The core equipment of the stable rotation method for separating ⁷⁶Ge isotopes is the stable rotation machine. The normal and stable operation of the stable rotation machine is a key element to ensure the smooth progress of the entire production process. The main indicator for measuring the normal operation of the stable rotation machine is whether the speed of the stable rotation machine per minute is within a reasonable range, which is monitored by the stabilizer speed measurement system. Since the official launch of the speed measurement system, its performance in monitoring the speed and friction power consumption of the stable rotation machine has been outstanding. However, there is a drawback that when the system detects abnormal speed data of the stable rotation machine, it fails to automatically trigger the program to protect the stabilizing machine. In response to this deficiency, this article elaborates on the various functions of the speed measurement system, delves into the problem of the speed measurement system being unable to automatically execute protection programs when monitoring abnormal situations in the stable rotation machine, realizes the data communication docking between the speed measurement system and the DCS system based on MODBUS/TCP protocol, and completes the corresponding configuration programming work in the DCS system. After using the improved rotating speed measurement system, once the system detects fault protection signals such as single unit out of step/group out of step, single unit damage/group damage in the stabilizing machine, these signals will be transmitted in real time to the DCS control system. The DCS system immediately issues an accident alarm and activates the protection interlock program, successfully solving the problem of the speed measurement system being unable to protect the stabilizing machine in abnormal situations, effectively preventing damage to the stable rotation machine, and improving the safety performance of the system.

According to the national policy of developing green mining and building green mines as an important platforms and means for transforming the development mode of mining, enhancing the overall image of the mining industry, and promoting the safe and sustainable development of the mining industry, as well as the requirements of the State Security Bureau to carry out the "mechanization replaces people, automation reduces people" science and technology strengthen safety special action, the company has completed the "mechanization" transformation and has continued to carry out intelligent mine construction. Based on the pain points of safety in mining, such as high labor intensity, poor working environment, and high safety risks, the company has carried out intelligent mine construction projects, including unmanned driving of electric vehicles, remote control of loaders, remote control of crushers, and automation of ventilation and drainage. Through the transformation and upgrading of "digitalization" and "intelligentization", the company gradually achieves "minimization of personnel" or "unmanned operation" underground, improving the working environment and reducing labor intensity while further enhancing the intrinsic safety of hard rock uranium mining.

The casing for in-situ leaching uranium needs to take into account the anti-corrosion performance and pressure resistance. In view of the complex geological conditions of dense sandstone uranium deposits, the performance of casing made of three materials, namely unplasticized polyvinyl chloride(UPVC), carbon steel and glass fiber reinforced plastic(GFRP), had been comparatively investigated. The results show that UPVC casing has good corrosion resistance but poor pressure resistance; carbon steel casing has good pressure resistance but is easy to corrode and has high cost; GFRP casing is excellent in corrosion resistance, pressure resistance and tensile strength. In terms of cementing quality, the cementing strength of GFRP casing, carbon steel casing and UPVC casing with cement is 1.80, 2.91 and 0.32 MPa respectively, and the cementing strength of GFRP casing with cement shows obvious advantages. GFRP casing is the best choice for in-situ leaching uranium in dense sandstone uranium deposits, which can meet the requirements of anti-corrosion performance and pressure resistance, and can guarantee the quality and service life of the drilling.

With the development of uranium mining, uranium mining technology has rapidly advanced, but various challenges have emerged. In the process of in-situ leaching of uranium, there is often a phenomenon of decreased pumping and injection volume, which seriously affects the efficiency of uranium leaching. In response to the problem of decreased pumping and injection volume, physical, chemical, and combined well cleaning techniques have been carried out. The washing technology can solve the blockage around the wells, but its washing effect lasts for a short time and has a small impact radius, which cannot fundamentally solve the problem of decreased flow rate. The liquid flow cavitation technology is widely used in petroleum extraction, which can effectively increase the production of pumping wells and reduce the pressure of injection wells. However, it has not been involved in the in-situ of uranium process. In this paper, by comparing the difference between uranium leaching technology and petroleum technology, the cavitation device is optimized, and the drilling wellhead device is improved in the ground test, and then the liquid flow cavitation test is carried out. During the test, the operation displacement reached 2 m³/min and the pressure was about 21 MPa, which verified the feasibility of liquid flow cavitation technology in in-situ of uranium, and provided a new idea for improving the permeability of uranium mine.

The data of mineral resources reserves is the focus of the management of mineral resources reserves, and the national survey of mineral resources is a national and basic survey of mineral resources. Based on the national survey database of mineral resources in Henan Province, it is necessary to study and put forward a method to quickly update the resource reserve data in the mineral resources reserve database to facilitate the efficient use of the mineral resources management department, which is necessary to solve many problems such as data missing, error, redundancy and low timeliness in the reserve database and to better manage the mineral resources. By designing a computer program algorithm, the resource reserve data records in the national survey database of mineral resources and the mineral resource reserve database were automatically compared according to the relevant fields, and the differences were found. According to the differences, different program codes were adopted to update the resource reserve data in the reserve database. Compared with the method of manually updating data in daily reserves management, this method can update the resources and reserves data in the mineral resources and reserves database more comprehensively, quickly, efficiently and accurately.

