Discharging pipe system capable of improving strength homogeneity of underground filling body

Abstract

The invention discloses a blanking pipe system capable of improving the strength homogeneity of an underground filling body, and relates to the technical field of underground paste filling, the blanking pipe system comprises a vertical pipe arranged in a mine, a blanking funnel arranged at the upper end of the vertical pipe, a horizontal pipe arranged under the mine and connected to the lower end of the vertical pipe, and a distributor connected to the other end of the horizontal pipe; the material distributing end of the material distributor is connected with a plurality of material distributing pipes, the material distributing pipes are arranged above an underground filling chamber at intervals, the tail end of each material distributing pipe is connected with a discharging pipe, and the tail end of each discharging pipe is communicated with the interior of the filling chamber; the vertical pipe and the horizontal pipe are both length-adjustable material pipes; valves are arranged on the material distributing pipes and are used for adjusting the number of discharging points; and a filling test block maintenance mold is laid at the bottom of the filling chamber, and the filling test block maintenance mold is used for maintaining and sampling the filling slurry under the condition of different blanking point numbers. The technical problem that an existing underground paste filling body is uneven in strength is solved.

Description

Technical Field

[0001] The invention relates to the technical field of underground paste filling, in particular to a feeding pipe system capable of improving the strength homogeneity of underground filling bodies. Background Art

[0002] Paste filling technology has the function of "one waste cures two harms", and is an important measure to implement the national "green mining" concept. It has the advantages of environmental protection, safety, and high efficiency, and is the main direction of future mining production development. The strength homogeneity of underground filling bodies not only has an important impact on underground safe mining production, but also directly affects the depletion rate of ore in the second step. To this end, ensuring the strength homogeneity of the filling body is the key to achieving underground safety production and improving the economic benefits of mining. In order to explore the impact of the layout of underground filling feed pipes and the changes in the number of feed pipes on the homogeneity of filling body strength during the filling production process, as well as the reasons for the inhomogeneity of filling body strength, it is preferred to carry out small-scale filling strength homogeneity experiments indoors to provide theoretical knowledge and on-site guidance for engineering problems.

[0003] The existing underground filling pipe layout is often based on a specific parameter design, which has the following problems:

[0004] 1. The feeding pipe is directly connected to the horizontal pipe without a distributor in the middle, that is, the number of feeding pipes is fixed and cannot be flexibly adjusted according to actual production. It is difficult to find out the change of filling body strength homogeneity with the number of feeding points, which has certain shortcomings.

[0005] 2. In the past, when investigating the strength of underground filling bodies, core sampling was often used. Due to the limitations of instrument and equipment use conditions, the number of filling body samples taken was limited, and the changes in filling body strength at different locations could not be accurately reflected.

[0006] 3. In the past, when studying the strength of underground filling bodies, more consideration was given to the influence of filling slurry concentration and ash-sand ratio on the filling body strength, without considering the influence of changes in the length of horizontal pipes and distribution pipes and the number of feeding points on the homogeneity of filling body strength.

[0007] 4. In the past, when the strength homogeneity of underground filling bodies was studied, the reasons for the uneven strength of the filling bodies were not deeply explored. Summary of the invention

[0008] In order to solve the technical problem of uneven strength of existing underground paste filling bodies, the embodiment of the present invention provides a feeding pipe system that can improve the strength homogeneity of underground filling bodies. The technical solution is as follows:

[0009] On the one hand, a feeding pipe system is provided for improving the strength homogeneity of underground filling bodies, comprising a vertical pipe arranged in a mine, a feeding funnel being arranged at the upper end of the vertical pipe, the lower end of the vertical pipe being connected to a horizontal pipe arranged underground, the other end of the horizontal pipe being connected to a distributor, the distribution end of the distributor being connected to a plurality of distribution pipes, the plurality of distribution pipes being arranged at intervals above the filling chamber underground, the end of each distribution pipe being connected to a feeding pipe, the ends of the feeding pipes being connected to the interior of the filling chamber; the vertical pipe and the horizontal pipe are both length-adjustable pipes; a valve is arranged on the distribution pipe, the valve being used to adjust the number of feeding points; a filling test block curing mold is laid at the bottom of the filling chamber, the filling test block curing mold being used to cure and sample the filling slurry under the conditions of different numbers of feeding points.

[0010] Optionally, the vertical pipe and the horizontal pipe are connected via an elbow joint; the material distribution pipe and the material discharge pipe are connected via a material discharge elbow.

[0011] Optionally, the ends of the discharge funnel, the vertical pipe, the elbow joint, the horizontal pipe, the distributor, the distribution pipe, and the discharge elbow are all provided with connecting ends; wherein, the corresponding two connecting ends on the discharge funnel, the vertical pipe, the elbow joint, the horizontal pipe, the distributor, and the distribution pipe are connected and fixed by a bolt structure.

