Filling body water quality detection device and its usage method

Abstract

The present invention provides a filling body water quality detection device and a method for using the same. The filling body water quality detection device includes a mold for making a detection test block with a predetermined size from the filling slurry of the filling body, an external frame for placing the detection test block, a groundwater input device arranged on the upper part of the external frame, a seepage water collection device arranged on the lower part of the external frame, and a fixing device for fixedly connecting the groundwater input device and the seepage water collection device. The method for using this device is as follows: First, pour the filling slurry into the mold to prepare the detection test block; then assemble it into a filling water quality detection device to collect the seepage water of the filling body and detect the water quality; finally, judge the influence of the filling body on the seepage water quality by analyzing the water quality of the collected seepage water. Compared with the traditional method, the method provided by the present invention is closer to the underground environment, and the obtained detection data is more accurate and reliable.

Description

Technical Field

[0001] The present invention relates to the fields of mining engineering and water quality detection, and particularly to a water quality detection device for filling bodies and a using method thereof. Background Art

[0002] With the continuous improvement of the country's attention to environmental protection, green mining has gradually become the main development direction of major domestic mines. And adopting the filling method is the safest and most efficient way to achieve green mining. Filling the tailings underground can not only improve the ore recovery rate, prevent the caving of the overlying rock strata of the mine and surface subsidence so as to protect the surface of the mining area, but also greatly reduce the occupation of land for tailings stacking and reduce or eliminate the remaining safety hazards such as tailings ponds.

[0003] However, when using the filling method for mining, the filling body contains certain amounts of toxic and harmful substances such as heavy metal ions and ore dressing agents. After filling, some heavy metal elements, fluoride ions, etc. may be dissolved under the action of groundwater immersion, seepage and leaching. The release and migration of these harmful substances will cause certain pollution to the groundwater environment and even damage the groundwater environment. Moreover, this kind of pollution often has characteristics such as concealment, irreversibility, migration, long-term nature and diversity of pollutants, which will threaten the safe production and sustainable production of the mine. Therefore, it is necessary to detect the water quality of the seepage water after the groundwater seeps through the filling body. At present, a large number of studies on the water quality detection and analysis after the groundwater seeps through the filling body have been carried out.

[0004] The invention patent with the application number CN201510208552.6 discloses a method for evaluating the influence of cemented filling of tailings in metal mines on the heavy metal content in groundwater. This method uses the drip irrigation immersion method to measure the influence of the filling body water quality and provides an influence evaluation method. The disadvantages of this method are as follows: Although a complete evaluation method for the influence of the filling body water quality is proposed, the groundwater water samples obtained by the static leaching method are quite different from the actual situation on site due to the influence of groundwater pressure and the seepage characteristics of the filling body. In addition, the test period of this method is relatively long, and there will be a large error in using its evaluation results to guide production.

[0005] The invention patent application No. CN201810109654.6 discloses a collection device for detecting and sampling heavy metal ions in a goaf filled with coal gangue and a connecting pipe supporting the same. For the collection device and the connecting pipe, the inner part of the pipe body is equally divided into a plurality of longitudinal channels by a water isolation plate. A water permeable opening is arranged on one longitudinal channel of the collection device, and the connecting pipe has no water permeable opening. The collection device is gradually arranged in the goaf as the mining face advances, and is connected into rows of pipelines by the connecting pipe to form uniformly arranged sampling points, constituting a sampling system, which can realize real-time uniform sampling of heavy metal ions in the goaf and provide a sampling means for further analyzing the heavy metal pollution in the goaf. However, the disadvantage of this method is that the collection device needs to arrange collection and sampling pipes in the goaf, and the collected water samples also include the accumulated water in the non-goaf mine. The collected water samples cannot ensure that they are the seepage water of the filling body, and the influence degree of the filling body on the water quality cannot be determined.

