Underground ore transporting and lifting system

Abstract

The utility model discloses an underground ore transporting and lifting system which comprises an ore pulping system used for making exploited ore into ore pulp capable of being conveyed through a pipeline. The system is structurally characterized by further comprising N stages of pipeline conveying subsystems, every two adjacent stages of pipeline conveying subsystems are arranged in series in the height direction, and N is a positive integer and is larger than or equal to 2; the pipeline conveying subsystem comprises a conveying pump, an ore pulp stirrer and a lifting pipeline, the lower end part of the lifting pipeline is communicated with the output end of the conveying pump, the upper end part of the lifting pipeline is communicated with the inlet end of the ore pulp stirrer, and the outlet end of the ore pulp stirrer is communicated with the input end of the conveying pump in the adjacent pipeline conveying subsystem positioned above; the output end of the ore pulping system is communicated with a conveying pump feeding port in the first-stage pipeline conveying subsystem through a conveying pipeline. The lifting system can solve the technical problem that ore pulp is separated in the upward long-distance conveying process.

Description

Technical Field

[0001] The utility model belongs to the technical field of mining, and in particular relates to an underground ore transportation and hoisting system. Background Art

[0002] With the growing demand for efficient, safe, and intelligent mining in both domestic and international mines, some underground non-coal mines, such as bauxite, potash, and gold mines, are gradually exploring the use of boom roadheaders (BTHs) for mechanical mining. This mining method uses a boom roadheader to drop ore, which is then unloaded by shuttle cars or belt conveyors. The ore is then transported to an ore chute by belt conveyors, and finally hoisted to the surface using conventional hoisting methods such as winding or friction. Compared to traditional drilling and blasting, BTHs offer advantages such as efficiency, safety, environmental friendliness, and sustainability. BTHs break ore into smaller pieces through cutting, generating significant amounts of dust. Therefore, spray systems are installed on the head of the BTHs for dust reduction, and mines also employ dust removal equipment for secondary dust reduction. The water released by the spray system can cause dust and small rock fragments to compact and adhere to the belt, preventing them from reaching the next stage of transportation and even causing material blockages, leading to transport interruptions. Furthermore, fine-grained ore is prone to generating secondary dust during transportation, polluting the underground environment.

[0003] At present, some studies have proposed to lift ore by pulping, such as the underground mine ore lifting method disclosed in China Invention Patent Application Publication No. CN104481533A, the deep well double-tube hydraulic ore lifting method disclosed in China Invention Patent Application Publication No. CN105858228A, and the continuous deep well hydraulic ore lifting system and method of use disclosed in China Invention Patent Authorization Announcement No. CN114109484A. Although the existing technology has pulped the ore and then lifted it, there are three defects: (1) the ore pulp is directly lifted from the underground to the surface at one time, and the lifting height is limited, which is only applicable to mines with shallow mining depths; (2) during the long-distance upward transportation of the ore pulp, segregation and other problems will inevitably occur, which is very likely to cause serious accidents such as pipe blockage and pipe burst; (3) the ore pulping and transportation are independent systems. After the ore pulping, a ore pulp storage bin or storage tank needs to be set up. The process is discontinuous and difficult to achieve intelligentization. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model aims to provide an underground ore transportation and hoisting system, which can solve the technical problems of segregation of ore slurry during long-distance upward transportation and limited hoisting height.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] An underground ore transportation and hoisting system includes an ore pulping system for converting mined ore into ore pulp that can be transported through pipelines. Its structural characteristics are: it also includes N-level pipeline transportation subsystems, with two adjacent levels of pipeline transportation subsystems arranged in series along the height direction, N being a positive integer and N≥2; the pipeline transportation subsystem includes a delivery pump, a slurry mixer and a lifting pipeline, the lower end of the lifting pipeline is connected to the output end of the delivery pump, the upper end is connected to the inlet end of the slurry mixer, and the outlet end of the slurry mixer is connected to the input end of the delivery pump in the adjacent pipeline transportation subsystem located above; the output end of the ore pulping system is connected to the delivery pump inlet of the first-level pipeline transportation subsystem via a delivery pipeline.

[0007] The underground ore transportation and hoisting system of the present application increases the lifting height of the ore slurry by setting up N-level pipeline transportation subsystems to pressurize the ore slurry multiple times. By setting up slurry mixers in the pipeline transportation subsystems at each level, the slurry after long-distance transportation is re-pulped to prevent the slurry from segregating, so that the slurry will not segregate during the long-distance upward transportation. In addition, as the underground mining depth continues to increase, by adding a pipeline transportation subsystem at the lower level and moving the ore pulping system to the first-level pipeline transportation subsystem, underground ore transportation and hoisting can continue to be achieved, perfectly adapting to the ore hoisting needs at different mining stages.

