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三山岛金矿新立矿区西南部矿体属海底开采,海底充填倍线达13,水平输送距离超过2000 m,属于高倍线强阻力输送充填料浆。为了解决充填料浆输送距离长、倍线高、输送阻力大等技术难题,进行了分级尾砂物化性能测试,充填骨料配比试验,管道输送阻力模拟等研究。研究结果表明,分级尾砂颗粒较粗,脱水性好,但是在输送过程中易沉降;添加细颗粒,能改善分级尾砂的流动性;推荐料浆配比为1:6~1:8,料浆输送质量分数为72%。通过充填料浆环管阻力输送试验和理论计算,得出料浆最大输送阻力为9MPa,除去自重水力压头,需加泵压6 MPa。工业应用结果表明,分级尾砂高倍线充填是可行的,为海底矿床安全开采提供了保障,实现了高倍线充填海底矿床。
The ore body in the southwestern part of Xinli Mines in Sanshandao Gold Mine belongs to seafloor mining. The seafloor filling doubled line reaches 13 and the horizontal conveying distance exceeds 2000m. It belongs to the high-line and strong resistance conveying filling slurry. In order to solve the technical problems of long conveying distance, high doubling line and high conveying resistance of filling slurry, physical and chemical properties of graded tailings, proportioning test of filled aggregate and resistance simulation of pipeline were studied. The results show that the graded tailings particles are coarse and the dehydration is good, but they are easy to settle during transportation. Adding fine particles can improve the fluidity of the graded tailings. The recommended ratio of slurry is 1: 6 ~ 1: 8, Slurry delivery mass fraction of 72%. Through the resistance test and theoretical calculation of the stuffing loop, the maximum conveying resistance of the slurry was found to be 9 MPa. The hydraulic head with self weight was removed and the pumping pressure was 6 MPa. Industrial application results show that the classification of tailings high-fold filling is feasible for the safe mining of submarine deposits to provide a guarantee for the realization of the high-fold line seafloor deposits.