JPH11256562A - Consolidation accumulating method for use at accumulation site for water-bearing material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a consolidation accumulating method for use at an accumulation site for water-bearing materials, whereby an accumulating part can be consolidated easily at low cost while the drainage of the accumulation site for the water-bearing materials is kept good. SOLUTION: A consolidation accumulating method for use at an accumulation site for water-bearing materials involves placing a horizontal draining member 10 at a portion whose upper layer is or shoed be a water phase part, at the accumulation site for the water-bearing materials, and accumulating water- bearing materials thereon in succession to consolidate an accumulating part while keeping drainage good. The accumulated materials are compressed through the consolidation of the accumulating part, thereby enables extension of the life of the accumulation site. Further, the foundation ground of an accumulation site for ore solutions including wastes, which is constructed in a mountainous depopulated area, is improved in a short time whereby a large area of level ground that can be used effectively can be provided in that area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for consolidating and depositing water-containing substances in a deposition site, and more particularly to a method of flotation, in which a large amount of waste ore is generated in a flotation process for separating useful minerals from ore collected in a mine. The present invention relates to a method for compacting and depositing in a dump where wastewater containing pits is discarded.

[0002]

2. Description of the Related Art FIG. 4 is a flow chart showing an example of a preferential flotation system for complex sulfide ores. In this system, first,
The mixed concentrate of Cu-Pb was recovered by flotation, and Zn,
Leaving iron sulfide and gangue, then Cu and P, respectively.
b, flotation separation of Zn, iron sulfide and gangue. As shown in FIG. 5, the ore liquid containing waste slag generated in a large amount in the flotation process is classified by a cyclone 40, and waste sewage having a predetermined particle size or more is supplied to the upper side of the levee body 42 to form a levee. The body is grown, while the mineral liquor containing waste slag having a predetermined particle size or less is supplied to the dam reservoir 44 and / or the dam reservoir 4 formed by the embankment.
6 was discarded. Table 1 shows the particle size distribution of the mineral liquid supplied to the cyclone 40, the wastewater contained in the underflow 40a and the overflow 40b of the cyclone 40. The underflow 40a of the cyclone having a particle size of 200 mesh or more and about 78% waste is
Cyclone overflows 40b with a particle size of less than 200 mesh and about 92% wastewater are supplied above the embankment 42, and are supplied to the dam reservoir 44 and / or the dam reservoir 46.

[0003]

[Table 1]

In such a deposit of ore liquid containing waste pits, water is densely filled in the gaps between the sediments in the portion of the dam reservoir 44 below the groundwater level and in the portion of the dam reservoir 46. It penetrates and supports the load from above. Thus, the amount of waste that can be deposited above the sediment is limited because the sediment continues to exist without being compressed.

[0004] For example, if the growth rate of the embankment is 1 m / year and the remaining embankment height is 5 m, the sedimentation site becomes full in 5 years. This mine had no place for dumping mine liquor unless a new sedimentation site was created, and had to be closed. In addition, the cost of several hundred million yen per meter height of the embankment is required to reinforce the embankment, and this cost is a considerable amount.

Therefore, a method of laying sand having a predetermined thickness and a large particle size on the surface of the sediment in the dam reservoir area 44 and / or the dam reservoir area 46 and using this sand layer as a drain layer is also conceivable.
When the mineral liquid containing wastewater is discarded above the drain layer, moisture is quickly removed through the drain layer. Therefore, only the waste slag is deposited, and the sediment is compressed by its weight, and the deposition rate is reduced in each step. However, this method has a drawback that a large amount of sand is required, and a small particle size waste enters between the sands, thereby eliminating the drain effect in a short time.

When the height of the embankment 42 becomes the final embankment height, a dam reservoir area 44 and / or a dam water storage area 46 are formed inside the embankment body. The geology of this area is muddy or swampy, and it cannot be effectively used. Deposits are generally constructed in mountainous depopulated areas, but leaving large areas of flatland unused in such areas is extremely uneconomical. An object of the present invention is to solve the above-mentioned problems of the prior art, to simply and inexpensively, to consolidate a deposition portion while maintaining good drainage properties of a deposition site of a substance containing water, and to prevent liquefaction as a ripple effect. It is an object of the present invention to provide a method for compacting and depositing a substance containing water, which can further increase the seismic strength.

[0007] It is also an object of the present invention to provide a method for compacting and depositing a moisture-containing substance in a deposition field, which compresses the deposit through compaction of the depositing section, thereby reducing the deposition rate. It is. It is another object of the present invention to further improve the foundation ground of a land for sewage ore deposits containing waste slag built in a mountainous depopulated area in a short period of time, and to supply a large-area flat land 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 moisture-containing substance in a deposition field.

