CN213819073U - Be used for prosthetic grass planting brick of tombarthite tailing and tombarthite tailing environment to restore structure - Google Patents
Be used for prosthetic grass planting brick of tombarthite tailing and tombarthite tailing environment to restore structure Download PDFInfo
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- CN213819073U CN213819073U CN202022427941.7U CN202022427941U CN213819073U CN 213819073 U CN213819073 U CN 213819073U CN 202022427941 U CN202022427941 U CN 202022427941U CN 213819073 U CN213819073 U CN 213819073U
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Abstract
The utility model belongs to the technical field of the ecological restoration technique of tailing and specifically relates to a be used for prosthetic grass planting brick of tombarthite tailing and tombarthite tailing environment to restore structure. The grass planting brick is a fly ash calcium brick and comprises a brick body, the brick body is square or rectangular, and a hole is formed in the center of the brick body; four corners of the brick body are respectively provided with a unfilled corner; the brick body is provided with a cracking groove. The rare earth tailing environment restoration structure comprises a plurality of longitudinal grass planting ditches and a plurality of transverse grass planting ditches, wherein the longitudinal grass planting ditches and the transverse grass planting ditches are arranged on a mine of rare earth tailings and form a grid shape, and the grass planting bricks are laid in the longitudinal grass planting ditches and the transverse grass planting ditches. The utility model discloses a grass planting brick has become the partly of restoreing back soil, fixes soil through the grass planting brick, reduces soil erosion and water loss.
Description
Technical Field
The utility model belongs to the technical field of the ecological restoration technique of tailing and specifically relates to a be used for prosthetic grass planting brick of tombarthite tailing and tombarthite tailing environment to restore structure.
Background
Gannan rare earth ore is mined and utilized in the 70 th of the 20 th century, and since mining, long-term disordered mining, backward mining technology, low recovery rate and excessive mining cause serious problems of vegetation damage, water and soil loss and soil degradation. The soil degradation is mainly shown in the aspects of soil fertility degradation, soil acidification, soil heavy metal pollution, soil mineral leaching agent residue and the like. Meanwhile, the surrounding environment is polluted through different ways, so that the surrounding farmland and surface water are seriously polluted. The soil texture of the rare earth tailings is tight sand soil, the content of physical sticky particles (less than or equal to 0.01 mm%) is only 6, and the soil degradation caused by the damage of the leaching agent to the soil structure and the serious water and soil loss is serious. The soil acidification is serious, the pH value is lower than the soil background value of 5.1 in Jiangxi province, and the soil pH value is strong acid; the content of alkaline hydrolysis nitrogen in the soil is at the first-level (extremely high) level, the content of alkaline hydrolysis nitrogen in the soil is mainly the residue of ammonium ions of a leaching agent in a mining area, and the content of NH in the soil4+The content of (A) is up to 40.56 mg/kg; the soil total potassium content is also at a very high level, the total phosphorus is at a relatively deficient level, the quick-acting potassium content is at a deficient level, and the soil quick-acting phosphorus and total nitrogen contents are at very deficient levels; the organic matter content of the soil is only 1.95g/kg, and is in a very deficient level. The results show that the soil in the mining area is affected by mining and mineral leaching, and the nutrients are seriously degraded. Plants, especially crops, cannot grow or grow poorly in rare earth tailings soils.
At present, the method for repairing the rare earth tailings mainly uses an alkaline modifier to neutralize acid substances in soil, but the method needs to fully mix the rare earth tailings soil and the acid substances, namely the soil of the rare earth tailings needs to be dug and then mixed into the alkaline modifier, so that the soil loss of the rare earth tailings is very serious in the repairing process.
Therefore, a structure for repairing the acid tight sandy soil of the rare earth tailings, which can improve the nutrients of the rare earth tailings soil and reduce water and soil loss, is needed.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a be used for prosthetic grass planting brick of tombarthite tailing and tombarthite tailing environment to restore structure mainly aims at providing one kind and improves the nutrient of tombarthite tailing soil, reduces the environment remediation method of tombarthite tailing soil erosion and water loss.
