Experimental study on the evolution law of mining‐induced fractures and deformation rock mass structure of gently inclined layered slope

Landslide induced by underground mining is the main type of geological disaster in Guizhou Province. The spatial position mined-out area key factor affecting deformation evolution landslides. Three typical mining-induced slopes western Province are selected to establish engineering model. orthogonal experimental design carried out with relative slope shoulder (PM) and height (SH) as variables, discrete element simulation test out. influence two variables on overlying strata fractures structure surface deformed rock mass analyzed gray relational method. results show that under effect mining, gradually collapses produces cracks through surface. force chain arch develops from lower part layer, layer transformed a cantilever beam embedded at one end multisegment articulated beam. Depending number segments structure, it can be divided into three categories, where collapse occurs mainly concentrated central subsidence basin, length beam, fulcrum, rotation angle indicators stability Gray analysis shows PM primary control output these indicators. multiple linear regression model degree between SH was constructed, prediction formula grade obtained, which realized multiobjective same parameters. provide theoretical basis for prevention mitigation gently inclined layered slopes.