[0012] Optionally, a sealing ring is provided between two connection ends fixed by a bolt structure.

[0013] Optionally, the discharge elbow and the corresponding two connection ends of the discharge pipe are connected and fixed by a clamp.

[0014] Optionally, a support frame is further included; the distribution pipe is fixed above the filling chamber through the support frame.

[0015] Optionally, the material distribution pipe is fixed to the support frame by using a cable tie.

[0016] Optionally, adjacent material distribution pipes are arranged at equal intervals at preset intervals above the filling chamber underground.

[0017] Optionally, the end of each feeding pipe corresponds to a feeding point; the preset interval calculation formula includes:

[0018] D 1 =L / 2N

[0019] D 2 =L / N

[0020] Where D 1 D is the shortest distance between the feed pipe and the edge of the filling chamber, 2is the preset interval, and N is the number of unloading points.

[0021] The embodiment of the present invention provides a feed pipe system that can improve the strength homogeneity of underground filling bodies. It can not only obtain the change in the strength homogeneity of the filling body in the filling chamber, but also realize the dynamic adjustment of the number of feed pipes during the underground filling process. From the perspective of the change in the number of feed pipes, the changes in the filling slurry concentration and coarse particle content in the filling chamber can be explored, and then the reasons affecting the strength homogeneity of the filling body are revealed, thereby alleviating the technical problem of uneven strength of existing underground paste filling bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 Schematic diagram of a feed pipe system for improving the strength homogeneity of underground filling bodies provided by an embodiment of the present invention;

[0024] Figure 2 It is a structural diagram of a bolt structure sealing ring provided in an embodiment of the present invention.

[0025] Description of reference numerals:

[0026] 1. Feeding funnel, 2. Lower end of feeding funnel, 3. Upper end of vertical pipe, 4. Bolt structure, 5. Vertical pipe, 6. Upper end of elbow joint, 7. Lower end of vertical pipe, 8. Elbow joint, 9. Lower end of elbow joint, 10. One end of horizontal pipe, 11. Horizontal pipe, 12. The other end of horizontal pipe, 13. One end of distributor, 14. Distributor, 15 Distributor end of distributor, 16. One end of distributor pipe, 17 distributor pipe, 18. The other end of distributor pipe, 19. Upper end of feeding elbow, 20. Feeding elbow, 21. Lower end of feeding elbow, 22. Upper end of feeding pipe, 23. Feeding pipe, 24. Valve, 25. Cable tie, 26. Clamp, 27. Filling room, 28. Filling slurry, 29. Support frame, 30. Filling test block curing mold, 31 sealing ring. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is described below in conjunction with the accompanying drawings.

[0028] In the embodiments of the present invention, words such as "exemplarily" and "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "example" in the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the word "example" is intended to present the concept in a specific way. In addition, in the embodiments of the present invention, the meaning expressed by "and / or" can be both, or it can be either of the two.

[0029] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0030] Figure 1 Schematic diagram of a feed pipe system for improving the strength homogeneity of underground filling bodies according to an embodiment of the present invention. Figure 1 As shown, it includes a vertical pipe 5 arranged in a mine, a discharge funnel 1 is arranged at the upper end of the vertical pipe 5, the lower end of the vertical pipe 5 is connected to a horizontal pipe 11 arranged underground, the other end of the horizontal pipe 11 is connected to a distributor 14, the distribution end of the distributor 14 is connected to a plurality of distribution pipes 17, and the plurality of distribution pipes 17 are arranged at intervals above the filling chamber 27 underground, and the end of each distribution pipe 17 is connected to a discharge pipe 23, and the end of the discharge pipe 23 is connected to the inside of the filling chamber 27.

[0031] In the embodiment of the present invention, both the vertical tube 5 and the horizontal tube 11 are length-adjustable material tubes. The height of the vertical tube 5 can be adjusted by increasing or decreasing the tube length, and the vertical tubes 5 are connected by bolt structures 4; the length of the horizontal tube 11 can be adjusted by increasing or decreasing the tube length, and the horizontal tubes 11 are connected by bolt structures 4.

[0032] Specifically, the distributor 14 is used to centrally store the filling slurry.

[0033] A valve 24 is provided on the material distribution pipe 17, and the valve 24 is used to adjust the number of material discharge points; by closing or opening the valve 24, the material discharge of the material discharge pipe 23 can be controlled, thereby adjusting the number of material discharge points.

[0034] Specifically, the filling chamber 27 is used to fill the filling slurry, and the size of the filling chamber 27 can be scaled according to the actual size of the mine.

[0035] A filling block curing mold 30 is laid at the bottom of the filling chamber 27. The filling block curing mold 30 is used to cure and sample the filling slurry under different feeding point quantity conditions. Specifically, the filling block curing mold 30 is used to collect filling slurry concentration, coarse particle content and filling block strength data at different points in the filling chamber 27.