[0006] The invention patent application No. CN201810109458.9 discloses a heavy metal ion detection and sampling system for a coal gangue filled coal mine goaf, and sampling pipes are erected inside the goaf to collect the accumulated water in the goaf mine. This sampling system needs to arrange sampling pipes in the goaf, and its safety cannot be guaranteed, and the cost is relatively high. In addition, the water samples collected by this sampling system also include the accumulated water in the non-goaf mine. The collected water samples cannot ensure that they are the seepage water of the filling body, and the influence degree of the filling body on the water quality cannot be determined.

[0007] In view of this, there is currently no practical and reliable method to evaluate the content of toxic and harmful substances in the seepage water quality of the filling body. The test environment is quite different from the actual situation, and it cannot accurately judge its influence degree, and the influencing factors of the evaluation device and method cannot be excluded. Therefore, it is necessary to develop a detection device for the seepage water quality of the filling body to evaluate and analyze the content of toxic and harmful substances in the seepage water quality of the mine filling stope. Summary of the Invention

[0008] Aiming at the above deficiencies of the prior art, the purpose of the present invention is to provide a filling body water quality detection device and its use method, which are used to truly simulate the seepage process of groundwater in the filling body and reliably evaluate and analyze the content of toxic and harmful substances in the seepage water quality of the filling body.

[0009] To achieve the above invention purpose, the present invention provides a filling body water quality detection device for detecting the water quality of the filling body based on the laminar flow state; the filling body water quality detection device includes a mold for making the filling slurry of the filling body into a detection test block of a predetermined size, an external frame for placing the detection test block, a groundwater input device arranged on the upper part of the external frame, a seepage water collection device arranged on the lower part of the external frame, and a fixing device for fixedly connecting the groundwater input device and the seepage water collection device;

[0010] The groundwater input device includes a groundwater input cover plate, a first groove provided on the groundwater input cover plate with an opening facing the seepage water collection device, a groundwater input pipeline with one end connected to the first groove, an extension wall protruding from the peripheral wall of the first groove towards the seepage water collection device, and a first waterproof rubber ring sleeved on the outer periphery of the extension wall; the other end of the groundwater input pipeline is connected to a groundwater input container;

[0011] The seepage water collection device includes a seepage water collection cover plate, a second groove provided on the seepage water collection cover plate, a seepage water collection pipeline with one end connected to the second groove, a protruding wall protruding from the peripheral wall of the second groove towards the groundwater input device, and a second waterproof rubber ring sleeved on the outer periphery of the protruding wall; the other end of the seepage water collection pipeline is connected to a seepage water collection container;

[0012] The central axes of the first groove and the second groove coincide with each other, and the projected area of the second groove on the first groove is less than or equal to one-half of the projected area of the first groove.

[0013] Preferably, both the first groove and the second groove are circular grooves, and the diameter of the second groove is less than or equal to one-half of the diameter of the first groove.

[0014] Preferably, the length and width dimensions of the groundwater input cover plate are the same as those of the seepage water collection cover plate, and the length and width dimensions of both are the same as the length and width dimensions of the inner periphery of the outer frame; the first groove is provided at the middle position of the groundwater input cover plate, and the second groove is provided at the middle position of the seepage water collection cover plate.

[0015] Preferably, the mold includes a mold frame arranged oppositely and a mold cover plate covering the mold frame; a first convex ring is provided at the middle position of the lower surface of the mold cover plate, and a second convex ring is provided at the middle position of the upper surface of the bottom plate of the mold frame; the inner diameter of the first convex ring is the same as the diameter of the first groove, and the inner diameter of the second convex ring is the same as the diameter of the second groove.

[0016] Preferably, the outer frame is a rectangular frame with upper and lower openings assembled by steel plates.