In order to achieve the above object, the utility model mainly provides the following technical scheme:
the utility model provides a be used for prosthetic grass planting brick of tombarthite tailing, the grass planting brick is fly ash calcium brick, the grass planting brick includes the brick body, the brick body is square or rectangle be equipped with on the brick body: the central position of the brick body is provided with a hole; the four corners of the brick body are respectively provided with one unfilled corner; the cracking groove is arranged on the brick body.
Preferably, the fly ash calcium brick is prepared by taking fly ash, lime, aggregate and a curing agent as raw materials, adding water, stirring, aging and forming, wherein the raw materials of the fly ash calcium brick comprise the following components in parts by weight: 60-70 parts of fly ash, 11-18 parts of lime, 15-20 parts of aggregate and 2-4 parts of curing agent.
Preferably, the depth of the cracking groove is D1, the thickness of the brick body is D2,1/2D2≥D1≥1/4D2。
preferably, the splitting slots are distributed in a net shape on the surface of the brick body.
A rare earth tailing environment restoration structure is characterized in that a plurality of longitudinal grass planting ditches and a plurality of transverse grass planting ditches are arranged on a mine of rare earth tailings, the longitudinal grass planting ditches and the transverse grass planting ditches form a grid shape, the grass planting bricks are laid in the longitudinal grass planting ditches and the transverse grass planting ditches,
further, the distance between two adjacent longitudinal grass planting ditches is 3-5 meters;
further, the distance between two adjacent transverse grass planting ditches is 3-5 meters.
Furthermore, the cross sections of the longitudinal grass planting ditches and the transverse grass planting ditches are in inverted trapezoids.
Further, the tail end of the longitudinal grass planting ditch is connected with a water inlet of a sand sedimentation tank, a water outlet is formed in the sand sedimentation tank, the water inlet of the sand sedimentation tank and the water outlet of the sand sedimentation tank are not on the same straight line, the water outlet of the sand sedimentation tank is connected with a water storage tank, and the water storage tank provides irrigation water for the latticed land parcel.
Further, the water storage tank is connected with the peripheral water system through a drainage ditch.
Furthermore, acid-resistant gramineous plants are planted in the holes of the grass planting bricks
Compared with the prior art, the utility model discloses a be used for prosthetic grass planting brick of tombarthite tailing and tombarthite tailing environment to restore structure has following beneficial effect:
1) the grass planting bricks (fly ash calcium bricks) are continuously eroded by ammonium sulfate to react, so that the fly ash calcium bricks become a part of the soil after restoration. The existence of the cracking groove can further facilitate the cracking of the grass planting bricks, and the soil is fixed through the grass planting bricks, so that the erosion of rainwater on the bare soil of the rare earth tailings is avoided, and the water and soil loss of the rare earth tailings is reduced;
2) the longitudinal grass planting ditches and the transverse grass planting ditches are arranged on the mine of the rare earth tailings to form a grid-shaped grass planting ditch, and the grass planting bricks are paved in the longitudinal grass planting ditches and the transverse grass planting ditches, so that the mine with almost no vegetation rare earth tailings can be planted with acid-resistant gramineous plants to reduce water and soil loss;
3) the water on the rare earth tailing mine is collected to the grass planting ditch, so that the erosion of rainwater to the bare soil of the rare earth tailings is avoided, and the flow rate of collected water can be reduced due to the fact that plants are planted in holes of the grass planting bricks, and the water and soil loss of the rare earth tailings is further reduced.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.
Drawings
FIG. 1 is a schematic structural view of the grass planting brick of the present invention;
FIG. 2 is a schematic diagram of the rare earth tailings mine structure after the rare earth tailings environment is repaired;
FIG. 3 is another schematic structural diagram of the rare earth tailings mine after the structure is repaired by the rare earth tailings environment of the utility model;
fig. 4 is a schematic cross-sectional view of the grass planting ditch of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the intended purpose of the present invention, the following detailed description is given with reference to the preferred embodiments, and the features and effects thereof according to the present invention.
