ADHREZA, A. and SAPTONO, Singgih and DWINAGARA, Barlian (2016) Evaluation Of Ground Support by Rock Mass Index and Finite Element Method Numerical Modelling PT Cibaliung Sumberdaya Banten. 9 TH, ASIAN ROCK MECHANICS SYMPOSIUM.
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Abstract
PT. Cibaliung Sumberdaya is one gold mining company which using cut and fill method for the underground mining system. In underground mining system, all activity doing in ground from surface. The common problem in underground mining activity is the instability of tunnel. Thus, the corrective action needed is evaluate the ground support system itself. System of ground support certainly requires an analysis from a safety and economic part. Ground support system should be revised refer to mining progress or based on emerging technology in mining area. The evaluation aims to update the primary ground support system in mining which applied by recommendation of Geotechnical Unit, Dept. Quality Control, PT Cibaliung Sumberdaya classified by Rock Mass Rating (RMR) with the new ground support system classified by Rock Mass index (Rmi) ones. The meaning of evaluation is to evaluate from a ground support quantity aspect (total split set requirement and thickness of shotcrete) and ground support effective aspect to gain a high safety value. Manual calculation about safety factor (FK) value, plastic zone, stress distribution surrounding the tunnel also available with added a total displacement and strength factor (SF) value from analysis of numerical calculation finite element method with Phase2 v.07 to ensure the empiric method. Result of research in 3 locations e.g Cikoneng Decline, Cikoneng Xcut 2B level 1125 North, Cikoneng Xcut 4 level 1065 Ore Drive 1 South, evaluation of ground support system by Rock Mass Index (Rmi) more efficient from support quantity and effective from support utility, also give a high value of safety factor for a tunnel. Keywords: Underground Mine, Ground Support, Rock Mass Classification, Finite Element
| Item Type: | Article |
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| Subjects: | T Technology > TN Mining engineering. Metallurgy |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | BARLIAN DWI NAGARA |
| Date Deposited: | 10 Jan 2018 01:28 |
| Last Modified: | 10 Jan 2018 01:28 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/14084 |
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