CN112814732B - Waste stone and tailing mixed slurry preparation and pumping filling device - Google Patents
Waste stone and tailing mixed slurry preparation and pumping filling device Download PDFInfo
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- CN112814732B CN112814732B CN202110193117.6A CN202110193117A CN112814732B CN 112814732 B CN112814732 B CN 112814732B CN 202110193117 A CN202110193117 A CN 202110193117A CN 112814732 B CN112814732 B CN 112814732B
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- 238000005086 pumping Methods 0.000 title claims abstract description 55
- 239000004575 stone Substances 0.000 title claims abstract description 50
- 239000002699 waste material Substances 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 29
- 239000011268 mixed slurry Substances 0.000 title claims abstract description 16
- 239000010878 waste rock Substances 0.000 claims abstract description 75
- 239000002002 slurry Substances 0.000 claims abstract description 74
- 238000003756 stirring Methods 0.000 claims abstract description 49
- 210000001503 joint Anatomy 0.000 claims abstract description 33
- 238000007599 discharging Methods 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 239000004576 sand Substances 0.000 claims description 36
- 239000004568 cement Substances 0.000 claims description 31
- 239000000463 material Substances 0.000 claims description 27
- 230000007246 mechanism Effects 0.000 claims description 24
- 238000003860 storage Methods 0.000 claims description 17
- 239000002562 thickening agent Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
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- 230000008569 process Effects 0.000 description 9
- 239000002245 particle Substances 0.000 description 6
- 239000004567 concrete Substances 0.000 description 5
- 239000000945 filler Substances 0.000 description 5
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- 238000004519 manufacturing process Methods 0.000 description 4
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- 230000009286 beneficial effect Effects 0.000 description 3
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- 238000011084 recovery Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
- FYEHYMARPSSOBO-UHFFFAOYSA-N Aurin Chemical compound C1=CC(O)=CC=C1C(C=1C=CC(O)=CC=1)=C1C=CC(=O)C=C1 FYEHYMARPSSOBO-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- 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
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
- B02C23/12—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/0007—Pretreatment of the ingredients, e.g. by heating, sorting, grading, drying, disintegrating; Preventing generation of dust
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/06—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/06—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors
- B28C7/10—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors by means of rotary members, e.g. inclinable screws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C9/00—General arrangement or layout of plant
- B28C9/02—General arrangement or layout of plant for producing mixtures of clay or cement with other materials
-
- 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
- E21F13/00—Transport specially adapted to underground conditions
-
- 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
- E21F15/06—Filling-up mechanically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C2201/00—Codes relating to disintegrating devices adapted for specific materials
- B02C2201/06—Codes relating to disintegrating devices adapted for specific materials for garbage, waste or sewage
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Food Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a waste rock and tailing mixed slurry preparation and pumping filling device which comprises a slurry preparation system, a waste rock crushing system, a stirring system and a pumping filling system, wherein the slurry preparation system is arranged on the ground surface, the waste rock crushing system, the stirring system and the pumping filling system are all arranged underground, the slurry preparation system is in butt joint with the feeding end of the stirring system through a self-sliding filling pipeline, the discharging end of the waste rock crushing system is in butt joint with the feeding end of the stirring system, the pumping filling system is in butt joint with the mixture outlet of the stirring system, the slurry preparation system is used for preparing all-tailing cemented slurry, and the waste rock crushing system is used for crushing underground waste rock. The device can fully utilize underground waste stones to carry out cemented filling, can prevent the waste stones from going out of pits, greatly reduces the waste stone transportation and lifting cost, improves the comprehensive utilization rate of the waste stones, and realizes pumping filling of mixed high-concentration slurry of tailing slurry and waste stones by combining with the existing full-tailing cemented filling system.
Description
Technical Field
The invention relates to the technical field of underground mine filling mining, in particular to a waste rock and tailing mixed slurry preparation and pumping filling device.
Background
The filling mining method has the advantages of improving the recovery rate of resources, saving energy, reducing emission, protecting environment, safety and reliability. From the perspective of environmental protection and mining safety, the filling mining method represents one of the development trends of mining technologies at home and abroad. The underground mine filling mining technology and process are subjected to transition from dry filling to hydraulic filling, from low-concentration graded tailing cemented filling to full-tailing high-concentration cemented filling, paste-like, waste rock-full-tailing high-concentration pipe conveying filling technology and the like. In particular, a great deal of research and industrial application have been carried out in the aspect of filling the full tailings, and the utilization rate of part of mine tailings reaches a higher level. Throughout the current mine underground filling technology, tailings and waste stones are still the main sources of mine filling aggregates. Taking a mine exploited by a layered filling method as an example, the technology and technique of cemented filling by utilizing tailings are mature, but the current filling technology for mine barren rocks and full tailings is still used separately, so that most mines cannot effectively utilize barren rocks and full tailings for filling.