[0017] In order to achieve the above-mentioned invention purpose, the present invention also provides a usage method of the above-mentioned filling body water quality detection device, including the following steps:

[0018] S1. Fabricate the test block: Provide a mold, which includes a mold frame arranged oppositely and a mold cover plate covering the mold frame; at the middle position of the lower surface of the mold cover plate, a first convex ring is provided, and at the middle position of the upper surface of the bottom plate of the mold frame, a second convex ring is provided; take a predetermined volume of filling slurry, pour the filling slurry into the mold frame, cover the mold cover plate, cure it according to the concrete curing standard for 28 days, and then remove the mold frame and the mold cover plate to prepare the test block with the same inner peripheral dimensions as the mold; a first annular groove with the same size as the first convex ring is formed on the upper surface of the test block, and a second annular groove with the same size as the second convex ring is formed on the lower surface of the test block;

[0019] S2. Assemble the filling body water quality detection device: Place the test block in the outer frame, align the first waterproof rubber ring of the groundwater input device with the first annular groove and press it tightly to form a sealed structure; align the second waterproof rubber ring of the seepage water collection device with the second annular groove and press it tightly to form a sealed structure; use the fixing device to achieve the fixed support and horizontal adjustment of the filling body water quality detection device; connect the groundwater input pipeline with the groundwater input container, and connect the seepage water collection pipeline with the seepage water collection container;

[0020] S3. Detect the seepage water quality of the test block: Collect mine groundwater and inject it into the groundwater input container, and set the pressure of the groundwater to the groundwater pressure in the mine filling stope; the groundwater first enters the first groove through the groundwater input pipeline, then enters the second groove through the test block, and the collected seepage water flows into the seepage water collection container through the seepage water collection pipeline and finally enters the filling body water quality detection device;

[0021] S4. Analyze the influence of the seepage water quality of the filling body: Record the detection time of collecting the seepage water in step S3, extract a predetermined amount of water quality samples from the seepage water collection container, conduct water quality detection on the water quality samples, and analyze whether the water quality samples meet the standard requirements.

[0022] Preferably, the first annular groove and the first waterproof rubber ring fit together; the second annular groove and the second waterproof rubber ring fit together.

[0023] Preferably, in step S3, the setting method of the groundwater pressure is: by adjusting the relative height difference between the groundwater input container and the filling body water quality detection device and / or by using a pressure pump to set the pressure of the groundwater to the groundwater pressure in the mine filling stope.

[0024] Preferably, the water quality detection includes but is not limited to the detection of the content of toxic and harmful substances and the detection of pH value.

[0025] Preferably, the inner diameter of the first convex ring is greater than or equal to twice the inner diameter of the second convex ring to ensure that the collected seepage water is laminar partial seepage water.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] 1. The filling body water quality detection device provided by the present invention ensures that all the collected water in the seepage water collection device is laminar partial seepage water by setting the inner diameter of the first annular groove to be greater than or equal to twice that of the second annular groove, avoiding the influence of the water collected from flowing directly through the side wall without laminar flow on the detection result in the prior art, improving the accuracy of the laminar water detection result. The flow of this part of the seepage water is stable and less affected by interference factors. The obtained detection result can be used for theoretical calculation to deduce the filling water quality detection under other flow states, which has good theoretical significance.

[0028] 2. The filling body water quality detection device provided by the present invention ensures that a closed structure is formed between the first groove in the groundwater input device and the upper surface of the test block, and a closed structure is formed between the second groove in the seepage water collection device and the lower surface of the test block through the mutual fitting of the waterproof rubber ring and the annular groove, so as to ensure that the detection device can withstand a certain groundwater input water pressure and the whole device will not leak, and can truly simulate the seepage process of groundwater in the filling body and effectively collect the seepage water.

[0029] 3. The filling body water quality detection device provided by the present invention is made of the actual filling slurry of the mine filling station for the material of the test block, and is also cured for 28 days according to the actual concrete curing standard before detection. At the same time, the groundwater pressure input into the device is the actual water pressure of the mine filling stope. Therefore, the device can truly restore the environment of the underground filling body during detection, the detection result is more consistent with the actual situation, and the detection data is more accurate.

[0030] 4. The use method of the filling body water quality detection device provided by the present invention is safe and reasonable in operation and the operation process is simple. It can also truly simulate the seepage process of groundwater in the filling body. The detected data is accurate, the detection result is reasonable and standard, and it has certain practical guiding significance. At the same time, the filling body water quality detection device provided by the present invention has a low production cost, a reasonable process safety design, and has application potential. Description of the Drawings

[0031] Figure 1 It is a schematic structural diagram of the mold in the filling body water quality detection device provided by the present invention.