Examples of grass-planting bricks
As shown in fig. 1, the grass planting brick is a fly ash calcium brick, and comprises a brick body 10, wherein the brick body 10 is square or rectangular, and a hole 11 is formed in the center of the brick body 10; four corners of the brick body 10 are respectively provided with a unfilled corner; four splitting grooves 12 extend from the hole 11 to four sides of the brick body 10. The holes 11 and the notches can be used for planting gramineous plants, and water can flow in or out from the holes 11 and the notches. The grass planting brick is fly ash calcium brick, the grass planting brick can take place to decompose under the erosion condition of ammonium sulfate, especially 12 positions in schizolysis groove, and is just very fragile itself, constantly by the erosion in-process at the grass planting brick, at first breaks off, thereby makes the grass planting brick becomes the fragment, with wait to restore soil and combine together.
Preferably, the fly ash calcium brick is prepared by taking fly ash, lime, aggregate and a curing agent as raw materials, adding water, stirring, aging and forming, wherein the raw materials of the fly ash calcium brick comprise the following components in parts by weight: 60-70 parts of fly ash, 11-18 parts of lime, 15-20 parts of aggregate and 2-4 parts of curing agent.
In this embodiment, the grass planting bricks (fly ash calcium bricks) are continuously eroded by ammonium sulfate to react, so that the fly ash calcium bricks become a part of the repaired soil. The existence of the cracking groove 12 can further facilitate the cracking of the grass planting bricks.
Further, in order to facilitate the erosion cracking of the grass planting bricks, the depth of the cracking groove 12 is D1, the thickness of the brick body 10 is D2,1/2D2≥D1≥1/4D2. in this embodiment, the depth of the cracking groove 12 is half the thickness of the brick body 10. The depth of the cracking groove 12 is small, and the brick body 10 is less likely to be cracked (is less likely to be damaged during construction).
Further, the cracking grooves 12 can be distributed around the holes 11 in a net shape, so that the grass-planting bricks can be decomposed into fragments.
Structure embodiment for repairing rare earth tailings in environment
As shown in fig. 2 to 4, in the present embodiment, a rare earth tailing environment repairing structure is disclosed, a plurality of longitudinal grass planting furrows and a plurality of transverse grass planting furrows are arranged on a mine of rare earth tailings, the longitudinal grass planting furrows and the transverse grass planting furrows form a grid shape, grass planting bricks in the grass planting brick embodiment are laid in the longitudinal grass planting furrows and the transverse grass planting furrows, and a distance between two adjacent longitudinal grass planting furrows is 3 to 5 meters; the distance between two adjacent transverse grass planting ditches is 3-5 meters.
The cross sections of the longitudinal grass planting ditches and the transverse grass planting ditches are in inverted trapezoids. The tail end of the longitudinal grass planting ditch is connected with a water inlet of the sand sedimentation tank, a water outlet is arranged on the sand sedimentation tank, and the water inlet of the sand sedimentation tank and the water outlet of the sand sedimentation tank are not in the same straight line, so that rainwater entering the sand sedimentation tank can be fully precipitated and then flows out. And a water outlet of the sand sedimentation tank is connected with a water storage tank, and the water storage tank provides irrigation water for the grid-shaped plots. The reservoir is connected with the peripheral water system through a drainage ditch. Acid-resistant gramineous plants are planted in the holes 11 of the grass planting bricks.
In this embodiment, the soil texture of the rare earth tailings is poor due to the heap leaching mining process adopted by the ionic rare earth tailings. The soil texture of the rare earth tailings can be specifically summarized as the following points: 1) the content of ammonium ions in the rare earth tailings reaches up to 40.56mg kg-1(ii) a 2) The rare earth tailings are tight sand, and the content of physical sticky particles (less than or equal to 0.01 mm%) is only 6; 3) the organic content is only 1.95g kg-1(ii) a 4) The rare earth tailing soil is strongly acidic, and the pH value of the soil is only 4.05; 5) besides alkaline hydrolysis nitrogen and total potassium of soil in a mining area, other soil nutrients are in a deficiency level, and the comprehensive fertility of the soil is in grade III (poor). Therefore, plants, especially crops, cannot grow or grow poorly in rare earth tailings soils.
