Study on influencing factors of slope stability and evolution law of safety factor in coal measure strata

Aiming at the influence factors and their action regulation of slope stability in coal measure strata Beijing–Hong Kong & Macao Expressway, characteristics injection dip angle rock stratum, thickness strength parameters soft interlayer, height size on safety factor are systematically studied by using limit equilibrium method theory. The height, weak interlayer shear with different angles is that decreases first then increases increase angle. minimum under each near 30°, which indicates poor when stratum about 30°. With angle, decreases. However, less than 40°, a stable state do not affect slope. Slopes have affected height. difference between analytical solution numerical analyzed. research provides theoretical basis for treatment slopes has certain practical significance.