Analisis kestabilan lereng pit danau biru menggunakan metode kesetimbangan batas di pt allied indo coal jaya

DETAIL KOLEKSI

Analisis kestabilan lereng pit danau biru menggunakan metode kesetimbangan batas di pt allied indo coal jaya

Oleh : Lutfiana Dara Nurfityah

Info Katalog

Penerbit : FTKE - Usakti

Kota Terbit : Jakarta

Tahun Terbit : 2026

Pembimbing 1 : Pantjanita Novi Hartami

Pembimbing 2 : Yuga Maulana

Subyek : Slopes (Soil mechanics)--Stability

Kata Kunci : Slope Stability, Limit Equilibrium Method, Bishop, Morgenstern-Price, Planar Sliding, Overall slope

Status Posting : Published

Status : Lengkap

File Repositori

No.	Nama File	Hal.
1.	2026_SK_STT_073002200048_Halaman-Judul.pdf	14
2.	2026_SK_STT_073002200048_Surat-Pernyataan-Revisi-Terakhir.pdf	1
3.	2026_SK_STT_073002200048_Surat-Hasil-Similaritas.pdf	1
4.	2026_SK_STT_073002200048_Halaman-Pernyataan-Persetujuan-Publikasi-Tugas-Akhir-untuk-Kepentingan-Akademis.pdf	1
5.	2026_SK_STT_073002200048_Lembar-Pengesahan.pdf	2
6.	2026_SK_STT_073002200048_Pernyataan-Orisinalitas.pdf	1
7.	2026_SK_STT_073002200048_Formulir-Persetujuan-Publikasi-Karya-Ilmiah.pdf	1
8.	2026_SK_STT_073002200048_Bab-1.pdf	5
9.	2026_SK_STT_073002200048_Bab-2.pdf	35
10.	2026_SK_STT_073002200048_Bab-3.pdf
11.	2026_SK_STT_073002200048_Bab-4.pdf	15
12.	2026_SK_STT_073002200048_Bab-5.pdf	2
13.	2026_SK_STT_073002200048_Daftar-Pustaka.pdf	4
14.	2026_SK_STT_073002200048_Lampiran.pdf	63

Abstrak
Abstract

A Analisis kestabilan lereng merupakan aspek penting dalam kegiatan penambangan terbuka karena berpengaruh terhadap keselamatan kerja dan keberlangsungan operasi penambangan. penelitian ini bertujuan menganalisis kestabilan lereng highwall di pit danau biru pt allied indo coal jaya, membandingkan hasil analisis menggunakan metode bishop dan morgenstern-price, serta menentukan rekomendasi geometri overall slope yang sesuai dengan kondisi lereng. analisis dilakukan menggunakan limit equilibrium method (lem) dengan bantuan perangkat lunak slide2 pada kondisi kering dan jenuh, sedangkan analisis kinematik dilakukan menggunakan dips untuk mengidentifikasi mekanisme kelongsoran. hasil analisis kinematik menunjukkan adanya potensi kelongsoran bidang (planar sliding) yang bersifat non-circular. analisis kestabilan lereng aktual dengan tinggi 22 m dan sudut kemiringan 49Â° menghasilkan nilai faktor keamanan (fk) sebesar 1,472 pada kondisi kering dan 1,272 pada kondisi jenuh menggunakan metode bishop, serta 2,295 pada kondisi kering dan 2,088 pada kondisi jenuh menggunakan metode morgenstern-price. berdasarkan analisis lereng tunggal pada setiap litologi, geometri tinggi bench 6 m dan sudut 70Â° dipilih sebagai dasar penyusunan overall slope. geometri overall slope yang direkomendasikan terdiri atas empat bench, yaitu bench paling bawah dengan tinggi 6 m dan sudut 45Â°, dua bench berikutnya dengan tinggi 6 m dan sudut 70Â°, serta bench paling atas dengan tinggi 4 m dan sudut 70Â°. hasil analisis overall slope menggunakan metode morgenstern-price menghasilkan nilai fk sebesar 1,806 pada kondisi kering dan 1,479 pada kondisi jenuh. kedua nilai tersebut memenuhi kriteria faktor keamanan minimum berdasarkan keputusan menteri esdm nomor 1827 k/30/mem/2018, sehingga geometri overall slope yang direkomendasikan dinyatakan stabil dan aman untuk diterapkan. metode morgenstern-price dipilih sebagai acuan utama karena lebih sesuai dengan mekanisme kelongsoran non-circular yang teridentifikasi pada lokasi penelitian.

S Slope stability analysis is an important aspect of open-pit mining activities because it affects work safety and the continuity of mining operations. this study aims to analyze the stability of the highwall slope at the danau biru pit, pt allied indo coal jaya, compare the analysis results using the bishop and morgenstern-price methods, and determine an overall slope geometry recommendation suitable for the slope conditions. the analysis was conducted using the limit equilibrium method (lem) with the assistance of slide2 software under dry and saturated conditions, while kinematic analysis was performed using dips to identify the potential failure mechanism. the kinematic analysis indicated the potential occurrence of planar sliding, which is classified as a non-circular failure mechanism. stability analysis of the existing slope, with a height of 22 m and an inclination angle of 49Â°, resulted in factor of safety (fs) values of 1.472 under dry conditions and 1.272 under saturated conditions using the bishop method, and 2.295 under dry conditions and 2.088 under saturated conditions using the morgenstern-price method. based on the single-slope analysis of each lithology, a bench height of 6 m and an angle of 70Â° were selected as the basis for developing the overall slope. the recommended overall slope consists of four benches, with the lowest bench having a height of 6 m and an angle of 45Â°, two subsequent benches having a height of 6 m and an angle of 70Â°, and the uppermost bench having a height of 4 m and an angle of 70Â°. the overall slope analysis using the morgenstern-price method resulted in fs values of 1.806 under dry conditions and 1.479 under saturated conditions. both values meet the minimum factor of safety criteria stipulated in the decree of the minister of energy and mineral resources number 1827 k/30/mem/2018; therefore, the recommended overall slope geometry is considered stable and safe for implementation. the morgenstern-price method was selected as the primary reference because it is more suitable for representing the non-circular failure mechanism identified at the study site.