Form latticed grass planting ditch through setting up vertical grass planting ditch 2 and horizontal grass planting ditch 1 on the mine of tombarthite tailing, make the soil of tombarthite tailing fix through latticed grass planting ditch, and vertical grass planting ditch 2 and horizontal grass planting ditch 1 are spread and are equipped with grass planting brick 3, the setting of grass planting ditch and grass planting brick 3 can make the mine of the tombarthite tailing that does not have vegetation almost can plant acid resistance grass family plant. Therefore, on one hand, the rare earth tailings mine can be used for planting plants, and after the soil of the rare earth tailings mine is covered with the plants, the water loss and soil erosion can be reduced; on the other hand, the soil can be fixed through the grass planting bricks 3, so that water and soil loss is reduced; on the other hand, water on the rare earth tailing mine is collected to the grass planting ditch, so that the erosion of rainwater to the bare soil of the rare earth tailings is avoided, and the flow rate of the collected water can be reduced due to the fact that plants are planted in the holes 11 of the grass planting bricks, and therefore the water and soil loss of the rare earth tailings is further reduced.
By planting the acid-resistant gramineous plants in the holes 11 of the grass planting bricks 3, firstly, the gramineous plants can grow on the rare earth tailings, the soil of the rare earth tailings contains a large amount of ammonium sulfate residues, so that the soil of the rare earth tailings is strong in acidity, and by planting the acid-resistant gramineous plants in the strong acid soil, vegetation in a grass planting ditch is increased, so that water and soil in the grass planting ditch are intercepted by the plants, and water and soil loss is reduced; secondly, the organic matter content of the soil on the rare earth tailing mine can be increased through the growth mode of the gramineous plants with short growth period, so that the effect of improving the soil texture is achieved.
In order to quickly restore the soil in the grid-shaped land, an alkaline modifier is mixed into the soil in the grid-shaped land, so that alkali in the alkaline modifier and ammonium sulfate in the soil on the surface of the grid-shaped land are used for performing acid-base neutralization reaction to adjust the pH value of the soil to a range suitable for plant growth. In this embodiment said mix in alkaline modifier in the top soil, through spilling on the soil surface promptly, then can make rare earth tailings and alkaline modifier mixing through the mode of loosening the soil, this kind of mode is very convenient.
Since gramineous plants live only in the surface soil of the soil, gramineous plants can grow in the rare earth tailings by mixing the alkaline modifier in the surface soil of the rare earth tailings soil.
On one hand, the grass planting bricks provide an environment for plant growth in the early stage, and gramineous plants can grow in the holes 11 of the grass planting bricks; on the other hand, along with the growth of the root system of the gramineous plant, the fixing force of the grass planting bricks and the soil can be enhanced.
Further, in order to realize ecological restoration of the rare earth tailings in the microscopic aspect, the grass planting brick 3 is a fly ash calcium brick, the fly ash calcium brick is prepared by taking fly ash, lime, aggregate and a curing agent as raw materials, adding water, stirring, aging and forming, wherein the raw materials of the fly ash calcium brick are calculated according to the parts by weight: 60-70 parts of fly ash, 11-18 parts of lime, 15-20 parts of aggregate and 2-4 parts of curing agent.
As the rare earth tailing soil is strongly acidic (the pH value is only 4.05), the source of the acidic substance is mainly ammonium sulfate which is used in large amount in the heap leaching exploitation of the rare earth tailings. The grass planting brick is made of fly ash, lime,The fly ash calcium brick is prepared by taking aggregate and curing agent as raw materials. The soil improved by the alkaline improver is only the surface soil, and the fly ash calcium brick is continuously eroded by ammonium sulfate in the lower soil to react, so that the fly ash calcium brick becomes a part of the repaired soil. The main reaction of the ammonium sulfate and the fly ash calcium brick is as follows: OH group-And NH4 +Reaction to generate ammonia and water, and ammonia escape, wherein Ca2+As flocculant, the soil texture is changed into sandy loam or intermediate loam, OH-And NH4 +The reaction is carried out to generate ammonia and water, and the ammonia escapes. Ca of the present application2+The flocculant is used for changing soil texture (restoring tight sand into sandy soil or middle soil) by Ca2+And (3) performing chemical reaction with the rare earth ore to change the texture of the soil.
