Integrasi Analisis Kinematika dan Q-slope untuk Optimasi Geometri Lereng pada Kuari Batugamping Daerah Moramo Utara, Sulawesi Tenggara

Masri; Haiurn Anwar; La Ode Andimbara; Waode Rizky Awaliah Nafiu; La Ode Sahiddin; Abd Ali Kayum Pino; La Ode Ngkoimani

doi:10.56099/ophi.v8i1.p86-98

Penulis

Masri Teknik Geologi Universitas Halu Oleo https://orcid.org/0000-0001-6551-5150
Haiurn Anwar Program Studi Teknik Geologi, Universitas Halu Oleo, Kendari, Indonesia
La Ode Andimbara Program Studi Teknik Geofisika, Universitas Halu Oleo, Kendari, Indonesia
Waode Rizky Awaliah Nafiu Program Studi Teknik Pertambangan, Universitas Halu Oleo, Kendari, Indonesia
La Ode Sahiddin Program Studi Teknik Geofisika, Universitas Halu Oleo, Kendari, Indonesia
Abd Ali Kayum Pino Program Studi Teknik Pertambangan, Universitas Sulawesi Tenggara, Kendari, Indonesia
La Ode Ngkoimani Program Studi Teknik Geologi, Universitas Halu Oleo, Kendari, Indonesia

DOI:

https://doi.org/10.56099/ophi.v8i1.p86-98

Kata Kunci:

longsoran baji, kinematika longsoran, probabilitas kelongsoran, Q-Slope, Kuari batugamping

Abstrak

Optimalisasi geometri lereng pada kuari batugamping krusial untuk menjamin keselamatan kerja dan keberlanjutan produksi di tengah karakteristik massa batuan yang kompleks. Penelitian ini bertujuan untuk menentukan desain geometri lereng kuari optimal di Desa Wawatu, Kecamatan Moramo Utara, Sulawesi Tenggara, melalui integrasi analisis kinematika dan metode Q-slope. Kebaruan penelitian ini terletak pada pengembangan hubungan empiris yang menjembatani sistem RMR, SMR, dan Q-slope khusus pada kuari batugamping daerah penelitian. Metode penelitian meliputi survei garis pindai (scanline), analisis kinematika menggunakan proyeksi stereografis, serta evaluasi kelas massa batuan. Hasil penelitian menunjukkan bahwa kestabilan lereng sangat dikontrol oleh kekar dan perlapisan, dengan potensi longsoran baji mendominasi Lereng 1, 3, dan 5 (probabilitas hingga 69,73%) serta longsoran guling pada Lereng 2 (41,46%). Meskipun kualitas massa batuan dasar tergolong "Baik" (RMR 63–70), parameter SMR (53–66) dan Q-slope (0,17–7,13) memberikan penilaian yang lebih konservatif terhadap pengaruh orientasi diskontinuitas yang tidak menguntungkan. Berdasarkan grafik kestabilan Q-slope dengan ambang batas probabilitas kelongsoran 1%, direkomendasikan penyesuaian sudut kemiringan lereng yang lebih landai pada area kritis untuk memitigasi risiko instabilitas. Temuan ini membuktikan bahwa pendekatan Q-slope yang bersifat site-specific mampu meningkatkan standar keselamatan kerja sekaligus mengoptimalkan efisiensi produksi pada operasional penambangan terbuka.

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