67 results about "Uranium tailings" patented technology

A phytoremediation method based on soil contaminated by uranium tailings comprises the steps for culturing pokeberry seedlings on a substrate containing uranium tailings, surviving, growing, harvesting and centrally processing. The method comprises the following steps of: (1) mixing soil contaminated by uranium tailings, surface oil of forest and pig manure according to a ratio to obtain a culture substrate; (2) adding sodium silicate in the culture substrate; (3) sterilizing seeds; and (4) potting. By adopting the comprehensive processing scheme combined with the pokeberry, the uranium tailings, the surface oil of forest, the pig manure and the sodium silicate, the method can solve the difficult problem that the environment can be endangered by heavy metal, uranium, which is released by uranium tailings under natural condition. The method has the advantages of convenient operation and management, high remedying efficiency, low cost, low environment risk, environment beautification, etc., and is suitable for processing solid-state uranium waste storage fields such as uranium mines, hydrometallurgy plants and waste ore and tailings reservoirs.

The invention discloses a method for restoring and improving uranium tailing residues-contaminated soil, the employed materials comprise Aeschynomene indica, Miscanthus floridulus and Imperatacylindrica, plant ash and cow dropping, the plant ash is made by burning the Miscanthus floridulus and the Imperatacylindrica. The plant ash and the cow dropping is formulated into a mixed fertilizer in accordance with a proportion to be fertilized in a plant ditch that is built in uranium tailing residues-contaminated region, the three plants of the Aeschynomene indica, the Miscanthus floridulus and the Imperatacylindrica are planted in groups in the plant ditch. By using the method, dense vegetation can be constructed in a very short time to prominently increase soil nitrogen, organic matters and pH value, and meanwhile, the soil root density is increased and the content of soil water-soluble uranium is reduced obviously. The method has the advantages of simple operation, low cost, good efficiency of preventing the uranium from transfer and diffusion, and beautifying the environment. The technique can be used in reconstructing vegetation in a degraded ecosystem of mines and greening expressways.

The invention relates to a preparation method of biomass charcoal-based magnetic activated sludge and application of the biomass charcoal-based magnetic activated sludge to uranium-bearing wastewater treatment. The preparation method of the biomass charcoal-based magnetic activated sludge and application of the biomass charcoal-based magnetic activated sludge to uranium-bearing wastewater treatment have the advantages that the biomass charcoal-based magnetic activated sludge high in porosity, large in specific surface area, few in macroscopic defects and stable in structure is mainly prepared from cheap natural resource biomass, waste beer yeast mycelia, activated sludge of sewage treatment plants and starch and is applied to remove uranium from low-concentration uranium-bearing wastewater; the biomass charcoal-based magnetic activated sludge is free from toxicity and pollution to the environment, so that natural resource recycling is achieved; the preparation method is simple and mild in reaction condition, and the biomass charcoal-based magnetic activated sludge can enable the concentration of the uranium of the low-concentration uranium-bearing wastewater to be decreased from 0.45-0.50mg / L to be below the national discharge standard of 0.05mg / L, thereby being suitable for environmental modification of various low-concentration uranium-polluted water bodies such as the uranium-bearing wastewater produced by uranium mines and uranium hydrometallurgy plants as well as uranium ore and uranium tailing pond lixivia.

The invention provides a method for restoring uranium contaminated water body employing floating plant which adopts floating fern azolla as material to repair uranium contaminated water body. The method comprises the following specific steps: (1) planting 2.5-7.5g of azolla for each litre of wastewater which contains 1.25-10mg / L of uranium; (2) adjusting the pH value of the wastewater to 6-10; (3) taking out azolla after 9 days; (4) transferring azolla to another safe place to dry, grind and burn, and finally landfilling the obtained product in a uranium tailing warehouse for concentrated treatment. By using the method of the invention, the uranium content of the wastewater which contains 1.25-10mg / L of uranium can be reduced by 60-90%. The method has simple operation and management, high repairing efficiency, low cost, small environmental risk and good environmental benefit, social benefit and economic benefit.