[0008] Preferably, the ore pulping system includes a first vibrating screen, an ore crusher, a second vibrating screen, an ore distributor and a pulper, wherein the first vibrating screen is used to screen the mined ore; the under-screen discharge port of the first vibrating screen is connected to the inlet of the ore distributor, and the over-screen discharge port of the first vibrating screen is connected to the inlet of the ore crusher; the ore crusher discharge port is connected to the inlet of the second vibrating screen, the under-screen discharge port of the second vibrating screen is connected to the inlet of the ore distributor, and the over-screen discharge port of the second vibrating screen is connected to the inlet of the ore crusher; the ore distributor discharge port is connected to the inlet of the pulper, and the pulper discharge port is connected to the inlet of the conveying pump in the first-stage pipeline conveying subsystem. After the mined ore is conveyed to the first vibrating screen for screening, the under-screen ore that meets the particle size requirements enters the ore distributor. The ore on the screen with large particle size in the first vibrating screen is transported to the ore crusher for crushing, and then transported to the second vibrating screen for secondary screening. The ore under the screen that meets the particle size requirements enters the ore classifier. The ore in the ore classifier is transported to the pulping machine for pulping to obtain ore pulp.

[0009] Preferably, there are multiple pulping machines, the feed inlets of each of which are connected to the discharge outlet of the ore distributor, and the discharge outlets of each of which are connected to the feed inlet of the delivery pump in the first-stage pipeline delivery subsystem. By providing multiple pulping machines to perform pulping in turn and continuously delivering the ore through the pipeline delivery subsystem, the ore pulping and delivery systems are connected, achieving a continuous process.

[0010] Preferably, the mesh sizes of the screens on the first vibrating screening machine and the second vibrating screening machine are both 1 cm to 2 cm.

[0011] Preferably, the diameter of the lifting pipe in the pipeline transportation subsystem is 250mm to 350mm, the height of the lifting pipe in the Nth level pipeline transportation subsystem is not more than 100m, and the height of the lifting pipe in other levels of pipeline transportation subsystems is 80m to 100m.

[0012] Preferably, a concentration meter is provided at the feed port of the slurry mixer in each level of the pipeline transportation subsystem. The concentration meter and the slurry mixer are electrically connected to a control system, and the control system controls the stirring speed of the slurry mixer according to the slurry concentration measured by the concentration meter. Although the height difference between two adjacent pipeline transportation subsystems is basically the same, the different positions of the pipeline transportation subsystems at each level of the mine result in different horizontal distances of slurry transportation, resulting in different degrees of segregation of the slurry transported to the next level of slurry mixer. In order to better complete the task of re-pulping slurries with different degrees of segregation, by providing a concentration meter and a control system, different stirring speeds are set for the slurry mixers according to the different degrees of slurry segregation in each slurry mixer.

[0013] Preferably, the water used in the ore pulping system is underground water. The underground ore transportation and hoisting system of the utility model uses underground water for pulping, effectively utilizing underground water, avoiding waste of groundwater resources, and to a certain extent playing the role of an underground drainage system, or even completely replacing the underground drainage system, reducing drainage costs, or even eliminating drainage costs.

[0014] Preferably, the pipeline transportation subsystem is provided with multiple delivery pumps and slurry mixers, and the number of delivery pumps and slurry mixers is equal and corresponding. The two ends of the lifting pipeline are respectively provided with a first valve and a second valve. The first valve is connected to the discharge ports of the multiple delivery pumps through a delivery pipeline, and the second valve is connected to the feed ports of the multiple slurry mixers through a delivery pipeline. The discharge ports of the multiple slurry mixers are respectively connected to the feed ports of the multiple delivery pumps in the adjacent pipeline transportation subsystem located above through a delivery pipeline. The output end of the ore pulping system is connected to the feed ports of the multiple delivery pumps in the first-stage pipeline transportation subsystem through a delivery pipeline. The first valve is provided to control the slurry from the first delivery pump or the second delivery pump and prevent the slurry from flowing back into the other delivery pump. The second valve is provided to control the slurry in the lifting pipeline from being input into the first slurry mixer or the second slurry mixer.

