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苏沃洛夫耐火粘土矿年年要建造大约100个吸水孔,目的是用来予先疏干由细砂组成的涌水量很大的含水层。砂的粒度组成:1.0～0.5毫米粒级占2.52％;0.5～0.25毫米粒级占23.16％;0.25～0.1毫米粒级占68.49％;0.1～0.05毫米粒级占2.57％。砂中约有3.3％的粉土和粘土颗
Suvorov refractory clay mines year to about 100 water holes, the purpose is to be used to pre-drainage composed of fine sand gushing water aquifer. The particle size of the sand is composed of 1.0 to 0.5 mm fractions accounting for 2.52%, 0.5 to 0.25 mm fractions accounting for 23.16%, 0.25 to 0.1 mm fractions accounting for 68.49% and 0.1 to 0.05 mm fractions accounting for 2.57%. There are about 3.3% silt and clay in the sand