In fact, the process of filling the goaf with the waste rock can be traced back to the 50 s of the last century, and the waste rock is directly used as a filling body for filling while being picked up on a working platform in the early stage, or is directly put into the goaf. Then, in order to improve the strength of the waste rock filling body so as to facilitate the recovery of adjacent ore bodies, cement paste (or cement mortar) is added into the waste rock filling body, and the waste rock cemented filling technology is invented. The technology is widely applied to underground mines at home and abroad, but is mainly used for filling goaf once after stope stoping is finished. The waste rock cemented filling has the greatest advantages of saving cement consumption, relatively high strength of the filling body, low water content of the filling body, and small shrinkage deformation after the filling body is dried and coagulated, is commonly used for forming a high-strength filling body as an artificial ore pillar, and provides better safety guarantee for the next ore room exploitation.
From the technological point of view, the waste rock cemented filling is mainly mixed by adopting a mode of diverting and conveying waste rock and slurry and self-spraying the waste rock through the slurry in the pit. The self-showering mixing mode does not need a huge mechanical stirring system, so the preparation capacity is high. The waste stone is conveyed by the self-weight conveying or the mechanical conveying of mining trucks and the like, so that the defects of high requirement on aggregate grading and easy pipe blocking caused by a pipeline conveying coarse aggregate process are avoided, but the tailing self-sliding pipeline filling system used by the traditional filling process technology has the advantages of complex pipeline laying, low pipeline utilization rate, high labor capacity and high cost. And the size of the stone block is generally required to be within 300mm due to the limitation of transportation means, such as belt transportation. Meanwhile, the stone with the particle size within-25 mm is strictly controlled, and researches show that too many fine particles can cause slurry to well permeate into gaps of the stone, so that the boundary mortar is depleted, good package of stone aggregate cannot be realized, and the strength of the stone tailing filler is poor and the distribution is uneven. Meanwhile, the stone blocks and the mortar are uniformly mixed under an ideal state, so that the cementing filling body with the best effect can be formed. Ideally, the strength of the waste rock cementing filler can reach 2-4MPa and even higher.
In recent years, with the development of filling industry technology and equipment, the plunger pump capable of conveying high concentration realizes localization, and equipment investment is greatly reduced. Therefore, in mines where self-flow conveyance cannot be achieved due to a small difference in filling level and a long conveying distance, there is a need for high-concentration filling and for mines where a roof-top filling rate needs to be increased, and paste or paste-like pumping and filling are beginning to be emphasized. Pumping delivery filling is a filling method developed based on the rheological property of high-concentration solid-liquid mixture and its special flowing state in pipeline and on pumping concrete. The paste pumping filling can obtain high-density high-quality filling body, dehydration is not needed in the underground, and the filling is not limited by a doubling line due to the adoption of pressurized conveying. However, the success of the pump filling depends on the rheological properties of the charge produced and on the stability of the pipe when it is flowing and at rest. In particular, when the mixed slurry of waste stone and tailing is used for pumping filling, the pumping performance of the mixed filling is lower than that of concrete because the grading of the mixed filling is not as strict as that of concrete aggregate. The research and the solution of the simple, reliable and practical high-concentration filling material conveying technology and how to prevent and treat the problems of pipe blockage and long-distance pumping part abrasion possibly generated in operation are one of the development directions of the filling pipeline conveying technology and the process.
Meanwhile, in most mines exploited by adopting a filling method, if only waste rock tailing mixed slurry is used for pumping filling, the existing filling system is generally difficult to replace for filling in a large-scale stope due to limited pumping capacity and waste rock supply. In some mines in China, such as Hebei's yu aurin mine, automatic continuous pumping filling complete technical equipment suitable for underground environment is designed, and residual mine resource exploitation tests are carried out, but because cementing material cement adopts underground feeding, the problems of low transportation efficiency, mismatching with the filling capacity of an underground filling system, low equipment utilization rate, difficult dust control and the like are caused. The pumping filling equipment, especially the movable pumping filling equipment has the main advantages of small volume, flexible movement, rapid filling, simple pipeline laying, short pipeline, small pipeline resistance, low energy consumption and the like, and has obvious advantages in mining and leading surrounding rock to be broken, branching and compounding small veins and dispersed ore bodies, and artificial ore pillars, constructing bottoms and casting surfaces to be filled. Thus, mobile pumping can be an advantageous supplement to the filling process of mines in which the filling system is built.
Disclosure of Invention
The invention mainly aims to provide a waste rock and tailing mixed slurry preparation and pumping filling device, which can fully utilize underground waste rock to carry out cemented filling, can prevent the waste rock from going out of pits, greatly reduce the waste rock transportation and lifting cost, improve the comprehensive utilization rate of the waste rock, and realize the pumping filling of mixed high-concentration slurry of tailing slurry and waste rock (after crushing) by combining with the existing full-tailing cemented filling system, and has the characteristics of higher filling efficiency, no bleeding, high strength and low cost.
