Mining activities in Indonesia are vulnerable to the threat of terrorism from armed separatist groups. One such case was an attack on PT Freeport Indonesia's Grasberg gold mining facility in Papua by the KKB group. This incident shows that mining terrorism can threaten the operations and investment of this vital sector. This study aims to analyze the impact of terrorism threats on mining activities, evaluate security strategies implemented in dealing with terrorism threats, and provide recommendations to improve security in mining activities in areas that are vulnerable to terrorism threats and assess the threat of terrorism at the Grasberg mine impact on gold mining operations and investment in Indonesia. Case studies are conducted with a qualitative approach. Data is collected through literature review. Data analysis using content analysis techniques. The study found that security incidents by the KKB in Grasberg negatively impacted gold mining operations and investment in Indonesia. Recommendations for handling the threat of terrorism through strengthening the mine security system and stakeholder cooperation. Mining activities, particularly the Grasberg Gold Mine, are vulnerable to the threat of terrorism due to the complexity of the conflict in the area. The security strategy implemented tends to be not optimal in dealing with the threat of terrorism. Therefore, improvements in the security system and better cooperation between relevant parties are needed to reduce the vulnerability of the mining sector to the threat of terrorism.