[0036] In an optional implementation provided in the embodiment of the present invention, the size of the filling block curing mold 30 is 70mm 70mm 70mm, the filling block curing mold 30 is laid perpendicular to the length direction of the filling chamber 27, and is laid in groups of four.

[0037] Specifically, in each group of filling test block curing molds 30, the filling slurry in one filling test block curing mold 30 is used to analyze the filling slurry concentration and coarse particle content, and the filling slurries in the remaining three filling test block curing molds 30 of the group are used to test the filling body strength with curing cycles of 3d, 7d, and 28d, respectively.

[0038] Specifically, in order to achieve connection between different structures, the vertical pipe 5 and the horizontal pipe 11 are connected via an elbow joint 8 ; the distribution pipe 17 and the discharge pipe 23 are connected via a discharge elbow 20 .

[0039] The material discharge pipe 23 is vertically arranged to the material distribution pipe 17 , and the material discharge direction is changed by the material discharge elbow 20 .

[0040] Specifically, the ends of the discharge funnel 1, the vertical pipe 5, the elbow joint 8, the horizontal pipe 11, the distributor 14, the distribution pipe 17, and the discharge elbow 20 are all provided with connection ends; wherein,

[0041] The discharge funnel 1 , the vertical pipe 5 , the elbow joint 8 , the horizontal pipe 11 , the distributor 14 and two corresponding connection ends on the distribution pipe 17 are connected and fixed by a bolt structure 4 .

[0042] Specifically, in order to prevent the slurry from seeping out through the connection ends between different pipes during the feeding process, the connection ends of the feeding hopper 1, the vertical pipe 5, the elbow pipe 8, the horizontal pipe 11, the distributor 14 and the distribution pipe 17 are provided as follows: Figure 2 The rubber sealing ring 31 is shown to prevent the filling slurry from leaking out.

[0043] Specifically, Figure 1 As shown, the corresponding two connection ends of the discharge elbow 20 and the discharge pipe 23 are connected and fixed by a clamp 26.

[0044] Specifically, Figure 1 As shown, it also includes a support frame 29; the distribution pipe 17 is fixed above the filling chamber 27 through the support frame 29.

[0045] Preferably, the material distribution pipe 17 is fixed to the support frame 29 by using a cable tie 25 .

[0046] In the embodiment of the present invention, the lengths of the feed pipes 23 are the same, and adjacent feed pipes 17 are arranged above the filling chamber 27 underground at equal intervals at preset intervals.

[0047] Specifically, the end of each feeding pipe corresponds to a feeding point; the preset interval calculation formula includes:

[0048] D 1 =L / 2N

[0049] D 2 =L / N

[0050] Where D 1 D is the shortest distance between the feeding pipe and the edge of the filling chamber. 2 is the preset interval, and N is the number of unloading points.

[0051] like Figure 1 As shown, an arrangement method of a feed pipe system for improving the strength homogeneity of underground filling bodies provided by an embodiment of the present invention is as follows:

[0052] 1) The lower end 2 of the discharge hopper is first connected to the upper end 3 of the vertical pipe through the bolt structure 4 and the sealing ring 31, and the lower end 7 of the vertical pipe is connected to the upper end 6 of the elbow joint in the same way to complete the assembly of the upper part of the discharge pipe arrangement.

[0053] 2) One end 10 of the horizontal pipe is connected to the lower end 9 of the elbow joint through the bolt structure 4 and the sealing ring 31, and the other end 12 of the horizontal pipe is connected to one end 16 of the distributor in the same way, completing the assembly of the middle part of the feed pipe arrangement.

[0054] 3) One end 13 of the distributor is connected to the other end 12 of the horizontal pipe through a bolt structure 4 and a sealing ring 31. The distributor end 15 is connected to one end 16 of the distributor pipe in the same manner. The upper end 19 of the discharge elbow is connected to the other end 18 of the discharge pipe through a clamp 26. The upper end 22 of the discharge pipe is connected to the lower end 21 of the discharge elbow in the same manner. At the same time, the distribution pipe 17 is fixed to the support frame 29 in the upper center of the filling chamber 27 by a cable tie 25, completing the assembly of the lower half of the discharge pipe arrangement.

[0055] 4) The filling slurry 28 enters the vertical pipe 5 through the discharge funnel 1, and enters the horizontal pipe 11 through the elbow joint 8. The filling slurry enters the distributor 14 through the horizontal pipe 11, and is diverted to the distribution pipe 17 through the distribution pipe distribution end 15. The flow direction of the filling slurry 28 is changed through the discharge elbow 20, and finally the filling slurry is transported to the filling chamber 27 through the discharge pipe 23. A filling test block curing mold 30 is laid at the bottom of the filling chamber 27. After the filling is completed, the filling test block curing mold 30 can be taken out, and further experimental analysis is performed on the filling slurry concentration, coarse particle content and filling body strength with curing cycles of 3d, 7d and 28d in the filling test block curing mold 30.