In order to solve the technical problems, the invention adopts the following technical scheme:
the waste rock and tailing mixed slurry preparation and pumping filling device comprises a slurry preparation system, a waste rock crushing system, a stirring system and a pumping filling system;
The slurry preparation system is arranged on the ground surface, the waste rock crushing system, the stirring system and the pumping filling system are all arranged underground, the slurry preparation system is in butt joint with the feeding end of the stirring system through a self-sliding filling pipeline, the discharging end of the waste rock crushing system is in butt joint with the feeding end of the stirring system, and the pumping filling system is in butt joint with the mixture outlet of the stirring system;
the slurry preparation system is used for preparing all-tailing cementing slurry, and the waste rock crushing system is used for crushing underground waste rock.
Specifically, the slurry preparation system comprises a tailing pond, a slurry pump, a deep cone thickener, a horizontal sand pond with a slurry making pipe and a slurry making nozzle, a stirring mechanism and a cement bin;
the tailing pond, the slurry pump, the deep cone thickener, the horizontal sand pond and the stirring mechanism are sequentially connected through pipelines, the cement bin is in butt joint with the feeding end of the stirring mechanism through the cement feeding mechanism, and the discharging end of the stirring mechanism is in butt joint with the self-sliding filling pipeline.
Specifically, cement feed mechanism includes electrohydraulic gate, double-barrelled screw feeder and the first spiral electronic scale of connecting in order.
Specifically, the stirring mechanism comprises a double-shaft stirrer, a high-speed activation stirrer and a filling hopper which are sequentially connected, wherein the first spiral electronic scale and the horizontal sand pool are both in butt joint with the double-shaft stirrer, and the filling hopper is in butt joint with the self-sliding filling pipeline.
Specifically, the filling hopper is arranged in the filling small well, and the self-sliding filling pipeline is arranged in the filling pipeline well.
Specifically, horizontal sand pool pass through put sand pipe with rabbling mechanism dock, put and be equipped with the tailing feeder hopper on the sand pipe, be connected with on the tailing feeder hopper and adjust dense water route.
Specifically, the overflow port of the deep cone thickener is connected with the backwater pool through a pipeline.
Specifically, the waste rock crushing system comprises a waste rock storage bin, a first vibration feeder, a No. 1 belt, a jaw crusher, a No. 2 belt, a vibrating screen, a No. 5 belt, a waste rock fine bin, a second vibration feeder and a No. 6 belt which are connected in sequence;
the discharge end butt joint of No. 6 belt and mixing system, the coarse fodder export of shale shaker is connected to compound breaker through No.3 belt, compound breaker's discharge gate is connected to through No. 4 belt No.2 belt.
Specifically, the stirring system comprises a continuous stirrer, a No. 6 belt is in butt joint with a feed inlet of the continuous stirrer, the self-sliding filling pipeline is in butt joint with the feed inlet of the continuous stirrer through a screw conveying feeder, and a water tank is further arranged on the feed inlet.
Specifically, the pumping filling system comprises an industrial filling pump and a pumping pipeline, wherein the pumping pipeline is in butt joint with a discharge port of the continuous mixer through the industrial filling pump.
Compared with the prior art, the invention has the beneficial effects that: the underground waste rock is crushed and mixed with slurry prepared by an original filling system, so that multistage matching of aggregate is realized, and cement does not need to be added underground; the filling is carried out in a pumping mode, the concentration and the strength of the filling can reach higher level (paste, paste-like), the mixed filling strength is ensured to meet the stability requirements of surrounding rock and ore bodies, the underground waste rock is utilized to the maximum extent, and the surface emission and the stockpiling of the waste rock are avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a device for preparing and pumping and filling waste rock and tailing mixed slurry according to an embodiment of the present invention;
FIG. 2 is a plan projection view of a waste rock crushing system according to an embodiment of the present invention;
FIG. 3 is a flow chart of a waste rock crushing process according to an embodiment of the invention;
FIG. 4 is a flow chart of a process for preparing a tailings cementitious slurry in accordance with an embodiment of the present invention;