The invention relates to a bioleaching method-uranium leaching from fungus. The method comprises the following steps of: using chemical reagents or fermenting low-price carbon source straws to generate fungus of organic acids of citric acid, oxalic acid, malic acid and lactic acid; and leaching uranium out from uranium tailings, tailing residues, uranium barren rocks or uranium ores by utilizing the fungus (1),or fermentation liquor (2) of the fungus, or a fungus mixed fermentation liquor (3), or by adding chemical reagents, such as sulfuric acid and hydrochloric acid to the fungus (1), or the fermentation liquor (2) of the fungus, or the fungus-mixed fermentation liquor (3). The invention has the advantages of convenient material obtainment, low cost, simple and convenient processing steps environmentally-friendly performance, energy saving and the like.

The invention discloses a method for mineralizing and cementing uranium tailing slags through montmorillonite / carbonate mineralization bacteria. The method comprises the following steps that through stress induction and irradiation methods, carbonate mineralization strains are screened and domesticated; culture for the efficient screened and domesticated carbonate mineralization bacteria is enlarged to obtain a high-concentration bacterial solution; a test of using the carbonate mineralization bacteria to cooperate with montmorillonite for cementing the uranium tailing slags is developed, andporosity, compressive strength, permeability coefficient and radiation performance parameters of the mineralized uranium tailing slags are detected. The method for mineralizing and cementing the uranium tailing slags through the montmorillonite / carbonate mineralization bacteria has the advantages that the uranium tailing slags can be more effectively subjected to in-situ closing and cured, radon gas migration and diffusion which are caused by disintegration of harmful metal ions and radioactive elements in the uranium tailing slags are blocked from the source, and the curing effect is furtherimproved.

The invention discloses a method for bonding uranium tailing slag by using a carbon-nano-material-immobilized mineralization bacterium. The method is characterized by comprising the following steps: culturing Sporosarcina pasteurii in a liquid culture solution to prepare a high-concentration bacterium solution with the concentration of 1-1.5*10<10> / ml; taking 100g of uranium tailing slag, spraying 5-20ml of 1mg / ml carbon nano material water solution, evenly mixing, and standing for 24 hours; adding 10-30ml of high-concentration bacterium solution, evenly mixing, standing for 2-3 hours, and sucking out the residual bacterium solution; adding 50ml of mineralization culture solution, culturing at 27-33 DEG C for 24 hours, and sucking out the mineralization culture solution to obtain the uranium tailing slag subjected to bonding treatment; repeating the process 5-10 times; and standing the uranium tailing slag after the last time for bonding treatment at 27-33 DEG C for 10-20 days, and bonding the uranium tailing slag into a block with certain permeation resistance and mechanical properties under the mineralization action of the microbe.

The invention relates to a plant uranium mining method, which is a method achieved as follows: high-biomass uranium-enriched plants are used for enriching uranium in uranium tailings, tailing residues, uranium waste rock, low-grade uranium mine, and uranium-mineralized soil which are stacked on the ground surface to the overground parts of the plants, the uranium is intensively harvested and driedafter being enriched to a certain extent, and then uranium-containing biologic minerals are formed after the uranium is incinerated at high temperature. The method comprises the following concrete steps: (1) screening the high-biomass uranium-enriched plants; (2) sterilizing seeds; (3) potting, transplanting seeding to uranium-containing substrates; (4) intensively harvesting and drying the uranium after the uranium is enriched to a certain extent in plant bodies; and (5) incinerating the harvested plant bodies at high temperature, wherein ash component generated by incineration are the uranium-containing biologic minerals. The invention has the advantages of convenient material obtainment, low cost, simple processing step, favorable environment, energy saving, no destruction and the like.

