Analisis Hasil Pemantauan Deformasi Lereng Disposal Menggunakan Robotic Total Station dan Time Series InSAR pada Tambang Muara Enim, Sumatera Selatan

Sumedi, Annisa Zahiyah Tsabitha (2026) Analisis Hasil Pemantauan Deformasi Lereng Disposal Menggunakan Robotic Total Station dan Time Series InSAR pada Tambang Muara Enim, Sumatera Selatan. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Aktivitas penambangan terbuka pada area disposal dapat menyebabkan perubahan kondisi geoteknik lereng yang memicu terjadinya deformasi dan berpotensi menurunkan kestabilan lereng tambang. Oleh karena itu, diperlukan sistem pemantauan deformasi yang mampu memberikan informasi pergerakan lereng secara akurat dan kontinu. Penelitian ini bertujuan menganalisis pergerakan lereng tambang menggunakan Robotic Total Station (RTS) dan SBAS InSAR, serta mengevaluasi kesesuaian nilai displacement dan velocity hasil SBAS InSAR terhadap pengukuran RTS pada area Disposal in Pit Dump B. Data RTS digunakan untuk memperoleh informasi pergerakan titik-titik pantau lereng pada arah horizontal dan vertikal dengan interval pengamatan harian, sedangkan SBAS InSAR memanfaatkan citra Sentinel-1 berbasis time series untuk memantau deformasi sepanjang arah Line of Sight (LOS). Hasil penelitian menunjukkan bahwa pergerakan lereng pada Disposal in pit Dump B didominasi oleh pergerakan horizontal dengan arah relatif konsisten ke timur laut pada kisaran azimuth 30°- 68°, sedangkan komponen vertikal relatif kecil dan sebagian besar masih berada dalam rentang ketidakpastian pengukuran. Berdasarkan hasil pengamatan RTS, seluruh titik pantau secara umum berada dalam kategori aman selama periode 4 Januari hingga 11 April 2025. Meskipun beberapa epoch pada akhir periode pengamatan mencatat nilai velocity yang lebih tinggi dibandingkan epoch lainnya, sebagian besar hasil pengamatan tetap menunjukkan nilai velocity di bawah 50 mm/hari. Sedangkan, hasil SBAS InSAR yang menunjukkan deformasi kumulatif pada keseluruhan area Disposal B didominasi arah negatif dengan nilai rata-rata velocity LOS mencapai -72,61 mm/tahun dan pada skala keseluruhan site nilai rata-rata velocity LOS sebesar -45,83 mm/tahun yang mengindikasikan pergerakan permukaan menjauh dari sensor satelit. Perbandingan SBAS InSAR dan RTS pada titik T3 menghasilkan korelasi Pearson sebesar r = 0,81 dengan nilai R² = 0,65 yang menunjukkan hubungan kuat dan signifikan antara kedua metode, meskipun masih terdapat perbedaan nilai deformasi dengan RMSE sebesar 6,80 cm akibat perbedaan karakteristik pengukuran masing-masing metode dan lokasi titik T3 yang cenderung memiliki koherensi yang rendah. Secara umum, integrasi SBAS InSAR dan RTS mampu memberikan informasi deformasi lereng yang lebih menyeluruh, meskipun masing-masing metode memiliki karakteristik, kelebihan, dan keterbatasan yang perlu dipertimbangkan dalam interpretasi hasil pemantauan.
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Open-pit mining activities in disposal areas can alter slope geotechnical conditions, causing deformation and potentially reducing slope stability. Therefore, a deformation monitoring system capable of providing accurate and continuous slope movement information is required. This study aims to analyze slope movement using a Robotic Total Station (RTS) and SBAS InSAR, and to evaluate the agreement between displacement and velocity derived from SBAS InSAR and RTS measurements in the Disposal in Pit Dump B area. RTS data were used to obtain horizontal and vertical movement information from monitoring points at daily intervals, while SBAS InSAR utilized Sentinel-1 time-series imagery to monitor deformation along the Line of Sight (LOS). Results indicate that slope movement at Disposal in Pit Dump B was predominantly horizontal, with a relatively consistent northeastward direction within an azimuth range of 30°–68°, whereas the vertical component remained relatively small and generally within the measurement uncertainty. Based on RTS observations, all monitoring points were generally classified as stable during the observation period from 4 January to 11 April 2025. Although several epochs near the end of the monitoring period recorded higher velocity values, most observations remained below 50 mm/day. Meanwhile, SBAS InSAR results showed that cumulative deformation across Disposal B was dominated by negative LOS displacement, with an average LOS velocity of −72.61 mm/year, while the site-wide average LOS velocity was −45.83 mm/year, indicating ground movement away from the satellite sensor. Comparison between SBAS InSAR and RTS at monitoring point T3 yielded a Pearson correlation coefficient of r = 0.8 and an R² value of 0.65, indicating a strong and significant relationship between the two methods. However, differences in deformation values remained, with an RMSE of 6.80 cm, which may be be attributed to the different measurement characteristics of the two methods and the relatively low coherence at the T3 location. Overall, integrating SBAS InSAR and RTS provides more comprehensive information on slope deformation, although the characteristics, strengths, and limitations of each method should be considered when interpreting the monitoring results.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Deformasi Lereng, Pemantauan Disposal, Robotic Total Station, Time-Series InSAR, Robotic Total Station, Slope Deformation, Time-Series InSAR, Waste Dump Monitoring.
Subjects:	G Geography. Anthropology. Recreation > G Geography (General) > G70.217 Geospatial data G Geography. Anthropology. Recreation > GB Physical geography > GB651 Subsidences (Earth movements)
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geomatics Engineering > 29202-(S1) Undergraduate Thesis
Depositing User:	Annisa Zahiyah Tsabitha Sumedi
Date Deposited:	20 Jul 2026 07:55
Last Modified:	20 Jul 2026 07:55
URI:	http://repository.its.ac.id/id/eprint/135729

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