Pengaruh Aktifitas Alat Berat dan Peledakan Terhadap Stabilitas Lereng Timbunan Tambang Batubara

Fanteri Aji Dharma Suparno (Department of Mining Engineering, University of Jember)
Siti Aminah (Department of Mining Engineering, University of Jember)
Haeruddin Haeruddin (Department of Mining Engineering, University of Jember)
Utari Retno Sulistyo Rini (Department of Mining Engineering, University of Jember)
Kurnia Dewi Mulyani (Department of Mining Engineering, University of Jember)
Emanuel Grace Manek (Department of Mining Engineering, University of Jember)
Muhammad Akbar Assyarbini (Department of Mining Engineering, University of Jember)

MEDIA KOMUNIKASI TEKNIK SIPIL
Volume 31, Nomor 2 (2025)

Open-pit mining generates voids backfilled with overburden, forming artificial slopes susceptible to landslides. Improper slope design and external factors such as heavy equipment loads, blasting vibrations, and groundwater may trigger instability. This study examines the stability of a disposal slope adjacent to the blasting zone at PT X Coal Mine in East Kalimantan, Indonesia. The research uses secondary data from PT X. including geotechnical parameters and operational details, Slope stability was evaluated via the Limit Equilibrium Method (Bishop and Morgenstern-Price) and Finite Element Method (FEM). Initial analyses revealed critical safety factors (FoS) of 0.853 (Bishop, Morgenstern-Price) and 0.520 (FEM), indicating high instability under combined dynamic and hydrogeological stresses. A slope redesign was proposed, improving FoS to 3.932 (dry) and 3.523 (wet) via Limit Equilibrium, and 1.570 (dry) and 1.370 (wet) via FEM. These value;s comply with the safety threshold (FoS ≥ 1.1) specified in KEPMEN ESDM No. 1827 K/30/MEM/2018, ensuring operational safety. The study underscores the necessity of integrating geotechnical and operational constraints in slope design to mitigate landslide risks in open-pit mining.