WO1999047755A1 - Procede de depot de materiaux a teneur en humidite, avec consolidation, sur le site de depot - Google Patents

Procede de depot de materiaux a teneur en humidite, avec consolidation, sur le site de depot Download PDF

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Publication number
WO1999047755A1
WO1999047755A1 PCT/JP1998/005119 JP9805119W WO9947755A1 WO 1999047755 A1 WO1999047755 A1 WO 1999047755A1 JP 9805119 W JP9805119 W JP 9805119W WO 9947755 A1 WO9947755 A1 WO 9947755A1
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WO
WIPO (PCT)
Prior art keywords
consolidation
deposition
water
particle size
area
Prior art date
Application number
PCT/JP1998/005119
Other languages
English (en)
Japanese (ja)
Inventor
Seishi Yamada
Original Assignee
Toyoha Mining Co. Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyoha Mining Co. Ltd. filed Critical Toyoha Mining Co. Ltd.
Priority to AU10532/99A priority Critical patent/AU1053299A/en
Publication of WO1999047755A1 publication Critical patent/WO1999047755A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting
    • E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains

Definitions

  • the present invention relates to a method for consolidating and depositing water-containing substances in a sedimentation yard, and more particularly to a method for separating ore containing waste, which is generated in a large amount in a flotation process for separating useful minerals from ores collected in a mine.
  • the present invention relates to a consolidation method in a dumping site to be disposed.
  • FIG 4 is a flow chart showing an example of a preferential flotation system for complex sulfide ores.
  • a mixed concentrate of Cu-Pb is recovered by flotation, leaving ⁇ , iron sulfide and gangue in the tailings, and then (: !!! and ⁇ , respectively).
  • Flotation separation of iron sulfide and gangue Mineral liquor containing a large amount of waste slag generated in the flotation process is classified by cyclone 40 as shown in Fig. 5 Dams larger than the diameter are supplied above the levee 42 to grow the levee, while mineral effluent containing waste hulls smaller than the specified particle size is supplied to the dam area 44 and / or dam formed by the levee.
  • Table 1 shows the particle size distribution of the mineral liquor supplied to the cyclone 40, the underflow 40a and the overflow 40b of the cyclone 40
  • the underflow of cyclone 40 a which is about 78% of waste with a particle size of 20 mm or more, Cyclone overflow 4 Ob, which is supplied above 42 and has a particle size of less than 200 mesh and is about 92% waste, is located in dam reservoir area 44 and Z or dam reservoir area 4 6 Supplied to
  • the sedimentation site will be full in 5 years.
  • the mine had no place to dump mineral liquor unless a new dump was created, and had to be closed.
  • the cost of several hundred million yen is required to reinforce the embankment, with the height of the embankment being 1 m.
  • a specified thickness is applied to the surface of the sediment in the dam reservoir area 44 and the no or dam reservoir area 46. It is also conceivable to lay sand with a large particle size on the sand and use this sand layer as the drain layer. When the wastewater containing wastewater is disposed above the drain layer, water is quickly removed through the drain layer. Therefore, only the waste will be deposited, and the weight will compress the sediment and the deposition rate will decrease at each stage.
  • this method has a disadvantage that a large amount of sand is required, and a small particle size waste gets into the sand, so that the drain effect is quickly eliminated.
  • An object of the present invention is to solve the above-mentioned problems of the prior art, and to simply and inexpensively maintain the drainage property of a substance containing water in a good manner while maintaining good drainage properties, thereby consolidating the deposition portion, and preventing liquefaction as a ripple effect. It is an object of the present invention to provide a method of compacting and depositing a substance containing water, which can further increase the seismic strength.
  • Another object of the present invention is to provide a method for compacting sediment in a deposition site of a substance containing water, which can compress the sediment through compaction of the depositing part and thereby reduce the deposition rate. .
  • the object of the present invention is to further improve the foundation ground of the construction site for ore slag containing wastewater to be constructed in depopulated mountainous areas in a short period of time, and to supply large-area flat areas that can be effectively used to the area. It is an object of the present invention to provide a method for compacting and depositing a substance containing moisture, which can be performed in a deposition field.
