With the continuous exploitation of wolframite resources, the raw ore gradually tends to be poor and fine. Flotation has become an effective means to improve the recovery efficiency of fine wolframite. In recent years, study of flotation technology has mainly focused on the development of flotation reagents. Taking the development of wolframite flotation reagents as the starting point, the development of collectors, activators and inhibitors in wolframite flotation was introduced. The combination methods, advantages and disadvantages and indexes of reagents were described in detail. The flotation process mechanism of flotation reagents and the mechanism of solid-drug surface action were analyzed. The results show that the chelating collector has strong selectivity, but the cost of the reagent is high, the manufacturing process is complex and the stability is poor, and there are few reagents that can be applied in actual production. Fatty acid collectors are widely used because of their strong collecting ability and low price, but their selectivity will be reduced, and they are often used in combination with other agents. The collecting performance of arsonic acid and phosphonic acid collectors is better than that of fatty acid collectors, but because of its high price and environmental pollution, it has not been applied in actual industrial production. The combined use of collectors can not only reduce the production cost of mines, but also reduce the use of toxic agents to a certain extent. Highly selective activators and inhibitors can achieve efficient separation of wolframite slime and gangue minerals. According to the existing situation, new reagents with high selectivity, low dosage, environmental protection and non-toxicity should be developed according to different ore properties.

Aiming at the problem of stable driving of mining rehicle in the complex terrain of submarine cobalt-rich crusts, a scheme of four-track all-wheel drive travel mechanism for deep-sea mining vehicles and a terrain-adaptive control method were proposed, and a mechanical model of four-track travel was established. A multi-body dynamics simulation model was built based on Recurdyn software. The characteristics of the four-track travel mechanism, such as straight-line travel, climbing, obstacle-crossing and steering, were analyzed, and laboratory tests and marine tests for the travel mechanism were carried out for verification. The results show that the test results are close to the theoretical calculation values, with the calculation error within 10%. The adaptive control method effectively improves the travel effect of the travel mechanism and reduces the deviation of straight-line travel. When the travel speed is 0.051 m/s, the adoption of vehicle body leveling control can improve the travel stability by 2 to 3 times. However, when the travel speed is 0.198 m/s, the control effect is relatively poor. On the whole, as the travel speed increases, the effect of the adaptive control weakens continuously. The research results can provide references for the research and development of travel technologies and equipment in deep-sea complex terrains.

Dynamic disasters such as rockburst caused by mining disturbance seriously restrict the development and utilization of deep mineral resources. It is of great significance to explore the propagation process of internal cracks in rocks to reveal the rock failure mechanism and disaster warning. Based on this, the spatial-temporal response characteristics of acoustic emission of granite under uniaxial loading were monitored. The single linkage clustering (SLC) method was used to construct the SLC structure of acoustic emission events. By introducing the spatial correlation length of acoustic emission events, the spatial correlation degree between acoustic emission events at different time scales was analyzed. The results show that the three-dimensional localization and energy properties of acoustic emission events can characterize the propagation and damage evolution process of microcracks in granite specimens. As the stress increases, the link length in the SLC structure gradually decreases, and the correlation within the crack cluster increases. The spatial correlation length has experienced three stages of high-level fluctuations, stable fluctuations and sudden increase. When it is close to the fracture of granite, the spatial correlation length increases sharply due to the redistribution and transmission of stress in the sample, which can be used as the early warning point of granite instability. The SLC method provides an effective method for studying the evolution process of rock crack propagation, which can provide a reference for the early warning and prevention of dynamic disasters such as rock burst.