A device for simulating the water accumulation in a collapse pit

Abstract

The utility model discloses a kind of collapse pit dewatering aggregation simulation test devices, it is related to testing, measurement technical field.It includes collapse pit simulation system, dewatering simulation system and information acquisition system.Collapse pit simulation system adopts box without top cover, and the collapse pit of different working conditions, filling material can be constructed, so different filling, collapse pit gradient can be simulated test;Dewatering simulation system can spray water body to collapse pit simulation system, and dewatering simulation system can control dewatering height, dewatering area, dewatering intensity and dewatering time by lifting frame, dewatering nozzle, adjustable transformer, timing socket, so that the collapse pit of multiple working conditions can be carried out dewatering aggregation similar simulation test;Information acquisition system obtains the moisture content, pressure and temperature etc. Information of inside filling of collapse pit, it is favorable to ascertain the aggregation behavior of collapse pit dewatering under different working conditions, provide basis for collapse pit ponding management, thereby reduce underground debris flow risk, guarantee mine safety and efficient production.

Description

Technical Field

[0001] This utility model belongs to the field of measurement and testing technology, and relates to the research on the treatment technology of surface subsidence pits in mine caving method, and in particular to a simulation test device for precipitation accumulation in subsidence pits. Background Technology

[0002] When mining is carried out using the caving method, the ore body caving through to the surface causes surface subsidence, making it easy for atmospheric precipitation and groundwater to accumulate in the subsidence pit. The accumulated water in the subsidence pit mixes with loose surface material and, under the influence of gravity, migrates downwards through mining-induced fractures, causing underground debris flows that result in casualties and equipment damage, posing a significant safety hazard to underground production. Therefore, it is necessary to invent a subsidence pit precipitation accumulation simulation test device to investigate the accumulation behavior of subsidence pit precipitation under different precipitation conditions, providing a basis for subsidence pit water accumulation management, thereby reducing the risk of underground debris flows and ensuring safe and efficient mine production. Utility Model Content

[0003] The purpose of this invention is to provide a simulation test device for precipitation accumulation in subsidence pits. Through its ingenious and reasonable structural design, it can realistically simulate the precipitation accumulation behavior in subsidence pits under different precipitation conditions, providing reliable and accurate data for the treatment of water accumulation in subsidence pits. This can reduce the risk of debris flows in mines, ensure safe and efficient mine production, and solve the problems existing in the prior art.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] This utility model provides a simulation test device for precipitation accumulation in subsidence pits, comprising:

[0006] A sinkhole simulation system includes a filling material and an open box, wherein the filling material is filled into the box to construct a sinkhole; the top of the filling material has a slope capable of simulating the shape of ground subsidence.

[0007] A precipitation simulation system is used to spray water into the sinkhole to simulate precipitation accumulation behavior in the sinkhole.

[0008] An information acquisition system includes a sensing component and an information acquisition instrument. The sensing component is embedded in the filling material and is capable of detecting at least the water content, pressure, and temperature of the filling material inside the collapse pit. The information acquisition instrument is communicatively connected to the sensing component to receive the detection signals from the sensing component.

[0009] In some embodiments, a drainage hole is provided at the bottom of the box;

[0010] The sinkhole simulation system also includes an angle steel frame, and the box is suspended on the angle steel frame so that the seepage hole can drain water downwards.

[0011] In some embodiments, the angle steel frame includes:

[0012] Angle steel legs are provided, and the four angle steel legs are respectively located at the four vertices of the rectangle;

[0013] The top of any two adjacent angle steel legs are connected and reinforced by the upper crossbeam;

[0014] The lower crossbeam is connected between any two adjacent angle steel legs, and the lower crossbeam is located below the upper crossbeam and arranged above the bottom end of the angle steel legs.

[0015] Multiple bottom support steel bars are provided, and any one of the bottom support steel bars is connected between the same pair of oppositely arranged lower crossbeams. The box body is set on the bottom support steel bars.

