CN114233381A - Ore deposit filling device and ore deposit filling method - Google Patents
Ore deposit filling device and ore deposit filling method Download PDFInfo
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- CN114233381A CN114233381A CN202111445159.0A CN202111445159A CN114233381A CN 114233381 A CN114233381 A CN 114233381A CN 202111445159 A CN202111445159 A CN 202111445159A CN 114233381 A CN114233381 A CN 114233381A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000002002 slurry Substances 0.000 claims abstract description 200
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 33
- 239000011707 mineral Substances 0.000 claims abstract description 33
- VNFVKWMKVDOSKT-LREBCSMRSA-N (2r,3r)-2,3-dihydroxybutanedioic acid;piperazine Chemical compound C1CNCCN1.OC(=O)[C@H](O)[C@@H](O)C(O)=O VNFVKWMKVDOSKT-LREBCSMRSA-N 0.000 claims description 9
- 239000003638 chemical reducing agent Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 8
- 239000004568 cement Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000003068 static effect Effects 0.000 abstract description 25
- 238000012856 packing Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 description 8
- 239000000945 filler Substances 0.000 description 7
- 238000005553 drilling Methods 0.000 description 5
- 230000002706 hydrostatic effect Effects 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 244000261422 Lysimachia clethroides Species 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009172 bursting Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000002716 delivery method Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
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- 230000036961 partial effect Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/08—Filling-up hydraulically or pneumatically
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Abstract
The application relates to the technical field of slurry filling, and provides an ore deposit filling device and an ore deposit filling method, which comprise the following steps: an ore deposit-filling slurry conduit having one end serving as an inlet for ore deposit-filling slurry; one end of the vertical pipe extends into the mineral deposit to be filled, and the other end of the vertical pipe is connected with the other end of the mineral deposit filling slurry conduit; wherein the inner diameter of the deposit filling slurry guide is larger than or equal to the inner diameter of the vertical pipe. The application provides a deposit filling device can dissipate the surplus static head that deposit packing slurry pipe and vertical pipe produced through the internal diameter that sets up deposit packing slurry pipe is greater than the internal diameter of vertical pipe, and wherein, the internal diameter of deposit packing slurry pipe is greater than the internal diameter of vertical pipe to increase deposit packing slurry and pass through the frictional resistance of this part, just can obtain the full flow conveying system of low pressure.
Description
Technical Field
The application belongs to the technical field of ore deposit filling, and particularly relates to an ore deposit filling device and an ore deposit filling method.
Background
Under the normal condition, the fine sand cemented filling slurry is conveyed to a goaf to be filled underground for filling in an economic, environment-friendly and stable pipeline conveying mode. The slurry pipeline conveying system is generally composed of a vertical pipe (a drilling hole or a pipeline), a horizontal pipe, various elbows, reducer pipes, joints and a tee joint. After the filling slurry enters the pipeline system, the automatic operation state is entered, and manual intervention cannot be performed. Thus, the piping system is the most problematic (pipe plugging) system and must be highly valued to ensure that the fill slurry is smoothly transported through the piping system to the downhole area to be filled.
In addition, free fall delivery systems pose a number of hazards to the stable operation of fill pipe delivery systems. Therefore, it should be avoided as much as possible in production practice, especially deep well filling practice. The method comprises the following specific steps:
(1) in the free falling area, the final speed of the mortar is very high, possibly reaching 50m/s or higher, the mortar flowing at high speed migrates and washes towards the pipe wall, so that the high-speed abrasion of the pipeline is caused, and if the vertical pipe section is inclined, the local abrasion of the pipeline is more serious;
(2) the impact pressure of the slurry generated by the collision between the air and the mortar interface is huge, the huge impact force can cause the rupture of a pipeline, and the best method for reducing the impact force is to shorten the impact force to eliminate the free falling area of the slurry, so that the maximum free falling speed of the slurry can be reduced, and the occurrence of huge impulse is avoided;
(3) because in the vertical pipe section, the slurry has a free fall area, the residual potential energy formed by natural fall can make the slurry naturally accelerate in the pipeline, great pressure is generated at the junction of the vertical pipe and the horizontal pipe, the formed negative pressure makes the slurry become discontinuous flow, so that vacuum closing water hammer is formed, repeated vacuum action forms cavitation erosion, meanwhile, because the flow direction of the partial slurry is suddenly changed, the normal impact force of the slurry on the pipe wall is very large, the local abrasion of the pipeline is accelerated, and the phenomenon of perforation of the pipe wall is very serious.