[0015] Preferably, the pipeline conveying subsystem is provided with a first conveying pump, a second conveying pump, a first slurry mixer corresponding to the first conveying pump, and a second slurry mixer corresponding to the second conveying pump; the ore pulping system is provided with a first pulping machine and a second pulping machine, the discharge port of the first pulping machine is connected to the feed port of the first conveying pump in the first-level pipeline conveying subsystem through a conveying pipeline, and the discharge port of the second pulping machine is connected to the feed port of the second conveying pump in the first-level pipeline conveying subsystem through a conveying pipeline; the discharge port of the first pulping machine is connected to the feed port of the first conveying pump in the adjacent pipeline conveying subsystem located above through a conveying pipeline, and the discharge port of the second pulping machine is connected to the feed port of the second conveying pump in the adjacent pipeline conveying subsystem located above through a conveying pipeline. The underground ore transportation and hoisting system of the present invention is provided with two pulping machines and two conveying pipelines in the pipeline conveying subsystem, so that the slurry is continuously transported upward to the surface along the two conveying pipelines, thereby realizing intelligent transportation, saving transportation time, and improving transportation efficiency.

[0016] Preferably, the first and second slurry mixers in the pipeline transportation subsystem are each equipped with a concentration meter at their feed inlets, and the concentration meter, the first and second slurry mixers are all electrically connected to a control system. The control system controls the stirring speeds of the first and second slurry mixers based on the slurry concentration measured by the concentration meter, so that upon completion of pumping the slurry into the first and second slurry mixers, the first and second slurry mixers simultaneously complete stirring. The control system compares the slurry concentration measured by the concentration meter with the slurry concentration at which segregation does not occur, thereby controlling the stirring speeds of the first and second slurry mixers in each stage of the pipeline transportation subsystem, so that upon completion of pumping the slurry into the first and second slurry mixers, the first and second slurry mixers simultaneously complete stirring, thereby facilitating intelligent transportation.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] (1) The underground ore transportation and hoisting system of the utility model increases the lifting height of the ore slurry by providing an N-level pipeline transportation subsystem to pressurize the ore slurry multiple times, and provides a slurry mixer in the pipeline transportation subsystem to stir the ore slurry, thereby preventing the slurry from segregating after long-distance transportation and reducing the possibility of clogging of the transportation pipeline;

[0019] (2) The underground ore transportation and hoisting system of the present invention is provided with two pulping machines and two conveying pipelines in the pipeline conveying subsystem, so that the ore slurry is continuously transported upward to the surface along the two conveying pipelines, thereby realizing continuous transportation and intelligent control, saving transportation time and improving transportation efficiency;

[0020] (3) The underground ore transportation and hoisting system of the utility model effectively utilizes underground water and avoids the waste of underground water resources;

[0021] (4) The underground ore transportation and hoisting system of the utility model plays the role of an underground drainage system to a certain extent, and even completely replaces the underground drainage system, thereby reducing drainage costs or even eliminating drainage costs;

[0022] (5) The underground ore transportation and hoisting system of the present invention avoids the problem of having to build a main mine shaft for vertical shaft hoisting, reduces the cost of deep well mining, and shortens the construction period of mine construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of the underground ore transportation and hoisting system of the present utility model.

[0024] In the figure:

[0025] 1—first belt conveyor; 2—first vibrating screen; 3—second belt conveyor; 4—third belt conveyor; 5—ore crusher; 6—fourth belt conveyor; 7—second vibrating screen; 8—fifth belt conveyor; 9—sixth belt conveyor; 10—ore separator; 11—seventh belt conveyor; 12—eighth belt conveyor; 13—pulping machine; 1301—first pulping machine; 1302—second pulping machine; 14—ore pulping system; 15—first conveying pipeline; 16—second conveying pipeline; 17—first stage first conveying pump; 18—first stage second conveying pump; 19—first stage first conveying pipeline; 20—first stage second conveying pipeline; 21—first stage first valve; 22—first stage lifting pipeline; 23—first stage second valve; 24—first stage third conveying pipeline; 25—first stage fourth Conveying pipeline; 26—first stage first slurry mixer; 27—first stage second slurry mixer; 28—third conveying pipeline; 29—fourth conveying pipeline; 30—second stage first conveying pump; 31—second stage second conveying pump; 32—second stage first conveying pipeline; 33—second stage second conveying pipeline; 34—second stage first valve; 35—second stage lifting pipeline; 36—second stage second valve; 37—second stage third conveying pipeline; 38—second stage fourth conveying pipeline; 39—second stage first slurry mixer; 40—second stage second slurry mixer; 41—fifth conveying pipeline; 42—sixth conveying pipeline; 43—Nth stage first conveying pump; 44—Nth stage second conveying pump; 45—Nth stage first conveying pipeline; 46—Nth stage second conveying pipeline; 47—Nth stage first valve; 48—Nth stage lifting pipeline. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments and features of the embodiments of the present invention may be combined unless they conflict. For ease of description, the words "upper," "lower," "left," and "right" appear below merely to indicate the directions of upper, lower, left, and right in the accompanying drawings and do not limit the structure.