[0016] In some embodiments, the precipitation simulation system includes:

[0017] A lifting frame is installed on top of the angle steel frame and can be raised and lowered relative to the angle steel frame to adjust the water level.

[0018] A water spray nozzle, mounted on the lifting frame, is used to connect to an external water supply device to spray water into the collapse pit.

[0019] In some embodiments, the lifting frame includes:

[0020] The angle steel bracket is provided in four parts, and each of the four angle steel brackets is slidably fitted onto the top outer side of the four angle steel legs. Bolt holes are opened on the top of the two side walls of each angle steel leg, and multiple height adjustment holes are opened on the two side walls of each angle steel bracket along the height direction of the angle steel bracket. Each angle steel bracket is detachably connected to the corresponding angle steel leg by bolts.

[0021] The tops of any two adjacent angle steel supports are connected and reinforced by the support beam;

[0022] A reinforcing steel bar is connected between a pair of the support beams, and the rain spray nozzle is mounted on the reinforcing steel bar.

[0023] In some embodiments, a plurality of rainwater nozzles are spaced apart on the reinforcing steel bar, and any one of the rainwater nozzles is detachably connected to the reinforcing steel bar.

[0024] In some embodiments, the precipitation simulation system further includes a water supply device, the water supply device comprising:

[0025] Water storage tank;

[0026] A water pump is installed inside the water storage tank, and the outlet of the water pump is connected to the rainwater nozzle through a rainwater pipeline.

[0027] In some embodiments, the rainwater pipeline is fixed to the angle steel bracket by a cable tie.

[0028] In some embodiments, the water supply device further includes an adjustable transformer and a timer socket external to the water storage tank, wherein the water pump, the adjustable transformer, and the timer socket are electrically connected in sequence.

[0029] In some embodiments, the water supply device further includes a water impurity filter, which is disposed in the water storage tank and connected to the inlet of the water pump, so that the water is filtered before being delivered to the rain spray head.

[0030] In some embodiments, the enclosure is a glass enclosure, and the top of the filler is one or more combinations of a V-shaped slope, a W-shaped slope, and a wavy slope.

[0031] In some embodiments, the information acquisition device is externally mounted on the housing and is communicatively connected to the sensing component via a data transmission line; the side wall of the housing has multiple data transmission port openings along the height of the housing for the data transmission line to pass through.

[0032] The present invention achieves the following technical advantages over the prior art:

[0033] The proposed subsidence pit precipitation accumulation simulation test device includes a subsidence pit simulation system, a precipitation simulation system, and an information acquisition system. The subsidence pit simulation system uses a topless box-like structure, capable of constructing subsidence pits with different working conditions and filling materials, thus enabling simulation tests on different filling materials and subsidence pit slopes. The precipitation simulation system can spray water onto the subsidence pit simulation system to conduct similar simulation tests on precipitation accumulation in subsidence pits under various working conditions. The information acquisition system, by embedding sensors in the subsidence pit and storing the data in an information acquisition instrument via a data transmission line, obtains information such as the water content, pressure, and temperature of the filling material inside the subsidence pit. This is beneficial for understanding the precipitation accumulation behavior of subsidence pits under different working conditions, providing a basis for subsidence pit water accumulation management, thereby reducing the risk of underground debris flows and ensuring safe and efficient mine production.