Disclosure of Invention
The application aims to provide an ore deposit filling device and an ore deposit filling method, and aims to solve the technical problem that the full pipe rate of pipeline transportation is improved in the prior art.
In order to achieve the purpose of the application, the technical scheme adopted by the application is as follows:
in a first aspect, the present application provides an ore deposit filling apparatus comprising:
an ore deposit-filling slurry conduit having one end serving as an inlet for ore deposit-filling slurry;
one end of the vertical pipe extends into the mineral deposit to be filled, and the other end of the vertical pipe is connected with the other end of the mineral deposit filling slurry conduit;
wherein the inner diameter of the ore bed filling slurry guide is larger than that of the vertical pipe.
The application provides a deposit filling device can dissipate the surplus static head that deposit filling slurry pipe and vertical pipe produced through setting up the inside diameter ratio of deposit filling slurry pipe and being greater than the inside diameter of vertical pipe, and wherein the inside diameter ratio of deposit filling slurry pipe is greater than the inside diameter of vertical pipe to increase deposit filling slurry and pass through the frictional resistance of this part, just can obtain the full flow conveying system of low pressure.
In a second aspect, the present application provides a method of mineral deposit filling comprising the steps of:
preparing a filling material;
transport the deposit filling slurry with above-mentioned this application deposit filling device.
According to the ore deposit filling method, on one hand, the ore deposit filling slurry is prepared, and the fluidity of the ore deposit filling slurry can be ensured, so that the ore deposit filling slurry can be transported in a pipeline, and further the pipeline cannot be blocked.
Drawings
Fig. 1 is an ore deposit filling apparatus provided in an embodiment of the present invention;
fig. 2 is a flow chart of a method of filling an ore deposit provided in an embodiment of the present invention.
Reference numerals
1-bed packing slurry conduit; 11-a first bend; 12-a first slurry conduit; 13-a second slurry conduit; 2-a vertical pipe; 3-a transverse tube; 4-a reducer; 5-a second bend; 6-gooseneck; 7-a storage tank; 8-air compressing and stirring device.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application more clearly apparent, the present application is further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In this application, the term "and/or" describes an association relationship of associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a is present alone, A and B are present simultaneously, and B is present alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
In the present application, "at least one" means one or more, "a plurality" means two or more. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, "at least one (a), b, or c", or "at least one (a), b, and c", may each represent: a, b, c, a-b (i.e., a and b), a-c, b-c, or a-b-c, wherein a, b, and c may be single or plural, respectively.
It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, some or all of the steps may be executed in parallel or executed sequentially, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The weight of the related components mentioned in the description of the embodiments of the present application may not only refer to the specific weight of each component, but also represent the proportional relationship of the weight among the components, and therefore, the enlargement or reduction of the weight of the related components according to the description of the embodiments of the present application is within the scope disclosed in the description of the embodiments of the present application. Specifically, the mass described in the specification of the embodiments of the present application may be a mass unit known in the chemical industry field such as μ g, mg, g, kg, etc.
The terms "first" and "second" are used for descriptive purposes only and are used for distinguishing purposes such as substances from one another, and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. For example, a first XX may also be referred to as a second XX, and similarly, a second XX may also be referred to as a first XX, without departing from the scope of embodiments of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In a first aspect, an embodiment of the present application provides an ore deposit filling apparatus, as shown in fig. 1, including:
a deposit-filling slurry conduit 1, one end of which is an inlet end of the deposit-filling slurry;
one end of the vertical pipe 2 extends into the mineral deposit to be filled, and the other end is connected with the other end of the mineral deposit filling slurry conduit;
wherein the inner diameter of the deposit-packed slurry conduit 1 is larger than the inner diameter of the vertical pipe 2.
The deposit filling device provided by the embodiment of the application can dissipate residual static head generated by the deposit filling slurry guide pipe 1 and the vertical pipe 2, and particularly, a low-pressure full-flow conveying system can be obtained by setting the inner diameter of the deposit filling slurry guide pipe 1 to be larger than that of the vertical pipe 2 so as to increase the frictional resistance of slurry passing through the part.
The hydrostatic head refers to the hydrostatic energy of the bed-filling slurry per unit weight in the pipe, and for general fluids, the hydrostatic head is given by a pump or generated by difference in elevation.
