A device and method for simulating the similarity of filling body shape in high-position grouting goaf

Abstract

The present invention discloses a device and method for simulating the similarity of the filling body morphology in a goaf area during high-position grouting filling. The device includes an industrial CT scanner, a high-position grouting filling simulation box for the collapse zone of the goaf area, a grouting system, and a data acquisition and processing system. The simulation method of the present invention simulates the high-position grouting filling process after mining by grouting into a high-position grouting filling simulation box filled with gravel of a certain particle size by predetermining the similarity ratio. At the same time, during the grouting filling process, the inside of the filling simulation box is scanned in real time using an industrial CT scanner to obtain the accumulation form and flow state of the filling slurry in the goaf, and the data acquisition and processing system is used for three-dimensional reconstruction, and the accumulation curve of the filling slurry on different cross sections can be output in real time, which truly and intuitively reflects the state of the filling slurry in the goaf during the high-position grouting filling process. The present invention is simple to operate, and the industrial CT scanner is used to replace manual measurement, and the obtained test data is more accurate and detailed.

Description

Technical Field

[0001] The invention relates to a filling body morphology similarity simulation device and method in a high-position grouting filling goaf area, which is suitable for studying the accumulation morphology and flow law of filling slurry in the goaf area during high-position grouting filling mining. Background Art

[0002] In the production process of energy enterprises such as coal mines and power plants, various solid wastes such as gangue, fly ash, slag, etc. are generated. The traditional surface accumulation or landfill treatment method poses a great threat and damage to the ecological environment of the plant area, including encroachment on land, pollution of air, water quality and soil. With the increase of social environmental awareness, the environmental standards and related requirements of the coal and power generation industries are becoming increasingly stringent, and the discharge of gangue and power plant solid waste is becoming increasingly unacceptable. Therefore, a new green and environmentally friendly treatment method was born, which uses underground filling in coal mine goafs to treat gangue and power plant solid waste.

[0003] At present, my country can realize the function of backfilling solid waste in coal mines, and the large-scale filling methods include lane filling, comprehensive mechanized filling of working faces, etc. However, it was found in the implementation process that the initial investment is huge when using lane filling and comprehensive mechanized filling, and it affects the production efficiency to a certain extent. Therefore, the method of high-position grouting filling in the goaf area by recycling adjacent tunnels independently of the original coal mining operation has been further promoted. However, in the process of high-position grouting filling, the shape of the filling body in the goaf is particularly important for the determination of the filling step and process flow. Therefore, it has become an urgent problem to determine the accumulation shape and flow law of the filling slurry in the goaf efficiently, quickly and accurately. Summary of the invention

[0004] The purpose of the present invention is to provide a device and method for simulating the morphology of a filling body in a high-position grouting goaf area, so as to efficiently, quickly and accurately determine the accumulation morphology and flow law of the filling slurry in the goaf area.

[0005] The present invention is achieved by adopting the following technical solutions:

[0006] A high-position grouting filling goaf filling body morphology similarity simulation device, comprising an industrial CT scanner, a high-position grouting filling simulation box for the goaf collapse zone, a grouting system and a data acquisition and processing system; wherein,

[0007] A closable filling port is provided on the top of the high-position grouting filling simulation box in the goaf collapse zone. The grouting system is used to inject slurry into the high-position grouting filling simulation box in the goaf collapse zone. The data acquisition and processing system is used to control the industrial CT scanner to scan each section of the high-position grouting filling simulation box in the goaf collapse zone at different time periods, and use three-dimensional reconstruction technology to display the shape of the filling slurry in the high-position grouting filling simulation box in the goaf collapse zone, and output the accumulation curve of the filling slurry on different horizontal and vertical sections in real time.

[0008] A further improvement of the present invention is that the industrial CT scanner is arranged on a CT scanner column.

[0009] A further improvement of the present invention is that the high-position grouting filling simulation box in the goaf collapse zone is made of acrylic material, the bottom of which is arranged on the base of the experimental device, and one end is movably connected to the base of the experimental device through a rotatable hinge structure; the base of the experimental device is arranged on a slide and can reciprocate in a straight line along the slide.

[0010] A further improvement of the present invention is that the high-position grouting filling simulation box of the goaf collapse zone and the base of the experimental device are supported by a plurality of retractable hydraulic cylinders.

[0011] A further improvement of the present invention is that a retractable movable top plate is arranged on the top of the high-position grouting filling simulation box of the goaf collapse zone, and a plurality of slots are provided on the front and rear inner walls of the high-position grouting filling simulation box of the goaf collapse zone. Baffles are added in the high-position grouting filling simulation box of the goaf collapse zone through the slots to adjust the effective length of the high-position grouting filling simulation box of the goaf collapse zone.

