黄金科学技术 ›› 2022, Vol. 30 ›› Issue (1): 54-63.doi: 10.11872/j.issn.1005-2518.2022.01.092
王仲辉1(),王千福1,田亚坤1,2,伍玲玲1,2,禹雪阳1,张志军1,2()
Zhonghui WANG1(),Qianfu WANG1,Yakun TIAN1,2,Lingling WU1,2,Xueyang YU1,Zhijun ZHANG1,2()
摘要:
为辅助计算尾矿存积的沉降距离,指导放矿、尾矿子坝堆筑,提高尾矿坝的经济效益。研究干湿循环作用和含水率对湖南某金属尾矿库尾砂的压缩固结特性的影响。对含水率为10%、12%、14%、16%和18%的尾砂分别进行0~5次脱湿—吸湿—再脱湿试验,借助GZQ-1型全自动高压固结仪对试样开展了快速固结试验。研究结果表明:(1)相同条件下,孔隙比随着压力的上升而减少;(2)相同循环次数下,压缩系数随着含水率的上升而增加;相同含水率下,压缩系数随着干湿循环次数的增加呈“Λ”型变化;(3)不经干湿循环,固结系数随含水率的增加先上升后下降;在相同含水率条件下,随干湿循环次数的增加,固结系数的变化大致呈M型波动。前期循环过程受力以毛细水压力为主导,待颗粒运动稳定,尾砂孔隙结构发育完全,受力以黏结力和摩擦力为主导。
中图分类号:
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