This study investigates concrete chute transportation technology for 1000 m ultra-long inclined shafts through design calculations, laboratory tests, and field trials. By optimizing concrete mix proportions, the research resolves segregation issues in ultra-long chute concrete. Field investigations identified alumina ceramic and ultra-high molecular wear-resistant materials as suitable inner lining options. Through grinding wheel wear tests and finite element simulations, both materials demonstrated adequate wear resistance for concrete discharge operations. To meet the requirements for lightweight construction, durability, and rapid replacement, the chute diameter, ceramic sheet thickness, and multi-length sections were optimized. Customized configurations included eight-section fiberglass pipes with alumina ceramic linings and four-section ultra-high molecular wear-resistant chutes. Field tests confirmed both materials satisfied operational needs. Economic analysis concluded that ultra-high molecular wear-resistant materials are recommended as the preferred inner lining for ultra-long concrete chutes.
Zeng et al. (Wed,) studied this question.