[0034] The precipitation simulation system can adjust the precipitation height, precipitation area, precipitation intensity and precipitation time through the lifting frame, precipitation nozzles, adjustable transformer and timer socket. This allows the present application to conduct precipitation accumulation similar simulation tests on subsidence pits under various working conditions, which is helpful to explore the precipitation accumulation behavior of subsidence pits under different precipitation conditions and provide a basis for the treatment of water accumulation in subsidence pits. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the overall structure of the sinkhole precipitation accumulation simulation test device disclosed in this utility model embodiment;

[0037] Figure 2 This is a front view of the box body disclosed in an embodiment of this utility model;

[0038] Figure 3 This is a side view of the box body disclosed in an embodiment of the present utility model;

[0039] Figure 4 This is a top view of the box body disclosed in an embodiment of the present utility model;

[0040] Figure 5 This is a front view of the angle steel bracket disclosed in an embodiment of this utility model;

[0041] Figure 6 This is a left view of the angle steel bracket disclosed in an embodiment of this utility model;

[0042] Figure 7 This is a top view of the angle steel bracket disclosed in an embodiment of this utility model;

[0043] Figure 8 This is a front view of the lifting frame disclosed in an embodiment of this utility model;

[0044] Figure 9 This is a left view of the lifting frame disclosed in an embodiment of this utility model;

[0045] Figure 10 This is a top view of the lifting frame disclosed in an embodiment of the present utility model;

[0046] Figure 11 This is a front view of the bolt disclosed in an embodiment of the present utility model;

[0047] Figure 12 To and Figure 11Front view of the nut that fits the bolt;

[0048] Figure 13 This is a front view of the water impurity filter disclosed in an embodiment of this utility model;

[0049] Figure 14 for Figure 13 Top view of a filter for impurities in greywater;

[0050] Figure 15 This is a schematic diagram of the overall structure of the adjustable transformer disclosed in the embodiments of this utility model;

[0051] Figure 16 This is a front view of the adjustable transformer disclosed in an embodiment of this utility model;

[0052] Figure 17 This is a left view of the adjustable transformer disclosed in an embodiment of the present utility model;

[0053] Figure 18 This is a top view of the adjustable transformer disclosed in an embodiment of the present utility model.

[0054] In the figure, the attached label is: 100 - Simulation test device for precipitation accumulation in collapse pit;

[0055] 1-Angle steel bracket; 2-Height setting hole; 3-Bolt; 4-Upper crossbeam; 5-Data transmission cable port; 6-Steel hook; 7-Information acquisition instrument; 8-Data transmission cable; 9-Angle steel leg; 10-Bottom support steel bar; 11-Sensing component; 12-Water seepage hole; 13-Water impurity filter; 14-Water pump; 15-Water storage tank; 16-Adjustable transformer; 17-Timer socket; 18-Rainwater pipeline; 19-Filling material; 20-Box body; 21-Wire harness; 22-Reinforcing steel bar; 23-Rainwater sprinkler head; 24-Bracket crossbeam; 25-Lower crossbeam; 26-Sinkhole; 27-Bolt hole. Detailed Implementation

[0056] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0057] The purpose of this invention is to provide a simulation test device for precipitation accumulation in subsidence pits. Through its ingenious and reasonable structural design, it can realistically simulate the precipitation accumulation behavior in subsidence pits under different precipitation conditions, providing reliable and accurate data for the treatment of water accumulation in subsidence pits. This can reduce the risk of debris flows in mines, ensure safe and efficient mine production, and solve the problems existing in the prior art.

[0058] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0059] like Figure 1 As shown, this embodiment provides a subsidence pit precipitation accumulation simulation test device 100, including a subsidence pit simulation system, a precipitation simulation system, and an information acquisition system. The subsidence pit simulation system includes a topless box 20 and a filler 19. The filler 19 fills the inside of the box 20 to construct a subsidence pit 26, and the top opening of the box 20 is the pit opening of the subsidence pit 26. The top of the filler 19 has a slope surface that can simulate the surface subsidence pattern. The precipitation simulation system is used to spray water into the subsidence pit 26 to simulate the precipitation accumulation behavior of the subsidence pit. The information acquisition system includes a sensing component 11 and an information acquisition instrument 7. The sensing component 11 is embedded in the filler 19 and can detect at least the water content, pressure, and temperature of the filler inside the box 20 (i.e., the subsidence pit 26). The information acquisition instrument 7 is communicatively connected to the sensing component 11 to receive the detection signals from the sensing component 11. The information acquisition instrument 7 is generally preferably installed outside the box 20.