Wherein: 1. a tailing pond; 2. tailing sand; 3. a slurry pump; 4. ceramic steel pipe; 5. deep cone thickener; 6. a pool; 7. a delivery conduit; 8. a horizontal sand pool; 9. a slurry making pipe; 10. a pneumatic pulping nozzle; 11. mortar; 12. an electric pinch valve; 13. a sand discharge pipe; 14. a tailings feed hopper; 15. a concentration adjusting waterway; 16. a cement bin; 17. cement; 18. an electrohydraulic gate; 19. a double-tube screw feeder; 20. a first spiral electronic scale; 21. a double-shaft stirrer; 22. activating the stirrer at a high speed; 23. filling a hopper; 24. filling a small well; 25. filling a pipe well; 26. self-sliding filling pipes; 27. waste stone; 28. waste rock storage bin; 29. a first vibratory feeder; 30. a No.1 belt; 31. jaw crusher; 32. a No. 2 belt; 33. a vibrating screen; 34. a No. 3 belt; 35. a composite crusher; 36. a No. 4 belt; 37. a No.5 belt; 38. waste rock fine bin; 39. waste stone fines; 40. a second vibratory feeder; 41. a No. 6 belt; 42. a control valve; 43. a screw conveyor feeder; 44. a second spiral electronic scale; 45. a water tank; 46. a continuous mixer; 47. an industrial filling pump; 48. and (3) pumping the pipeline.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Referring to fig. 1, a device for preparing and pumping and filling mixed slurry of waste stones and tailings comprises a slurry preparation system, a waste stone crushing system, a stirring system and a pumping and filling system, wherein the slurry preparation system is arranged on the ground surface and is used for preparing full-tailing cementing slurry, the waste stone crushing system, the stirring system and the pumping and filling system are all arranged underground, the waste stone crushing system is used for crushing waste stones underground, the slurry preparation system is in butt joint with a feeding end of the stirring system through a self-sliding filling pipeline 26, a discharging end of the waste stone crushing system is in butt joint with a feeding end of the stirring system, and the pumping and filling system is in butt joint with a mixture outlet of the stirring system.
In the embodiment, the full-tailing cemented slurry prepared by the slurry preparation system is conveyed into the stirring system through the self-sliding filling pipeline 26 under the action of self weight, the waste rock aggregate crushed by the waste rock crushing system also enters the stirring system, and after being uniformly stirred by the stirring system, the waste rock aggregate and the waste rock aggregate are pumped to stopes and other areas through the pumping filling system to be filled, so that multistage matching of the aggregate is realized, cement does not need to be added underground, the concentration and the strength of the full-tailing cemented slurry can reach higher level (paste and paste-like) through the pumping mode, the mixed filling strength is ensured to meet the stability requirements of surrounding rock and ore bodies, underground waste rock is utilized to the greatest extent, and the surface emission and stockpiling of the waste rock are avoided.
Referring to fig. 1, specifically, the slurry preparation system comprises a tailing pond 1, a slurry pump 3, a deep cone thickener 5, a horizontal sand pond 8 with a slurry making pipe 9 and a pneumatic slurry making nozzle 10, a stirring mechanism and a cement silo 16, wherein the tailing pond 1, the slurry pump 3, the deep cone thickener 5, the horizontal sand pond 8 and the stirring mechanism are sequentially connected through pipelines, the cement silo 16 is in butt joint with the feeding end of the stirring mechanism through the cement feeding mechanism, the discharging end of the stirring mechanism is in butt joint with a self-filling pipeline 26, the cement feeding mechanism comprises an electrohydraulic gate 18, a double-pipe spiral feeder 19 and a first spiral electronic scale 20 which are sequentially connected, the stirring mechanism comprises a double-shaft stirrer 21, a high-speed activation stirrer 22 and a filling hopper 23 which are sequentially connected, the first spiral electronic scale 20 and the horizontal sand pond 8 are in butt joint with the double-shaft stirrer 21, the filling hopper 23 is arranged in a filling small well 24, the self-sliding filling pipeline 26 is arranged in a filling pipeline well 25, the horizontal sand pond 8 is in butt joint with the stirring mechanism through a sand discharge pipe 13, the discharge hopper 13 is provided with the tailing hopper 14, and the overflow hopper 14 is connected with the deep water channel 6 through the overflow chute 15.
In the embodiment, tailings 2 in the surface tailings pond 1 are pressurized by a slurry pump 3 and conveyed to a deep cone thickener 5 of a filling station through a ceramic steel pipe 4, and underflow of the deep cone thickener 5 after adding an organic flocculant is automatically conveyed to a horizontal sand pond 8 of the filling station through a conveying pipeline 7 for storage. The overflow solid content of the thickener is less than 500ppm, and the thickener flows back to the water tank 6 through a pipeline for further clarification and then is recycled. The bottom of the horizontal sand pool 8 is provided with a plurality of rows of slurry making pipes 9, each row of slurry making pipes 9 is provided with 1 gas making nozzle 10 at intervals of about 1m, and the gas making pipes 9 valve in the horizontal sand pool 8 are used for gas making and the tail sand in the pool is used for gas making to manufacture mortar. After the whole tail sand in the pond is uniformly made, an electric pinch valve 12 at the bottom of the pond is opened to discharge sand through a sand discharge pipe 13, the sand discharge flow is detected by an electromagnetic flowmeter, the electric pinch valve 12 is used for adjusting, high-concentration whole tail mortar is placed into a tail sand feed hopper 14, concentration is adjusted by a concentration adjusting waterway 15, and the gamma-ray concentration meter is used for detecting.