[0027] like Figure 1 As shown, the underground ore transportation and hoisting system of this embodiment includes an ore pulping system 14 and an N-stage pipeline transportation subsystem, where N is a positive integer and N ≥ 2. The ore pulping system 14 is used to process ore mined by mechanical mining equipment into ore pulp that can be transported via pipelines. The output end of the ore pulping system 14 is connected to the first-stage pipeline transportation subsystem via a transportation pipeline. The adjacent two-stage pipeline transportation subsystems are arranged in series along the height direction. The N-stage pipeline transportation subsystem is used to relay the ore pulp produced by the ore pulping system 14 to the surface.

[0028] like Figure 1As shown, the ore pulping system 14 includes a first vibrating screen 2, an ore crusher 5, a second vibrating screen 7, an ore classifier 10, and a pulper 13, wherein the pulper 13 includes a first pulper 1301 and a second pulper 1302. The feed port of the first vibrating screen 2 is connected to the mechanical mining equipment in the mining area via a first belt conveyor 1. The first vibrating screen 2 is used to screen the mechanically mined ore, and the screen size is 1 to 2 cm. The undersize ore of the first vibrating screen 2 enters the ore classifier 10 via a second belt conveyor 3, and the oversize ore of the first vibrating screen 2 enters the ore crusher 5 via a third belt conveyor 4 for crushing. The ore crusher 5 is used to crush the oversize ore of the first vibrating screen 2 into ore with a particle size of less than 1 to 2 cm. The discharge port of the ore crusher 5 is connected to the feed port of the second vibrating screen 7 via a fourth belt conveyor 6. The second vibrating screen 7 is used to screen the ore crushed by the ore crusher 5. Its screen size is 1-2 cm. The undersize ore from the second vibrating screen 7 enters the ore separator 10 via the fifth belt conveyor 8. The oversize ore from the second vibrating screen 7 enters the ore crusher 5 via the sixth belt conveyor 9 for further crushing. The ore separator 10 is used to distribute the undersize ore from the first vibrating screen 2 and the second vibrating screen 7 to the first pulping machine 1301 and the second pulping machine 1302 via the seventh belt conveyor 11 and the eighth belt conveyor 12, respectively. The first pulping machine 1301 is used to convert the ore conveyed by the ore separator 10 into a pulp with a mass concentration of no more than 30%. The discharge port of the first pulping machine 1301 is connected to the first-stage pipeline conveying subsystem via the first conveying pipeline 15. The second pulping machine 1302 is used to make the ore conveyed by the ore distributor 10 into ore pulp with a mass concentration of no more than 30%. The discharge port of the second pulping machine 1302 is connected to the first-stage pipeline conveying subsystem through the second conveying pipeline 16.