[0060] In some feasible implementations, the filler 19 can be soil-based materials such as glacial till. The composition of the filler 19 can also be adjusted appropriately according to different mine geological conditions.

[0061] In some feasible implementations, the bottom of the box 20 is provided with a seepage hole 12; the diameter of the seepage hole 12 is small, so that the filling material 19 will not leak out, but only water can seep out. Based on the bottom seepage design of the box 20, the sinkhole simulation system preferably also includes an angle steel frame, on which the box 20 is suspended to lift the box 20 off the ground, so as to ensure that the seepage hole 12 can drain downward.

[0062] Some feasible implementation methods, such as Figure 1As shown, the preferred angle steel frame includes angle steel legs 9, upper crossbeams 4, and bottom supporting steel bars 10. Four angle steel legs 9 are provided, forming a rectangular space. The four angle steel legs 9 are located at the four vertices of the rectangle, with the inner surface of each angle steel leg 9 facing the center of the rectangle. The tops of any two adjacent angle steel legs 9 are connected and reinforced by upper crossbeams 4, totaling four upper crossbeams 4. The connection methods between the four upper crossbeams 4 and the angle steel legs 9 include, but are not limited to, welding and bolting, thereby assembling the four angle steel legs 9 into a single unit. To improve the structural stability of the angle steel frame, preferably, a lower crossbeam 25 is connected between any two adjacent angle steel legs 9, such as... Figure 1 As shown, the lower crossbeam 25 is located below the upper crossbeam 4 and parallel to the upper crossbeam 4. The upper crossbeam 4 is arranged higher than the bottom end of the angle steel leg 9. The connection between the upper crossbeam 4 and the angle steel leg 9 includes, but is not limited to, welding and bolting. Multiple bottom support steel bars 10 are provided, and any one bottom support steel bar 10 is connected to the same pair of oppositely arranged lower crossbeams 25. The four lower crossbeams 25 and the multiple bottom support steel bars 10 are located on the same plane, forming a support platform near the bottom end of the angle steel frame. The bottom support steel bars 10 are the main support of this support platform. The box body 20 is set on this support platform, thereby supporting and fixing the box body 20 at a certain height above the ground.

[0063] In some feasible implementations, both the upper crossbeam 4 and the lower crossbeam 25 are preferably angle steel structures. Angle steel is existing technology and will not be described in detail here.

[0064] In some feasible implementations, the aforementioned precipitation simulation system includes a lifting frame and precipitation nozzles 23. The lifting frame is mounted on top of the angle steel support 1 and can be raised and lowered relative to the angle steel frame to adjust the precipitation height. The precipitation nozzles 23 are mounted on the lifting frame and are used to connect to an external water supply device to spray water into the collapse pit 26. The precipitation nozzles 23 are generally pressure-adjustable nozzles to control the amount of precipitation.

[0065] In some feasible implementations, the aforementioned lifting frame is integrated onto an angle steel frame, which improves the overall integration of the testing device. The lifting frame includes an angle steel bracket 1, a bracket beam 24, and reinforcing steel bars 22, such as... Figure 1As shown, four angle steel brackets 1 are provided, and each of the four angle steel brackets 1 is slidably fitted onto the top outer side of the four angle steel legs 9. Bolt holes 27 are provided on the top of each side wall of any angle steel leg 9, and multiple height adjustment holes 2 are provided on each side wall of any angle steel bracket 1 along its height direction. Each angle steel bracket 1 is detachably connected to its corresponding angle steel leg 9 by bolts 3. The tops of any two adjacent angle steel brackets 1 are connected and reinforced by support beams 24, totaling four support beams 24. The connection methods between the four support beams 24 and the angle steel brackets 1 include, but are not limited to, welding and bolting, thereby assembling the four angle steel brackets 1 into a single unit. Reinforcing steel bars 22 are connected between a pair of parallel and oppositely arranged support beams 24, and rainwater sprinklers 23 are mounted on the reinforcing steel bars 22. Each angle steel bracket 1 is made of angle steel with a side width of 30mm, a thickness of 2mm, and a length of 200mm; the four bracket crossbeams 24 and the reinforcing steel bars 22 are all made of steel bars with a width of 30mm and a thickness of 2mm.