  • the present invention for solving the above-mentioned problems is as follows.In a deposition site for a substance containing water, a horizontal drain member is disposed in a place where the upper layer is or should be an aqueous phase, and a substance containing water is successively deposited on the horizontal drain member. Provided is a method for compacting and depositing a substance containing water, which is characterized in that the depositing portion is compacted while maintaining good drainage properties.
  • a plurality of vertical drain members are laid at predetermined intervals on the already-deposited sediment. The upper end is connected to the horizontal drain member.
  • waste containing a large amount of water-containing substances is generated in a flotation process for separating useful minerals from ores collected in a mine.
  • Mineral liquor that contains slag and that contains sewage in the sedimentation site is classified and the sewage with a specified particle size or more is supplied above the levee to grow the levee.
  • the method is characterized in that the mineral liquor containing waste slag having a predetermined particle size or less is disposed of in the dam reservoir area and the Z or dam reservoir area formed by the embankment.
  • the invention according to claim 4 is the method according to claim 3, wherein the consolidation method comprises the steps of: A horizontal drain member is placed on top of which wastewater containing wastewater with a particle size of less than a specified size is discarded, and wastewater with a size of less than a specified size is deposited, thereby consolidating the deposited area while maintaining good drainage. It is characterized in that
  • a fifth aspect of the present invention in the method of compacting and depositing according to the fourth aspect, when the horizontal drain member is disposed, waste having a predetermined particle size or less that has already been deposited in the dam reservoir area and / or the dam water storage area.
  • a plurality of vertical drain members are laid at predetermined intervals in a stacking portion, and the upper ends thereof are connected to a horizontal drain member.
  • the invention according to claim 6 is the method according to claim 4 or 5, wherein after the height of the embankment body reaches a predetermined height, the mineral liquor is transferred to the dam reservoir area and / or the dam storage area. Stopping disposal, improving drainage using horizontal drain members and consolidating the sedimentation area in a short period of time to improve the foundation ground in that area, and leveling the surface to effectively utilize depopulated mountain areas It is characterized by supplying the largest possible flat area.
  • the invention according to claim 7 is characterized in that, in the consolidation deposition method according to claim 6, as the earth and sand used for the formation, waste having a predetermined particle size or more obtained by classification is used.
  • waste having a predetermined particle size or more obtained by classification is used.
  • As the surface covering sediment after the completion of the sedimentation drain water in the horizontal direction using wastewater with a good permeability and a predetermined particle size in the area to be constructed.
  • the invention according to claim 8 is a method according to any one of claims 1 to 7, wherein the horizontal drain member is formed of a pair of upper and lower synthetic fibers or a synthetic resin.
  • a paddle made of a belt-shaped surface member and a plastic core plate material embossed in an uneven shape having a water passage that is mounted inside and has a water passage therethrough. It is characterized by comprising a member.
  • FIG. 1 is a schematic cross-sectional view showing a deposition site for discarding ore liquor containing waste slag generated in a large amount in a flotation process for implementing the compaction deposition method according to the present invention.
  • FIG. 2 is a plan view of the deposition site of FIG.
  • FIG. 3 is a schematic perspective view of a paper drain member used when performing the compaction deposition method according to the present invention.
  • FIG. 4 is a flow chart showing an example of a preferential flotation system for complex sulfide ores.
  • FIG. 5 is a schematic cross-sectional view showing a conventional dumping site for ore liquor disposal.