[0029] The pipeline transportation subsystem includes two delivery pumps, two slurry mixers and a vertically arranged lifting pipeline. The two delivery pumps are arranged in parallel, and the two slurry mixers are correspondingly arranged above the two delivery pumps. The height difference between the two adjacent pipeline transportation subsystems is 80m to 100m. A first valve is provided at the lower end of the lifting pipeline, and a second valve is provided at the upper end. The first valve is connected to the output end of the two delivery pumps, and the second valve is connected to the inlet end of the two slurry mixers. The outlet end of the slurry mixer is connected to the input end of the delivery pump in the adjacent pipeline transportation subsystem located above. Figure 1As shown, the first-stage pipeline transportation subsystem includes a first-stage first delivery pump 17, a first-stage second delivery pump 18, a first-stage first delivery pipeline 19, a first-stage second delivery pipeline 20, a first-stage first valve 21, a first-stage lifting pipeline 22, a first-stage second valve 23, a first-stage third delivery pipeline 24, a first-stage fourth delivery pipeline 25, a first-stage first slurry mixer 26, and a first-stage second slurry mixer 27. The first-stage first valve 21 and the first-stage second valve 23 are respectively disposed at the lower end and the upper end of the first-stage lifting pipeline 22. The first-stage first valve 21 is connected to the first-stage first delivery pump 17 and the first-stage second delivery pump 18 via the first-stage first delivery pipeline 19 and the first-stage second delivery pipeline 20, respectively. The first-stage first delivery pump 17 is used to deliver the slurry produced by the first pulping machine 1301 to the first-stage first slurry mixer 26 or the first-stage second slurry mixer 27 via the first-stage lifting pipe 22. The first-stage second delivery pump 18 is used to deliver the slurry produced by the second pulping machine 1302 to the first-stage first slurry mixer 26 or the first-stage second slurry mixer 27 via the first-stage lifting pipe 22. The first-stage first valve 21 controls the slurry flow from the first-stage first delivery pump 17 or the first-stage second delivery pump 18 and prevents slurry from flowing back into the other delivery pump. The first-stage lifting pipe 22 has a diameter of 250 mm to 350 mm and a delivery height of 80 m to 100 m. The first-stage second valve 23 controls the delivery of slurry from the first-stage lifting pipe 22 to the first-stage first slurry mixer 26 or the first-stage second slurry mixer 27. The first-stage first slurry mixer 26 re-pulps the slurry after lifting to prevent segregation and other problems during long-distance transportation. The discharge port of the first-stage first slurry mixer 26 is connected to the second-stage pipeline transportation subsystem via a third transportation pipeline 28. The first-stage second slurry mixer 27 re-pulps the slurry after long-distance transportation to prevent segregation and other problems during long-distance transportation. The discharge port of the first-stage second slurry mixer 27 is connected to the second-stage pipeline transportation subsystem via a fourth transportation pipeline 29.

[0030] like Figure 1As shown, the second-stage pipeline transportation subsystem includes a second-stage first delivery pump 30, a second-stage second delivery pump 31, a second-stage first delivery pipeline 32, a second-stage second delivery pipeline 33, a second-stage first valve 34, a second-stage lifting pipeline 35, a second-stage second valve 36, a second-stage third delivery pipeline 37, a second-stage fourth delivery pipeline 38, a second-stage first slurry mixer 39, and a second-stage second slurry mixer 40. The second-stage first valve 34 and the second-stage second valve 36 are respectively disposed at the lower end and the upper end of the second-stage lifting pipeline 35. The second-stage first valve 34 is connected to the second-stage first delivery pump 31 and the second-stage second delivery pump 33 via the second-stage first delivery pipeline 32 and the second-stage second delivery pipeline 33, respectively. The second-stage first delivery pump 30 is used to transport the slurry mixed by the first-stage first slurry mixer 26 of the first-stage pipeline transportation subsystem through the second-stage riser pipe 35 to the second-stage first slurry mixer 39 or the second-stage second slurry mixer 40. The second-stage second delivery pump 31 is used to transport the slurry mixed by the first-stage second slurry mixer 27 of the first-stage pipeline transportation subsystem through the second-stage riser pipe 35 to the second-stage first slurry mixer 39 or the second-stage second slurry mixer 40. The second-stage first valve 34 controls the slurry source from the second-stage first delivery pump 30 or the second-stage second delivery pump 31 and prevents slurry from flowing back into the other delivery pump. The second-stage riser pipe 35 has a diameter of 250 mm to 350 mm and a delivery height of 80 m to 100 m. The second-stage second valve 36 controls the delivery of slurry from the second-stage riser pipe 35 to the second-stage first slurry mixer 39 or the second-stage second slurry mixer 40. The second-stage first slurry mixer 39 re-pulps the slurry after long-distance transportation to prevent segregation and other problems. The discharge port of the second-stage first slurry mixer 39 is connected to the next-stage pipeline transportation subsystem via a fifth delivery pipeline 41. The second-stage second slurry mixer 40 re-pulps the slurry after long-distance transportation to prevent segregation and other problems. The discharge port of the second-stage second slurry mixer 40 is connected to the next-stage pipeline transportation subsystem via a sixth delivery pipeline 42.

