The application status of backfill mining technology in China: Changsha backfill industrial pump industrial backfill pump. China's backfill mining technology has gone through the development process of waste rock dry filling, graded tailings hydraulic filling, crushed stone hydraulic filling, concrete bonding filling, frosted bonding filling, graded tailings or natural sand filling, waste rock bonding filling, full tailings bonding filling, red mud bonding filling, and paste filling. However, China has a large number of mines and various types of filling processes and technologies for development and application. Especially in the past decade, significant progress has been made in the research, development, and promotion of new filling technologies. Overall, the development of backfill mining technology in China can be roughly divided into the following stages. The first stage was in the 1950s and 1960s, both of which were waste rock dry filling processes aimed at treating waste. However, due to its low efficiency, low production capacity, and high labor intensity, the dry filling of waste rock cannot meet the development of the mining industry. The proportion of dry filling mining in China has been decreasing year by year and is almost in a eliminated position.我国充填采矿技术应用现状   长沙充填工业泵工业充填泵我国的充填采矿技术经历了废石干式充填、分级尾砂水力充填、碎石水力充填、混凝土胶结充填、磨砂胶结充填、分级尾砂或天然砂充填、废石胶结充填、全尾砂胶结充填、赤泥胶结充填和膏体充填的发展过程。但中国矿山数量多，开发与应用的充填工艺与技术类型多，尤其是近十余年来，在新的充填技术的研究开发和推广应用方面均取得了长足的进步。综合起来，中国的充填采矿技术发展大体分以下几个阶段。   第一阶段是20世纪50年代、60年代，均是以处理废弃物为目的的废石干式充填工艺。但废石干式充填因其效率低、生产能力小和劳动强度大，满足不了采矿工业的发展，国内干式充填采矿所占比重逐年下降，几乎处于被淘汰的地位。