[0032] Figure 2 Schematic structural diagram of the mold in the filling body water quality detection device provided by the present invention from another angle.

[0033] Figure 3 Schematic structural diagram of the test block in the filling body water quality detection device provided by the present invention.

[0034] Figure 4 Schematic structural diagram of the test block in the filling body water quality detection device provided by the present invention from another angle.

[0035] Figure 5 Schematic structural diagram of the filling body water quality detection device provided by the present invention.

[0036] Figure 6 Schematic structural diagram of the filling body water quality detection device provided by the present invention from another angle.

[0037] Figure 7 Stereogram of the outer frame in the filling body water quality detection device provided by the present invention.

[0038] Figure 8 Schematic diagram of seepage streamline in the using method of the filling body water quality detection device provided by the present invention.

[0039] Reference numerals:

[0040] 1. Mold; 11. Mold frame; 12. Mold cover plate; 13. First convex ring; 14. Second convex ring;

[0041] 2. Test block; 21. First annular groove; 22. Second annular groove;

[0042] 3. Groundwater input device; 31. Groundwater input pipeline; 32. Groundwater input cover plate; 33. First groove; 34. First waterproof rubber ring; 35. Extension wall;

[0043] 4. Seepage water collection device; 41. Seepage water collection pipeline; 42. Seepage water collection cover plate; 43. Second groove; 44. Second waterproof rubber ring; 45. Protruding wall;

[0044] 5. Outer frame;

[0045] 6. Fixed support device; 61. Lead screw; 62. Fixed nut; 63. Fixed ear piece;

[0046] 7. Stable streamline; 8. Seepage streamline. Detailed implementation manners

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope protected by the present invention.

[0048] Please refer to Figures 1-7 As shown, the present invention provides a filling body water quality detection device for detecting the water quality of the filling body based on the laminar flow state; the filling body water quality detection device includes a mold 1 for making the filling slurry of the filling body into a detection test block 2 of a predetermined size, an outer frame 5 for placing the detection test block 2, a groundwater input device 3 provided on the upper part of the outer frame 5, a seepage water collection device 4 provided on the lower part of the outer frame 5, and a fixing device 6 for fixedly connecting the groundwater input device 3 and the seepage water collection device 4.

[0049] Please refer to Figures 1-2 As shown, the mold 1 includes a mold frame 11 arranged oppositely and a mold cover plate 12 covering the mold frame 11. A first convex ring 13 is provided at the middle position of the lower surface of the mold cover plate 12, and a second convex ring 14 is provided at the middle position of the upper surface of the bottom plate of the mold frame 11.

[0050] Please refer to Figures 5-6 As shown, the groundwater input device 3 includes a groundwater input cover plate 32, a first groove 33 provided on the groundwater input cover plate 32 with an opening facing the seepage water collection device 4, a groundwater input pipeline 31 with one end connected to the first groove 33, an extension wall 35 protruding from the peripheral wall of the first groove 33 towards the seepage water collection device 4, and a first waterproof rubber ring 34 sleeved on the outer periphery of the extension wall 35. The other end of the groundwater input pipeline 31 is connected to a groundwater input container. The first groove 33 is provided at the middle position of the groundwater input cover plate 32, and the diameter of the first groove 33 is the same as the inner diameter of the first convex ring 13.

[0051] Please refer to Figures 5-6As shown, the seepage water collection device 4 includes a seepage water collection cover plate 42, a second groove 43 provided on the seepage water collection cover plate 42, a seepage water collection pipeline 41 with one end connected to the second groove 43, a protruding wall 45 protruding from the peripheral wall of the second groove 43 towards the groundwater input device 3, and a second waterproof rubber ring 44 sleeved on the outer periphery of the protruding wall 45. The other end of the seepage water collection pipeline 41 is connected to a seepage water collection container. The second groove 43 is provided at the middle position of the seepage water collection cover plate 42. The diameter of the second groove 43 is the same as the inner diameter of the second convex ring 14.