[0056] 5) The lengths of the vertical tube 5 and the horizontal tube 11 can be adjusted according to the experimental requirements, thereby changing the filling multiple to meet different experimental requirements. The homogeneity requirements of the filling body strength can be achieved by controlling the valve 24 on the material distribution pipe 17 and adjusting the number of the material discharge pipes 23.

[0057] From the above description, it can be seen that the present invention provides a feeding pipe system that can improve the strength homogeneity of the underground filling body, which can not only obtain the change of the strength homogeneity of the filling body in the filling chamber, but also realize the dynamic adjustment of the number of feeding pipes during the underground filling process, and explore the changes in the concentration and coarse particle content of the filling slurry in the filling chamber from the perspective of the change in the number of feeding pipes, and then reveal the reasons affecting the strength homogeneity of the filling body. Among them, the filling test block curing mold is laid at the bottom of the filling chamber, which adds convenience to the operation of the experiment, and is convenient for sampling and analysis of the filling slurry in the filling chamber after the experiment, so as to further explore the changes in the concentration, coarse particle content and filling body strength of the filling slurry in the filling chamber. At the same time, the lengths of the feed pipes and the feeding pipes at different feeding points are the same, and the number of feeding pipes can be dynamically adjusted through the valves on the feed pipes, thereby realizing the structural layout of the homogeneity of the filling slurry at different positions in the filling chamber, thereby meeting the requirements of the homogeneity of the strength of the filling body, and providing a strong guarantee for the subsequent links of paste filling.

[0058] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A feeding pipe system capable of improving the strength homogeneity of underground filling body, characterized in that: It comprises a vertical pipe arranged in a mine, a material discharge funnel is arranged at the upper end of the vertical pipe, the lower end of the vertical pipe is connected to a horizontal pipe arranged underground, the other end of the horizontal pipe is connected to a material distributor, the material distribution end of the material distributor is connected to a plurality of material distribution pipes, the plurality of material distribution pipes are arranged above the filling chamber underground at intervals, the end of each material distribution pipe is connected to a material discharge pipe, and the end of the material discharge pipe is connected to the inside of the filling chamber; The vertical tube and the horizontal tube are both length-adjustable material tubes; A valve is provided on the material distribution pipe, and the valve is used to adjust the number of material discharge points; A filling test block curing mold is laid at the bottom of the filling chamber, and the filling test block curing mold is used to cure and sample the filling slurry under the conditions of different numbers of feeding points.

2. The feed pipe system capable of improving the strength homogeneity of underground filling body according to claim 1, characterized in that: The vertical pipe is connected to the horizontal pipe via an elbow joint; the material distribution pipe is connected to the material discharge pipe via a material discharge elbow.

3. The feed pipe system capable of improving the strength homogeneity of underground filling body according to claim 2, characterized in that: The ends of the discharge funnel, the vertical pipe, the elbow joint, the horizontal pipe, the distributor, the distribution pipe, and the discharge elbow are all provided with connection ends; wherein, The discharge funnel, the vertical pipe, the elbow joint, the horizontal pipe, the distributor and two corresponding connecting ends on the distribution pipe are connected and fixed by a bolt structure.

4. The feed pipe system capable of improving the strength homogeneity of underground filling body according to claim 3 is characterized in that: A sealing ring is arranged between the two connection ends fixed by the bolt structure.

5. The feed pipe system capable of improving the strength homogeneity of underground filling body according to claim 3, characterized in that: The discharge elbow and the corresponding two connection ends of the discharge pipe are connected and fixed by a clamp.

6. The feed pipe system capable of improving the strength homogeneity of underground filling body according to claim 1, characterized in that: It also includes a support frame; the material distribution pipe is fixed above the filling chamber through the support frame.

7. The feed pipe system capable of improving the strength homogeneity of underground filling body according to claim 6, characterized in that: The material distribution pipe is fixed on the support frame by using a cable tie.

8. The feed pipe system capable of improving the strength homogeneity of underground filling body according to claim 1, characterized in that: Adjacent material distribution pipes are arranged at equal intervals at preset intervals above the filling chamber underground.

9. The feed pipe system capable of improving the strength homogeneity of underground filling body according to claim 8, characterized in that: The end of each feeding pipe corresponds to a feeding point; the preset interval calculation formula includes: D1=L / 2N D2=L / N Wherein, D1 is the shortest distance between the feeding pipe and the edge of the filling chamber, D2 is the preset interval, and N is the number of feeding points.

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