Time Series Insar For Mining Disposal Deformation Monitoring

Wardhana, Gunawan Wisnu (2025) Time Series Insar For Mining Disposal Deformation Monitoring. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kegiatan pertambangan merupakan salah kegiatan usaha yang berisiko tinggi terhadap keselamatan kerja dan lingkungan. Salah satu bagian dari kegiatan pertambangan adalah penimbunan batuan penutup atau overburden pada area yang disebut disposal. Penimbunan di disposal akan membentuk lereng lereng yang berpotensi mengalami kelongsoran. Faktor-faktor yang mempengaruhi kestabilan lereng harus selalu dipertimbangkan dalam perencanaan, pelaksanaan hingga setelah terbentuknya disposal. Pengendalian risiko longsor juga dilakukan salah satunya dalam bentuk pemasangan sensor in-situ untuk memantau kestabilan disposal secara real time dengan pengamatan GPS. Namun, cakupan area pemantauan yang terbatas, biaya peralatan, serta risiko keamanan peralatan menjadi kendala dalam pemantauan kestabilan seluruh area disposal secara in-situ. Interferometric Synthetic Aperture Radar (InSAR) telah menarik perhatian dalam beberapa tahun terakhir untuk pemetaan deformasi permukaan. Penelitian ini berhasil menerapkan metode Small Baseline Subset (SBAS) InSAR citra Sentinel-1A untuk memantau deformasi di area disposal tambang selama periode Januari hingga Juli 2022 di salah satu area disposal milik PT Adaro Indonesia. Hasil deteksi secara time series menunjukkan adanya displacement di area disposal berupa pengangkatan (uplift) dan penurunan (subsidence) muka tanah selama periode pengamatan. Laju deformasi yang diidentifikasi dari metode TS-InSAR dan pengamatan GPS menunjukkan bahwa deformasi tidak terdistribusi secara merata di area disposal, dengan konsentrasi deformasi signifikan terutama di area disposal HW12. Perbandingan antara data InSAR dan GPS menunjukkan nilai RMSE sebesar 3,5 cm dan koefisien korelasi Pearson sebesar 0,83. Meskipun hasil analisis InSAR memiliki akurasi kurang memuaskan, terdapat korelasi yang kuat antara keduanya.
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Mining activity is considered as one of the high-risk business activities for occupational safety and the environment. One of the high-risk mining activities is overburden dumping to disposal. This activity will form slopes that potentially lead to failure. Factors that affect slope stability must be considered in planning, implementation, and after the disposal is formed. Many sensors for risk control are installed to monitor disposal stability such as inclinometer, extensometer, GPS monitoring receiver, and robotic total station. However, the problems such as limited monitoring area coverage, high investment cost, and instruments security risk area remains. Interferometric Synthetic Aperture Radar (InSAR) has gained attention in recent years for mapping surface deformation. This study successfully applied the Small Baseline Subset (SBAS) InSAR method using Sentinel-1A images to monitor deformation in a disposal area owned by PT Adaro Indonesia from January to July 2022. Time-series analysis revealed both uplift and subsidence during the observation period. Deformation rates identified by TS-InSAR and GPS showed an uneven distribution, with significant deformation concentrated in the HW12 disposal area. A comparison between InSAR and GPS data yielded a Root Mean Square Error (RMSE) of 3,5 cm and a Pearson correlation coefficient of 0,83, indicating a strong correlation despite the moderate accuracy of InSAR.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	InSAR, deformasi tambang, penginderaan jauh, SBAS, remote sensing, mining deformation
Subjects:	Q Science > Q Science (General) T Technology > T Technology (General) > T174.5 Technology--Risk assessment. T Technology > TA Engineering (General). Civil engineering (General) > TA1637 Image processing--Digital techniques. Image analysis--Data processing.
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geomatics Engineering > 29101-(S2) Master Thesis
Depositing User:	Gunawan Wisnu Wardhana
Date Deposited:	02 Feb 2026 04:25
Last Modified:	02 Feb 2026 04:26
URI:	http://repository.its.ac.id/id/eprint/131451

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