Cement in the cement bin 16 is supplied to the mixer through an electrohydraulic gate 18 at the bottom, a double-pipe screw feeder 19 and a first screw electronic scale 20, the cement feeding amount is metered by the first screw electronic scale 20, and the cement feeding amount can be adjusted by changing the rotating speed of the double-pipe screw feeder 19 so as to meet the filling slurry proportioning requirement. The high-concentration full-tail mortar 11 and cement 17 are continuously supplied to the stirrer through respective feeding lines, and are continuously stirred sequentially by two sections comprising a double-shaft stirrer 21 and a high-speed activation stirrer 22, so that filling slurry in a structural flow state is prepared, and is discharged into a filling hopper 23 on a filling small well 24 through a discharging pipe, and then is self-flowed and conveyed into the well through a self-flowing filling pipeline 26 in a filling pipeline well 25.
Referring to fig. 1 and 2, in some possible embodiments, the waste rock crushing system includes a waste rock storage bin 28, a first vibratory feeder 29, a No.1 belt 30, a jaw crusher 31, a No. 2 belt 32, a vibrating screen 33, a No. 5 belt 37, a waste rock fine bin 38, a second vibratory feeder 40, and a No. 6 belt 41,6 belt 41 connected in sequence, with a coarse material outlet of the vibrating screen 33 being connected to a composite crusher 35 by a No.3 belt 34, and a discharge outlet of the composite crusher 35 being connected to a No. 2 belt 32 by a No. 4 belt 36.
In the embodiment, the waste stones 27 generated by underground mining are conveyed to a waste stone storage bin 28 (coarse material) for waste stone storage and buffering, the waste stones 27 in the waste stone storage bin 28 are lowered to a No. 1 belt 30 through a first vibration feeder 29, a jaw crusher 31 is positioned below the No. 1 belt 30 and receives the feeding materials of the No. 1 belt, and crushed broken stones are discharged to a No. 2 belt 32; the vibrating screen 33 is positioned under the No. 2 belt 32, receives the material from the No. 2 belt 32, and the crushed stone screen is discharged onto the No. 3 belt 34 and conveyed to the composite crusher 35 for continuous crushing; the undersize crushed stone is discharged onto a No. 5 belt 37 and conveyed to a fine bin. The compound crusher 35 is positioned under the No. 3 belt 34, receives the material supplied by the No. 3 belt 34, and crushed broken stone is transported to the No. 2 belt 32 by the No. 4 belt 36, and is screened and transported again through the vibrating screen 33, so that two-stage closed circulation of a crushing system is formed, and the particle size of crushed waste stone is ensured to be not more than 20mm.
Referring to fig. 1, in some possible embodiments, the stirring system comprises a continuous mixer 46,6 with a belt 41 interfacing with the inlet of a continuous mixer 46, a self-sliding filling pipe 26 interfacing with the inlet of the continuous mixer 46 through a screw conveyor feeder 43, a water tank 45 provided on the inlet, and a pumping filling system comprising an industrial filling pump 47 and a pumping pipe 48 interfacing with the outlet of the continuous mixer 46 through the industrial filling pump 47.
In this embodiment, the waste fine materials 39 in the waste fine material bin 38 are conveyed to a continuous mixer 46 through a second vibration feeder 40 and a No. 6 belt 41, the filling slurry prepared on the surface is conveyed to a screw conveyor feeder 43 through a control valve 42 at the bottom of the self-sliding filling pipeline 26, then conveyed to the continuous mixer 46 through a second screw electronic scale 44 according to concentration proportioning, meanwhile, water is added and adjusted according to concentration by a water tank 45, after the tailing cement slurry and the waste are uniformly stirred by the continuous mixer 46, the tailing cement slurry and the waste are placed in an underlying industrial filling pump 47, and then the waste tailing cementing filling slurry is pumped to a stope and other areas through a pumping pipeline 48 for filling. The continuous mixer 46 may be a concrete mixer or the like.
Referring to fig. 3 and 4, the process of preparing and pumping and filling the waste rock and tailing mixed slurry by using the filling device in the embodiment is used for comprehensively determining the unconfined uniaxial compressive strength required by the filling body by means of numerical simulation or field test according to the engineering geological conditions and mining methods, the stope structural parameters, the bottom structural arrangement form, rock drilling and ore drawing equipment and other conditions aiming at the areas needing to be filled in the categories; according to the required uniaxial compressive strength, the optimal proportion of the mixed filling material is obtained through an indoor filling material strength proportion experiment, and a basis is provided for tailing slurry preparation, waste rock amount measurement, slurry stirring and concentration control. The proportioning scheme can be designed by adopting methods such as orthogonal experiments, and the like, and 4-5 groups of slurry concentrations are selected.