[0031] like Figure 1As shown, the Nth-stage pipeline transportation subsystem includes an Nth-stage first delivery pump 43, an Nth-stage second delivery pump 44, an Nth-stage first delivery pipeline 45, an Nth-stage second delivery pipeline 46, an Nth-stage first valve 47, and an Nth-stage lift pipeline 48. The Nth-stage first valve 47 is located at the lower end of the Nth-stage lift pipeline 48. The Nth-stage first valve 47 is connected to the Nth-stage first delivery pump 43 and the Nth-stage second delivery pump 44 via the Nth-stage first delivery pipeline 45 and the Nth-stage second delivery pipeline 46, respectively. The Nth-stage first delivery pump 43 is used to transport the slurry stirred by the first slurry mixer in the previous-stage pipeline transportation subsystem to the surface through the Nth-stage lift pipeline 48. The Nth-stage second delivery pump 44 is used to transport the slurry stirred by the second slurry mixer in the previous-stage pipeline transportation subsystem to the surface through the Nth-stage lift pipeline 48. The Nth-stage first valve 47 controls whether the slurry originates from the Nth-stage first delivery pump 43 or the Nth-stage second delivery pump 44, and prevents the slurry from flowing back into the other delivery pump. The diameter of the Nth stage lifting pipeline 48 is 250 mm to 350 mm, and the conveying height is the difference in elevation between the Nth stage first conveying pump 43 or the Nth stage second conveying pump 44 and the ground surface, which is not greater than 100 m.

[0032] The first and second slurry mixers in the pipeline transportation subsystem are each equipped with a concentration meter at their feed inlets. The concentration meter, the first and second slurry mixers are all electrically connected to a control system. The control system controls the stirring speeds of the first and second slurry mixers based on the slurry concentrations measured by the concentration meter, so that when the slurry is pumped into the first and second slurry mixers, the first and second slurry mixers complete stirring simultaneously.

[0033] This embodiment also provides an underground ore transportation and hoisting method, which uses the above-mentioned underground ore transportation and hoisting system, including the following steps, through which the ore is continuously transported and hoisted to the surface:

[0034] Step 1: Use the first vibrating screen 2, the ore crusher 5 and the second vibrating screen 7 to screen out the larger ore mined by the mechanical mining equipment and crush it into small rock pieces of 1 to 2 cm;

[0035] Step 2: Use the ore distributor 10 to distribute the ore rock to the first pulping machine 1301, and inject underground water into the first pulping machine 1301 to start pulping;

[0036] Step 3: After the slurry in the first pulping machine 1301 reaches the specified amount, the following three operations are performed simultaneously: ① Stop the pulping work of the first pulping machine 1301; ② Use the ore distributor 10 to distribute the ore rock to the second pulping machine 1302, and inject underground water into the second pulping machine 1302 to start the pulping work; ③ Rotate the first-stage first valve 21 switch to a position that allows the slurry in the first-stage first delivery pump 17 to pass through, rotate the first-stage second valve 23 switch to a position that allows the slurry to enter the first-stage first slurry mixer 26, then turn on the first-stage first delivery pump 17 to start pumping the slurry produced by the first pulping machine 1301 to the first-stage first slurry mixer 26, and turn on the first-stage first slurry mixer 26 to start stirring the slurry;

[0037] Step 4: After the slurry produced by the first pulping machine 1301 is pumped, step 2 and the following five operations are performed simultaneously: ① Close the first-stage first delivery pump 17; ② Stop the pulping work of the second pulping machine 1302; ③ Stop the stirring work of the first-stage first pulp mixer 26; ④ Rotate the switch of the first-stage first valve 21 to the position that allows the slurry in the first-stage second delivery pump 18 to pass through, rotate the switch of the first-stage second valve 23 to the position that allows the slurry to enter the first-stage second pulp mixer 27, and open the first-stage second delivery pump 18 to start pumping the second pulping machine 1302. 4. The slurry prepared is fed to the first-stage second slurry mixer 27, and the first-stage second slurry mixer 27 is turned on to start stirring the slurry; ⑤ The second-stage first valve 34 is rotated to a position allowing the slurry in the second-stage first delivery pump 30 to pass through, and the second-stage second valve 36 is rotated to a position allowing the slurry to enter the second-stage first slurry mixer 39, and then the second-stage first delivery pump 30 is turned on to start pumping the slurry stirred by the first-stage first slurry mixer 26 to the second-stage first slurry mixer 39, and the second-stage first slurry mixer 39 is turned on to start stirring the slurry;

[0038] Step 5: After the slurry is pumped after being stirred by the first-stage first slurry mixer 26, step 3 and the following six operations are carried out simultaneously: ① Turn off the first-stage second delivery pump 18; ② Turn off the second-stage first delivery pump 30; ③ Stop the stirring operation of the first-stage second slurry mixer 27; ④ Stop the stirring operation of the second-stage first slurry mixer 39; ⑤ Rotate the switch of the second-stage first valve 34 to the position that allows the slurry in the second-stage second delivery pump 31 to pass through, rotate the switch of the second-stage second valve 36 to the position that allows the slurry to enter the second-stage second slurry mixer 40, and then open the second-stage The second delivery pump 31 starts pumping the slurry stirred by the first-stage second slurry mixer 27 to the second-stage second slurry mixer 40, and the second-stage second slurry mixer 40 is turned on to start stirring the slurry; ⑥ The first valve switch of the next stage is rotated to a position allowing the slurry in the next-stage first delivery pump to pass through, and the second valve switch of the next stage is rotated to a position allowing the slurry to enter the next-stage first slurry mixer, and then the first delivery pump of the next stage is turned on to start pumping the slurry stirred by the previous-stage first slurry mixer to the next-stage first slurry mixer, and the next-stage first slurry mixer is turned on to start stirring the slurry;

