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为了搞清脱水全尾砂用于矿山充填和采用泵送的一些特点,美国矿业局在三个金属矿山进行了一系列试验,这些试验都完成得很好,因为试验输送料浆的重量浓度均高于75%,其中固体颗粒不再产生沉淀。可以称作是均质浆体或膏体.所测试的工程特性包括密度、塌落度、养护28天后的沉降率,养护期分别为28,120和180天时的抗拉强度,养护期分别为7.28,120和180天时的单轴抗压强度。采用线性和非线性的统计方法对由这三个矿山的尾砂配制成的充填料的测试结果进行了分析。所得图表结果,提供了充填料配比的预测手段,以选择胶结材料及其配比,满足所需工程特性的要求。在进行泵送性能测试时,用两个矿山的尾砂制成胶结膏体充填料和非胶结膏体充填料,进行了六次较大规模的泵送试验,在同一膏体稠度条件下,系用三种不同管径的环形管道闭路系统、对不同流速情况下的摩擦阻力损失进行了试验比较.
In order to understand the characteristics of dehydrated tailings for mine filling and pumping, the US Bureau of Mines conducted a series of tests at three metal mines that performed well because both the weight concentrations of the test feed slurry Above 75%, solid particles no longer precipitate. Can be referred to as a homogeneous slurry or paste.The engineering properties tested included density, slump, settlement after 28 days of maintenance, tensile strengths at curing days of 28, 120 and 180 days, respectively, with curing periods of 7.28, Uniaxial compressive strength at 120 and 180 days. The linear and nonlinear statistical methods were used to analyze the test results of the filler material prepared from the tailings of the three mines. The resulting chart results provide a means of predicting the charge to fill ratio to select the cementitious material and its proportions to meet the required engineering characteristics. During the pumping performance test, the two mine tailings were used to make the cement paste and the non-cement paste, and six large-scale pumping tests were conducted. Under the same paste consistency, In this paper, three kinds of annular pipe closed-loop systems with different diameters are used to compare the frictional resistance losses under different flow rates.