[0012] A further improvement of the present invention is that the base of the experimental device can adjust the angle of the high-position grouting filling simulation box in the collapse zone of the goaf according to experimental requirements.

[0013] A further improvement of the present invention is that the telescopic range of the telescopic movable top plate is 1000 mm to 2000 mm.

[0014] A further improvement of the present invention is that the grouting system includes a filling pump and a plurality of filling funnels arranged on the top of the high-position grouting filling simulation box in the goaf collapse zone, and the outlets of the filling pumps are connected to the corresponding filling funnel inlets through a filling pipe.

[0015] A further improvement of the present invention is that the lower structure of the filling funnel is hook-shaped and bent, and the outlet is arranged upward.

[0016] A method for simulating the morphology of a filling body in a goaf filled with high-position grouting, based on the above-mentioned device for simulating the morphology of a filling body in a goaf filled with high-position grouting, comprises the following steps:

[0017] 1) Determine the effective length of the high-position grouting filling simulation box in the goaf collapse zone, the height of adding gravel in the high-position grouting filling simulation box in the goaf collapse zone, and the lower structure of the specific filling funnel according to the model similarity ratio; determine the end flow of the filling pipeline according to the specific working conditions of the high-position grouting filling;

[0018] 2) Install the removable baffle on the right side of the high-position grouting simulation box at the designated location, adjust the length of the retractable movable top plate, and install the filling funnel on the retractable movable top plate; fill the gravel of corresponding height and particle size, and install the retractable movable top plate with a specific filling funnel above the gravel;

[0019] 3) Use the grouting system to perform grouting at the set flow rate, use the industrial CT scanner to scan the high-position grouting filling simulation box in the goaf collapse zone at certain intervals, and use the data acquisition and processing system to perform three-dimensional reconstruction and output the accumulation curve of the filling slurry on different sections in real time.

[0020] The present invention has at least the following beneficial technical effects:

[0021] The present invention provides a device for simulating the morphology of filling bodies in goafs by high-position grouting, which includes an industrial CT scanner, a high-position grouting simulation box for goaf collapse zones, a grouting system, and a data acquisition and processing system. The simulation device of the present invention simulates the post-mining high-position grouting filling process by grouting into a high-position grouting simulation box filled with gravel of a certain particle size by predetermining a similarity ratio. At the same time, during the grouting filling process, the industrial CT scanner is used to scan the interior of the high-position grouting simulation box for filling the goaf collapse zone in real time to obtain the accumulation form and flow state of the filling slurry in the goaf, and the data acquisition and processing system is used for three-dimensional reconstruction, which can output the accumulation curve of the filling slurry on different cross sections in real time, and truly and intuitively reflect the state of the filling slurry in the goaf during the high-position grouting filling process. The present invention is simple to operate, and CT scanning is used to replace manual measurement, so that the obtained test data is more accurate and detailed.

[0022] Furthermore, the simulation device can be adjusted through the base to simulate the influence of different coal seam inclinations on slurry flow; different working face lengths can be simulated by adjusting the baffle position and the retractable movable roof; different filling conditions can be simulated by adjusting the lower structure and pressure of the filling funnel.

[0023] The present invention provides a similar simulation method for the morphology of filling bodies in goafs during high-position grouting. Combined with industrial CT scanner technology, the stacking form and flow state of filling slurry in goafs under different grouting filling conditions can be obtained, which is convenient for studying the diffusion law of slurry in goafs. The data acquisition and processing system is used for three-dimensional reconstruction, and the stacking curves of filling slurry on different cross sections can be output in real time, which truly and intuitively reflects the state of filling slurry in goafs during high-position grouting filling. The method is simple to operate, and CT scanning is used to replace manual measurement, so the obtained test data is more accurate and detailed. The present invention has diverse functions and simple structure. It is a new experimental device for in-depth study of the stacking form and flow state of slurry in goafs during high-position grouting under different working conditions. The research results of the present invention are of great significance to the flow range of slurry in goafs, the determination of filling capacity, and the determination of filling step distance, and can be widely used in the field of high-position grouting filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of a high-position grouting filling device for simulating the similarity of the filling body shape in the goaf area of ​​the present invention;

[0025] Figure 2 This is a perspective view of the high-position grouting filling simulation box in the goaf collapse zone;

[0026] Figure 3 It is a perspective view of the filling funnel and the retractable movable top plate.