[0052] The length and width dimensions of the groundwater input cover plate 32 are the same as those of the seepage water collection cover plate 42, and the length and width dimensions of both are the same as the length and width dimensions of the inner periphery of the outer frame 5.

[0053] The central axes of the first groove 33 and the second groove 43 coincide with each other. In this embodiment, both the first groove 33 and the second groove 43 are circular grooves, and the diameter of the second groove 43 is less than or equal to half of the diameter of the first groove 33.

[0054] Please refer to Figures 5-6 As shown, the fixed support device 6 includes a lead screw 61, a fixed nut 62 adapted to the lead screw 61, and fixed ear pieces 63; one ends of the fixed ear pieces 63 are respectively fixedly connected to the four corners of the lower surface of the seepage water collection cover plate 42 and the four corners of the upper surface of the groundwater input cover plate 32 and are symmetric in the vertical direction, and the other ends are detachably connected to the fixed nut 62 to realize the fixation and vertical adjustment of the filling body water quality detection device; the filling body water quality detection device is supported by the lead screw 61.

[0055] Please refer to Figure 7 As shown, the outer frame 5 is a rectangular frame with upper and lower openings assembled by steel plates.

[0056] The usage principle of the filling body water quality detection device of the present invention will be described in detail below in combination with specific embodiments.

[0057] Taking the filling body of a certain heavy metal mine as an example for filling body water quality detection, the groundwater pressure at a certain stope of this mine is 0.1 MPa.

[0058] The dimensions of the filling body water quality detection device are as follows:

[0059] As Figures 1-2As shown in the figure, the mold frame 11 is a square frame assembled from steel plates, with a length of 1 m, a width of 1 m, a height of 0.5 m, and a thickness of 0.02 m. In the center of the bottom plate of the mold frame 11, there is a second convex ring 14 with an inner diameter of 0.4 m, an outer diameter of 0.42 m, and a thickness of 0.01 m. The mold cover plate 12 is a cover plate assembled from steel plates, with a length of 1 m, a width of 1 m, and a thickness of 0.01 m. In the center below the mold cover plate 12, there is a first convex ring 13 with an inner diameter of 0.8 m, an outer diameter of 0.82 m, and a thickness of 0.01 m.

[0060] As Figures 5-6 shown, the groundwater input cover plate 32 has dimensions of 1 m in length, 1 m in width, and 0.02 m in thickness, and a first groove 33 with a diameter of 0.8 m and a depth of 0.01 m is provided at its middle position.

[0061] The difference between the outer diameter of the first waterproof rubber ring 34 and the inner diameter of the extension wall 35 is slightly larger than the difference between the inner and outer diameters of the first convex ring 13, so that the first waterproof rubber ring 34 can form an interference fit with the first annular groove 21 to form a waterproof and airtight structure.

[0062] The seepage water collection cover plate 42 has dimensions of 1 m in length, 1 m in width, and 0.02 m in thickness, and a second groove 43 with a diameter of 0.4 m and a depth of 0.01 m is provided at its middle position.

[0063] The difference between the outer diameter of the second waterproof rubber ring 44 and the inner diameter of the protruding wall 45 is slightly larger than the difference between the inner and outer diameters of the second convex ring 14, so that the second waterproof rubber ring 44 can form an interference fit with the second annular groove 22 to form a waterproof and airtight structure.

[0064] As another preferred solution of the present invention, the first waterproof rubber ring 34 is sleeved on the inner circumference of the extension wall 35, and the second waterproof rubber ring 44 is sleeved on the inner circumference of the protruding wall 45. The difference between the inner diameter of the first waterproof rubber ring 34 and the outer diameter of the extension wall 35 is slightly larger than the difference between the inner and outer diameters of the first convex ring 13, so that the first waterproof rubber ring 34 can form an interference fit with the first annular groove 21 to form a waterproof and airtight structure; the difference between the inner diameter of the second waterproof rubber ring 44 and the outer diameter of the protruding wall 45 is slightly larger than the difference between the inner and outer diameters of the second convex ring 14, so that the second waterproof rubber ring 44 can form an interference fit with the second annular groove 22 to form a waterproof and airtight structure.