[0066] Specifically, such as Figure 1 As shown, each of the four angle steel brackets 1 has three height adjustment holes 2 on both sides. By aligning the different height adjustment holes 2 with the bolt holes 27, the height of the entire lifting frame can be adjusted. After aligning the height adjustment holes 2 with the bolt holes 27, bolts 3 are inserted through the height adjustment holes 2 and bolt holes 27 and tightened with suitable nuts to secure the angle steel bracket 1 to the angle steel leg 9, thus locking the lifting frame at the top of the angle steel frame. When adjusting the height of the lifting frame, all bolts 3 on the four angle steel brackets 1 are loosened and removed. Then, the other height adjustment holes 2 are aligned with the bolt holes 27, and bolts 3 and nuts are tightened to secure them. The height adjustment holes 2 and bolt holes 27 are preferably circular holes with a diameter of 10mm; correspondingly, the bolts 3 used are preferably M8 bolts.

[0067] The height adjustment and locking positioning method of the aforementioned lifting frame is reliable, easy to adjust, low in cost, and easy to implement. Both the lifting frame and the angle steel frame use angle steel structures, providing a reliable support structure for the testing device. Specifically, it is preferable that the angle steel used in the lifting frame and the angle steel frame have the same structure, for example, the angle steel has a side width of 30mm, a thickness of 2mm, and the length can be selected according to different installation positions.

[0068] In some feasible implementations, multiple rainwater sprinklers 23 are spaced apart on the reinforcing steel bar 22, and each rainwater sprinkler 23 is detachably connected to the reinforcing steel bar 22. This allows for the installation and removal of the rainwater sprinklers 23 on the reinforcing steel bar 22 as needed, thereby enabling adjustments to the number and spacing of the rainwater sprinklers 23, and thus allowing for the adjustment of the rainfall area and rainfall region. The rainwater sprinklers 23 are existing technology and can be detachably connected to the reinforcing steel bar 22 through bolt fixing, sleeve installation, or other methods. The bolt fixing method is relatively conventional, which involves using bolts and matching nuts to fix the nozzle to the reinforcing steel bar. The sleeve installation involves installing a sleeve on the top of the rainwater nozzle 23, and the sleeve is movably fitted onto the outside of the reinforcing steel bar 22. The reinforcing steel bar 22 has multiple internal threaded holes along its axial direction, and the sleeve has a positioning hole. By aligning the positioning hole on the sleeve with one of the internal threaded holes, the sleeve can be fixed to the reinforcing steel bar 22 by screwing a screw or bolt into the internal threaded hole. Conversely, when it is necessary to adjust the position of the nozzle, the screw or bolt is loosened and removed, and then the sleeve is slid to move the nozzle synchronously. After moving to the desired position, the sleeve is fixed to the reinforcing steel bar 22 again with screws or bolts.

[0069] In some feasible implementations, the precipitation simulation system also includes a water supply device, such as... Figure 1 As shown, the water supply device includes a water storage tank 15 and a water pump 14. The water storage tank 15 holds the water to be sprayed. The water pump 14 is located inside the water storage tank 15 and submerged in the water. The outlet of the water pump 14 is connected to each rainwater nozzle 23 via a rainwater pipeline 18 to supply water to each rainwater nozzle 23. The rainwater pipeline 18 is mainly used for water source transportation. To avoid the pipeline being complicated and messy, it is preferable to use a cable tie 21 to tie the rainwater pipeline 18 to the lifting frame. The cable tie 21 is an existing cable tie structure with a self-locking function, which is easy to install and remove, low in cost, and allows for flexible adjustment of the fixed position of the rainwater pipeline 18.