In the embodiment, in the specific use process, one end part of the mineral deposit filling slurry conduit 1 connected with the vertical pipe is arranged below the ground surface through a drilling hole, the mineral deposit filling slurry conduit 1 extends from the ground surface to the ground surface, the mineral deposit filling slurry is transported into the vertical pipe 2 through the mineral deposit filling slurry conduit 1, static pressure head is generated in the transportation process, and the static pressure head generated by the filling slurry in the vertical pipe 2 is enough to overcome the friction loss of the two different pipe diameters, so that the slurry can flow at a certain stable flow rate. For a given flow rate Q, a small diameter tube or long pipe will give a steeper system curve, thus requiring a higher static head to be provided on the vertical tube 2, thereby creating a higher pressure; the bed-filling slurry conduit 1 will form a more gradual system curve and therefore provide a lower static head in the riser 2 sufficient to overcome the resistance and thus create a lower pressure. As the flow rate in the vertical tubes 2 increases progressively, the head of pressure consumed in the vertical tubes 2 also increases progressively, resulting in a progressively decreasing static head being distributed to the ends of the vertical tubes 2. If the flow velocity is continuously increased, the static pressure head generated by the vertical pipe 2 is completely consumed by the friction resistance of the pipeline in the part, the flow velocity is the limit flow velocity, and the smaller the diameter of the vertical pipe 2 is, the lower the flow velocity reaching the limit flow velocity is, and the larger the flow velocity is.
In some embodiments, one end of the riser 2 is connected to the other end of the bed-filling slurry conduit 1 by a reducer 4 as in fig. 1. Wherein, the reducing pipe 4 is a reducing pipe, the small inner diameter end of the reducing pipe is connected with one end of the vertical pipe 2, and the large inner diameter end of the reducing pipe is connected with the other end of the ore deposit filling slurry conduit 1. The setting of this reducing pipe 4 can improve the leakproofness of being connected between vertical pipe 2 and the deposit slurry filling pipe 1, and when deposit slurry filling flows through reducing pipe 4, because the effect of reducing, the static pressure head of deposit slurry filling can slowly reduce, gives a transition process of the dissipation of static pressure head, makes deposit slurry filling reduce to the minimum from deposit slurry filling pipe 1 to the torrent phenomenon of vertical pipe 2 changeover portion.
In some embodiments, the deposit filling slurry conduit 1 further comprises a first slurry conduit 12, a first elbow 11 and a second slurry conduit 13, and the first slurry conduit 12, the first elbow 11 and the second slurry conduit 13 are connected in sequence, wherein one end of the second slurry conduit 13 is connected with the vertical pipe 2, and the other end of the first slurry conduit 12 connected with the first elbow 11 is an inlet end of the deposit filling slurry. The vertical connection of the first slurry conduit 12 and the second slurry conduit 13 can be realized by arranging the first elbow 11 and the second slurry conduit 13 so as to meet the requirements of practical application, and the ore deposit filling slurry can be remotely conveyed. In some embodiments, the inner diameter of the second slurry conduit 13 is equal to the inner diameter of the first slurry conduit 12 to reduce the transport resistance of the deposit-filling slurry in transit through the first elbow 11.
In some embodiments, the deposit filling apparatus of the present application further comprises a transverse pipe 3, the transverse pipe 3 being disposed deep in the deposit and having one end connected to the other end of the vertical pipe 2 opposite to the end connected to the deposit filling slurry conduit 1, the other end of the transverse pipe 3 extending deep in the deposit and serving as a final discharge port for the deposit filling slurry. The transverse pipe 3 can be arranged to extend to a target area and reduce the occurrence of guniting.
In some embodiments, the transverse pipe 3 and the vertical pipe 2 are connected by the second elbow 4 and the gooseneck 6, and the vertical pipe 2, the second elbow 4, the gooseneck 6 and the transverse pipe 3 are sequentially connected according to the filling flow direction of the ore deposit filling slurry, so as to improve the impact resistance of the system.
In some embodiments, the deposit filling apparatus of the present embodiment further includes a storage tank 7, and the storage tank 7 is disposed on the ground surface of the inlet end of the deposit filling slurry conduit 1 and is connected to the inlet end of the deposit filling slurry conduit 1. The main purpose of providing the storage tank 7 on the ground surface is to supply the bed-filling slurry to the bed-filling slurry conduit 1, to ensure the full pipe flow condition in the vertical pipe 2, to make the flow rate of the bed-filling slurry to be delivered offset the frictional loss in the pipe, and to prevent the pipe blockage phenomenon caused by the insufficient static head of the vertical pipe 2.
