关键词: 不同含水率;胶结充填体;单轴抗压强度;损伤;本构模型

Abstract: A full tailing cemented filling body made of metal mine tailing and cement is taken as the research object, the strength test of the specimens with different moisture contents filling body in the process of deformation and failure was carried out by uniaxial compression and using RMT-150C hydraulic servo control system and sensor acquisition system.The test results show that: the samples with completely dry state have the highest strength, and the different moisture contents have obvious influence on the strength of the filling body.The higher the water content, the lower the uniaxial compressive strength.In the elastic phase, water has a great influence on the elastic modulus of the filler sample, the brittleness in the dry state is larger, the slope of the curve is larger, and water softens obviously. Intergranular cohesion and friction are reduced by the action of water.The quantitative relationship between uniaxial compressive strength and moisture content shows a polynomial decrease.Different water content filling bodies have different damage characteristics, the damage development of the dry filling body is inhibited by water, but the damage development of the aqueous filling body is promoted by the increase of the water content.

Key words: different moisture content;cemented filling body;uniaxial compressive strength;damage;constitutive model