperature sealed box (1) and a data calculation and 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 underground working surface; above the electric heating device (9) is a gangue holding area (10) for placing gangue filling materials and aqueous solution; the inside of the gangue holding area (10) is provided with a temperature sensor (14), a humidity sensor (15) and a liquid level sensor (16) for real-time measurement of the temperature, relative humidity and liquid position in the constant temperature sealed box (1); above the gangue holding area (10) is a fractured rock area (11) for placing fractured rock specimens; the top of the constant temperature sealed box (1) is provided with an electronic hanging scale (12) for measuring the real-time weight of the fractured rock specimens; The gangue storage area (10) is connected to a water tank (2) for conveying deionized water solution to the gangue storage area (10); the water tank (2) is connected to the gangue storage area (10) via a connecting pipe (6); a water pump (7) and a flow meter (8) are installed in the connecting pipe (6); the flow meter (8) is used to control the conveying flow rate of the deionized water solution; The constant temperature closed box (1) is provided with a plurality of collecting pieces, including: a first collecting piece located at the junction of the gangue holding area (10) and the fractured rock area (11), for collecting water vapor samples from the gangue holding area; a second collecting piece located at the top of the fractured rock area (11), for collecting water vapor samples from the top of the fractured rock specimen; and a plurality of third collecting pieces vertically distributed in the fractured rock area (11), for collecting water vapor samples from the internal fractures of the fractured rock specimen. The data calculation control terminal (3) is connected to the temperature sensor (14), humidity sensor (15), liquid level sensor (16), electric heating device (9), electronic hanging scale (12), water pump (7) and flow meter (8) respectively, and is used to control and adjust the temperature inside the constant temperature closed box (1) and the flow rate of the deionized water solution transported by the water tank (2), and to monitor the temperature, humidity, liquid position and real-time weight of the fractured rock specimen inside the box in real time; Among them, the real-time weight of the fractured rock specimen and multiple water vapor samples are used to detect the heavy metal ion concentration of the fractured rock specimen at different positions as the water vapor migrates, 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 specimen with water vapor, and obtain the heavy metal ion concentration of multiple water vapor samples at different positions and the weight of the fractured rock specimen.

2. The verification device for the coordinated migration of heavy metal ions in gangue filling materials with water vapor according to claim 1, wherein the constant temperature closed 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 closed box (1) and serves as an entrance for placing the fractured rock mass; The second box door (5) is located at the gangue storage area (10) and serves as an entrance for placing gangue filling materials and aqueous solution; The first box door (4) is provided with an electronic hanging scale (12) for measuring the real-time weight of the fractured rock mass, and a hook of the electronic hanging scale (12) is passed into the constant temperature closed box (1) for lifting the fractured rock mass; The first collecting member passes through the collecting hole (13) and is used to collect water vapor samples from the gangue storage area; The second collecting member passes through the collecting hole (13) and is used to collect water vapor samples at the top of the fractured rock mass; The plurality of third collection pieces pass through the plurality of collection holes (13) excluding the first collection piece and the second collection piece. The collection holes (13) are equidistantly and vertically distributed in the fractured rock mass area (11) and are used to respectively collect water vapor samples from the fractures inside the fractured rock mass.

3. A verification method for the coordinated migration of heavy metal ions in gangue filling materials with water vapor, characterized in that: The device for verifying the coordinated migration of heavy metal ions in gangue filling materials with water vapor as described in claims 1-2 comprises the following steps: Collect rock samples and waste rock filling materials from the top plate of the solid filling mining working face in the mining area, obtain the temperature of the solid filling mining working face, and determine parameters related to the experiment and the numerical simulation model, including the size of the fractured rock mass specimen consistent with the size of the fractured rock mass area (11), the fracture morphology of the fractured rock mass specimen, and the experimental time t; According to the size and fracture morphology of the fractured rock mass specimens, the rock samples collected from the roof of the solid filling mining working face in the mining area are processed in size and fracture prefabricated to obtain fractured rock mass specimens; According to the temperature of the solid filling mining working surface, the electric heating device (9) is started to simulate the temperature of the underground working surface; when the temperature of the underground working surface reaches the temperature of the solid filling mining working surface, the fractured rock mass specimen is placed in the fractured rock mass area (11), and the hook rope is connected to the hook of the electronic crane scale (12) to measure the real-time weight of the fractured rock mass specimen; When the temperature in the constant temperature sealed box (1) is measured by the temperature sensor (14) to be constant at the solid filling mining working face temperature, the collected gangue filling material is placed in the gangue holding area (10), and the deionized water solution is transported to the gangue holding area (10) through the water tank (2), water pump (7) and flow meter (8), and a heavy metal ion synergistic water vapor migration experiment of the gangue filling material is carried out; When the experiment reaches the experimental time t, the first collecting piece, the second collecting piece and the plurality of third collecting pieces collect a plurality of water vapor samples at different positions of the gangue holding area, the top of the fractured rock specimen and the internal fractures of the fractured rock specimen corresponding to the experimental time t, and the experimental time is measured by the humidity sensor (15). t The corresponding relative humidity, the real-time weight of the fractured rock specimen, and the volume of the environment in which the various water vapors are located at different positions are determined to be the volume of the waste rock storage area excluding the waste rock filling material and deionized water, which is calculated by the volume of the waste rock storage area (10) and the liquid level measured by the liquid level sensor (16); Detecting the heavy metal ion concentrations of the various water vapor samples after condensation into water, and determining the heavy metal ion concentrations of the various water vapor samples at different positions obtained in the experiment as the heavy metal ion concentrations of the samples in the water vapor state of the various water vapor samples based on the heavy metal ion concentrations and volume of the water vapor samples after condensation, the corresponding relative humidity obtained in the experiment, and the volume of the various water vapor samples; A numerical simulation model for the coordinated migration of heavy metal ions in gangue filling materials and water vapor was established. The initial conditions and parameters of the numerical simulation model were set to be consistent with the parameters of the experimental setting. Numerical simulations were then performed to obtain the heavy metal ion concentrations of various water vapor samples at different locations and the weight of fractured rock specimens. When the average error between the experimentally obtained multiple water vapor samples at different positions of the gangue holding area, the top of the fractured rock specimen and the internal fractures of the fractured rock specimen, and the real-time weight of the fractured rock specimen and the heavy metal ion concentration of the multiple water vapor samples at different positions simulated by the numerical simulation model, and the weight of the fractured rock specimen is less than the error threshold, the established numerical simulation model for the coordinated migration of heavy metal ions of gangue filling materials with water vapor is used to numerically simulate the collected process of the coordinated migration of heavy metal ions of gangue filling materials with water vapor in the solid filling mining working face of the mining area.

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