Dwinagara, Barlian and PRATIWI, DITA IRWANTI and Rosadi, Peter Eka (2018) Analisis Balik Kestabilan Lereng Di Kurai Tanah Liat Area Musim Hujan Mliwang Pt.Holcim Indonesia Tbk Plant Turban Kecamatan Mliwang Tuban Jawa Timur. UPN Veteran Yogyakarta, Yogyakarta. (Unpublished)
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6. Penilaian_ JTP Vol. 4 No. 2_Analisis Balik Kestabilan Lereng di Kuari Tanah Liat.pdf Download (156kB) | Preview |
Abstract
PT.Holcim Indonesia Tbk Tuban Plant is a company engaged in the cement industry with an open-pit mining system with a quarry mining method since 2015. Caly mining activities in the western rainy quarry area of the west uses a single slope geometry still in the initial stages of actual mining of an altitude of 4 m and a slope of 50 0.Based on the FK analysis of the actual slope FK >1.1 results are included in the safe category. However, the actual single slope field experienced failure .Then it is necessary to do a back analiysis on the slope to determine the effect of cohesion on slope stabilytity. Back analysis is done by assuming FK = 1 to look for cohesion values during failure.The cohesion value before the failure occurrend was 72.80 KN/m2 after a reverse analysis had decreased which was 11.90 KN/m2. Slope stabilitiy analysis is done using the Bishop simplified method. Repair of single slope geometry needs to be done to avoid the occurrence of failure again. Determiniation of minimum safety factors uses the reference threshold for FK kepmen Energy and Mineral Resources No.1827 K /30 / MEN, namely FK> 1.1. The single slope recommendations made pay attention to the groundwater level using a simulation of groundwater level which refers to the hoek & Bary chart with five conditions and parameters of slope constittuents during failure. The recommended recommendation for slope geometry is the height of a single slope of 3 m and the slope angle of 600. The results of the analysis concluded that cohesion values decreased from cohesion values prior to the avalanche. This proves that cohesion value affects the level of slope stability. The samaller the cohesion, the samaller the shear strength, so that the stability of the slope decreases. While activities to maintain slope stability in the research area are handling surface water by making waterways to reduce the occurrence of failure.
| Item Type: | Other |
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| Subjects: | T Technology > TN Mining engineering. Metallurgy |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | DR. Ir. MT BARLIAN DWINAGARA |
| Date Deposited: | 02 Feb 2022 04:16 |
| Last Modified: | 09 Feb 2022 08:37 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/28080 |
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