In the embodiment, the inside agitating unit 8 that calms the anger that is provided with of stock chest 7, agitating unit 8 that calms the anger can be to the mineral deposit slurry filling line stirring processing, and produces the pressure of transmission to the mineral deposit slurry filling, makes the mineral deposit slurry filling have certain velocity of flow and then can transport in the mineral deposit slurry filling pipe 1. In the embodiment of the present application, the storage tank 7 provided at the inlet, the storage tank 7 of all installed filling slurry supply devices should be located as high as possible (the static head can be generated is large) and should be close to the vertical pipe 2 (drilling) to optimize the feeding conditions, and the compressed air stirring device 7 is provided inside the storage tank 7, so that the available static head of the filling slurry in the storage tank is utilized to the maximum extent, and the friction loss between the storage tank 7 and the pipe section of the vertical pipe 2 is minimized. This ensures positive pressure of the filler slurry in the vertical pipe, that is, excessive supply of the filler slurry to the vertical pipe 2 (or the drilled hole).
A second aspect of the embodiments of the present application provides a method for filling an ore deposit, and with reference to fig. 1, a process flow of the method for filling an ore deposit according to the embodiments of the present application is shown in fig. 2, and includes the following steps:
step S1: preparing ore deposit filling slurry;
step S2: the ore deposit filling device is used for transporting the ore deposit filling slurry.
The method for preparing the mineral deposit filling slurry firstly provided by the embodiment of the application can ensure the fluidity of the mineral deposit filling slurry, so that the mineral deposit filling slurry can be transported in a pipeline, and further the pipeline cannot be blocked.
In step S1, the bed filling slurry having a slump value of more than 25cm is prepared, so that the fluidity of the bed filling slurry can be further ensured.
In some embodiments, the mass ratio of the cement to the tailings is 1: 3-0: 1, mixing to obtain a filling material, and treating the filling material and water according to a mass ratio of 64: 32-76: 24 to obtain the ore deposit filling slurry. In some embodiments, the cement and the tailings can be mixed according to the mass ratio of 1:3, 1:4, 1:8, 1:4, 1:10 and 0:1, so that the fluidity of the ore deposit filling slurry can be improved, and the filling material has good slump.
In some embodiments, the tailings comprise at least one of graded tailings and fine tailings, and a use way is provided for the use of the graded tailings and the fine tailings. In some embodiments, the weight ratio of particles with the particle size of less than 21 μm in the classification tailings is more than 15.91%, and the paste performance of the ore bed filling slurry is improved. In some embodiments, the weight ratio of particles with the particle size of less than 21 μm in the fine tailings is greater than 62.51%, and the paste performance of the ore bed filling slurry is improved.
In step S2, the bed filling slurry is transported by the bed filling apparatus according to the embodiment of the present application.
In some embodiments, when the inner diameter of the second conduit is no greater than 88mm, the deposit fill slurry is transported using a self-flowing delivery method and the full rate of the horizontal tubes increases by no less than 60%. In some embodiments, the difference in elevation between the inlet elevation of the deposit-filling slurry conduit and the outlet elevation of the second conduit is 196 to 721m, and the hydrostatic head between the large diameter transport conduit and the deposit-filling slurry conduit can be adjusted.
Furthermore, the filling multiple line of the pipeline conveying system is 1.28-3.61, and in the filling multiple line range provided by the embodiment of the application, the ore deposit filling slurry with the slump larger than 25cm can be transported in a self-flowing mode (without additionally increasing new pressure).
In some embodiments, when the inner diameter of the second conduit is not less than 154mm, the bed packing slurry is transported by a pressurized transport method, and the full rate of the horizontal tubes is increased by not less than 80%.
The following description will be given with reference to specific examples.
Example 1
Fig. 1 provides an ore deposit filling apparatus comprising: the first aspect of the embodiments of the present application provides an ore deposit filling device, specifically, including: one end of the ore deposit filling slurry guide pipe 1 is used as an inlet of ore deposit filling slurry, the vertical pipe 2 has one end extending into an ore deposit to be filled, and the other end connected with the other end of the ore deposit filling slurry guide pipe, wherein the inner diameter of the ore deposit filling slurry guide pipe 1 is larger than or equal to the inner diameter of the vertical pipe 2.
