Tailing pond with multi-layer inhibition habitat structure

Abstract

The utility model discloses a tailing pond with a multi-layer inhibition habitat structure, and relates to the technical field of tailing ponds, the tailing pond comprises an outer coating structure layer, a plurality of inhibition interlayers and a plurality of waste slag rolling layers are arranged in the outer coating structure layer, the plurality of inhibition interlayers and the plurality of waste slag rolling layers are arranged in a staggered manner, and the plurality of inhibition interlayers and the plurality of waste slag rolling layers are arranged in a staggered manner. And both the outer coating structure layer and the inhibition interlayer have water resistance. According to the utility model, the inhibition interlayers with waterproof performance are adopted, so that the problem of water seepage is avoided, and a plurality of inhibition interlayers and a waste slag rolling layer are specially arranged, so that water is difficult to flow into the lower part even if the water seepage problem occurs on the upper part, and further expansion of the water seepage problem can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of tailings ponds, in particular to a tailings pond with a multi-level chemical barrier habitat structure. Background Art

[0002] The mining of mineral resources inevitably produces a large amount of waste slag due to work such as working shaft construction, tunnel excavation, mining, and ore dressing.

[0003] The current standard practice for tailings pond construction is to dig a deep pit or use mountain valleys, lay a polymer film in the pit or valley, then dump waste slag into it, and finally cover the top with the polymer film to seal the site.

[0004] However, a large number of engineering practices have proved that during the construction of waste slag dumping and the operation of waste slag storage sites, it is inevitable that the polymer film will be punctured or torn due to aging, etc., resulting in atmospheric rainfall or groundwater infiltration into the waste slag body to produce water-rock reaction. The heavy metal minerals co-existing with sulfur in the waste slag are gradually oxidized by dissolved oxygen in the water and microbial oxidation (including microbial catalytic oxidation) to gradually form an acidified environment. The environmental pH value gradually decreases with the oxidation, from weak acid to strong acid. As the pH value gradually decreases, the heavy metals in the tailings pond and mining waste slag pile are activated, and the acidophilic microorganisms co-existing with the minerals, such as Thiobacillus ferrooxidans (Tf) and Thiobacillus thiooxidans (Tt), are activated to oxidize sulfides into elemental sulfur or sulfate, or thiosulfate, and reduce reduced inorganic sulfides such as H 2 S, S or FeS 2 Oxidation to generate sulfuric acid and its salts is called sulfidation, which eventually leads to the long-term seepage of acidic wastewater (AMD) containing toxic heavy metals and seriously exceeding pH values ​​from the bottom of tailings ponds and coal gangue disposal sites. The flow of AMD into rivers also causes damage to facilities such as bridges and port gates. Therefore, it is urgently necessary to adopt new technical routes for the landfill disposal of tailings containing heavy metals. Utility Model Content

[0005] The purpose of the utility model is to provide a tailings pond with a multi-level barrier habitat structure to solve the problems existing in the above-mentioned prior art. By setting up a multi-layer barrier interlayer structure, the overall anti-seepage performance can be effectively improved.

[0006] To achieve the above purpose, the utility model provides the following solutions:

[0007] The utility model provides a tailings pond with a multi-layer chemical barrier structure, comprising an outer coating structure layer, wherein a plurality of chemical barrier layers and a plurality of waste slag compaction layers are arranged inside the outer coating structure layer, the plurality of chemical barrier layers and the plurality of waste slag compaction layers are arranged alternately, and the outer coating structure layer and the chemical barrier layers both have water-isolating properties.

[0008] Preferably, the outer covering structure layer comprises a top covering layer, a side covering layer and a bottom covering layer, and the top covering layer and the bottom covering layer are respectively arranged at the upper and lower ends of the side covering layer.

[0009] Preferably, a plurality of drainage grooves are provided around the outer covering structure layer.

