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.

The remediation of groundwater environment in the post-mining area at in-situ leaching uranium mines has aroused widespread public concern. The long-term change of groundwater U concentration in the post-mining area is still unclear. Field investigation and numerical simulation methods were comprehensively used in this study, and a typical post-mining area of a “CO₂+O₂” in-situ leaching uranium mine in northern China was taken as the research object. On the basis of identifying the distribution characteristics of groundwater U in the post-mining area, the natural attenuation trend of U in groundwater at different times was quantitatively predicted, and the long-term change of U concentration was quantified. The results show that the concentration of U in the groundwater in the post-mining area is 0.273~5.24 mg/L, and the sampling points with U concentration lower than 2.5 mg/L accounted for 64%. The simulation results show that in the post-mining stage, the groundwater flow direction tend to the regional groundwater flow direction. When the natural attenuation process of U is not considered, U in groundwater migrate to 167 m downstream after 100 years of final mining, and the predicted migration distance is conservative. When the natural attenuation of U is considered, the migration distance of U is only 42 m after 100 years of final mining. The concentration of U in the groundwater in the mining area is reduced from the initial 2.5 mg/L to below 1.0 mg/L. Natural attenuation can reduce the migration distance and the concentration of groundwater U in the post-mining area, and the monitored natural attenuation (MNA) technology can be used as an alternative scheme for groundwater remediation at in-situ leaching uranium mines in the future.

Due to the influence of special mining technology in open-pit mines, shoveling equipment is prone to safety accidents during operation. Aiming at the problems of large inspection blind area and untimely response in the management of shoveling equipment in open-pit mine enterprises, a high slope and cross operation control scheme of shoveling equipment is proposed based on high precision positioning technology. The high slope operation control scheme combines terrain data, uses positioning technology, through on-site measurement and operation scheduling, real-time monitoring and alarm, on-site processing and record verification, real-time monitoring of the operation height of the shoveling equipment and judging whether it exceeds the safety range. The cross operation control scheme of shoveling equipment monitors the operation spacing in real time through the confirmation of operation spacing before operation, the audit of scheduling plan and the inspection of operation spacing. The proposed control scheme realizes the safe and fine management of the operation spacing and excavation height of the shoveling equipment, effectively reduces the risk of accidents in the process of open-pit mining, and improves the operation efficiency.

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.

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.

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%.

The in-situ leaching wastewater of uranium mining and metallurgy is characterized by large volume, acidity, and low radioactivity, etc. The evaporation ponds of some uranium mining and metallurgical enterprises cannot meet the demand of expanding production. The advantages and disadvantages of forced evaporation technology such as vacuum evaporation, three-effect evaporation and MVR(Mechanical Vapor Recompression) evaporation were compared and analyzed. It was found that, under long-term use, MVR technology has higher efficiency, lower exhaust emission, and lower energy consumption, making it relatively more suitable for in-situ leaching wastewater. Based on MVR technology, a fully integrated control forced evaporation system was designed and constructed. The heating temperature and material of the equipment were determined according to the waste liquid composition. The on-site device achieved automatic control of temperature, pressure, and liquid level, as well as continuous cyclic evaporation. The actual test shows that the evaporation capacity and efficiency coefficient of the device are positively correlated with the evaporation temperature.

To address the wastewater treatment issue in electrode uranium plating process, an evaporation concentration device suitable for the special requirements of this process has been developed, which can effectively reduce the discharge of radioactive process wastewater. The principle of this device is to vaporize the water in the waste liquid through micro-vacuum distillation, condense it back into liquid water, and then discharge it externally. The remaining concentrated water and solid in the evaporator are treated as radioactive solid waste. Considering the actual application scenarios, leak-proof foundation pits are set up to address equipment failure or emergency shower problems. The device uses neutralizing tanks to handle the acidity and alkalinity of the waste liquid, and is equipped with a detection port to ensure that the waste liquid after condensation meets the emission standards.

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.

Taking a domestic uranium mine as the research object, a three-dimensional geological initial model of the deposit was constructed by the basic data such as drilling location, inclinometry, samples, and lithology for geological exploration of the deposit, and the resource reserves of the deposit were estimated. According to the deposit exploration, production exploration, and mining processes, the three-dimensional geological model, resource types, and development status of the ore bodies/blocks were dynamically updated. The logical relationships among three-dimensional models of mineral deposits at different times was constructed to realize the automatic monitoring of mineral resource retention, changes, and reasons for changes, in order to grasp the background of mineral resource quantity. The research on resource utilization was carried out, the annual and cumulative leaching rates was calculated, the recoverable reserves (confirmed reserves) of ore bodies/blocks were predicted based on mining production data, and the targeted resource utilization plans for different ore bodies/blocks were proposed accordingly to improve the resource utilization efficiency of the mine.