The design of injection and extraction fluid volume is closely related to both the effective leaching range of the lixiviant and the operational cost of the well field. To facilitate economically efficient decision-making regarding injection and extraction fluid volume in the "horizontal well-vertical well" system within the in-situ leaching uranium mining domain, a simulation-based optimization decision method for the "horizontal well-vertical well" system is proposed, leveraging multi-objective optimization algorithms. The research indicate that, compared to the initial scheme of uniformly distributing injection and extraction fluid volume, the decision scheme R2 achieves an 8.84% increase in the leaching range while reducing operational costs by 51.14%. This method has identified four "key wells" in the LK mining area, emphasizing the importance of closely monitoring the flow rates of such wells during scheme decision-making and adjustments. Based on the Pareto solution set derived from the multi-objective optimization, six combinations of injection and extraction operational schemes with varying effective leaching ranges and cost-weight ratios are selected to guide decision-makers in their scheme selection.

For a multi-layer sandstone-type uranium ore in an in-situ leaching uranium mine in Inner Mongolia, four experimental methods of layered injection and layered extraction, layered injection and mixed extraction, mixed injection and layered extraction, mixed injection and mixed extraction were designed. The amount of injected liquid, leaching situation, advantages and disadvantages of each schemes were analyzed. The feasibility of single well layered injection was explored, and the key technology of single well layered extraction was solved. The results show that the layered injection and layered extraction method has the fastest increase in uranium concentration of the leachate, the best leaching effect, and lower construction cost, which has good application and promotion prospects.

In order to improve the efficiency of uranium extraction by the moving bed adsorption tower, Fluent and Edem software were used to simulate the process of uranium extraction by the moving bed adsorption tower. By adjusting the inlet flow rate, and observing the movement of resin particles, the distribution state and the settling of saturated resin in the moving bed adsorption tower, the optimal inlet flow rate was analyzed and obtained. The accuracy of the simulation results was verified by building an experimental platform, and the comparative analysis of the experimental data with the numerical simulation results confirmed the consistency of the two conclusions, thus verifying the accuracy and applicability of the model. The results show that the optimal inlet flow rate is 4 m³/h. At this flow rate, the extraction efficiency of uranium ions is maximized, which provides an important design parameter for the future design of moving bed adsorption tower.

In order to study the influence of heterogeneous strata on blasting, the stratigraphic factors and coupling methods were analyzed, and the thickness, density and dip angle of the rock strata were numerically studied by different coupling methods. The results show that the increase of the thickness of the middle sandstone and the increase of the density of the upper and lower layers will inhibit the crack propagation, and the inclined sandstone rock layer will produce horizontal and oblique staggered cracks, and the water-coupled charge blasting can protect the blast hole and increase the effective stress of the blast stress wave, and the selection of appropriate uncoupling coefficient can increase the energy transmitted by the blasting stress wave. The blasting force of the cracker is greater, and the addition of a warhead can form an initial crack and guide further crack propagation. Designing a reasonable scheme according to the formation condition can improve the blasting and permeability efficiency.

The data related to mine resource reserves is extensive and subject to frequent changes. Traditional resource reserve management system typically handles singular data types, which leads to low operational efficiency among personnel and increases the risk of data loss. In response to national policies advocating for the use of three-dimensional digital methods in resource reserve management, and to address the challenges in controlling resource reserve data caused by weak informatization equipment and infrastructure, the Shitoumei No. 1 open-pit coal mine in the Santanghu mining area of Hami, Xinjiang, has actively promoted intelligent construction. The mine has implemented a three-dimensional dynamic management system for mineral resource reserves, designed using a combination of B/S and C/S architectures. This system is based on digital three-dimensional models that calculate and display dynamic changes in data during production processes in real time. The resource reserve management system operates on a logical architecture of data storage, platform services, and application services, enabling refined management across mining ledgers, data management and reporting, mining rights, exploration activities, and coal quality. Since its deployment, the system has been performing well, reducing the discrepancy rate in coal output design by 16%, achieving a 100% rate of centralized data control, and significantly enhancing the accuracy of resource reserve evaluations. The system has improved the overall efficiency of resource reserve management and advanced the informatization of open-pit coal mine reserve management within the company.

