PT. Nusa Cendana is a mining company operating andesite mining in Taman Ayu Gerung Village, Gerung District, West Lombok Regency, West Nusa Tenggara Province. Andesite criteria are classified as hard and difficult to separate. PT. Nusa Cendana carries out mining activities with a quarry mining system. PT. Nusa Cendana has a problem on the slopes because the current slope is 85°, and many joints on the slopes cause landslides. Ideally, the slope is 70°. Slope stability is used to determine the slope’s safety factor and ideal geometry. So, before making slopes in mining, it is necessary to analyze first whether the type of rock supports the geometry of the slope. One method is to assess the rock’s strength, namely the rock’s compressive strength test. Based on the results of laboratory tests, the values for the bulk density were 15.97 kN/m3, internal shear angle (ϕ) 40.36°, and cohesion 42.01 kN/m2. The safety factor analysis using slide2D software obtained 1.233 m for the value of the safety factor for slope stability.