The underground waste rock crushing system and the stirring pumping filling system are used for selecting a site meeting the requirements of pumping service level distance and height Cheng Geli according to the current mine production situation and roadway arrangement situation, and the waste rock is convenient to transport and is well and suitable in ventilation condition of a crushing site. The waste rock storage bin 28 (coarse material) is mainly used for storing and buffering waste rock, and the volume of the waste rock storage bin is designed according to the underground waste rock mixed filling demand and the capacity of a crushing system, and can be built by utilizing the original mine engineering such as a courtyard and the like. After the waste stones in the storage bin are crushed for the first time by the jaw crusher 31, the waste stones meeting the particle size requirements are directly transported to the waste stone fine bin 38 for storage, the waste stones with the particle size larger than the required particle size after screening are transported to the composite crusher 35 for continuous crushing, crushed stones are screened and transported by the vibrating screen 33 again, and two-stage closed cycle of the crushing system is formed.
The tailings in the sand pool of the earth surface filling station are conveyed to a high-efficiency deep cone thickener 5 in a pressurizing way through a slurry pump 3, underflow of the high-efficiency deep cone thickener 5 automatically flows into a horizontal sand pool 8 of the filling station through a conveying pipe to be stored and subjected to air compression slurry making, and after the overall slurry making is uniform, high-concentration full-tail mortar is supplied to a stirrer; cement in the cement bin 16 is conveyed to a stirrer to be mixed and stirred with mortar after being metered by a feeder and a spiral electronic scale, and enters a high-speed activation stirrer 22 to be stirred at a high speed after preliminary stirring, and the prepared filling slurry is placed into a filling hopper 23 and then automatically conveyed to the underground through a filling pipeline.
The crushed waste rock fine materials are conveyed to a stirrer through a belt, and filling slurry prepared on the surface of the ground is conveyed to the stirrer through a bottom control valve 42 according to concentration proportioning, and meanwhile water is added according to concentration requirements for adjustment. An industrial filling pump 47 is positioned below the mixer to receive the mixed filling material from the mixer and pump it to stopes and other areas for filling. The filling operation flow comprises the following steps: inspection preparation, pipe water filling (lubrication pipe), mortar pushing (water in the pipe is discharged and the pipe is further lubricated), mixed slurry pushing mortar, filling operation, mortar pushing mixed slurry (after filling operation), water pushing mortar (pipe cleaning), and finishing.
According to the invention, an underground waste rock crushing system is constructed, and is mixed with filling slurry provided by an existing full-tailing cemented filling system of a mine by stirring, so that a fixed or movable comprehensive process system for pumping and filling is finally realized, the strength of the high-concentration mixed filling slurry of waste rock and tailing slurry is ensured to meet the requirements of special filling objects, the original common concrete filling is replaced, the mine is safely and efficiently exploited, the transportation and lifting cost of mine waste discharged to the ground surface is greatly reduced, and the environmental negative effect caused by waste rock stacking is avoided.
The specific process comprises the following steps:
a. Determining the required strength of a casting surface of a layered filling body for a special area, such as an artificial bottom column, a top column or a mining column or a stope, for walking by a scraper: according to geological conditions and mining methods of mine engineering, the uniaxial compressive strength required by the filling body is comprehensively determined by combining the parameters of a stope structure, the arrangement form of a bottom structure, rock drilling, ore drawing equipment and other conditions through a numerical simulation or field test method, and 6MPa is adopted in the scheme.
B. mixing and filling materials of waste stone and tailing: the aggregate of the mixed filling material is crushed waste stone and tailings, the particle size of the waste stone is generally not more than 20mm, the tailings are all tailings, the cementing material is ordinary Portland cement, and the other materials are water. By designing a multi-factor proportioning experimental scheme of 4 materials, an indoor test is carried out, and the flow characteristic, bleeding rate and unconfined compressive strength of the filler are used as performance indexes of the filler slurry, wherein the compressive strength is measured for 3 days, 7 days, 14 days and 28 days, and the compressive strength reaches 80% of the required strength in 7 days. The optimal proportion of the mixed filling material is obtained through experiments.
Specifically, in this embodiment, an orthogonal test method is adopted, and the concentration of the mixed slurry of factor a is selected to be 75%, 77%, 79%, 81% and 83% respectively; factor B gray to sand ratio is 1:4, 1:5, 1:6, 1:7; factor C waste rock to tailings ratio is 2:8, 3:7, 4:6, 5:5, 6:4, 7:3, 8:2; pumping agent D, 0%, 0.5%, 1.0%, 2.0%. The 4 factor 7 level orthogonal test is adopted, the flow characteristic, bleeding rate and compressive strength of the filler are used as performance indexes of the mixed slurry, wherein the compressive strength is measured for 3 days, 7 days, 14 days and 28 days, and the optimal material proportion is obtained through the indoor test.