[0070] The rainwater pipeline 18 can be connected to the inlet of each rainwater nozzle 23 via a tee or other pipe fitting structure. The pipe fittings used for the nozzles are mature existing technologies, such as rotary rainwater nozzles that can achieve rainwater atomization effects. The specific structure and working principle will not be described in detail here.

[0071] In some feasible implementations, the water supply device also includes an adjustable transformer 16 and a timer socket 17 externally mounted on the water storage tank 15, with the water pump 14, adjustable transformer 16, and timer socket 17 electrically connected in sequence. The precipitation simulation system connects the water pump 14 and the power supply through the adjustable transformer 16 and timer socket 17, enabling the regulation of different precipitation intensities and durations. The precipitation duration is mainly controlled by the timer socket 17; the precipitation intensity can be controlled by adjusting the pressure of the water pump 14.

[0072] In some feasible embodiments, the water supply device also includes a water impurity filter 13, which is disposed in the water storage tank 15 and connected to the inlet of the water pump 14. The water impurity filter 13 is used to filter impurities so that the water is filtered before entering the water pump 14, thereby protecting the water pump 14.

[0073] like Figure 13 and Figure 14 As shown, the main body of the water impurity filter 13 is composed of two steel rings and four steel bars welded together, which increases gravity and allows it to sink to the bottom. The larger steel ring has a diameter of 20mm, and the smaller one has a diameter of 10mm. The steel bars are 20mm long and 2mm in diameter. The two rings are connected by four steel bars, ensuring their centers are on the same vertical line. The assembled shape is a frustum, surrounded by a filter screen with a mesh size of 0.5mm to filter water impurities. A hollow cylinder with an outer diameter of 10mm, an inner diameter of 8mm, and a height of 10mm is glued to the smaller ring of the frustum. This hollow cylinder will be inserted into the water pump inlet pipe (inlet). Besides the above structure, the water impurity filter 13 can also use other filter products.

[0074] In some feasible implementations, the box 20 is preferably a glass box, i.e., it is assembled and glued together from multiple glass panels. Specifically, five acrylic panels can be glued together with strong adhesive to form a topless acrylic box. The four lower crossbeams 25 of the angle steel frame support the four sides of the bottom surface of the acrylic box and cover the four sides of the bottom surface of the box, so as to cooperate with the bottom support steel strips 10 to support the bottom of the box 20. At the same time, four angle steel legs 9 are distributed on the outer perimeter of the acrylic box and cover the four sides of the box, which can serve to support and protect the outside of the box 20. As a preferred embodiment, two bottom support steel strips 10, 30mm wide and 2mm thick, can be welded vertically and equally spaced between the front and rear angle steels at the bottom of the acrylic box to support the acrylic box.

[0075] A specific feasible solution: The inner wall dimensions of the aforementioned open-top acrylic glass box are 500×200×400mm (length×width×height), and each glass panel is 10mm thick. The transparent glass allows for direct observation of the interior from the outside, and also allows for recording of the experimental changes within the box using image acquisition devices such as cameras. The acrylic glass panels on the front, back, left, and right sides of the box are marked with graduations every 50mm from bottom to top to record information on precipitation infiltration in the subsidence pit. Perforations are drilled every 50mm on the bottom acrylic glass panel, resulting in 27 perforations (3 rows × 9 columns) with a diameter of 10mm, to allow water to drain from the box.

[0076] In some feasible implementations, the top of the filling 19 inside the box 20 is one or more combinations of a V-shaped slope, a W-shaped slope, and a wavy slope. For example... Figure 1 As shown, the top of the filler 19 is a V-shaped slope. The shape and slope of the top slope of the filler 19, as well as the material of the filler 19, can all be manually adjusted to simulate sinkholes under different working conditions.

