岩溶区铝土矿尾矿泥浆自重固结模型试验研究

根据广西平果铝岩溶堆积型铝土矿尾矿泥浆堆场排放及填筑特点,设计一尺寸为1 000 mm(长)×1 000 mm(宽)×600 mm(高)试验箱模拟尾矿泥浆的排放固结过程,并分别进行了第一、二、三层(层高200mm)泥浆的排放试验,以研究广西平果铝尾矿泥浆距离中央排水管不同位置的表层、各不同深度沉降及排水量与时间的关系,以及各层之间沉降和排水相互影响。试验结果表明,各层泥浆的表层及分层沉降趋势基本一致,沉降量较均匀,三层泥浆稳定后总沉降量为110 mm,占总高度的18.3%;而单独堆填第一层泥浆时排水量最大,占泥浆总量的6.02%,随着后期第二层、第三层泥浆的堆填排水量逐级递减,分别占泥浆总量的5.87%,4.22%。相邻泥浆层间沉降及排水量影响较大,隔层影响较小。

An experimental study on self-weight consolidation of the red mud tailings placed in karst regions

According to the features of dispersal and filling of mud tailings at Pingguo aluminum mine in Guangxi,a 1 000 mm long,1 000 mm wide and 600 mm high test chamber was designed to simulate the dispersal and consolidation process of mud tailings.And dispersal tests of the first,second and third layer mud tailings(200 mm in height for each layer) were carried out respectively to study the relationship between surface and stratified settlement,drainage discharge and time at different locations from the central drain and the transaction between the settlement and drainage.The results show that the settlement tendency is the same for both surface and other layers,and the settlement is uniform.The final settlement was 110 mm or 13.8% of the total height after the three layers of red mud became stable.The drainage discharge is the largest when filling the first layer mud(6.02% of the total discharge),and it is reduced when filling the second and the third layer mud(5.87% and 4.22% of the total discharge,respectively).The influence of adjacent layer on the settlement and drainage discharge is larger than that of interlayer.