[0008]

In order to solve the above-mentioned problems, the present invention is to dispose a horizontal drain member at a place where an upper layer is or becomes an aqueous phase in a deposition site of a substance containing water, Disclosed is a method for consolidating and depositing a substance containing water in a deposition site, characterized in that substances containing water are successively deposited on the upper part and the deposition part is compacted while maintaining good drainage.

According to a second aspect of the present invention, in the method of the first aspect, a plurality of vertical drain members are laid at predetermined intervals on the already deposited material.
The upper end is connected to the horizontal drain member. According to a third aspect of the present invention, in the consolidation deposition method according to the first or second aspect, waste containing a large amount of water-containing substances is generated in a flotation process for separating useful minerals from ore collected in a mine. This is a mineral liquor that contains slag.
Wastewater having a predetermined particle size or more is supplied above the embankment to grow the embankment, while mineral liquid containing wastewater having a predetermined particle size or less is supplied to the dam region and / or the dam formed by the embankment. It is characterized by being disposed of in a water storage area.

According to a fourth aspect of the present invention, there is provided the compaction deposition method according to the third aspect, wherein the deposition section is made of waste having a predetermined particle size or less already deposited in the dam reservoir area and / or the dam storage area. By disposing a horizontal drain member on the surface of the surface, and discarding the mineral liquor containing waste particles having a predetermined particle size or less and depositing waste liquid having a predetermined particle size or less, the drainage is deposited while maintaining good drainage. It is characterized in that the part is compacted.

According to a fifth aspect of the present invention, in the method for compacting and depositing according to the fourth aspect, when the horizontal drain member is disposed, the predetermined particle diameter already deposited in the dam reservoir area and / or the dam reservoir area. It is characterized in that a plurality of vertical drain members are laid at predetermined intervals in a deposition section made of the following sewage, and the upper ends thereof are connected to the horizontal drain members.

The invention described in claim 6 is the invention according to claim 4 or 5.
In the consolidation deposition method described in the above, after the height of the embankment body reaches a predetermined height, the disposal of the mineral liquor into the dam reservoir area and / or the dam storage area is stopped, and the drainage using the horizontal drain member is performed. It is characterized in that the foundation ground in the area is improved in a short time by consolidation in the sedimentation section, and furthermore, by flattening the surface, a large-area flat land that can be effectively used for depopulated mountainous areas is provided.

[0013] According to an eighth aspect of the present invention, in the consolidation deposition method according to any one of the first to seventh aspects, the horizontal drain member is made of a pair of upper and lower synthetic fibers or synthetic resin. It is characterized by comprising a paper drain member composed of a belt-shaped surface member and a plastic core plate material embossed in a concave and convex shape having a water passage mounted inside and having a water passage therethrough.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for compacting and depositing a substance containing water in a deposition field according to the present invention will be described in detail with reference to a preferred embodiment shown in the drawings. 1 and 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 in which a consolidation deposition method according to the present invention is performed.

The state shown is a stage in which a dam reservoir 4 and a dam reservoir 6 have been formed to some extent inside the embankment body 2. At this stage, the sediment and dam reservoir 6
A paper drain member 10 having a width of 1 m and a length of about 80 m is placed in a horizontal direction at intervals of about 10 m on the surface of the deposit deposited on the bottom of the paper.

As shown in FIG. 3, the paper drain member 10 includes a pair of upper and lower water-permeable belt-like surface members 12 made of synthetic fibers or synthetic resin, and a plastic-made member mounted inside the water-permeable belt-like member 12. And a core plate 14.
The core plate 14 has a large number of uneven embosses 14a, 1
4b is formed, and a water passage 14c through which water passes through the gap
To form Various paper drain members 10 are commercially available. For example, 4-1-8 Konan, Minato-ku, Tokyo
There is a public drain (product name) manufactured by Asahi Engineering Co., Ltd. In the illustrated embodiment, the pair of upper and lower belt-shaped surface members 12 are connected to each other at their edges by independent members. However, it is needless to say that the core plate 14 may be inserted into the inside of the tubular member. . The end of the paper drain member 10 on the dam water storage area 6 side is preferably sealed by an appropriate means to prevent the waste sewage from entering and causing clogging.

In the illustrated preferred embodiment, a predetermined interval, for example, 10 m in the vertical and horizontal directions, is provided in the accumulation section made of waste 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 area is sludge and the force required for driving is not so large, the vertical drain member 20 can be made of plastic. As will be described below, the practice of the method of the present invention causes the sediment above the level at which the paper drain member 10 is installed to be compressed and increased in density. Therefore, the load applied to the sediment below the level where the paper drain member 10 is installed becomes large, and pressurizes the water existing in the portion. Due to this pressing force, water is pushed into the vertical drain member 20 and further discharged through the paper drain member 10. As a result, moisture around the deposit below the level where the paper drain member 10 is installed is removed, and the deposit in this portion is also compressed.