Traditional natural uranium storage relies on manual forklifts or cranes for unloading and storage, which suffers from drawbacks such as high labor intensity, low efficiency, high radiation exposure for personnel, high risk factors, low warehouse utilization, inefficient inventory management, and unreliable accuracy. Aiming to address these issues, an intelligent vertical storage system is designed to achieve efficient vertical storage, automatic retrieval, real-time querying, and rapid inventory.Compared to the stacker crane + shuttle scheme, the dual extended stacker crane scheme offers superior performance in inventory efficiency, network transmission, equipment reliability, maintenance methods, and shelf structure requirements. Based on this analysis of intelligent natural uranium storage processes and optimized equipment selection, a smart vertical storage solution tailored for natural uranium storage has been researched and designed.

The uranium purification and conversion line will produce sodium diuranate precipitation and impurity residue. In order to recover the metallic uranium and reduce the waste mass, the uranium metal was recovered from these uranium-containing precipitates by nitric acid direct leaching and calcination-nitric acid leaching method. The content of impurity ions in the leaching solution were analyzed, and the main factors affecting the leaching rate of uranium were determined. Under the optimum conditions, the leaching rates of uranium by calcination-nitric acid leaching and direct nitric acid leaching are 98.14% and 96.11% respectively, and the mass of uranium-containing precipitates can be reduced by about 85%~90%.

According to the emission of pollutants during the operation of a reduction ilmenite (associated radioactive ore) project, the individual effective doses of different exposure routes on the surrounding public were predicted, and the contribution of different exposure routes were analyzed, to provide a reference for estimating the radiation dose of the project to the public. The results show that the maximum individual effective dose of the public members was 0.09 mSv/a, and the key exposure route was radon inhalation irradiation, which contributed 80.6%.The contribution share of ingestion exposure was 17.8%, the contribution of internal exposure due to radionuclides inhalation was 1.6%. The radiation impact of the project on the surrounding public meets the relevant standard requirements. Compared with radon inhalation exposure, the contribution of ingestion and inhalation exposure is smaller, but it cannot be ignored.

To investigate the influence of factors such as slope ratio, rainfall intensity, and protection form on the erosion characteristics of dam slopes, a full-scale artificial rainfall simulation test platform was built to simulate the runoff and sediment production processes on slopes with different slope ratios, rainfall intensities, and protection forms. The differences in runoff and sediment production on slopes under different operating conditions were analyzed. The results show that the starting time of runoff decreases with the increase of slope ratio and rainfall intensity, and is greatly affected by rainfall intensity. The trench drainage protection, due to the formation of slope runoff channels, advances the time of runoff generation. The grass planting and gravel slope protection on the slope reduce the response of the slope to rainfall to varying degrees, resulting in a significant delay in the start time of runoff generation. The rainfall intensity has the most significant impact on the runoff yield. The rainfall intensity increases from light rain to rainstorm, with the runoff yield increasing by 7.6 times, the sediment yield increasing by 18.5 times, and the time for the sediment yield to reach its peak reduced by about 75%. The ditch drainage slope protection forms a runoff channel, resulting in the maximum flow rate on the slope surface. The grass planting slope protection and gravel slope protection can significantly reduce the sediment yield on the slope surface. The grass planting slope protection improves the physical and chemical properties of the soil to a certain extent, increases the porosity of the soil, increases the infiltration rate of the slope surface, makes the runoff process smoother, and has better erosion resistance.

A pretreatment process for uranium containing waste liquid was proposed to address the issues of nanofiltration membrane blockage and ion exchange resin poisoning in the treatment of uranium containing waste liquid. On the basis of determining the optimal process parameters for chemical precipitation and organic matter decomposition in the laboratory, engineering design and verification were carried out. The results show that after pretreatment, the turbidity of the waste liquid can be reduced to 16.25 NTU (removal rate of 98.74%), and COD can be reduced to 110.25 mg/L (removal rate of 87.13%). The waste liquid after pretreatment meets the water quality requirements of nanofiltration and ion exchange resin, and the pretreatment process effectively solves the problems in the treatment of uranium containing wastewater during uranium conversion.