Tilling Technology with High Filling Times Line and Strong Resistance for the Undersea Mining
LI Xibing1, WANG Lihong1, LIU Dayong2
1. School of Resources and Safety Engineering, Central South University, Changsha 410083, China;
2. Changsha Digital Mine Infotech Company, Changsha 410083, China
Abstract:The southwest orebody in Xinli district of Sanshandao gold mine is deep-sea metal deposit mining. The undersea backfilling is characterized by high filling times line and strong resistance to transport, because the filling line reaches up to 13 and the horizontal pipe is over 2000 m. The physical-chemical properties of classified tailings, proportion of slurry with classical tailings as aggregate, the resistance of pipeline transportation are studied to solve the technological problems of filling including long filling pipe, high filling timesline, and high resistance. The results indicate that classified tailings, which are good for dehydration as coarse particles and easily settle, are fit for backfilling after adding fine particles. The suggested dosage is 1:6 -1:8 (cement to classified tailings) with mass fraction 72%. By the round-pipe test and theoretic calculation, the maximal transport resistance may reach 9 MPa, so a pumping pressure of 6 MPa is required besides the hydraulic pressure. The application in mine shows the feasibility of the technology, which can provide safety for deep sea mining in the future as well as realize high filling times line filling in deep sea mining .
李夕兵, 王丽红, 刘大勇. 基于海底开采的高倍线强阻力充填技术[J]. 科技导报, 2014, 32(3): 39-43.
LI Xibing, WANG Lihong, LIU Dayong. Tilling Technology with High Filling Times Line and Strong Resistance for the Undersea Mining. journal1, 2014, 32(3): 39-43.
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