Due to the compaction of the deposit above and below the level where the paper drain member 10 is installed, the deposition rate of the deposit is reduced in each step as compared with the conventional method. Thereby, the height of the embankment body 2 which has to be increased per unit time, for example, in one year is reduced in each step, and there is an advantage that the cost is reduced accordingly. Even more, the total amount of waste that can ultimately be deposited can be dramatically increased, prolonging the life of the mine.

Further, after the height of the embankment body 2 reaches the final height, the disposal of the mineral liquor into the dam reservoir 4 and / or the dam reservoir 6 is stopped. At this time, the dam area 4
And / or the dam water storage area 6 is formed, and the drainage is performed in a short time by using the paper drain member 10. Along with this, due to the compaction of the deposit above and below the level where the paper drain member 10 is installed, compaction is performed in the deposit portion in a short time, and the foundation ground in the area is improved. Further, by leveling the surface, it is possible to supply a large-area flat land that can be effectively used in a mountainous depopulated area with little flat land.

Next, a method for compacting and depositing a substance containing moisture in a deposition field according to the present invention will be described with reference to the drawings. The method of the present invention generally comprises arranging a horizontal drain member at a location where the upper layer of a deposition site for a water-containing substance is or should be an aqueous phase, and then a substance containing a water-containing substance thereon. And a step of consolidating the deposited portion while maintaining good drainage performance. The method of the present invention can be carried out after a certain amount of deposits are deposited on the deposition site, or the method of the present invention can be carried out without deposits on the deposition site.

When the method of the present invention is carried out in a state where there is no deposit at the deposition site, all deposits to be deposited are deposited while being compacted, so that the total amount of deposit that can be deposited is maximized. . In the case where the method of the present invention is carried out after a certain amount of deposits have been deposited on the deposition site, a plurality of vertical drain members are laid at predetermined intervals on the already deposited deposit, and the upper ends thereof are connected to the horizontal drain members. Is preferred. The method according to the invention has the advantage that it can be carried out on existing deposition sites. In addition, 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 lower 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 liquor containing waste slag generated in a large amount in a flotation process for separating useful minerals from ores collected in a mine. In that case, the mineral liquor is classified by the cyclone 3 before the mineral liquor is discarded in the sedimentation pit, and the waste slag 3a having a predetermined particle size or more is embanked.
To grow the embankment body 2 (indicated by a dashed line in FIG. 1), while the ore liquid 3b containing wastewater having a predetermined particle size or less is formed in the dam area 4 formed by the embankment body. as well as/
Alternatively, it can be disposed in the dam storage area 6.
Without transporting earth and sand from other areas, the dam area 4
And / or as the water level of the dam reservoir 6 rises, the levee 2 constructed with wastewater having a predetermined particle size or more can be gradually raised.

A horizontal drain member is disposed on the surface of the sedimentation section having a predetermined particle size or less that has already been deposited in the dam reservoir area 4 and / or the dam storage area 6, and a waste material having a predetermined particle size or less is disposed thereon. By discarding the slag-containing mineral liquor 3b and accumulating waste slag having a predetermined particle size or less, it is possible to consolidate the accumulation portion while maintaining good drainage.

At the time of arranging the horizontal drain members, a plurality of vertical drain members 20 are arranged at predetermined intervals in the accumulation portion made of waste having a predetermined particle size or less already accumulated in the dam reservoir 4 and / or the dam reservoir 6. While laying, the upper end can be connected to the horizontal drain member. It is possible to compress wastes above and below the level at which the horizontal drain member is installed, and to reduce the deposition rate of the deposit in each step as compared with the conventional method.

For example, when a horizontal drain member and a vertical drain member 20 having a depth of 20 m are laid in a deposition site where deposits have already been deposited to a height of 50 m and further 14 m can be deposited, the deposition speed is 1 m / year. Then 1
It will be the final embankment height in 4 years. Actually, if the conventional method is continued without carrying out the consolidation method, a natural settlement amount of 3.3 m can be expected,
Mineral liquor can be discarded for a total of about 17 years. On the other hand, when the method of the present invention is carried out under the same conditions, a settlement amount of 8.4 m due to consolidation can be expected, and the mineral liquor can be continuously discarded for a total of about 22 years. Therefore, there is an advantage that the period during which the mineral liquor can be discarded is extended for about 5 years. After the height of the embankment 2 reaches the final embankment height, the disposal of the mineral liquor into the dam reservoir 4 and / or the dam reservoir 6 is stopped, and the drainage using the horizontal drain member and the accumulation at the sedimentation section are performed. The consolidation improves the ground in the area in a short period of time, and furthermore, by leveling the surface, it is possible to supply a large-area flat land that can be effectively used in a mountainous depopulated area.

