Abstract: Open-stope mining with subsequent filling methods is characterized by its safety,high efficiency,and simple
technology. It can also effectively deal with the mining-out and control the movement and deformation of the rock,so it has become
one of the mainstream mining methods for the metal underground mines in China. Based on the application status of the
open-stope mining with a subsequent filling method,the paper introduces the mining characteristics of this method,describes
the research status and innovation achievements of the open-stope mining with subsequent filling methods in aspects of panel
and room layout,room structural parameters,stope bottom structure,filling demand and its mechanism of inhibiting the deformation
of surrounding rock. It also summarizes the existing shortcomings in the research and application of this mining method
during the 14th Five-Year Plan period in China,such as mining method and technology,filling material and filling technology,
and deformation and control of surrounding rock. It also looks forward to the future development direction. The research and application
for the “15th Five-Year Plan” or even a longer period of time should focus on:① Under the premise of ensuring the
safety of mining,the research on continuous mining with large structural parameters and the ore transportation technology combined
with scraper draw out + mining card transfer + centralized ore pass drawing in the mining area are promoted to improve
the stope production capacity of open-stope mining with subsequent filling method and accelerate the efficient and intelligent
development of the mining method;② For improving the comprehensive utilization rate of industrial solid waste and the mining
efficiency and reducing the filling cost,the backfill material with high early strength,rapid strength growth and strong resistance to blasting impact should be developed to shorten the interval time of the first and second step stope mining and improve the
mining intensity of the levels;③ To effectively control surface settlement,it is necessary to establish a filling quality evaluation
system and standards,study the matching characteristics of filling material strength,filling technology,etc. with the requirements
for controlling the deformation of surrounding rock in the stope and disk area and surface settlement,and reduce production
costs;④ To achieve effective control of surface deformation and settlement,it is essential to investigate control technologies
related to the shrinkage and settlement behavior of full-tailings cemented backfill,as well as backfill-to-roof interface bonding
in mined-out areas. These efforts will enhance the contribution of mining methods to the green and sustainable exploitation of
mineral resources;⑤ To mitigate the impact of uncertain factors,it is necessary to develop intelligent design technologies for
open-stope mining with subsequent filling method and intelligent control technologies for the mining process;⑥ To achieve the
aim of the digitalization and intelligence in mines,the level of intelligent decision-making and equipment automation in the implementation
of open-stope mining with subsequent filling method should be enhanced,with the ultimate goal of realizing an unmanned
mining mode of "one-key control".