Further, the alkaline modifier is a mixture of biochar and lime, and when the biochar and the alkaline modifier are added into the rare earth tailing soil, the biochar and the alkaline modifier are fully and uniformly mixed with the soil. As the rare earth tailing soil is strongly acidic (the pH value is only 4.05), the source of the acidic substance is mainly ammonium sulfate which is used in large amount in the heap leaching exploitation of the rare earth tailings. In addition, the rare earth tailing soil is extremely lack of organic matters and nutrients, and the soil texture is tight sand soil, so that plants cannot grow or the growth condition is poor. The pH value of the soil can be adjusted to a range suitable for planting plants through the mixture of the biochar and the lime, and the soil texture (tight sandy soil) of the rare earth tailings is improved to the soil texture (sandy loam and medium loam) suitable for planting various plants.
As a variable embodiment, the alkaline modifier is a mixture of biochar and fly ash. On one hand, as the quicklime and the fly ash are low in price and easy to obtain, on the other hand, the quicklime and the fly ash (the main chemical components are silicon dioxide, aluminum oxide, ferric oxide, calcium oxide and sulfur trioxide) react with water to generate Ca (OH)2Wherein, Ca2+As flocculant, the soil texture is changed into sandy loam or intermediate loam, OH-And NH4 +The reaction is carried out to generate ammonia and water, and the ammonia escapes; the repair principle of the application is as follows: the modifier comprises quicklime and fly ash (the components contain calcium oxide), and Ca (OH) is generated by the reaction of the calcium oxide and water2，Ca(OH)2Is a strong alkaline substance and reacts with ammonium sulfate, wherein, Ca2+As flocculant, the soil texture is changed into sandy loam or intermediate loam, OH-And NH4 +The reaction is carried out to generate ammonia and water, and the ammonia escapes. Ca of the present application2+The flocculant is used for changing soil texture (restoring tight sand into sandy soil or middle soil) by Ca2+And (3) performing chemical reaction with the rare earth ore to change the texture of the soil. The soil of the rare earth tailings restored by the method has universality of being capable of planting different plants.
The biochar is a carbon-rich material with stable property formed by thermally cracking biomass at high temperature in an anoxic or anaerobic environment. The biochar has a good adsorption effect on heavy metals in soil due to the fact that the biochar has a large specific surface area, large pore volume and rich surface oxygen-containing functional groups. The lime has the characteristics of low cost, simple operation and the like in the aspect of polluted soil remediation. The fly ash has the characteristics of light particle weight, porous and loose property, large specific surface, more active groups and stronger adsorption capacity. The problem of residual ammonium nitrogen in soil can be improved to different degrees by adding the biochar, the fly ash and the lime, and the added lime and the fly ash are alkaline, so that the ammonium nitrogen in the soil is converted into ammonia to escape from the soil. And due to the adsorption capacity of the biochar and the fly ash, the biochar and the fly ash can adsorb ammonium nitrogen in soil and reduce ammonium nitrogen leaching loss.
In order to facilitate the later-period fruit tree planting, the distance between every two adjacent longitudinal grass planting furrows 2 is 3-5 meters; the distance between two adjacent transverse grass planting ditches 1 is 3-5 meters. Thus, fruit trees can be planted in the grid-shaped plots, in this embodiment, one fruit tree is planted per plot.
In specific implementation, the grid-shaped land formed by the transverse grass planting furrows 1 and the longitudinal grass planting furrows 2 can be square (as shown in fig. 2) or parallelogram (as shown in fig. 3). The shape of the grid-shaped land mass does not affect the implementation of the present application, and the purpose of the transverse grass planting furrows 1 and the longitudinal grass planting furrows 2 is: make the soil in tombarthite tailing mine fixed through horizontal grass planting ditch 1 and vertical grass planting ditch 2, the rainwater at tombarthite tailing mine top flows to the bottom through the grass planting ditch, specifically makes the water in the adjacent vertical grass planting ditch obtain the reposition of redundant personnel through horizontal grass planting ditch 1 to reduce the discharge in a certain vertical grass planting ditch 2, can make the moisture in the grass planting ditch slow down flow through vertical grass planting ditch 2, thereby reduce soil erosion and water loss.
In order that the plants planted in the grass planting furrows are not washed away by rainwater, the acid-resistant gramineous plants planted in the grass planting brick holes 11 are paspalum broadsheet or paspalum natatum which grows well in an acidic environment.