[0039] Step 6: After the slurry is pumped after stirring by the first slurry mixer of the N-2 stage, perform step 4 and the following six operations simultaneously: ① Turn off the second delivery pump of the N-2 stage; ② Turn off the first delivery pump of the N-1 stage; ③ Stop the stirring work of the second slurry mixer of the N-2 stage; ④ Stop the stirring work of the first slurry mixer of the N-1 stage; ⑤ Rotate the switch of the first valve of the N-1 stage to the position that allows the slurry in the second delivery pump of the N-1 stage to pass through, and rotate the switch of the second valve of the N-1 stage to the position that allows the slurry in the second delivery pump of the N-1 stage to pass through. ⑥ The slurry enters the position of the N-1th stage second slurry mixer, then the N-1th stage second delivery pump is turned on to start pumping the slurry stirred by the N-2th stage second slurry mixer to the N-1th stage second slurry mixer, and the N-1th stage second slurry mixer is turned on to start stirring the slurry; ⑥ The Nth stage first valve 47 switch is rotated to a position allowing the slurry in the Nth stage first delivery pump 43 to pass through, and then the Nth stage first delivery pump 43 is turned on to start pumping the slurry stirred by the N-1th stage first slurry mixer to the surface;

[0040] Step 7: After the slurry stirred by the N-1-stage first slurry mixer is pumped, step 5 and the following four operations are performed simultaneously: ① Turn off the N-1-stage second delivery pump; ② Turn off the N-stage first delivery pump 43; ③ Stop the stirring operation of the N-1-stage second slurry mixer; ④ Rotate the N-stage first valve 47 to a position that allows the slurry in the N-stage second delivery pump 44 to pass through, and then turn on the N-stage second delivery pump 44 to start pumping the slurry stirred by the N-1-stage second slurry mixer to the surface;

[0041] Step 8: After the slurry stirred by the second slurry mixer at the N-1 stage is pumped, step 6 and one of the following operations are performed simultaneously: ① Turn off the second delivery pump 44 at the N stage.

[0042] The first pulping machine 1301 and the second pulping machine 1302 alternately produce pulp and stagger the pulping process into the first-level pipeline transportation subsystem. The pulp in the first pulp mixer in each level of the pipeline transportation subsystem is continuously pumped by the first delivery pump in the next-level pipeline transportation subsystem to the first pulp mixer corresponding to the first delivery pump for mixing. At the same time, the second delivery pump in each level of the pipeline transportation subsystem continuously pumps the pulp in the second pulp mixer in the previous-level pipeline transportation subsystem to the second pulp mixer corresponding to the second delivery pump until all the pulp is transported to the surface. The underground ore transportation and lifting method of this embodiment is provided with two pulping machines and two delivery pipelines in the pipeline transportation subsystem, so that the pulp is continuously transported upward to the surface along the two delivery pipelines, saving transportation time and improving transportation efficiency.

[0043] The contents described in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent modifications to the embodiments by those skilled in the art fall within the scope defined by the claims attached to the present invention.

Claims

1. An underground ore transportation and hoisting system, comprising an ore pulping system (14) for converting mined ore into a pulp that can be transported through a pipeline; characterized in that: It also includes N-level pipeline transportation subsystems, where two adjacent levels of pipeline transportation subsystems are arranged in series along the height direction, where N is a positive integer and N≥2; The pipeline transportation subsystem includes a delivery pump, a slurry mixer and a lifting pipeline. The lower end of the lifting pipeline is connected to the output end of the delivery pump, the upper end is connected to the inlet end of the slurry mixer, and the outlet end of the slurry mixer is connected to the input end of the delivery pump in the adjacent pipeline transportation subsystem located above; The output end of the ore pulping system (14) is connected to the feed port of the delivery pump in the first-stage pipeline delivery subsystem through a delivery pipeline.