[0027] Description of reference numerals:

[0028] 1—CT scanner column, 2—industrial CT scanner, 3—high-position grouting filling simulation box for goaf collapse zone, 4—filling funnel, 5—filling funnel lower structure, 6—retractable hydraulic cylinder, 7—rotatable hinged structure, 8—retractable movable top plate, 9—card slot, 10—experimental device base, 11—slide, 12—filling pump, 13—filling pipeline, 14—filling port, 15—data acquisition and processing system. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0030] like Figures 1 to 3As shown, the present invention provides a device for simulating the morphology of a filling body in a goaf with high-position grouting, comprising an industrial CT scanner 2, a high-position grouting simulation box 3 for a goaf collapse zone, a grouting system, and a data acquisition and processing system 15. Among them, a closable filling port 14 is provided at the top of the high-position grouting simulation box 3 for a goaf collapse zone, the grouting system is used to inject slurry into the high-position grouting simulation box 3 for a goaf collapse zone, and the data acquisition and processing system 15 is used to control the industrial CT scanner 2 to scan each section of the high-position grouting simulation box 3 for a goaf collapse zone at different time periods, and use three-dimensional reconstruction technology to display the morphology of the filling slurry in the high-position grouting simulation box 3 for a goaf collapse zone, and output the accumulation curve of the filling slurry on different horizontal and vertical sections in real time.

[0031] The industrial CT scanner 2 is arranged on the CT scanner column 1 .

[0032] The high-position grouting filling simulation box 3 of the goaf collapse zone is a box with a base made of acrylic material. Four card slots 9 with a spacing of 200 mm are set on the front and rear sides of the box to add baffles to adjust the effective length of the filling simulation box. The upper side has a retractable movable top plate 8 for installing the filling funnel 4. The bottom of the high-position grouting filling simulation box 3 of the goaf collapse zone is set on the experimental device base 10, and one end is movably connected to the experimental device base 10 through a rotatable hinge structure; the experimental device base 10 is set on the slide 11 and can reciprocate linearly along the slide 11. The high-position grouting filling simulation box 3 of the goaf collapse zone and the experimental device base 10 are supported by a number of retractable hydraulic cylinders 6. A retractable movable top plate 8 is arranged on the top of the high-position grouting filling simulation box 3 of the goaf collapse zone, and a plurality of slots 9 are provided on the inner walls of the front and rear sides of the high-position grouting filling simulation box 3 of the goaf collapse zone. A baffle is added in the high-position grouting filling simulation box 3 of the goaf collapse zone through the slots 9 to adjust the effective length of the high-position grouting filling simulation box 3 of the goaf collapse zone. The experimental device base 10 can adjust the angle of the high-position grouting filling simulation box 3 of the goaf collapse zone according to the experimental requirements.

[0033] The telescopic range of the telescopic movable top plate 8 is 1000mm to 2000mm. Three small holes for installing the filling funnel 4 are arranged in the center of the left side at a spacing of 490mm, and a closable filling port 14 is arranged in the middle.

[0034] The grouting system includes a filling pump 12 and a plurality of filling funnels 4 arranged on the top of a high-position grouting simulation box 3 in the goaf collapse zone, and the outlets of the filling pump 12 are respectively connected to the inlets of the corresponding filling funnels 4 through a filling pipe 13. The lower structure 5 of the filling funnel can be adjusted in shape according to the position and angle of the high-position filling borehole and keep the shape unchanged.

[0035] The present invention provides a method for simulating the morphology of a filling body in a goaf area by high-position grouting, comprising the following steps:

[0036] 1) Determine the effective length of the high-position grouting filling simulation box 3 in the goaf collapse zone, the height of the gravel added in the box, and the lower structure of the filling funnel 4 according to the model similarity ratio; determine the end flow of the filling pipeline 13 according to the specific working conditions of the high-position grouting filling.

[0037] 2) Install the removable baffle on the right side of the high-position grouting simulation box at the designated position, adjust the length of the retractable movable top plate 8, and install the filling funnel 4 on the retractable movable top plate 8. Fill the gravel with the corresponding height and particle size, and install the retractable movable top plate 8 with the filling funnel 4 above the gravel.

[0038] 3) Use the grouting system to perform grouting at a certain flow rate, use the industrial CT scanner 2 to scan the high-position grouting filling simulation box 3 in the goaf collapse zone at certain intervals, and use the data acquisition and processing system 15 to perform three-dimensional reconstruction, and output the accumulation curve of the filling slurry on different sections in real time.

[0039] Example

[0040] The coal seam inclination of a mine in Yulin area is about 1°, with small fluctuations. The buried depth is generally 70-120m, the average thickness is 3.2m, the working face length is 200m, the roof is stable, and the roof is managed by the collapse method. The filling process of the working face is high-position grouting filling after the working face. The filling borehole spacing is 40m, the filling borehole angle with the horizontal plane is 11°, and the filling flow rate is 100m 3 / h.

