C oal mining is an activity that utilizes non-metallic natural resources whichhas economical value as a source of power generation, transportation fuels anduses for other industrial production. In open pit planning, slope stability is animportant factor for mining operations, which is the objective of the research. Themethod used in finding safety factor values is the Janbu method with certain inputparameters. Avalanches on mine slopes can be classified consisting of planarlandslides, wedge landslides, toppling landslides and circular landslides. Thisresearch method uses the stages of field data collection in the form of geologicalconditions and geotechnical drilling data obtained from laboratory results by thecompany PT. MAS Based on the analysis of joint data, the interpretation resultsshow that there is a fault plane in the form of Left Slip Fault with a value of N37 °/ 82 °. Furthermore, data processing is done by inputting parameters, such ascohesion, friction and unit weight of soil or rock, into the Rocscience Slide 6.0software based on the Janbu method. From the processed data, the results showthat the study area has a slope with a safety factor value of 0.984 before thelandslide and changes in the value of the safety factor to 1.178 after experiencinga landslide. Through kinematic analysis, the probability of direct toppling landslidetype is 12.70% and oblique direct toppling with a percentage of 30.69%. Whereasin analysis with a geological approach, landslides show features with rotationalslides or slips