[0065] It should be noted that those skilled in the art should understand that as another preferred solution of this solution, the first waterproof rubber ring 34 can also be directly pasted on the outer edge of the first groove 33, and the first waterproof rubber ring 34 directly forms an interference fit with the first annular groove 21 to form a waterproof and airtight structure; the second waterproof rubber ring 44 can also be directly pasted on the outer edge of the second groove 43, and the second waterproof rubber ring 44 directly forms an interference fit with the second annular groove 22 to form a waterproof and airtight structure.

[0066] As shown Figure 7 in the figure, the external frame 5 is a rectangular frame with an internal size of 1 m in length, 1 m in width, and 0.02 m in thickness, and is open at the top and bottom.

[0067] It should be noted that those skilled in the art should understand that the filling body water quality detection device can also adjust the size according to the actual situation of the mine filling slurry and stope filling.

[0068] Please refer to Figures 1 to 8 shown in the figure. Based on the laminar flow state, the usage method of the filling body water quality detection device provided in Embodiment 1 of the present invention includes the following steps:

[0069] S1. Fabricate the test block 2:

[0070] Take a predetermined volume of filling slurry from the blanking port of the mine filling station, pour the filling slurry into the mold frame 11, cover the mold cover plate 12, and remove the mold frame 11 and the mold cover plate 12 after curing for 28 days according to the concrete curing standard to prepare the test block 2; from the three-dimensional dimensions of the mold 1, it can be seen that the upper surface of the test block 2 is provided with the first annular groove 21 having the same size as the first convex ring 13; the lower surface of the test block 2 is provided with the second annular groove 22 having the same size as the second convex ring 14.

[0071] S2. Assemble the filling body water quality detection device:

[0072] Place the test block 2 in the external frame 5, align the first waterproof rubber ring 34 on the groundwater input device 3 with the first annular groove 21 on the test block 2 and press it tightly to form a sealed structure; align the second waterproof rubber ring 44 on the seepage water collection device 4 with the second annular groove 22 on the test block 2 and press it tightly to form a sealed structure; use the lead screw 61 with four fixing nuts 62 to connect the corresponding upper and lower fixing lugs 63 in series, adjust the position of the fixing nuts 62 to keep the filling body water quality detection device horizontal, add four fixing nuts 62 to the lead screw 62, and tighten them simultaneously to make the first waterproof rubber ring 34 and the second waterproof rubber ring 44 completely fit with the first annular groove 21 and the second annular groove 22 respectively; use the fixed support device 6 to fix and support the filling body water quality detection device and adjust its level; connect the groundwater input pipeline 31 to the groundwater input container, and connect the seepage water collection pipeline 41 to the seepage water collection container.

[0073] S3. Detect the seepage water quality of the test block 2:

[0074] Collect the groundwater in the mine and inject it into the groundwater input container. Adjust the water pressure of the input groundwater to 0.1 MPa through a pressure pump, and the groundwater enters the device through the groundwater input pipeline 31. Since the first waterproof rubber ring 34 and the second waterproof rubber ring 44 are completely mated with the first annular groove 21 and the second annular groove 22 respectively, it can ensure that the experimental device can withstand a certain groundwater pressure and will not leak, and can truly simulate the seepage process of groundwater in the filling body. According to the sizes of the first annular groove 21 and the second annular groove 22 of the test block 2, the seepage flow lines of the filling body can be drawn (as Figure 8 shown, including the stable flow line 7 and the seepage flow line 8). It can be seen from the flow lines that since the upper first annular groove 21 is larger than the lower second annular groove 21, the first annular groove 21 at the lower part of the test block can collect the seepage water 7 in the laminar flow part, and the seepage water in this part is relatively stable, and the obtained test results can be used for theoretical calculation. The collected seepage water flows into the seepage water collection container through the seepage water collection pipeline 41.