[0041] 1) According to the specific parameters of high-position grouting filling in the mine, the model similarity ratio is determined to be 1:100, and the effective length of the high-position grouting filling simulation box is determined to be 2000mm, without adding baffles. According to the coal seam thickness of 3.2m and the collapse zone height calculation formula, the collapse zone height is calculated to be about 10m. According to the similarity ratio, the height of the gravel added in the box is determined to be 100mm; according to the similarity ratio, the spacing between the end holes of the grouting drilling holes is determined to be 400mm, and the lower structure of the adjacent specific filling funnel 4 is adjusted to make the spacing 400mm and the angle 11°; according to the specific working conditions of high-position grouting filling and the similarity ratio, the end flow rate of the filling pipe 13 is determined to be 0.001m 3 / h.

[0042] 2) Install the specific filling funnel 4 on the retractable movable top plate 8, and fix the lower structure of the specific filling funnel 4 to a spacing of 400 mm and an angle of 11°. Install the retractable movable top plate 8 with the specific filling funnel 4 above the gravel, and fill the gravel with a height of 100 mm from the retractable baffle filling port 14.

[0043] 3) Use the grouting system according to 0.001m 3 / h flow rate for continuous grouting, and stop grouting when the slurry fills the gravel accumulation area. The cross section of the high-position grouting simulation box 3 in the goaf collapse zone is scanned by the industrial CT scanner 2 every 5 minutes, and the data acquisition and processing system is used for three-dimensional reconstruction, and finally the accumulation curve of the filling slurry on different cross sections is output in real time. The flow range and accumulation morphology of the slurry during the high-position grouting filling process are analyzed by the output three-dimensional reconstruction image of the filling slurry, and finally the filling capacity and the determination of the key parameters of the filling process are provided.

Claims

1. A device for simulating the morphology of filling bodies in goafs by high-position grouting, characterized in that: It includes an industrial CT scanner (2), a high-position grouting filling simulation box (3) for the collapsed zone of the goaf, a grouting system and a data acquisition and processing system (15); wherein, A closable filling port (14) is provided on the top of the high-position grouting filling simulation box (3) of the goaf collapse zone; a grouting system is used to inject slurry into the high-position grouting filling simulation box (3) of the goaf collapse zone; a data acquisition and processing system (15) is used to control an industrial CT scanner (2) to scan each section of the high-position grouting filling simulation box (3) of the goaf collapse zone at different time periods, and to display the shape of the filling slurry in the high-position grouting filling simulation box (3) of the goaf collapse zone using a three-dimensional reconstruction technology, and to output in real time the accumulation curves of the filling slurry on different horizontal and vertical sections; An industrial CT scanner (2) is arranged on a CT scanner column (1); The grouting system comprises a filling pump (12) and a plurality of filling funnels (4) arranged at the top of a high-position grouting simulation box (3) in a goaf collapse zone, wherein the outlet of the filling pump (12) is connected to the inlet of the corresponding filling funnel (4) through a filling pipe (13).

2. The device for simulating the similarity of filling body shape in a goaf area by high-position grouting filling according to claim 1, characterized in that: The high-position grouting filling simulation box (3) for the collapse zone of the goaf is made of acrylic material, the bottom of which is arranged on the experimental device base (10), and one end is movably connected to the experimental device base (10) through a rotatable hinge structure; the experimental device base (10) is arranged on a slideway (11) and can reciprocate linearly along the slideway (11).

3. The device for simulating the similarity of the filling body shape in the goaf by high-position grouting filling according to claim 2 is characterized in that: A high-position grouting filling simulation box (3) for the collapsed zone of the goaf and an experimental device base (10) are supported by a plurality of retractable hydraulic cylinders (6).

4. The device for simulating the morphology of filling bodies in goafs by high-position grouting according to claim 2, characterized in that: A retractable movable top plate (8) is arranged on the top of a high-position grouting filling simulation box (3) for a goaf collapse zone, and a plurality of slots (9) are provided on the inner walls of the front and rear sides of the high-position grouting filling simulation box (3) for a goaf collapse zone. Baffles are added in the high-position grouting filling simulation box (3) for a goaf collapse zone through the slots (9) to adjust the effective length of the high-position grouting filling simulation box (3) for a goaf collapse zone.

5. The device for simulating the similarity of the filling body shape in the goaf by high-position grouting filling according to claim 4 is characterized in that: The experimental device base (10) can adjust the angle of the high-position grouting filling simulation box (3) in the goaf collapse zone according to experimental requirements.

6. The device for simulating the similarity of filling body shape in a goaf area by high-position grouting filling according to claim 4, characterized in that: The telescopic range of the telescopic movable top plate (8) is 1000mm to 2000mm.

7. The device for simulating the similarity of filling body shape in a goaf area by high-position grouting filling according to claim 1, characterized in that: The filling funnel lower structure (5) of the filling funnel (4) is in a hook-shaped bending shape, and the outlet is arranged upward.

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