The invention discloses a method for repairing soil contaminated by uranium tailings uranium and associated heavy metal by passivation of phosphorous-containing compounds. The method for repairing thesoil contaminated by uranium tailings uranium and associated heavy metal by passivation of the phosphorous-containing compounds comprises the steps that step one, phosphorous-containing compounds screening is carried out; step two, uranium tailings contaminated soil uranium and associated heavy metal passivation treatment is carried out; and step three, plants with uranium and associated heavy metal tolerance, small amount of enrichment and mainly enrichment in roots are screened and utilized, the plants are cultivated according to various varieties planting requirements, contents of a uranium and associated heavy metal effective state in uranium and associated heavy metal low concentration contaminated areas can be reduced, and agricultural products with edible safety are harvested and better earnings are obtained.

Provided is a uranium tailings decommissioning environment management effect assessment method based on a three-scale analytic hierarchy process. Based on the conventional environment management performance assessment method, a uranium tailings decommissioning environment management effect assessment system is established. The weight is determined by employing the three-scale analytic hierarchy process, a comparison matrix is improved, the consistency test is avoided, the iteration frequency is reduced, and the convergence speed is increased; a membership function is established by employing a triangle distribution function; and the decommissioning environment management effect comprehensive assessment is conducted, the management scheme is improved, and the management effect is improved.

The invention discloses a pretreatment method for low-grade uranium ore. (1) Iron tailings, a sulfonate anionic surfactant and manganese dioxide are weighed, mixed, grinded and sieved to obtain iron tailings grinded powder; (2) the iron tailings grinded powder is dissolved in water, stirred, dried to constant weight and grinded to obtain an active iron tailings oxidant; (3) uranium tailings and the active iron tailings oxidant are weighed, mixed, grinded and sieved to obtain uranium ore grinded powder; and (4) the uranium ore grinded powder is dissolved in water, stirred, microwave dried to constant weight and grinded to obtain modified low-grade uranium ore. The pretreated modified low-grade uranium ore is leached in a sulfuric acid solution of 10 g / L for 12 hours, and an uranium leachingrate is as high as 98%. Untreated low-grade uranium ore is leached in a sulfuric acid solution of 50 g / L for 168 hours, and an uranium leaching rate is only 49%. The pretreatment method of the invention is simple and has no secondary pollution, and the used raw materials are inexpensive.

The invention relates to an in-situ treatment and recycling technology for treating microorganisms of low-concentration uranium-containing wastewater by utilizing galvanotactic microorganisms, in particular to a method for treating / recycling uranium in low-concentration uranium-containing wastewater, which utilizes a microbial strain and a surfactant to prepare a galvanotactic microorganism preparation, and then utilizes the galvanotactic microorganism preparation to treat the low-concentration uranium-containing wastewater. The method comprises the following steps: (1) the galvanotactic microorganism preparation is prepared by adopting polyphosphate leifsonia, screening and purifying the peripheral soil of an uranium tailings pond, obtaining a native leifsonia strain, inoculating the native leifsonia strain which is cultured to logarithmic phase into a fermentation tank, adding alkyl phosphate salt anion surfactant, regulating the content of the anion surfactant to be 8 to 10 percent,and obtaining the galvanotactic microorganism preparation; and (2) mixing the obtained microbial strain and the low-concentration uranium-containing wastewater, uniformly stirring, applying an electric field to the wastewater, and treating and recycling the uranium by virtue of an adsorption reaction under the collective effect of the microbial strain and the electric field.

The invention discloses a three-dimensional numerical simulation method for hydraulic characteristics of a uranium tailing pond flood drainage system. The method comprises the following steps: collecting, analyzing and checking basic data of the uranium tailing pond flood drainage system; selecting suitable numerical simulation software; establishing a three-dimensional numerical model of the tailings pond flood drainage system and dividing grids according to regions; boundary conditions of an inlet and an outlet of the uranium tailing pond flood drainage system are determined; carrying out numerical simulation by adopting a model subjected to experimental research, comparing with a model test result, and verifying, calibrating and optimizing a numerical model according to a comparison result; performing three-dimensional numerical simulation on the uranium tailing pond flood drainage system; and related data of the drainage capacity, the wall surface pressure, the water flow velocity,the water depth and the flow state of the uranium tailing pond flood drainage system are given. By establishing the three-dimensional numerical model of the uranium tailing pond flood drainage system, the scale effect of a model test does not need to be considered, the limitation of a theoretical formula method in the aspects of arrangement mode and structural size of the flood drainage system issolved, and the method is low in cost, short in period and high in simulation precision.

