Experimental Study of Triaxial Test of Gravel Soil in Yili's First Coal Mine

Abstract

The strength of gravel soil of Yili’s First Mine in different water contents was studied by multifunction static and dynamic triaxial test machine. The results show that （1）The yield limit decreases with the increasing of water content under steady confining pressure, and the greater the confining pressure, the greater the yield point of its axial in the same moisture conditions. （2）The expansion becomes into contraction with increasing moisture content. （3）Strength index of gravel soil becomes smaller with the increase of moisture content. The relationship between friction angle and water contents is . And the relationship between cohesion (or bite force) and water contents is . The results provide a theoretical basis for shaft design and construction of Yili’s First Mine.

Study on the Influence of Seepage Conditions with Different Rainfall Intensities on the Structural Evolution of Soil-Rock Mixture Filler

“…A part of scholars proposed that the stone content [8][9][10] and water content [11][12][13][14] have important effects on the mechanical properties of the SRM filler under rainfall conditions. Li et al [15,16] studied the influence of moisture content and dry density on the permeability coefficient of wide graded gravel soil by triaxial permeability test. Liu et al [17] obtained the "jumping" phenomenon of shear stress, volumetric strain characteristics, and shear strength variation of SRM filler under different moisture content by large direct shear test.…”