Low-permeability sandstone uranium mine, with its poor permeability and high injection difficulty, has brought great challenges to the traditional in-situ leaching mining technology. In view of the current low permeability uranium mining problems, this paper discussed the innovative application of high-pressure liquid injection technology in the field of in-situ leaching mining and its effectiveness. Comparative tests were conducted to verify the effectiveness of high-pressure liquid injection technology, pumping liquid volume test and tracer test were carried out under atmospheric pressure and high-pressure conditions respectively. The test results show that compared with the atmospheric pressure condition, the high-pressure liquid injection technology increases the injection flow by 6.4 times, the pumping flow by 1.05 times and the seepage velocity by 33 times. High-pressure liquid injection technology can effectively solve the leachants injection problem in low-permeability sandstone uranium mine, and the technology is convenient to implement in the mine site.

The domestic and international situation of digital mine was introduced. Aiming at the problem of information island, taking an in-situ leaching uranium mine in Inner Mongolia as the research object, following the digital uranium mine architecture of CNUC, the digital integrated management and control platform was designed. By analyzing the technical architecture of systems of the mine, the data interface program was researched and developed independently, which is compatible with WebService, OPC and IEC104 standards. Using the data interface program, the values in the database of OA, DCS and electric power system were got and centralized managed. By the digital integrated management and control platform, the digitalization level of in-situ leaching uranium mine was greatly improved.

A regional mining transportation system optimization model based on complex network planning was constructed to address the characteristics of dispersed mining of uranium deposits, diverse development methods, and complex transportation system networks in the region. Under the conditions of regional mining, a comprehensive planning and development transportation system was developed to enhance the efficiency, economy, and scientific effectiveness of the regional mining transportation system. By analyzing the spatial and geographical relationships of regional mines and the concept of intensive development, a system network diagram was established. Using network flow theory and Grey Wolf Algorithm, the global optimal solution for the regional mining transportation system was obtained. The effectiveness of the model was validated in the Xiangshan uranium mining area, and the optimal regional transportation route and lowest cost plan for the mine were calculated. The results indicate that the model meets the requirements of large-scale and intensive regional mining transportation systems, and has effective planning effects on transportation systems. It provides technical support for the economic and efficient operation of the transportation system in the Xiangshan uranium mining field, and can also provide reference for the intelligent transportation system planning of other uranium mining bases.

During the production of nuclear fuel elements, hydrofluoric acid solutions with high concentration of uranium are generated. According to the requirements of the National Nuclear Safety Administration (Guoheanfa 〔2023〕 No. 158), hydrofluoric acid solutions with uranium concentrations below 0.2 mg/L can be released from regulatory control. To meet national regulatory requirements, this study utilized a hydrofluoric acid-resistant resin functionalized with specific groups to investigate its uranium adsorption performance in uranium-containing hydrofluoric acid under static and dynamic conditions. The resin’s resistance to hydrofluoric acid corrosion, saturated adsorption capacity, desorption efficiency, and reusability were systematically evaluated. The results show that the uranium concentration in hydrofluoric acid treated with this resin is reduced to below 0.2 mg/L, meeting the regulatory release criteria. Furthermore, the resin exhibits no significant decline in uranium adsorption capacity after 10 adsorption-desorption cycles. These findings provide a foundation for subsequent large-scale engineering applications.

With the growing global demand for nuclear energy, the evaluation of the quality of uranium resource distribution and the precise measurement of reserves have become increasingly important. The uranium fission prompt neutron logging technology, as a critical tool for uranium ore logging exploration, offers the advantage of providing quantitative results unaffected by radioactive equilibrium. However, the measurement accuracy is influenced by the pulse width and yield of the neutron source. This study utilizes a uranium logging instrument equipped with an associated particle sealed-tube neutron generator, which enables time and spatial statistics of the companion α particles emitted by the outgoing neutrons. This approach helps to eliminate interference from the source neutrons and enhances the accuracy of the logging results. In the simulation process, to obtain information on neutron emissions during logging and the timing signal responses of both the companion α detector and the epithermal neutron detector, we propose a response time simulation method that combines Monte Carlo simulation software with MATLAB. By appropriately setting the pre-delay time and gate width, a relationship curve between the count rate and uranium content in formations with uranium levels ranging from 0 to 1.00% was established. The results from validation samples indicate that the calculated uranium content show a deviation of less than 0.1% from the actual values. When the uranium content in the formation exceeds 0.5%, the relative deviation is within 10%. This method meets the exploration requirements and demonstrates significant application value for uranium ore logging.