When the concrete implementation, the tail ends of a plurality of grass planting ditches can be connected to the same sand basin 5, and a plurality of sand basins can be connected to the same water storage tank 5. The level in grass planting ditch is higher than desilting pond 5, and the level in desilting pond 5 is higher than cistern 6 to can guarantee that water flows to cistern 6 by the grass planting ditch, when using cistern 6 to irrigate, provide water in to latticed landmass through the water pump.
The sand settling tank is preferably rectangular in section, the tank body of the sand settling tank is rectangular, the water inlet and the water outlet of the tank body are arranged in a staggered mode, and the outlet elevation is 0.1m lower than the inlet elevation. The width of the sand settling tank is preferably 0.45-2 m, the length is preferably 0.9-4 m, and the depth is preferably 0.4-1.2 m. The width of the tank body is preferably 2 times of the width of all the grass planting ditches connected with the tank body, and the length of the tank body is preferably 2 times of the width of the tank body.
In the drawing of the present example, only one embodiment of a water reservoir 6 and a grit chamber 5 is shown. On the mine of great tombarthite tailing, can set up a plurality of desilting ponds 5 at the banket, every desilting pond 5 is connected with many grass planting ditches, and a plurality of desilting ponds are connected on same cistern 6.
As an alternative embodiment, a sand basin 5 and a water reservoir 6 can be arranged on the mine of higher and larger rare earth tailings and also on the gentle zone of the half-hill waist. Similarly, a plurality of sand settling ponds 5 may be provided, each sand settling pond 5 being connected to a plurality of grass planting furrows. The reservoir 6 provided on the side of the hill can supply irrigation water to the lower grid-shaped land (without a water pump) and can also supply irrigation water to the upper grid-shaped land (with a water pump).
The rainwater-washed soil flows into the transverse grass planting ditch 1 to be primarily collected, then is collected to the sand basin 5 through the longitudinal grass planting ditch 2, the soil is precipitated to the bottom of the sand basin 5, the rainwater is on the upper part of the sand basin 5, and the rainwater exceeds a certain height in the sand basin 5 and then flows into the reservoir 6 through the outlet of the sand basin 5. The outlet of the sand basin 5 is connected with a water storage tank 6, and the water storage tank 6 provides water for the grid-shaped land parcel.
The grass planting ditches are arranged at two ends or the lower end of the intercepting ditch and then connected with the sand basin 5. The grass planting ditch and the river channel of the drainage area are 30-60 degrees. The storm rain prevention standard of the grass planting ditch generally adopts the maximum rainfall of 24 hours in one time in 10 years.
In specific implementation, as shown in fig. 4, the grass planting furrows have a depth of 0.3m, an opening width of 0.6m and a bottom width of 0.4m, and the bottoms are paved by adopting the grass planting bricks 3. The cross-sectional dimensions and the unit engineering quantities of the grass planting furrows are shown in Table 1. The specific design is shown in detail in fig. 4.
The cross sections of the longitudinal grass planting ditches 2 and the transverse grass planting ditches 1 are in inverted trapezoids.
The construction scheme of the grass planting ditch is as follows: the construction of grass planting ditch includes three steps of laying out, digging ditch, trimming ditch bottom and edge and spreading grass brick.
Firstly, construction lofting: and arranging a route according to the designed grass planting ditch for construction lofting and setting a construction line. The cross section lofting of the grass planting ditch 2 adopts theodolite or cross orientation, distance measurement, pile trimming, and so on to determine a plurality of ground cross sections, and the piles are marked to connect the piles into a line, namely, the condition of each part of the grass planting ditch is shown on the ground.
Digging a grass planting ditch: and excavating along the construction line according to the construction lofting condition. When in ditching, the ditch is firstly deep and then wide, and the ditch is gradually sloped according to the design gradient; before digging to the designed depth, the deep trench should be dug first, then the width of the trench bottom should be dug, and finally the slope is repaired.
Trimming bottom edges and side edges and paving grass bricks 3: manually using a pickaxe spade to trim the side slopes on the two sides of the grass planting ditch according to the designed slope ratio, flattening the bottom edge and the side edges, then laying the grass planting bricks 3 on the bottom edge and the side edges, compacting the laying of the grass planting bricks 3, pointing the lap joints of the grass planting bricks 3 by adopting cement mortar to keep the overall stability, and broadcasting grass seeds in the holes 11 of the grass planting bricks after laying.