  • FIG. 1 and FIG. 2 are a schematic cross-sectional view and a plan view, respectively, showing a deposition site for discarding a mineral liquor containing a large amount of wastewater generated in a flotation process for implementing the compaction deposition method according to the present invention.
  • the state shown in the figure is a stage where the dam reservoir 4 and the dam reservoir 6 have been formed to some extent inside the embankment 2.
  • a paper drain member 10 with a width of about 1 m and a length of about 8 Om Install in parallel at O m intervals.
  • the paddle member 10 is composed of a pair of upper and lower synthetic fibers or a water-permeable belt-like surface member 12 made of a synthetic resin, and a plastic-made member mounted on the inside. It consists of a core plate material 14. A large number of concave-convex embossments 14a, 14b are formed in the core plate member 14, and a water passage 14c for allowing water to pass through the gap is formed.
  • a variety of paddle members 10 are commercially available. For example, there is a public drain (trade name) manufactured by Asahi Engineering Co., Ltd., located at 41-118 Konan, Minato-ku, Tokyo.
  • the pair of upper and lower strip-shaped surface members 12 are independent members, and the forces connecting the edges are of course independent. Of course, they are formed in a cylindrical shape so that the core plate member 14 is inserted therein. May be.
  • the end of the paper drain member 10 on the dam reservoir area 6 side is designed to prevent clogging caused by waste Therefore, it is preferable that the sealing is performed by an appropriate means.
  • a predetermined interval e.g., 10 m in the horizontal and vertical directions, is provided in the sedimentation portion having a predetermined particle size or less, which has already been accumulated in the dam reservoir 4 and / or the dam reservoir 6.
  • a plurality of vertical drain members 20 are laid.
  • the vertical drain member 20 is made of metal, has a conical sharp tip at the lower end, and has a number of lateral holes. Since the sediment in this region is sludge and the force required for driving is not so large, the vertical drain member 20 may be made of plastic. As will be described later, by performing the method of the present invention, the sediment above the level where the paper drain member 10 is installed is compressed to increase the density.
  • the deposition rate of the deposit becomes lower in each step as compared with the conventional method.
  • the height of the must be increased to 1 year hear embankment 2 is lower in each stage having a correspondingly cost power s cheaper further advantage.
  • the total amount of waste that can ultimately be deposited can be dramatically increased, prolonging the life of the mine.
  • the disposal of the mineral liquor into the dam reservoir 4 and / or the dam reservoir 6 is stopped.
  • a dam reservoir area 4 and / or a dam reservoir area 6 are formed inside the embankment body 2, but drainage is performed in a short period of time using the paper drain member 10.
  • the consolidation is performed in a short period of time at the sediment, and the foundation ground in that area is improved.
  • by leveling the surface it will be possible to supply a large area of flat land that can be effectively used in mountainous depopulated areas with little flat land.
  • the method of the present invention generally comprises a step of arranging a horizontal drain member at a location where an upper layer of a deposition site of a water-containing substance is or should be an aqueous phase, and further comprising a water component thereon. And a step of consolidating the sedimented parts while maintaining good drainage by successively accumulating substances.
  • the method of the present invention can be carried out after a certain amount of sediment has been deposited at the deposition site, or the present invention method can be carried out from a state where there is no deposit at the deposition site.
  • the method of the present invention When the method of the present invention is carried out after a certain amount of sediment has been deposited at the deposition site, a plurality of vertical drain members are laid at predetermined intervals on the already-deposited sediment, and the upper end thereof is connected to the horizontal drain member. Power is preferable.
  • the method of the present invention has an advantage that it can be applied to an existing depot. Further, by doing so, the deposits above and below the level where the horizontal drain member is installed can be compressed, and the deposition rate of the deposits can be made smaller in each step as compared with the conventional method.