The invention relates to a method for remediating uranium-contaminated soil by virtue of woody plants. The method for remediating the uranium-contaminated soil by virtue of the woody plants specifically comprises the following steps: branches of American bamboo-willow No. 3 are directly cut in the uranium-contaminated soil, and survive and grow, the American bamboo-willow No. 3 absorbs uranium in the soil into the own bodies of the plants during a growth process and transfers uranium to overground parts, and the overground parts are harvested and subjected to centralized treatment, so that uranium in the uranium-contaminated soil is reduced; and meanwhile, lots of uranium can also be fixed in roots of the American bamboo-willow No. 3, so that migration and diffusion of uranium are reduced. The method is applicable to remediation for uranium-contaminated soil in the peripheries of places such as uranium mines, uranium hydrometallurgical plants, uranium waste-rock yards and uranium tailing reservoirs.

The invention discloses a uranium tailing pond dam break three-dimensional numerical simulation method based on computational fluid mechanics, and belongs to the field of uranium tailing pond safety.The method comprises the following steps: collecting basic data of a uranium tailing pond, and establishing three-dimensional models of a reservoir area, a dam body and a river within a certain downstream range of the uranium tailing pond by utilizing three-dimensional modeling software; dividing grids of the three-dimensional model according to regions, and determining boundary conditions of thetop of the uranium tailing pond and a downstream river channel; selecting a numerical simulation solving method; comparing a numerical simulation result with a model test result, verifying, calibrating, and optimizing the numerical model; drawing up a calculation scheme, and calculating dam break influence consequences of different dam break types by adopting the optimized three-dimensional numerical model; and analyzing the reliability and reasonability of a calculation result, and giving related data of a flow field, debris flow depth, flow and flow velocity change process of a calculation region. Three-dimensional numerical simulation is applied to uranium tailing pond dam break research, the method is low in cost, short in period and high in simulation precision, and the influence of uranium tailing pond dam break can be visually checked.

The invention discloses a method of sorting low grade uranium ores by a dense medium cyclone. The method comprises the following steps: carrying out first section screening after coarsely crushing andfinely crushing raw ores to obtain ores, the granularity of which is smaller than or equal to 5 mm, wherein the ores, the granularity of which is greater than 5 mm, are returned to be finely crushed;carrying out second-section screening on the obtained ores to obtain ores, the granularity range of which is 0.3-5 mm, wherein the ores, the granularity of which is smaller than 0.3 mm, are treated as tailings; feeding the ores, the granularity range of which is 0.3-5 mm, into the dense medium cyclone to be sorted, wherein heavy minerals and light minerals are separated effectively by means of aheavy suspension in the dense medium cyclone and are discharged from ore discharge ports, respectively; and feeding the discharged heavy minerals and light minerals into medium-removing and dehydrating steps respectively, wherein the obtained heavy minerals are uranium concentrate and the obtained light minerals are uranium tailings. The method provided by the invention has the advantages of beingsimple in process, low in cost, large in handling capacity, high in sorting precision, high in enriching ratio and the like, and the operating cost of the dense medium cyclone is low.

