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-, Supandi
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Earth & Planetary Sciences Engineering

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QUALITY CONTROL KEPADATAN OPTIMUM TIMBUNAN BERDASARKAN FAKTOR DENSITAS DALAM PEMBENTUKAN JALAN PENGANGKUTAN BATUBARA -, SUPANDI
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 8 No 1 Agustus 2015
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v8i1.192

Abstract

ABSTRACT Construction hauling road at the swampy area is very difficult due to weak materials and soft material for the basement. The problem can be determinate with approaching density of material during to reach optimum compaction. To determination optimum compaction can be use wet and dry density method and optimum water content. Laboratory testing at the laboratory is conducted on 95% of compaction include moisture content (ASTM D 2216-80), Specific Gravity (ASTM D 854-23), Attenberg Limit (ASTM D 422-63), Liquid Limit (ASTM D 427), compaction (ASTM D 1557). Field testing is required to compare actual value of basic properties of material and laboratory test and also to get correlation number of compaction with thick of layering material. The result of the study is increasing dry density will be give impact reducing void ratio and porosity. Highest density values have been found at the laterite material (coarse) with density number up to 2.18gr/cm3 during wet condition and during dry condition 1.98 gr/cm3. Highest number of wet density fine material about 2.12gr/cm3 and 1.87gr/cm3 for dry density. Lowest number of density for coarse material about 1.82gr/cm3 (wet) and 1.46gr/cm3 (dry) while for fine material about 1.83gr/cm3 (wet) and 1.55gr/cm3. Construction hauling road at the soft material can be conducted using selective material and keep optimum water content and applying compaction layer by layer to reach optimum compaction.
PENGAMATAN KESTABILAN LERENG TAMBANG MENGGUNAKAN SLOPE STABILITY RADAR (SSR) -, Supandi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v4i1.493

Abstract

Maintenance of the mine slope stability is very important to maintain continuity of mining activities. Although the mine design is done by carefully using several methods and approaches, but often there is a failure due to design limitations of geological information. In this case it is necessary to minimize the effects of a monitoring tool that can detect early indications of instability. In this study aims to determine the function of Slope Stability Radar (SSR) in the monitoring of slope stability is the end goal is to avoid negative impacts and risks of failure can be avoided mine design and sustainability of mining activities can proceed safely. In this study the observations using the Slope Stability Radar (SSR). Radars placed at a point perpendicular to the object in the observed and the radar will emit a wave toward the object and the object wave will be sent back and will be captured by the radar..In this study, the radar is installed in a certain position to monitor the movement of the walls of the mine and the results of research can be in the relationship between the movement of the actual conditions that exist. Monitoring the stability of the wall using the radar continues to be done at the time of stabilization and stabilization has been finished when done. Monitoring was stopped when the mine wall stabilisasi and activity near the ravine has been finished and there is no indication of movement of the slope. From this research produced the conclusion that the use of slope stability radar (SSR) are very helpful and effective for the observation of slope stability, especially to minimize the risk of mining activities.
PREDIKSI KETIDAKSTABILAN LERENG BERDASARKAN DATA HYDROLOGY MONITORING -, Supandi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 6 No 1 Agustus 2013
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v6i1.596

Abstract

Mining activities have a high risk which one of them is the slope stability. Nature provides information about slope instability indication in various ways and methods. Observing indication of instability based on incidents that have occurred is an important study for improvement. One thing to do is viewing the correlation between groundwater position before and after the landslide that by knowing its behavior, the preventive measures against this potential can be reduced or eliminated. Groundwater monitoring installation is commonly done because this data is contributed to the slope stability analysis. Optimizing all existing data sources for various purposes are required to achieve effectiveness and job efficiency. The study was conducted by observing the behavior of groundwater level before the landslide occurred so that it can be deduced correlation between these two things. In this study, ground water level is observed at the closest point to the location of landslide that can reflect the real correlation. Groundwater level observation data were plotted into graphs and combined with related data such as rainfall intensity. Observational data groundwater levels and precipitation associated with the landslide incident can be obtained before the ground water level behavior occur landslide. Plotting generate a form of "horse saddle". Information obtained from this data is the slip surface is formed when the inlet pushed into this field so that the ground water level has decreased. As the slip surface stopped the water will keep filling until it formed a stable and when the groundwater level increasing it is an indication of slope instability will be occur. Based on this study the groundwater level will form a saddle horse pattern before the landslide. When discovering it then it should give extra attention and conduct a risk assessment.
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