2. The underground ore transportation and hoisting system according to claim 1, characterized in that: The ore pulping system (14) comprises a first vibrating screen (2), an ore crusher (5), a second vibrating screen (7), an ore classifier (10) and a pulping machine (13), wherein the first vibrating screen (2) is used to screen the mined ore; the under-screen discharge port of the first vibrating screen (2) is connected to the feed port of the ore classifier (10), and the over-screen discharge port of the first vibrating screen (2) is connected to the feed port of the ore crusher (5); the ore The crusher (5) discharge port is connected to the feed port of the second vibrating screen (7), the under-screen discharge port of the second vibrating screen (7) is connected to the feed port of the ore classifier (10), and the over-screen discharge port of the second vibrating screen (7) is connected to the feed port of the ore crusher (5); the ore classifier (10) discharge port is connected to the feed port of the pulping machine (13), and the pulping machine (13) discharge port is connected to the feed port of the conveying pump in the first-stage pipeline conveying subsystem.

3. The underground ore transportation and hoisting system according to claim 2, characterized in that: There are multiple pulping machines (13), the feed ports of the multiple pulping machines (13) are all connected to the discharge port of the ore distributor (10), and the discharge ports of the multiple pulping machines (13) are all connected to the feed port of the conveying pump in the first-level pipeline conveying subsystem.

4. The underground ore transportation and hoisting system according to claim 2, characterized in that: The mesh sizes of the screens on the first vibrating screening machine (2) and the second vibrating screening machine (7) are both 1 cm to 2 cm.

5. The underground ore transportation and hoisting system according to claim 1, characterized in that: The diameter of the lifting pipe in the pipeline transportation subsystem is 250mm~350mm, the height of the lifting pipe in the Nth level pipeline transportation subsystem is not more than 100m, and the height of the lifting pipe in other levels of pipeline transportation subsystems is 80m~100m.

6. The underground ore transportation and hoisting system according to claim 1, characterized in that: A concentration meter is provided at the inlet of the slurry mixer in each level of the pipeline transportation subsystem. The concentration meter and the slurry mixer are electrically connected to the control system. The control system controls the stirring speed of the slurry mixer according to the slurry concentration measured by the concentration meter.

7. The underground ore transportation and hoisting system according to claim 1, characterized in that: The water used in the ore pulping system (14) is underground water.

8. The underground ore transportation and hoisting system according to any one of claims 1 to 7, characterized in that: The pipeline transportation subsystem is provided with multiple delivery pumps and slurry mixers, and the number of delivery pumps and slurry mixers is equal and corresponding; the two ends of the lifting pipeline are respectively provided with a first valve and a second valve, the first valve is connected to the discharge ports of the multiple delivery pumps through a delivery pipeline, the second valve is connected to the feed ports of the multiple slurry mixers through a delivery pipeline, and the discharge ports of the multiple slurry mixers are respectively connected to the feed ports of the multiple delivery pumps in the adjacent pipeline transportation subsystem located above through a delivery pipeline; the output end of the ore pulping system (14) is connected to the feed ports of the multiple delivery pumps in the first-level pipeline transportation subsystem through a delivery pipeline.

9. The underground ore transportation and hoisting system according to claim 8, characterized in that: The pipeline transportation subsystem is provided with a first transportation pump, a second transportation pump, a first ore pulp mixer corresponding to the first transportation pump, and a second ore pulp mixer corresponding to the second transportation pump; the ore pulping system is provided with a first pulping machine (1301) and a second pulping machine (1302), the discharge port of the first pulping machine (1301) is connected to the feed port of the first transportation pump in the first-level pipeline transportation subsystem through a transportation pipeline, and the discharge port of the second pulping machine (1302) is connected to the feed port of the second transportation pump in the first-level pipeline transportation subsystem through a transportation pipeline; the discharge port of the first ore pulp mixer is connected to the feed port of the first transportation pump in the adjacent pipeline transportation subsystem located above through a transportation pipeline, and the discharge port of the second ore pulp mixer is connected to the feed port of the second transportation pump in the adjacent pipeline transportation subsystem located above through a transportation pipeline.

10. The underground ore transportation and hoisting system according to claim 8, characterized in that: The first slurry mixer and the second slurry mixer in the pipeline transportation subsystem are both provided with a concentration meter at the feeding port, and the concentration meter, the first slurry mixer and the second slurry mixer are all electrically connected to the control system; the control system controls the stirring speed of the first slurry mixer and the second slurry mixer according to the slurry concentration measured by the concentration meter, so that when the slurry is pumped into the first slurry mixer and the second slurry mixer, the first slurry mixer and the second slurry mixer complete stirring at the same time.

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