The research looked at how mining multiple coal seams in Indonesia's weak rock areas can work well. They studied a coal mine in East Kalimantan to see how digging one coal layer affects another layer's entrances. By using computer models, they saw how the first coal layer's mining impacts the stability of the second layer's gate entrances. They found that factors like coal seam depth and interburden thickness affect how stable the gate entrances are. The study suggested ways to support the gate entrances properly to keep them stable during mining.