As the horizontal drain member, a water-permeable strip-shaped surface member 12 made of a pair of upper and lower synthetic fibers or synthetic resin.
A paper drain member 10 made of a plastic core plate material 14 mounted on the inside thereof and having an embossed uneven shape having a water passage through which water passes inside can be used. It has the advantage of being inexpensive and having uniform performance.

[0027]

The consolidation deposition method according to the present invention is characterized in that a horizontal drain member is disposed at a location where an upper layer is or should be an aqueous phase in a deposition site of a substance containing moisture, and water is deposited thereon. Since the containing substances are successively deposited, there is an effect that the deposited portion can be compacted easily and inexpensively while maintaining good drainage.

[0028] The method of the present invention also has the effect of compressing the sediment through the consolidation of the sediment, thereby prolonging the life of the sedimentation field. The method of the present invention can further improve the foundation ground of a sewage-containing ore sewage pit built in a mountainous depopulated area in a short time, and can supply a large-area flat area that can be effectively used in the area. Has an effect.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing a deposition site for discarding a mineral liquor containing waste slag generated in a large amount in a flotation process for implementing a consolidation 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 flowchart illustrating an example of a preferential flotation system of a complex sulfide ore.

FIG. 5 is a schematic cross-sectional view showing a conventional dumping site for ore liquid disposal.

[Explanation of symbols]

 2 embankment body 3 cyclone 4 dam area 6 dam reservoir area 10 paper drain member 12 belt-shaped surface member 14 core plate material 20 vertical drain member

Claims (8)

[Claims] 1. In a deposition site for a substance containing water, a horizontal drain member is disposed at a place where the upper layer is or should be an aqueous phase, and a substance containing water is deposited on the horizontal drain member one after another, and drainage is performed. A consolidation method in a deposition site for a substance containing moisture, wherein the consolidation portion is compacted while maintaining good properties. 2. The method according to claim 1, wherein a plurality of vertical drain members are laid at predetermined intervals on the already-deposited sediment, and an upper end thereof is connected to the horizontal drain member. A method of compacting and depositing a material containing water, which is a characteristic feature, in a deposition field. 3. The consolidation deposition method according to claim 1, wherein the water-containing substance includes wastes generated in a large amount in a flotation process of separating useful minerals from ores collected in a mine. In disposal of mineral liquor containing waste slag in a sedimentation site, the mineral liquor is classified and waste sewage having a predetermined particle size or more is supplied above the levee to grow the levee,
Compacting sedimentation in a sedimentation area of a substance containing water, wherein a mineral liquor containing waste hulls having a predetermined particle size or less is disposed of in a dam reservoir and / or a dam reservoir formed by the embankment. Method. 4. The method according to claim 3, wherein the horizontal drain member is provided on a surface of a deposition portion having a predetermined particle size or less and has already been deposited in a dam reservoir area and / or a dam reservoir area. By disposing the mineral liquor containing waste hulls of a specified particle size or less and depositing waste sewage of a predetermined particle size or less on it, it is possible to consolidate the deposited part while maintaining good drainage. A method of compacting and depositing a material containing water, which is a characteristic feature, in a deposition field. 5. The consolidation method according to claim 4, wherein, when the horizontal drain member is disposed, the sediment consisting of waste having a predetermined particle size or less already deposited in the dam reservoir area and / or the dam reservoir area. A plurality of vertical drain members are laid at predetermined intervals in the portion, and upper ends thereof are connected to the horizontal drain members. 6. The consolidation method according to claim 4, wherein after the height of the embankment reaches a predetermined height, the disposal of the mineral liquor into the dam reservoir area and / or the dam storage area is stopped. Then, the ground in the area is improved in a short time by drainage using the horizontal drain member and consolidation at the sedimentation section, and furthermore, by arranging the surface, a large area that can be effectively used in a mountainous depopulated area. Compaction deposition method in a deposition site of a substance containing water, characterized by supplying a flat ground. 7. The consolidation method according to claim 6, wherein as the earth and sand used for the formation, waste having a predetermined particle size or more obtained by classification is used. Consolidation deposition method. 8. The consolidation deposition method according to claim 1, wherein the horizontal drain member comprises a pair of upper and lower synthetic fibers or a water-permeable band-shaped surface member made of a synthetic resin. A method for consolidating and depositing a water-containing substance in a deposition site, comprising a paper drain member comprising a plastic core plate material embossed in a concave and convex shape having a water passage through which water is passed inside.