The invention discloses a method for remedying uranium tailing radioactivity and heavy metal contaminated soil by utilizing a biotechnology. The method comprises the technical steps of: a first step of selecting uranium and associated heavy metal enriched plants; a second step of preprocessing seeds of the uranium and associated heavy metal enriched plants; a third step of planting the uranium andassociated heavy metal enriched plants; a fourth step of prompting uranium and associated heavy metal enrichment of the plants; and a fifth step of carrying out rapid volume reduction, weight reduction and minimization processing on the uranium and associated heavy metal enriched plants. The method for biologically remedying the uranium tailing radioactivity and heavy metal contaminated soil is advanced in technology, easy to operate, convenient to operate and low in cost, and provides a new technical approach for radioactivity and heavy metal double contaminated soil in regions of uranium tailings, a uranium waste-rock yard, an ex-service uranium mine and the like.

The invention relates to a preparation method of an electrophilic microbial preparation and application of the electrophilic microbial preparation in treatment of uranium-containing wastewater. According to the preparation method of the electrophilic microbial preparation, a microbial strain and a surface active agent are used, and leifsonia polyphosphate is adopted as the microbial strain; the method comprises the steps of screening and purifying soil around an uranium tailings pond to obtain native leifsonia, culturing the native leifsonia for a logarithmic phase and then inoculating the cultured native leifsonia into a fermentation tank, adding an anionic surfactant, and adjusting the content of the anionic surfactant to 8-10% so as to obtain the electrophilic microbial preparation. Theinvention provides the microbial preparation which is green, cheap and practical and can be used for in-situ treatment and recovery of uranium in the uranium-containing wastewater. The electrophilicmicrobial preparation can effectively enhance the electrotaxis of microorganism and increase the uranium recovery efficiency.

The invention discloses a wireless sensor network-based system for monitoring and early-warning of land and water pollution by uranium tailings. The wireless sensor network-based system comprises information acquiring and early warning nodes distributed in a target monitoring area, a relay node, monitoring base stations, a remote server and a monitoring platform, the relay node is connected with a plurality of monitoring base stations to form a chain type network, and the remote server is connected with the monitoring platform, which is a software platform runs early warning system and displays environmental radioactivity pollution parameter and alarm information of corresponding areas. The system can acquires radioactivity information of water and land in monitored areas on a real-time basis, so that a company and an environmental protection department can timely know the radioactivity pollution information of uranium tailings. The pollution intensity and positions are shown and recorded. The system facilitates uranium tailings radioactivity pollution monitoring and management, and ensures great economic and social benefits. Better information service and technical support are provided for intelligent environmental protection.

The invention discloses a technology for controlling radon and radon progeny uranium mining and metallurgy airborne radiation contaminations through artificial algae crusts. The technology comprises the following steps that first, radon and radon progenies are selected to enrich algae; secondly, algae crust breeding germplasms are prepared; thirdly, the artificial biological algae crusts are planted; fourthly, the artificial biological algae crusts are maintained. The technology for controlling the radon and radon progeny uranium mining and metallurgy airborne radiation contaminations throughthe artificial algae crusts is advanced, the method is easy to implement, the operation is convenient, the cost is low, and a new technological approach is provided for controlling the airborne radiation contaminated environments in a uranium tailings area, a uranium waste-rock yard, a uranium mine close-down area and the like.

The invention discloses an artificial simulation climate box for monitoring uranium tailing sand. The artificial simulation climate box comprises an artificial climate box body with a columnar box body structure, an artificial rainfall simulation system, an illumination and temperature and humidity control system and a radon measurement module; the artificial climate box body comprises a soil sample placing area at the bottom end and a radon collecting cover above the soil sample placing area; the radon collecting cover is in circular sampling connection with the radon measurement module through a gas guide pipe; the artificial rainfall simulation system comprises a water storage tank and an atomizing nozzle connected to the water storage tank; the atomization nozzle is fixedly installed in the radon collection cover, rainfall simulation is achieved by controlling the flow of the atomization nozzle, the illumination and temperature and humidity control system is composed of a constant-temperature water bath interlayer and a xenon long-arc lamp, control and adjustment of the temperature of the system are achieved, and a ventilation module and a program control system are additionally arranged to improve operation convenience and safety controllability. By means of the above structural design, operators can analyze radon precipitation more safely, conveniently and accurately whensimulating natural conditions.