C. transferring, storing and crushing waste stones: conveying the waste rocks generated by underground mining to a storage bin (coarse material) for storage and buffering, avoiding influencing the operation of crushing equipment because the waste rocks are not transported, or influencing the waste rocks transportation because of the fault of the crushing equipment, and designing the volume of the storage bin according to the underground waste rock mixed filling demand and the capacity of a crushing system.
Establishing a waste stone crushing system, discharging waste stone of a storage bin to a No. 1 belt 30 through a chute, arranging a jaw crusher 31 on a No. 2 belt 32 for receiving the crushed stone from the No. 1 belt 30; the vibrating screen 33 is positioned under the No. 2 belt 32, receives the material from the No. 2 belt 32, and the crushed stone screen is discharged onto the No. 3 belt 34 and conveyed to the composite crusher 35 for continuous crushing; the undersize crushed stone is discharged onto a No. 5 belt 37 and conveyed to a fine bin. The compound crusher 35 is positioned under the No. 3 belt 34, receives the material from the No. 3 belt 34, and the crushed stone is transported to the No. 2 belt 32 by the No. 4 belt 36, and forms a closed cycle of the crushing system together with the vibrating screen 33.
D. preparing and conveying tailing slurry: the tailings in the surface tailings pond 1 are conveyed into a high-efficiency deep cone thickener 5 of a filling station in a pressurizing way through a slurry pump 3, and underflow of the high-efficiency deep cone thickener 5 automatically flows into a horizontal sand pond 8 of the filling station through a conveying pipe for storage; the valve of the air compressing pulping pipe 9 in the horizontal sand pool 8 compresses air and makes pulp for the tailings in the pool through the nozzle, after the pulp is made uniformly for the whole tailings in the pool, the electric pinch valve 12 at the bottom of the pool is opened to supply high-concentration whole-tail mortar to the stirrer; cement in the cement bin 16 is metered by a feeder and a spiral electronic scale and then is conveyed to a stirrer to be mixed and stirred with mortar, and after preliminary stirring, the cement enters a high-speed activation stirrer 22 to be stirred at a high speed, so that filling slurry in a structural flow state is prepared, and is discharged into a filling hopper 23 on a filling small well 24 through a discharging pipe and then is automatically conveyed to the underground through a filling pipeline.
E. Mixing and pumping filling slurry of terminal waste rock and tail sand, and filling: the crushed waste rock fine materials are conveyed to a stirrer through a No. 6 belt 41, and filling slurry prepared on the surface of the ground is conveyed to the stirrer through a bottom control valve 42 according to concentration proportion, and meanwhile water is added according to concentration requirements for adjustment. An industrial filling pump 47 is positioned below the mixer to receive the mixed filling material from the mixer and pump it to stopes and other areas for filling.
The invention is suitable for goaf filling, constructing high-strength artificial roof and bottom columns and studs, filling roof grafting, mining stope casting surfaces by a layered filling method and filling other areas with higher requirements on the strength of the filling body when surrounding rock crushing, branching and compounding small ore veins and dispersed ore bodies are mined, can be used as a beneficial supplement when an original filling system of a mine cannot meet the filling requirement, and can be used as a beneficial supplement when the self-flow conveying is difficult, and when a movable industrial pump is adopted for pumping filling, the filling mode is more flexible, simpler and efficient, the labor intensity of workers and the production cost are effectively reduced, and the application range is very wide.
Any of the above-described embodiments of the present invention disclosed herein, unless otherwise stated, if they disclose a numerical range, then the disclosed numerical range is the preferred numerical range, as will be appreciated by those of skill in the art: the preferred numerical ranges are merely those of the many possible numerical values where technical effects are more pronounced or representative. Since the numerical values are more and cannot be exhausted, only a part of the numerical values are disclosed to illustrate the technical scheme of the invention, and the numerical values listed above should not limit the protection scope of the invention.
Meanwhile, if the above invention discloses or relates to parts or structural members fixedly connected with each other, the fixed connection may be understood as follows unless otherwise stated: detachably fixed connection (e.g. using bolts or screws) can also be understood as: the non-detachable fixed connection (e.g. riveting, welding), of course, the mutual fixed connection may also be replaced by an integral structure (e.g. integrally formed using a casting process) (except for obviously being unable to use an integral forming process).