[0075] S4. Analysis of the influence of the seepage water quality of the filling body:

[0076] After a certain period of time from the start of the detection, record the detection time t. Take a certain amount of water quality samples from the seepage water collection container and send them to the water quality detection center to test the contents of toxic and harmful substances Kn (n is toxic and harmful substances such as Cd, Ni, Pb, Cr, As, Mn, Zn, etc.) and the pH value and other items in the seepage water quality samples.

[0077] Table 1 is the record form of the seepage water quality detection in Example 1

[0078]

[0079] The detection results are shown in Table 1. Compare the detection data with the limit values specified in the "Groundwater Quality Standard" (GB / T 14848-93) Class III standard: It can be seen from the comparison results that after the groundwater seeps in the mine filling body for a predetermined time t (t = 1, 2, 3, 4, 5..., unit: days), the water quality of its seepage water still meets the requirements of the "Groundwater Quality Standard" (GB / T 14848-93) Class III standard, which has certain practical guiding significance.

[0080] It should be noted that those skilled in the art should understand that the water quality of the seepage water collected by the filling body water quality detection device provided by the present invention can also be used for the detection, analysis and evaluation of other water quality detection items.

[0081] In summary, the present invention provides a filling body water quality detection device and a method for using the same. The filling body water quality detection device includes a mold for making the filling slurry of the filling body into a detection test block of a predetermined size, an external frame for accommodating the detection test block, a groundwater input device provided on the upper part of the external frame, a seepage water collection device provided on the lower part of the external frame, and a fixing device for fixedly connecting the groundwater input device and the seepage water collection device. The method for using this device is as follows: First, take the filling slurry from the blanking port of the mine filling station and pour it into the mold frame to prepare a detection test block; then assemble the groundwater input device, the seepage water collection device, the external frame, the fixing device and the detection test block into a filling water quality detection device; then collect the seepage water of the filling body in a laminar flow state through this device and conduct water quality detection of the seepage water of the filling body; finally, judge the influence of the filling body on the seepage water quality by analyzing the water quality of the collected seepage water. Compared with the traditional method, the method provided by the present invention is closer to the underground environment, and the obtained detection data is more accurate and reliable.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of the present invention.

Claims

1. A filling body water quality detection device for detecting the water quality of a filling body based on the laminar flow state; Characterized in that: The filling body water quality detection device includes a mold (1) for making the filling slurry of the filling body into a detection test block (2) of a predetermined size, an outer frame (5) for placing the detection test block (2), a groundwater input device (3) arranged on the upper part of the outer frame (5), a seepage water collection device (4) arranged on the lower part of the outer frame (5), and a fixing device (6) for fixedly connecting the groundwater input device (3) and the seepage water collection device (4); The groundwater input device (3) includes a groundwater input cover plate (32), a first groove (33) arranged on the groundwater input cover plate (32) with an opening facing the seepage water collection device (4), a groundwater input pipeline (31) with one end connected to the first groove (33), an extension wall (35) protruding from the peripheral wall of the first groove (33) towards the seepage water collection device (4), and a first waterproof rubber ring (34) sleeved on the outer periphery or inner periphery of the extension wall (35); the other end of the groundwater input pipeline (31) is connected to a groundwater input container; The seepage water collection device (4) includes a seepage water collection cover plate (42), a second groove (43) arranged on the seepage water collection cover plate (42), a seepage water collection pipeline (41) with one end connected to the second groove (43), a protruding wall (45) protruding from the peripheral wall of the second groove (43) towards the groundwater input device (3), and a second waterproof rubber ring (44) sleeved on the outer periphery or inner periphery of the protruding wall (45); the other end of the seepage water collection pipeline (41) is connected to a seepage water collection container; The central axes of the first groove (33) and the second groove (43) coincide with each other, and the projected area of the second groove (43) on the first groove (33) is less than or equal to one-half of the projected area of the first groove (33); Both the first groove (33) and the second groove (43) are circular grooves, and the diameter of the second groove (43) is less than or equal to one-half of the diameter of the first groove (33); The length and width dimensions of the groundwater input cover plate (32) are the same as those of the seepage water collection cover plate (42), and the length and width dimensions of both are the same as the length and width dimensions of the inner periphery of the outer frame (5); the first groove (33) is arranged at the middle position of the groundwater input cover plate (32), and the second groove (43) is arranged at the middle position of the seepage water collection cover plate (42).