In a specific use process, one end part of the ore deposit filling slurry guide pipe 1 connected with the vertical pipe 2 is arranged below the ground surface through a drilling hole, the ore deposit filling slurry guide pipe 1 extends from the ground surface to the ground surface, ore deposit filling slurry is transported into the vertical pipe 2 through the ore deposit filling slurry guide pipe 1, static pressure head is generated in the transportation process, and the static pressure head generated by the filling slurry in the vertical pipe 2 is enough to overcome the friction loss of the two different pipe diameters, so that the slurry can flow at a certain stable flow speed. For a given flow rate Q, a small diameter tube or long pipe will give a steeper system curve, thus requiring a higher static head to be provided on the vertical tube 2, thereby creating a higher pressure; the bed-filling slurry conduit 1 will form a more gradual system curve and therefore provide a lower static head in the riser 2 sufficient to overcome the resistance and thus create a lower pressure. As the flow rate in the vertical tubes 2 increases progressively, the head of pressure consumed in the vertical tubes 2 also increases progressively, resulting in a progressively decreasing static head being distributed to the ends of the vertical tubes 2. If the flow velocity is continuously increased, the static pressure head generated by the vertical pipe 2 is completely consumed by the friction resistance of the pipeline in the part, the flow velocity is the limit flow velocity, and the smaller the diameter of the vertical pipe 2 is, the lower the flow velocity reaching the limit flow velocity is, and the larger the flow velocity is.
One end of the vertical pipe 2 is connected to the other end of the deposit-filling slurry guide pipe 1 by a reducer 4 as shown in fig. 1. Wherein, the reducing pipe 4 is a reducing pipe, the small inner diameter end of the reducing pipe is connected with one end of the vertical pipe 2, and the large inner diameter end of the reducing pipe is connected with the other end of the ore deposit filling slurry conduit 1. The setting of this reducing pipe 4 can improve the leakproofness of being connected between vertical pipe 2 and the deposit slurry filling pipe 1, and when deposit slurry filling flows through reducing pipe 4, because the effect of reducing, the static pressure head of deposit slurry filling can slowly reduce, gives a transition process of the dissipation of static pressure head, makes deposit slurry filling reduce to the minimum from deposit slurry filling pipe to the torrent phenomenon of vertical pipe changeover portion.
The mineral deposit filling slurry conduit 1 further comprises a first slurry conduit 12, a first bent pipe 11 and a second slurry conduit 13, wherein the first slurry conduit 12, the first bent pipe 11 and the second slurry conduit 13 are sequentially connected, one end of the second slurry conduit 13 is connected with the vertical pipe 2, and the other end of the first slurry conduit 12, which is connected with the first bent pipe 11, is an inlet end of mineral deposit filling slurry. The vertical connection of the first slurry conduit 12 and the second slurry conduit 13 can be realized by arranging the first elbow 11 and the second slurry conduit 13 so as to meet the requirements of practical application, and the ore deposit filling slurry can be remotely conveyed. In some embodiments, the inner diameter of the second slurry conduit 13 is equal to the inner diameter of the first slurry conduit 12 to reduce the transport resistance of the deposit-filling slurry in transit through the first elbow 11.
The deposit filling device further comprises a transverse pipe 3, the transverse pipe 3 is arranged in the deep part of the deposit, one end of the transverse pipe 3 is connected with the other end, opposite to the connecting end of the deposit filling slurry guide pipe 1, of the vertical pipe 2, and the other end of the transverse pipe 3 extends to the deep part of the deposit and is used as a final discharge port of the deposit filling slurry. The transverse pipe 3 can be arranged to extend to a target area and reduce the occurrence of guniting.