The above examples are only illustrative of the invention and are not intended to be limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. Nor is it necessary or impossible to exhaust all embodiments herein. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (1)
1. The utility model provides a waste rock and tail sand mixed slurry preparation and pump sending filling device which characterized in that: comprises a slurry preparation system, a waste stone crushing system, a stirring system and a pumping filling system;
The slurry preparation system is arranged on the ground surface, the waste rock crushing system, the stirring system and the pumping filling system are all arranged underground, the slurry preparation system is in butt joint with the feeding end of the stirring system through a self-sliding filling pipeline (26), the discharging end of the waste rock crushing system is in butt joint with the feeding end of the stirring system, and the pumping filling system is in butt joint with the mixture outlet of the stirring system;
Wherein the slurry preparation system is used for preparing all-tailing cementing slurry, and the waste rock crushing system is used for crushing underground waste rock (27);
The slurry preparation system comprises a tailing pond (1), a slurry pump (3), a deep cone thickener (5), a horizontal sand pond (8) with a slurry making pipe (9) and an air compression slurry making nozzle (10), a stirring mechanism and a cement bin (16);
The tailing pond (1), the slurry pump (3), the deep cone thickener (5), the horizontal sand pond (8) and the stirring mechanism are sequentially connected through pipelines, the cement bin (16) is in butt joint with the feeding end of the stirring mechanism through a cement feeding mechanism, and the discharging end of the stirring mechanism is in butt joint with the self-sliding filling pipeline (26);
the cement feeding mechanism comprises an electrohydraulic gate (18), a double-pipe screw feeder (19) and a first screw electronic scale (20) which are connected in sequence;
the stirring mechanism comprises a double-shaft stirrer (21), a high-speed activation stirrer (22) and a filling hopper (23) which are sequentially connected, the first spiral electronic scale (20) and the horizontal sand pool (8) are both in butt joint with the double-shaft stirrer (21), and the filling hopper (23) is in butt joint with the self-sliding filling pipeline (26);
the filling hopper (23) is arranged in a small filling well (24), and the self-sliding filling pipeline (26) is arranged in a filling pipeline well (25);
The horizontal sand pool (8) is in butt joint with the stirring mechanism through a sand discharge pipe (13), a tailing feed hopper (14) is arranged on the sand discharge pipe (13), and a concentration adjusting waterway (15) is connected to the tailing feed hopper (14);
the overflow port of the deep cone thickener (5) is connected with the backwater pool (6) through a pipeline;
The waste rock crushing system comprises a waste rock storage bin (28), a first vibration feeder (29), a No.1 belt (30), a jaw crusher (31), a No. 2 belt (32), a vibrating screen (33), a No. 5 belt (37), a waste rock fine bin (38), a second vibration feeder (40) and a No.6 belt (41) which are connected in sequence;
The No. 6 belt (41) is in butt joint with the discharge end of the stirring system, a coarse material outlet of the vibrating screen (33) is connected to the composite crusher (35) through a No. 3 belt (34), and the discharge port of the composite crusher (35) is connected to the No. 2 belt (32) through a No. 4 belt (36);
The stirring system comprises a continuous stirrer (46), the No. 6 belt (41) is in butt joint with a feed inlet of the continuous stirrer (46), the self-sliding filling pipeline (26) is in butt joint with the feed inlet of the continuous stirrer (46) through a spiral conveying feeder (43), and a water tank (45) is further arranged on the feed inlet;
the pumping and filling system comprises an industrial filling pump (47) and a pumping pipeline (48), wherein the pumping pipeline (48) is in butt joint with a discharge hole of the continuous mixer (46) through the industrial filling pump (47).
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| CN113263622B (en) * | 2021-06-16 | 2022-05-20 | 东北大学 | Continuous slurry preparation system and method suitable for dry-pile tailings and capable of accurately controlling concentration |
| CN113509995B (en) * | 2021-07-28 | 2023-11-17 | 烟台杰瑞石油装备技术有限公司 | Goaf filling equipment and goaf filling method |
| CN114165280A (en) * | 2021-11-03 | 2022-03-11 | 李龙清 | Column type goaf filling reconstruction coal seam comprehensive mechanical stoping method |
| CN114294056A (en) * | 2021-12-14 | 2022-04-08 | 万宝矿产有限公司 | Open pit treatment method combining waste rock and dry tailings |
| CN114474406A (en) * | 2022-02-18 | 2022-05-13 | 中冶沈勘工程技术有限公司 | High-concentration full-tailing cemented filling system |
| CN114474408A (en) * | 2022-03-09 | 2022-05-13 | 兰州有色冶金设计研究院有限公司 | High-concentration paste manufacturing system and production method thereof |
| CN115521095A (en) * | 2022-09-19 | 2022-12-27 | 安徽金安矿业有限公司 | Rapid preparation method of concrete for underground guniting support of metal mine |
| CN117417165A (en) * | 2023-10-30 | 2024-01-19 | 温州二井建设有限公司个旧分公司 | Goaf backfill concrete and concrete backfill system |
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