[0077] In some feasible implementations, the information acquisition device is preferably externally mounted in the housing 20 and communicates with the sensing component 11 via a data transmission line 8. The side wall of the housing 20 has multiple data transmission line ports 5 along its height for the data transmission line 8 to pass through. Depending on the embedding depth of the sensing component 11, the data transmission line 8 can be passed through the data transmission line ports 5 at different heights. Based on this, steel hooks 6 are also installed on the outside of the angle steel legs 9 to suspend the information acquisition device 7, adapting to the height position of the data transmission line 8.

[0078] The data acquisition instrument 7 is externally mounted in the enclosure 20, which ensures that the acquisition instrument is in a dry and water-free environment, protecting the test equipment and data.

[0079] The sensing component 11 can be a multi-functional measuring instrument that can simultaneously measure the moisture content, temperature and pressure of the filling material; it can also include three detection components: a moisture measuring instrument, a pressure measuring instrument and a temperature measuring instrument, so that the moisture content, pressure and temperature of the filling material in the box can be measured by the moisture measuring instrument, the pressure measuring instrument and the temperature measuring instrument respectively.

[0080] A specific feasible solution: On one side of the plexiglass plate of the enclosure 20, holes are drilled every 50mm from top to bottom to form data transmission line ports 5, and the diameter of the holes of the data transmission line ports 5 is 10mm.

[0081] Taking the length of the angle steel leg 9 as 600mm as an example, a steel hook 6 can be welded and fixed 200mm from top to bottom; a lower crossbeam 25 can be welded 400mm from top to bottom; the extra 200mm at the bottom is used to support the entire test device, while allowing water to seep out smoothly from the device.

[0082] The proposed subsidence pit precipitation accumulation simulation test device 100 includes a subsidence pit simulation system, a precipitation simulation system, and an information acquisition system. The subsidence pit simulation system uses an open-top plexiglass box, capable of constructing subsidence pits with different working conditions and filling materials, thus enabling simulation tests on different filling materials and subsidence pit slopes. The precipitation simulation system can adjust the precipitation height, precipitation area, precipitation intensity, and precipitation time via a lifting frame, precipitation nozzles, adjustable transformer, and timer socket. This allows the device to conduct similar simulation tests on precipitation accumulation in subsidence pits under various working conditions, facilitating the investigation of precipitation accumulation behavior in subsidence pits under different precipitation conditions. This provides a basis for subsidence pit water accumulation management, thereby reducing the risk of underground debris flows and ensuring safe and efficient mine production.

[0083] The precipitation simulation system uses a lifting frame to install precipitation nozzles, which can adjust the precipitation height and thus simulate different precipitation conditions.

[0084] The precipitation simulation system connects the water pump and power supply through an adjustable transformer and a timer socket, enabling the control of different precipitation intensities and durations, thereby further enriching the types of work condition simulations.

[0085] The rainwater pipeline is tied to the angle steel frame and the lifting frame with cable ties, which enables a stable water supply.

[0086] The rain sprinkler head is a rotary type, which can achieve the atomization effect of the rain.

[0087] The information acquisition system obtains information such as the water content, pressure, and temperature of the filling material inside the subsidence pit by burying sensing components in the pit and storing the data to the information acquisition instrument via a data transmission line.

[0088] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0089] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A simulation test device for precipitation accumulation in subsidence pits, characterized in that, include: A sinkhole simulation system includes a filler (19) and an open box (20), wherein the filler (19) is filled into the box (20) to construct a sinkhole (26); the top of the filler (19) has a slope capable of simulating the shape of ground subsidence. A precipitation simulation system is used to spray water into the sinkhole (26) to simulate precipitation accumulation behavior in the sinkhole; The information acquisition system includes a sensing component (11) and an information acquisition instrument (7). The sensing component (11) is embedded in the filling material (19) and can detect at least the water content, pressure and temperature of the filling material (19) inside the sinkhole (26). The information acquisition instrument (7) is communicatively connected to the sensing component (11) to receive the detection signal of the sensing component (11).

