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加拿大和澳大利亚金属矿山广泛采用胶结充填。在大多数情况下,采用细粒水砂充填,即用浮选尾矿作骨料,加入硅酸盐水泥作胶凝剂。通过加入冶炼炉渣的方法,可以减少水泥用量。影响充填料强度的因素有:骨料粒级配比、水泥、水以及添加剂(如絮凝剂)的含量等。此外,充填料强度还与养护期龄和环境条件、特别是温度有关。测定充填料强度的方法,有单轴抗压强度试验、三轴抗压强度试验和现场测试。除了充填料强度、聚合力和内摩擦力以外,充填料的渗滤性对其脱水性能也有重要意义。除了细粒尾砂充填外,还采用粗粒碎石作骨料,加入水泥浆或水泥砂浆进行充填。碎石胶结充填料的强度与结构类型有关,影响其强度的因素同影响细粒尾砂胶结充填料强度的因素相似。
Cement mills are widely used in Canadian and Australian metal mines. In most cases, the use of fine-grained water sand filling, that is, flotation tailings aggregate, adding Portland cement as a gelling agent. By adding smelting slag method, you can reduce the amount of cement. Affect the filling material strength of the factors are: aggregate size grading, cement, water and additives (such as flocculant) content. In addition, the strength of the filler is also related to the age of maintenance and the environmental conditions, especially the temperature. Methods for the determination of filler strength, uniaxial compressive strength test, triaxial compression strength test and field test. In addition to filling strength, polymerization and internal friction, the infiltration of filling material on its dehydration performance is also of great significance. In addition to fine-grained tailings filling, coarse gravel is also used as aggregate, adding cement slurry or cement mortar for filling. The strength of gravel cements is related to the type of structure, and the factors affecting the strength are similar to the factors affecting the strength of cemented cements.