The surface water on the latticed land flows into the grass planting ditch 2, the soil of the latticed land is fixed by the grass planting ditch 2, and only the surface water flows into the grass planting ditch 2, so that the water and soil loss of the rare earth tailings is reduced. The grass planting ditch 2 is arranged on the mountain of the rare earth tailings with a certain gradient, and water and soil loss in the grass planting ditch 2 caused by water flow in the grass planting ditch can be reduced through the arrangement of the grass planting bricks 3 and the holes 11 of the grass planting bricks.
Although intercepted by the plants in the grass planting furrows, silt still mixes. Therefore, a sand basin 5 can be arranged at the downstream of the grass planting ditch, the sand basin 5 is also called a mud basin, and the flow rate is reduced by enlarging the water passing section, so that the sediment which does not meet the water use requirement is precipitated. When irrigating, sediment with the grain size of more than 0.03-0.05 mm should be precipitated. The sand settling rate of the sand settling tank 5 is generally 80 to 90 percent.
The sand basin 5 in this embodiment is a sludge type sand basin 5 for periodic salvage, a plurality of sand basins 5 can be arranged around a water storage pool 6, and a plurality of grass planting ditches are connected to the plurality of sand basins 5.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides a be used for prosthetic grass planting brick of tombarthite tailing, a serial communication port, the grass planting brick is fly ash calcium brick, the grass planting brick includes the brick body, the brick body is square or rectangle be equipped with on the brick body:
the central position of the brick body is provided with a hole;
the four corners of the brick body are respectively provided with one unfilled corner;
the cracking groove is arranged on the brick body.
2. A grass-planting brick as claimed in claim 1,
the depth of the cracking groove is D1, the thickness of the brick body is D2, 1/2D2 is more than or equal to D1 is more than or equal to 1/4D 2.
3. A grass-planting brick as claimed in claim 1,
the cracking grooves are distributed on the surface of the brick body in a net shape.
4. A rare earth tailing environment restoration structure is characterized by comprising a plurality of longitudinal grass planting ditches and a plurality of transverse grass planting ditches, wherein the longitudinal grass planting ditches and the transverse grass planting ditches are arranged on a mine of rare earth tailings and form a grid shape, and grass planting bricks as claimed in any one of claims 1 to 3 are paved in the longitudinal grass planting ditches and the transverse grass planting ditches.
5. The rare earth tailings environmental remediation structure of claim 4,
the distance between every two adjacent longitudinal grass planting ditches is 3-5 meters;
the distance between two adjacent transverse grass planting ditches is 3-5 meters.
6. The rare earth tailings environmental remediation structure of claim 4,
the cross sections of the longitudinal grass planting ditches and the transverse grass planting ditches are in inverted trapezoids.
7. The rare earth tailings environmental remediation structure of claim 4,
the tail end of the longitudinal grass planting ditch is connected with a water inlet of the sand sedimentation tank, a water outlet is formed in the sand sedimentation tank, the water inlet of the sand sedimentation tank and the water outlet of the sand sedimentation tank are not on the same straight line, the water outlet of the sand sedimentation tank is connected with a water storage tank, and the water storage tank provides irrigation water for the latticed plots.
8. The rare earth tailings environmental remediation structure of claim 7,
the reservoir is connected with the peripheral water system through a drainage ditch.
9. The rare earth tailings environmental remediation structure of any one of claims 4 to 8,
acid-resistant gramineous plants are planted in the holes of the grass planting bricks.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114766322A (en) * | 2022-04-29 | 2022-07-22 | 国家地质实验测试中心 | Ecological grass brick for loose sandy soil of rare earth mining area and preparation and use methods |
| CN115213998A (en) * | 2022-08-26 | 2022-10-21 | 昆明理工大学 | Method for preparing in-situ ecological grass planting bricks by using copper mine tailings |
-
2020
- 2020-10-27 CN CN202022427941.7U patent/CN213819073U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114766322A (en) * | 2022-04-29 | 2022-07-22 | 国家地质实验测试中心 | Ecological grass brick for loose sandy soil of rare earth mining area and preparation and use methods |
| CN115213998A (en) * | 2022-08-26 | 2022-10-21 | 昆明理工大学 | Method for preparing in-situ ecological grass planting bricks by using copper mine tailings |
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