  • the method of the present invention can be applied to a sedimentation yard that discards ore liquid containing a large amount of waste generated in a flotation process in which useful minerals are sorted out from ores collected in a mine.
  • the mineral liquor is classified by the cyclone 3, and the waste 3a having a predetermined particle size or more is supplied above the bank 2 to grow the bank 2 ( The dashed line is shown in Fig. 1.
  • the mineral liquor 3b containing wastewater having a predetermined particle size or less is transferred to the dam reservoir 4 and Z or dam reservoir 6 formed by the embankment. It can be discarded. Without transporting sediment, etc. from other areas, as the water level rises in the Dam Reservation Area 4 and Z or the Dam Reservoir 6, the embankment 2 constructed with wastewater of a predetermined grain size or higher is gradually raised. can do.
  • a horizontal drain member is placed on the surface of the sedimentation area that is already deposited in the dam reservoir area 4 and / or dam reservoir area 6 and is smaller than the specified particle size.
  • a plurality of vertical drain members 20 can be laid at predetermined intervals in a previously deposited pile of waste particles having a predetermined particle size or less, and the upper ends thereof can be connected to the horizontal drain members.
  • the final embankment height will be 14 years.
  • the natural settlement amount can be suspended by 3.3 m, and the mineral liquor can be discarded for about 17 years in total.
  • a settlement amount of 8.4 mS can be expected due to the consolidation, and the mineral liquor can be continuously discarded for a total of 22 years. Therefore, there is an advantage that the period in which about 5 m of ore solution can be discarded is extended.
  • the economic effect is that the unused land becomes more useful due to the expanded use of the site, the land price rises, and the capacity of the dumping area increases. If this price is estimated as the construction cost for reinforcing the dump, it will be approximately 110 million yen. In addition, the life of the mine can be extended by about seven years, producing about 400,000 tonnes of ore.
  • the supernatant water of the sedimentation site is repeatedly used as the water for beneficiation, but the method of the present invention may increase the amount of recovered supernatant water. it can. Therefore, the cost for new water supply such as well drilling can be reduced.
  • the residual reagent contained in the supernatant water is recovered, there is an advantage that the cost of reagents at the ore treatment plant can be reduced.
  • the method of the present invention by applying the method of the present invention to an old abolished mine, the amount of treated water is reduced, the cost of water treatment is reduced, and the function of preventing mine pollution can be improved.
  • the ground in the area is improved in a short period of time by drainage using the horizontal drain member and consolidation in the accumulation part. Further, By leveling the surface, it is possible to supply large areas of flat land that can be effectively used in depopulated mountainous areas.
  • a horizontal drain member As a horizontal drain member, a water-permeable band-shaped surface member 12 made of a pair of upper and lower synthetic fibers or synthetic resin, and a plastic core embossed in an uneven shape having a water passage mounted inside and allowing water to pass inside.
  • a paper drain member 10 composed of the plate material 14 can be used. It has the advantage of being cheap and having only one sexual ability.
  • a horizontal drain member In the consolidation deposition method according to the present invention, in a deposition site for a substance containing water, a horizontal drain member is disposed at a location where the upper layer is or should be an aqueous phase, and a substance containing moisture is successively placed on the horizontal drain member. Since the sediment is deposited, it has an effect that the accumulation part can be compacted easily and inexpensively while maintaining good drainage.
  • the method of the present invention also has the effect of compressing the sediment through consolidation of the sediment, thereby prolonging the life of the sediment field.
  • the method of the present invention can further improve the foundation ground of a sewage-containing ore sewage field built in a mountainous depopulated area in a short period of time, and can supply a large-area flat area that can be effectively used to the area. Has an effect.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Treatment Of Sludge (AREA)