The invention discloses an ecological purification treatment system and treatment method for low-level uranium-containing waste water. The ecological purification treatment system for the low-level uranium-containing waste water is a layered structure and is composed of an enriched plant absorption layer with the thickness of 20-30 cm, a modified zeolite purification layer with the thickness of 20-30 cm, and a gravel water collecting layer with the thickness of 20-30 cm from top to bottom, PVC drip irrigation pipes with the thickness of 1 cm are arranged on the system, and a drip irrigation pipe network is formed with the pipe-to-pipe spacing of 50 cm; a perforated drainage pipe is arranged in the gravel water collecting layer. The low-level uranium-containing waste water passes through the drip irrigation pipe network and passes through the enriched plant absorption layer, the modified zeolite purification layer and the gravel water collecting layer to be treated and purified for 3-5hours from to bottom, and purified outlet water is discharged from the perforated drainage pipe in the gravel water collecting layer. The ecological purification treatment system and treatment methodfor the low-level uranium-containing waste water can effectively solve the double pollution problems of uranium radioactivity and heavy metal toxicity in radioactive polluted water bodies of uranium mining and metallurgy, uranium tailing and the like at low cost.

The invention discloses a method for detecting Bidens maximowicziana Oett uranium pollution by taking an arabidopsis oligonucleotide fragment as a probe, comprising the steps of: hybridizing the total RNA (Ribose Nucleic Acid) extracted from the Bidens maximowicziana Oett in a uranium tailing area and a non-polluted contrast area with a 29KArabidopsis Genome Array chip to determine a specifically expressed up-regulated gene as the probe for detecting the uranium pollution; and hybridizing the total RNA extracted from the Bidens maximowicziana Oett in an environment to be detected and the non-polluted contrast area with the 29KArabidopsis Genome Array chip to detect whether a specifically expressed arabidopsis isogenous up-regulated gene exists or not, so as to know whether the Bidens maximowicziana Oett in the environment to be detected is polluted by the uranium or not. The detection method can perform safe detection far away from the polluted environment, solve the problem that the uranium pollution in the environment around the polluted area is difficult to detect correctly as well as correctly determine the pollution source and whether the environment is polluted or not, and has high sensitivity and undivided specificity of aiming at the uranium pollution only.

The invention discloses a technology for treating radon and radon progeny uranium mining and metallurgy airborne radioactive pollution through moss artificial surface crusting. The technology comprises the steps that one, radon and radon progeny enriched moss plants are selected; two, moss surface crusting germplasm is prepared; three, moss artificial surface crusting planting is conducted; four,moss artificial biological surface crusting caring is conducted. According to the technology, the uranium mining and metallurgy airborne radioactive pollution of radon and radon progeny and the like is treated through the moss artificial surface crusting, the technology is advanced, the implementation of a method is easy, the operation is convenient, the cost is low, and novel technological approaches are provided for the environmental treatment of the airborne radioactive pollution of uranium tailing, uranium wasted stone field, uranium mountain retirement regions and the like.

The invention discloses a method for evaluating environmental pollution degree of uranium tailings percolation leaching, comprising the following steps: respectively placing uranium tailings samples into a 9K medium and an ABS + S medium, calculating pollution evaluation index values of different sampling points of uranium tailings and waste rock tailings to the surrounding soil environment by using measured average iron oxidation rate, hydrogen ion concentration and acid production concentration, and comparing the pollution evaluation index values with the judgment standard to obtain the pollution degree of a certain uranium tailings piled up for a long time to the surrounding soil environment.