2. The subsidence pit precipitation accumulation simulation test device according to claim 1, characterized in that, The bottom of the box (20) is provided with a water seepage hole (12); The sinkhole simulation system also includes an angle steel frame, and the box (20) is suspended on the angle steel frame so that the seepage hole (12) can drain water downward.

3. The subsidence pit precipitation accumulation simulation test device according to claim 2, characterized in that, The angle steel frame includes: Angle steel legs (9) are provided in four pieces, and the four angle steel legs (9) are respectively located at the four vertices of the rectangle; The top of any two adjacent angle steel legs (9) are connected and reinforced by the upper crossbeam (4); The lower crossbeam (25) is connected between any two adjacent angle steel legs (9), and the lower crossbeam (25) is located below the upper crossbeam (4) and arranged above the bottom end of the angle steel legs (9); There are multiple bottom support steel bars (10), and any one of the bottom support steel bars (10) is connected between the same pair of oppositely arranged lower crossbeams (25). The box body (20) is set on the bottom support steel bars (10).

4. The subsidence pit precipitation accumulation simulation test device according to claim 3, characterized in that, The precipitation simulation system includes: A lifting frame is installed on top of the angle steel frame and can be raised and lowered relative to the angle steel frame to adjust the water level. A water spray nozzle (23) is installed on the lifting frame and is used to connect to an external water supply device to spray water into the sinkhole (26).

5. The subsidence pit precipitation accumulation simulation test device according to claim 4, characterized in that, The lifting frame includes: Angle steel bracket (1) is provided in four pieces, and the four angle steel brackets (1) are slidably fitted on the top outer side of the four angle steel legs (9). Bolt holes (27) are opened on the top of the two side walls of any angle steel leg (9). Multiple height stop holes (2) are opened on the two side walls of any angle steel bracket (1) along the height direction of the angle steel bracket (1). Any angle steel bracket (1) is detachably connected to the corresponding angle steel leg (9) by bolts (3). The tops of any two adjacent angle steel supports (1) are connected and reinforced by the support beam (24); A reinforcing steel bar (22) is connected between a pair of the support beams (24), and the rain spray nozzle (23) is mounted on the reinforcing steel bar (22).

6. The subsidence pit precipitation accumulation simulation test device according to claim 5, characterized in that, Multiple rain nozzles (23) are spaced apart on the reinforcing steel bar (22), and any one of the rain nozzles (23) is detachably connected to the reinforcing steel bar (22).

7. The subsidence pit precipitation accumulation simulation test device according to claim 5, characterized in that, The precipitation simulation system also includes a water supply device, which comprises: Water storage tank (15); A water pump (14) is installed inside the water storage tank (15), and the outlet of the water pump (14) is connected to the rainwater nozzle (23) through a rainwater pipeline (18).

8. The subsidence pit precipitation accumulation simulation test device according to claim 7, characterized in that, The water supply device also includes an adjustable transformer (16) and a timer socket (17) externally mounted on the water storage tank (15), and the water pump (14), the adjustable transformer (16) and the timer socket (17) are electrically connected in sequence.

9. The subsidence pit precipitation accumulation simulation test device according to claim 7 or 8, characterized in that, The water supply device also includes a water impurity filter (13), which is installed in the water storage tank (15) and connected to the inlet of the water pump (14) so ​​that the water is filtered before being delivered to the rain spray head (23).

10. The sinkhole precipitation accumulation simulation test device according to any one of claims 1-8, characterized in that, The box (20) is a glass box, and the top of the filler (19) is one or more combinations of V-shaped slope, W-shaped slope and wavy slope.

Images