2. The filling body water quality detection device according to claim 1, Characterized in that: The mold (1) includes a mold frame (11) arranged oppositely and a mold cover plate (12) covering the mold frame (11); a first convex ring (13) is arranged at the middle position of the lower surface of the mold cover plate (12), and a second convex ring (14) is arranged at the middle position of the upper surface of the bottom plate of the mold frame (11); the inner diameter of the first convex ring (13) is the same as the diameter of the first groove (33), and the inner diameter of the second convex ring (14) is the same as the diameter of the second groove (43).

3. The filling body water quality detection device according to claim 1, characterized in that: The outer frame (5) is a rectangular frame with upper and lower openings assembled by steel plates.

4. A method for using the filling body water quality detection device according to any one of claims 1-3, characterized in that: It includes the following steps: S1. Fabricate the test block (2): Provide the mold (1), the mold (1) includes a mold frame (11) arranged oppositely and a mold cover plate (12) covering the mold frame (11); a first convex ring (13) is arranged at the middle position of the lower surface of the mold cover plate (12), and a second convex ring (14) is arranged at the middle position of the upper surface of the bottom plate of the mold frame (11); Take a predetermined volume of filling slurry, pour the filling slurry into the mold frame (11), cover the mold cover plate (12), cure for 28 days according to the concrete curing standard, and then remove the mold frame (11) and the mold cover plate (12) to prepare the test block (2) with the same inner peripheral dimensions as the mold (1); A first annular groove (21) having the same size as the first convex ring (13) is formed on the upper surface of the test block (2), and a second annular groove (22) having the same size as the second convex ring (14) is formed on the lower surface of the test block (2); S2. Assemble the filling body water quality detection device: Place the test block (2) in the outer frame (5), align the first waterproof rubber ring (34) of the groundwater input device (3) with the first annular groove (21) and press it tightly to form a sealed structure; Align the second waterproof rubber ring (44) of the seepage water collection device (4) with the second annular groove (22) and press it tightly to form a sealed structure; Use the fixing device (6) to realize the fixed support and horizontal adjustment of the filling body water quality detection device; Connect the groundwater input pipeline (31) with the groundwater input container, and connect the seepage water collection pipeline (41) with the seepage water collection container; S3. Detection of the quality of seepage water in the test block (2): Collect the groundwater in the mine and inject it into the groundwater input container, and set the pressure of the groundwater to the groundwater pressure in the mined - filled stope of the mine; the groundwater first enters the first groove (33) through the groundwater input pipeline (31), then enters the second groove (43) after passing through the test block (2), and the collected seepage water flows into the seepage water collection container through the seepage water collection pipeline (41), and finally enters the filling body water quality detection device; S4. Influence analysis of the quality of seepage water in the filling body: Record the detection time of collecting the seepage water in step S3, extract a predetermined amount of water quality samples from the seepage water collection container, conduct water quality detection on the water quality samples, and analyze whether the water quality samples meet the standard requirements.

5. The method for using the filling body water quality detection device according to claim 4, characterized in that: The first annular groove (21) and the first waterproof rubber ring (34) are mutually mated; the second annular groove (22) and the second waterproof rubber ring (44) are mutually mated.

6. The method for using the filling body water quality detection device according to claim 4, characterized in that: In step S3, the setting method of the groundwater pressure is: by adjusting the relative height difference between the groundwater input container and the filling body water quality detection device and / or by using a pressure pump to set the pressure of the groundwater to the groundwater pressure in the mined - filled stope of the mine.

7. The method for using the filling body water quality detection device according to claim 4, characterized in that: The water quality detection includes but is not limited to the detection of the content of toxic and harmful substances and the detection of pH value.

8. The method for using the filling body water quality detection device according to claim 4, characterized in that: The inner diameter of the first convex ring (13) is greater than or equal to twice the inner diameter of the second convex ring (14), so as to ensure that the collected seepage water is laminar partial seepage water.

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