Abstract:
To address the frequent blockages of sticky and wet materials, prominent risks of bunker surges (surging accidents), severe safety hazards of manual clearing, and poor production continuity in coal preparation plants, the mechanism of sticky-wet material blockage and its correlation with bunker surge risks were systematically analyzed. Key influencing factors, including moisture content, material particle size, and equipment structure, were emphatically discussed. In terms of safe disposal technologies, a multidimensional solution encompassing mechanical modification, pneumatic arch-breaking and clearing, intelligent monitoring and early warning, specialized prevention of bunker surges, and management optimization was comprehensively elaborated, with the practicality and effectiveness of each technology validated through typical case studies. The results indicate that material moisture content and fine particle content are the core intrinsic causes of blockage, while structural defects of the bunker and improper operation serve as the primary extrinsic factors; furthermore, the instability caused by blockages easily induces bunker surges. By implementing mass-flow bunker design, high-performance anti-sticking liners, multi-sensor fusion monitoring, programmed pneumatic arch-breaking, and safety interlocking modifications, arching and wall-sticking can be suppressed at the source, enabling early warning of blockages and safe clearing operations. Engineering validation demonstrates that unexpected downtimes, manual clearing costs, and safety hazards are significantly reduced, while capacity utilization is substantially enhanced. Constructing a comprehensive prevention and control system oriented around “prevention as the priority, monitoring and early warning as the core, and emergency disposal as the guarantee” can effectively mitigate the risks of blockage and bunker surges, providing robust technical support for the intrinsic safety and efficient operation of coal preparation plants.