[0010] Compared with the prior art, the utility model has achieved the following technical effects:

[0011] The utility model utilizes multiple layers of impermeable barrier layers to separate several waste slag compaction layers. The barrier layers can effectively play a waterproof role. More importantly, multiple layers of barrier layers are set up, so that even if water seepage occurs in the upper waste slag compaction layer, it is difficult to affect the lower waste slag compaction layer, thereby avoiding further expansion of the problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 This is a schematic diagram of the structure of a tailings pond with a multi-level chemical barrier structure according to an embodiment of the utility model;

[0014] In the figure: 1-external covering structure layer; 2-drainage ditch; 3-chemical barrier layer; 4-waste slag rolling layer. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] The purpose of the utility model is to provide a tailings pond with a multi-level barrier habitat structure to solve the problems existing in the above-mentioned prior art. By setting up a multi-layer barrier interlayer structure, the overall anti-seepage performance can be effectively improved.

[0017] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0018] like Figure 1 As shown, the utility model provides a tailings pond with a multi-layer barrier chemical habitat structure, including an outer coating structure layer 1, in which a plurality of barrier chemical barriers 3 and a plurality of waste slag rolling layers 4 are arranged, and the plurality of barrier chemical barriers 3 and the plurality of waste slag rolling layers 4 are staggered along the vertical up and down direction. In this embodiment, there are three barrier chemical barriers 3 and four waste slag rolling layers 4, and the bottom layer is the waste slag rolling layer 4. More importantly, the outer coating structure layer 1 and the barrier chemical barriers 3 are water-proof, and the materials of the outer coating structure layer 1 and the barrier chemical barriers 3 include but are not limited to existing geopolymers (also known as geopolymers), geopolymer composite clays (also known as polymer clays), composite polymer films and other flexible and impermeable materials.

[0019] In actual use, since the outer coating structure layer 1 and the barrier layer 3 are themselves impermeable and multiple barrier layers 3 are provided, the waste slag rolling layers 4 of each layer are not easily affected by each other, thereby enhancing the overall anti-seepage performance.

[0020] In this embodiment, if Figure 1 As shown, the outer covering structure layer 1 includes a top covering layer, a side covering layer and a bottom covering layer, wherein the top covering layer and the bottom covering layer are respectively arranged at the upper and lower ends of the side covering layer, wherein the top covering layer and the bottom covering layer can be made of composite polymer membranes, and the side covering layer can be cast with geopolymers or geopolymer composite clay.

[0021] In this embodiment, a plurality of drainage grooves 2 are provided around the outer covering structure layer 1. Specifically, Figure 1 A drainage groove 2 is provided on the left and right sides of the outer covering structure layer 1. Since the top covering layer is a conical structure and the diameter gradually increases from top to bottom, once it rains, the rainwater will flow along the top covering layer to both sides and finally be discharged from the drainage grooves 2 on both sides.

[0022] This embodiment also provides a construction method of a tailings pond with a multi-level chemical barrier structure, comprising the following steps:

[0023] Step 1: Select a site, choose a suitable deep pit or valley;

[0024] Step 2: Clean up and remove branches and rocks on the ground;

[0025] Step 3: Laying the bottom cladding layer;

[0026] Step 4: pour the side covering layer around the bottom covering layer to a certain height;

[0027] Step 5: Fill the waste slag and roll it, and then set a barrier layer 3 on the waste slag rolling layer 4;

[0028] Step 6: At the end of step 5, the height of the barrier layer 3 should be similar to the previous height of the side covering layer. At this time, it is necessary to continue pouring the side covering layer to the expected height;

[0029] Step 7: Repeat steps 5 to 6 until the waste slag rolling layer 4 is filled to the expected volume, and then lay the top covering layer on the topmost waste slag rolling layer 4;

[0030] Step 8: Finally, a predetermined number of drainage grooves 2 are arranged around the outer covering structure layer 1 to complete the entire construction process.

[0031] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A tailings pond with a multi-level chemical barrier structure, characterized in that: It comprises an outer coating structure layer, in which a plurality of chemical barrier layers and a plurality of waste slag compaction layers are arranged, the plurality of chemical barrier layers and the plurality of waste slag compaction layers are arranged alternately, and the outer coating structure layer and the chemical barrier layers are both water-proof.

2. The tailings pond with a multi-level chemical retardation habitat structure according to claim 1, characterized in that: The outer covering structure layer comprises a top covering layer, a side covering layer and a bottom covering layer, wherein the top covering layer and the bottom covering layer are respectively arranged at the upper and lower ends of the side covering layer.

3. The tailings pond with a multi-level chemical retardation habitat structure according to claim 1, characterized in that: A number of drainage grooves are arranged around the outer cladding structure layer.

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