The invention provides a method for separating scandium and uranium from scandium-containing uranium ore. The method comprises: crushing and grinding raw ore with the particle size of-2 mm until the number of -200 meshes accounts for 65%-70%; adding the ground particles into a strong magnetic separator for magnetic separation to obtain scandium-containing concentrate and uranium-containing tailings, and collecting the scandium-containing concentrate; leaching the uranium-containing tailings through an acid solution to obtain a uranium-rich acid solution and tailings, and separating the uranium-containing acid solution from the tailings; and enriching scandium through a physical method, then collecting uranium through hydrometallurgy, and achieving separation-smelting combination . The method has the advantages of being easy to operate, high in separation precision and high in enrichment ratio.

The invention discloses a testing device for the permeability of uranium tailing and underlying rock-soil layer of a uranium tailing pond and a trial assembly method. The testing device comprises a gas pressure-regulating injection system, a liquid pressure-regulating injection system, a pressure measuring system, an excitation system, a pressure returning system, a flow metering system, a data acquisition unit and a calorstat which are connected by pipelines.By adoption of the testing device, the underground environment is simulated to test the permeability of gas-liquid mixture, single gas and single liquid of the underlying rock-soil layer and the uranium tailing of the uranium tailing pond under different depths, temperatures and vibration frequencies and the change rules of the permeability along with the time so as to provide theoretical basis for estimation on the environmental protection and seepage-flow stability of the uranium tailing pond.

The invention relates to a method for preventing and controlling migration of heavy metal pollutants in uranium tailings by plants. Five plants, namely Rhus chinensis, Trema orientalis, Buddleja officinalis, Melilotus officinalis and Pouzolzia zeylanica which have strong drought resistance and can retain different heavy metals are planted in a matching way, and applied with plant carbon and phosphate fertilizer at the same time so as to establish vegetation in a uranium tailings polluting area in a short time. Through reestablishment of the vegetation, the nitrogen content of the polluted soil is obviously increased, and the contents of the water-soluble heavy metals such as uranium are obviously reduced. The plants selected by the method are all planted locally, so the materials are easily taken, and the plants are easily planted and quickly grown; moreover, the method has the advantages of having good efficiency for controlling pollution, improving the soil, beautifying the environment, and the like. The method can be used for controlling heavy metal pollution and reestablishing vegetation of various mine degraded ecosystems.

The invention belongs to the technical field of uranium tailings pond safety, and specifically discloses a vacuum pre-compression water-drainage consolidation method for uranium tailings mud, which improves safety of a tailings pond; and according to construction effect detection, shear strength of a vacuum pre-compressed tailings mud cross plate and bearing force of a site foundation are remarkably improved. The method provided by the invention can prevent a governed tailings pond beach face from long-term uneven settlement, effectively reduces water percolating capacity of a tailings pond dam body, reduces water seepage treatment cost of the tailings pond dam body, and shortens a period. The treatment cost of the vacuum pre-compression water-drainage consolidation method can be saved once or more in comparison with that of methods such as a surcharge preloading method, and safety is high. The construction process is simple, is low in requirements on equipment, is low in cost, and caneffectively improve long-term stability of the tailings pond. The vacuum pre-compression water-drainage consolidation method is wide in range of application, is suitable for the uranium tailings pond, and also can be applied to treatment of other mine tailings mud.

The invention discloses uranium-related gene segments of pokeweed. The method for acquiring the gene segments comprises the following steps: extracting total RNA from root tissues of pokeweed in uranium tailings region and non-polluted contrast region, synthesizing a first chain and a second chain of cDNA by enzymatic reaction reverse transcription, carrying out suppression subtractive hybridization to separate gene segments with specific expression under heavy metal uranium stress, using the gene segments as probes and enabling the gene segments and RNA extracted from pokeweed in detected environment to hybridize, or using sequences of two ends of the gene segments with specific expression as primers to carry out reverse transcription-polymerase chain reaction to detect the cDNA of pokeweed in the detected environment. In the invention, gene with specific expression induced by uranium in pokeweed is used as a probe to detect uranium pollution, solving the problem of inaccurate detection of uranium pollution in surrounding environment of uranium-polluted areas.