Wherein, the deposit filling device also comprises a storage tank 7, and the storage tank 7 is arranged on the ground surface of the inlet end of the deposit filling slurry guide pipe 1 and is connected with the inlet end of the deposit filling slurry guide pipe 1. The main purpose of providing the storage tank 7 on the ground surface is to supply the bed-filling slurry to the bed-filling slurry conduit 1, to ensure the full pipe flow condition in the vertical pipe 2, to make the flow rate of the bed-filling slurry to be delivered offset the frictional loss in the pipe, and to prevent the pipe blockage phenomenon caused by the insufficient static head of the vertical pipe 2. Wherein, the inside agitating unit 8 that calms the anger that is provided with of stock chest 7, agitating unit 8 that calms the anger can be to the mineral deposit slurry filling line stirring processing, and produces the pressure of transmission to the mineral deposit slurry filling, makes the mineral deposit slurry filling have certain velocity of flow and then can transport in the mineral deposit slurry filling pipe 1. Wherein, the inlet is provided with a storage tank, the storage tank position of all installed filling slurry supply devices should be raised as much as possible (the generated static pressure head is large), and should be close to the vertical pipe or the drilling hole so as to optimize the feeding condition, and the storage tank 7 is internally provided with an air compressing device 7, the embodiment of the application is improved to make the best use of the available static pressure head of the filling slurry in the storage tank 7, thereby minimizing the friction loss of the storage tank 7 and the pipe section of the vertical pipe 2. This ensures that the positive pressure of the filler slurry is formed in the vertical pipe 2, that is, an excessive amount of the filler slurry is supplied to the vertical pipe 2 (or the drilled hole).
Example 2
Fig. 2 provides a flow chart of a method of bed filling, comprising in particular the steps of:
and S1, mixing the cement and the graded tailings according to the mass ratio of 1:4 to obtain a filling material, and preparing the filling material and water into ore deposit filling slurry with the mass concentration of 76%.
Step S2, the bed filling apparatus in example 1 of the present application is used to transport the bed filling slurry.
Examples 3 to 8
Examples 3 to 8 are different from example 2 in the mass ratio of cement to tailings and the mass ratio of filler to water, and the details are shown in table 1.
TABLE 1 Ore deposit Filler proportioning and slump analysis
Among them, the caving degree of the bed filling slurry in the examples 2 to 7 is within the range of 26.8 to 29.10, and the slurry has good fluidity.
Example 8
Example 8 is different from example 2 in that the inlet level of the deposit-packed slurry conduit was +114m, the outlet level of the vertical pipe was-455 m, the height difference was 569m, the total pipe length was 1542m, and the packing doubling line was 2.71, as shown in table 2.
Examples 9 to 23
Examples 10 to 24 are different from example 10 in the height difference between the inlet level of the deposit-packed slurry guide pipe 1 and the outlet level of the second pipe and the packing multiple line value, and the details are shown in table 2.
TABLE 2 filling line doubling statistics
Referring to Table 2, in examples 8 to 22, the height difference between the deposit-filling slurry conduit and the inlet elevation and the height difference between the second conduit outlet elevation are between 320 m and 721m, and the filling fold line is between 2m and 4 m.
Performance testing
Examples 8 to 22 provide deposit-filling apparatuses for transporting the deposit-filling slurries formulated in examples 2 to 7, wherein the flow rate of the deposit-filling slurry in the second pipe 7 was 3.54m/s, as detailed in table 3.
TABLE 3 filling material full rate under filling pipe line of different proportions
For the deposit filling slurry of example 3, the filling slurry using the graded tailings as the aggregate has good fluidity, and when the filling multiple line is less than 2, the full pipe rate is low; when the filling amount is small and the slurry concentration is low, the full pipe rate is even less than 0.1; when the filling multiple line is between 2 and 3, the full rate of most filling pipeline systems is between 0.2 and 0.3; when the filling multiple line is between 3 and 4, the full rate of most filling pipeline systems is between 0.3 and 0.5. Therefore, when the filling multiple line 3 is about, better full-pipe rate working condition can be obtained, and the filling multiple line can be properly increased to improve the full-pipe rate of pipeline transportation.
For examples 3 and 5, the fine tailings were 4:6, and the fluidity of the filling slurry was decreased after 60% of the graded tailings was replaced with the fine-graded tailings, so that the mixed aggregate filling slurry full rate was slightly higher than that when the graded tailings aggregate was used. The mixed aggregate proportioning filling slurry full-pipe rate difference interval is obvious, and the full-pipe rate is less than 1. When the filling double line is about 3, the full fill rate is substantially about 0.6, and the full fill rate state is preferable.
In examples 4, 6 and 7, the filling slurry in example 4 had poor fluidity when non-cemented filling was used, and when the system filling flow rate reached 3.54m/s and the filling doubling line was more than 3, the full pipe rate exceeded 1, and pipe plugging and pipe bursting were likely to occur. The filler slurries of the blending examples 9 and 7 are inferior in fluidity, and when the fold line exceeds 2, the full tube percentage is larger than 1, and the self-feeding is not facilitated.
