Experimental Study on Compaction Characteristics and Mechanical Behavior of Crushed Rock Masses

The compaction and consolidation process of a regenerated roof can be divided into two stages, namely, secondary fragmentation crushed rock masses pore structure adjustment. Therefore, the mechanical properties differs significantly from those primary roof. We performed confined compression tests mudstones sandy using self-developed testing apparatus. studied influence moisture content, ratio, particle size, volume-based degradation on characteristics based microscopic morphology masses. Further, degrees these factors stability consolidated bodies were determined. mechanism each factor compressive shear strengths was revealed. results indicated that involved constant adjustment contact stress states Under uniaxial shearing, presented features ductile failure. ratio size most important influencing in bodies. we carried out an orthogonal experiment built multivariate nonlinear regression model to quantitatively characterize combined behavior