Abstract

Cette invention se rapporte à un procédé de dépôt de matériaux à teneur en humidité, avec consolidation, sur le site de dépôt, ce procédé consistant à disposer des drains horizontaux (10) au niveau de parties où la couche supérieure forme ou s'apprête à former une partie en phase aqueuse, à déposer l'un après l'autre les matériaux à teneur en humidité sur les drains (10) et à consolider la partie de dépôt, tout en maintenant la capacité de drainage à un niveau élevé. Ce procédé entraîne la compression du dépôt par consolidation de la partie de dépôt et, ainsi, le prolongement de la durée de vie du site de dépôt. Ce procédé entraîne en outre l'amélioration en un temps court des fondations d'un site de dépôt de déchets de laitier en une seule solution, construit dans des zones non peuplées de régions montagneuses, et ce procédé permet de former un terrain plat d'une grande superficie pouvant être utilisé efficacement. Grâce à cette invention, la partie de dépôt peut être consolidée, alors que la capacité du site des dépôts à drainer les matériaux à teneur en humidité est maintenue à un niveau élevé.
PCT/JP1998/005119 1998-03-16 1998-11-13 Procede de depot de materiaux a teneur en humidite, avec consolidation, sur le site de depot WO1999047755A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU10532/99A AU1053299A (en) 1998-03-16 1998-11-13 Consolidation deposition method of materials containing moisture at deposition site

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10/82404 1998-03-16
JP10082404A JPH11256562A (ja) 1998-03-16 1998-03-16 水分を含む物質の堆積場における圧密化堆積方法

Publications (1)

Publication Number Publication Date
WO1999047755A1 true WO1999047755A1 (fr) 1999-09-23

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PCT/JP1998/005119 WO1999047755A1 (fr) 1998-03-16 1998-11-13 Procede de depot de materiaux a teneur en humidite, avec consolidation, sur le site de depot

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JP (1) JPH11256562A (fr)
AU (1) AU1053299A (fr)
PE (1) PE20000208A1 (fr)
WO (1) WO1999047755A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01121410A (ja) * 1987-11-02 1989-05-15 Taihei Shoko Kk 軟弱地盤の垂直ドレーン打設工法
JPH02136419A (ja) * 1988-11-15 1990-05-25 Kajima Corp 人工島の地盤改良工法
JPH0313617A (ja) * 1989-06-08 1991-01-22 Daito Kogyo Kk 海底における水平ドレーン工法
JPH03147920A (ja) * 1989-11-06 1991-06-24 Penta Ocean Constr Co Ltd ドレーン材の水平埋設方法及びその埋設装置
JPH03151411A (ja) * 1989-11-09 1991-06-27 Chiyoda Corp プラスチックボードドレーンの打設工法
JPH05230823A (ja) * 1992-02-18 1993-09-07 Penta Ocean Constr Co Ltd 超軟弱地盤改良用水平ドレーン材敷設方法
JPH0813466A (ja) * 1994-06-29 1996-01-16 Daito Kogyo Kk 水底における水平ドレーン材の敷設装置及び敷設工法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2524224Y2 (ja) * 1991-02-27 1997-01-29 東急建設株式会社 水平排水材
JP3648299B2 (ja) * 1995-10-24 2005-05-18 若築建設株式会社 軟弱地盤の圧密促進工法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01121410A (ja) * 1987-11-02 1989-05-15 Taihei Shoko Kk 軟弱地盤の垂直ドレーン打設工法
JPH02136419A (ja) * 1988-11-15 1990-05-25 Kajima Corp 人工島の地盤改良工法
JPH0313617A (ja) * 1989-06-08 1991-01-22 Daito Kogyo Kk 海底における水平ドレーン工法
JPH03147920A (ja) * 1989-11-06 1991-06-24 Penta Ocean Constr Co Ltd ドレーン材の水平埋設方法及びその埋設装置
JPH03151411A (ja) * 1989-11-09 1991-06-27 Chiyoda Corp プラスチックボードドレーンの打設工法
JPH05230823A (ja) * 1992-02-18 1993-09-07 Penta Ocean Constr Co Ltd 超軟弱地盤改良用水平ドレーン材敷設方法
JPH0813466A (ja) * 1994-06-29 1996-01-16 Daito Kogyo Kk 水底における水平ドレーン材の敷設装置及び敷設工法

Also Published As

Publication number Publication date
JPH11256562A (ja) 1999-09-21
AU1053299A (en) 1999-10-11
PE20000208A1 (es) 2000-03-17

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