Generally, the pipe filling rate of filling slurry adopting graded tailings as main aggregate can meet the pipeline conveying requirement of the ore at the present stage, and the pipe filling rate of cemented and non-cemented filling slurry adopting fine-graded tailings as single aggregate is large, so that necessary pressurizing or resistance reducing measures need to be taken. From the filling multiple line, the multiple line in the conventional ore filling pipeline is between 2 and 3, which better meets the requirement of the full-filling pipe rate, and the reasonable full-filling pipe rate cannot be reached if the multiple line is too large or too small.
TABLE 4 pipe diameter 154mm surface filling pipe full rate condition
According to the calculation and analysis of the pipe diameter of 154mm, the filling pipe diameter is increased to be smaller, the hydraulic gradient is reduced, the pipeline conveying resistance is reduced, the full pipe rate of the filling slurry is obviously reduced, the self-flowing full pipe conveying is realized, and the full pipe rate is ideally filled according to other proportions except the proportion of the X2 fine tailings non-cementitious material. In addition, the SL5, SL6, and SL7 are large times, and although the reduction in the full pipe ratio is significant, the ideal state cannot be achieved, and it is necessary to provide a relatively small pumping pressure compared to the pipe diameter of 100 m.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.
Claims (10)
1. An ore deposit filling apparatus, comprising:
a bed filling slurry conduit having one end thereof as an inlet end for bed filling slurry;
at least one end part of the vertical pipe extends into the mineral deposit to be filled, and the other end of the vertical pipe is connected with the other end of the mineral deposit filling slurry conduit;
wherein the inner diameter of the deposit fill slurry conduit is greater than the inner diameter of the riser.
2. The apparatus of claim 1, wherein the inner diameter of the bed-filling slurry conduit is greater than the inner diameter of the vertical pipe, the apparatus further comprising a reducer, the reducer being a reducer, the smaller inner diameter end of the reducer being connected to one end of the vertical pipe, the larger inner diameter end of the reducer being connected to the end of the bed-filling slurry conduit.
3. The apparatus for filling mineral deposits according to claim 1, wherein the elevation difference between the inlet end elevation of the mineral deposit filling slurry conduit and the outlet end elevation of the vertical pipe is between 320 and 721m, and the filling multiple line is between 2 and 4.
4. The apparatus according to claim 1, wherein the bed filling slurry conduit comprises a first slurry conduit, a first elbow, and a second slurry conduit, and the first slurry conduit, the elbow, and the second slurry conduit are connected in series in a direction of conveyance of the bed filling slurry, wherein one end of the second slurry conduit is connected to the vertical pipe, and the other end of the first slurry conduit connected to the elbow serves as the inlet end of the bed filling slurry.
5. The apparatus for filling mineral deposits according to claim 1, further comprising a transverse tube disposed deep in the mineral deposit and having one end connected to the other end of the vertical tube opposite to the end connected to the mineral deposit filling slurry conduit, the other end of the transverse tube extending deep in the mineral deposit and serving as a final discharge port for the mineral deposit filling slurry.
6. A method of bed filling, comprising the steps of:
preparing ore deposit filling slurry;
transporting the deposit fill slurry with the deposit filling apparatus of any one of claims 1 to 5.
7. The method of claim 6, wherein when the inner diameter of the deposit fill slurry conduit is less than or equal to 88mm, the deposit fill slurry is transported by a self-flowing transport method, and the fill rate of the deposit fill slurry conduit increases by a magnitude of not less than 60%; or
And when the inner diameter of the vertical pipe is smaller than or equal to 154mm, the ore deposit filling slurry is conveyed by adopting a pressurizing and conveying method, and the full pipe rate of the vertical pipe is increased by not less than 80%.
8. The method for filling the ore deposit according to claim 6, wherein the ore deposit filling slurry comprises cement, tailings and water, wherein the mass ratio of the cement to the tailings is 1: 3-0: 1, the mass ratio of the total mass of the cement and the tailings to the water is 64: 32-76: 24; or/and
the slump of the deposit fill slurry is greater than 25 cm.
9. The method of claim 8, wherein the tailings comprise at least one of graded tailings and fine tailings.
10. The method of claim 9, wherein in said classification tailings, the weight ratio of particles having a particle size of less than 21 μm in said classification tailings is greater than 15.91%; or/and
in the fine tailings, the weight ratio of particles with the particle size of less than 21 mu m in the fine tailings is more than 62.51%.
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