HERMAWAN, IRWAN (2015) RANCANGAN GEOMETRI LERENG PADA TAMBANG BIJIH EMAS DI PT. GORONTALO SEJAHTERA MINING, DI LOKASI DAERAH ILOTA, KECAMATAN BUNTULIA, KABUPATEN POHUWATO, PROVINSI GORONTALO. Other thesis, UPN "VETERAN" YOGYAKARTA.
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Abstract
PT. Gorontalo Sejahtera Mining., Is the holder of a business license mining the
location of on-site district Ilota, Buntulia, Regency Pohuwato, Gorontalo Province.
For expansion plans of mining in the mountains pani, to do the analysis of
geotechnical that plan of mining can be supported with data that are accurate in the
case of the stability of slopes. Recommendations geotechnical would be for the entire
design of mining made by PT. Gorontalo Sejahtera Mining. Analysis of the stability
of slopes is done on slopes of mining, Location GT07, GT08, GT10, GT11, section,
and Waste dump.
Geotechnical analysis starts with taking samples of rock material at several
locations, followed by laboratory testing of the samples to obtain the material
properties to be used in geotechnical modeling.
Based on the results of laboratory tests, including rock strength in the slopeforming material in each location that will be studied are classified as very weak
rock, thus potentially possible avalanches arc. Modeling using the limit equilibrium
method with the help of Slide Software 5.0 by Rocscience with slopes in the steady
state guidelines for single slope is ≥ 1.3 FK and FK to the overall slope ≥ 1.5(Public
Works Department).
After doing some geotechnical modeling simulations at all locations to be
analyzed, it can be determined that the optimum slope geometry into the slope
recommendations to the mining area, single slope geometry Recommendations for
safe research sites. Recommendations for the overall slope geometry research
location on the corner of 50⁰, a height of 200 meters and the 5-meter berm declared
safe. Slope incision is not necessary to repair the geometry because the geometry of
the existing draft is stable. Single slope recommendations waste dump with a height
of 10 m and a slope angle 40o then FK = 1.5, with a high slope keseluruhan100 m
and the overall slope angle of 26o, then the waste dump slopes are safe on the slopes
of the entire berm 10 meters with the angle and height of 50 meters 40
PT. Gorontalo Sejahtera Mining., adalah pemegang izin usaha pertambangan
dengan lokasi di lokasidaerahIlota, KecamatanBuntulia, KabupatenPohuwato,
ProvinsiGorontalo. Untuk pengembangan rencana penambangan di gunungpani,
perlu dilakukan analisis geoteknik agar rencana penambangan tersebut dapat
didukung dengan data yang akurat dalam hal kestabilan lereng. Rekomendasi
geoteknik akan diberikan untuk seluruh designpenambangan yang telah dibuat oleh
PT. Gorontalo Sejahtera Mining.Analisis kestabilan lereng dilakukan pada lereng
penambangan, Lokasi GT07, GT08, GT10, GT11, sayatan, dan Waste dump.
Analisis geoteknik dimulai dengan pengambilan sample material batuan di
beberapa lokasi, kemudian dilanjutkan dengan melakukan pengujian laboratorium
terhadap sample tersebut sehingga didapatkan properties material yang akan
digunakan dalam permodelan geoteknik.
Berdasarkan hasil uji laboratorium, kekuatan batuan yang termasuk dalam
material pembentuk lereng di setiap lokasi yang akan dikaji diklasifikasikan sebagai
batuan sangat lemah, sehingga dimungkinkan berpotensi terjadi longsoran busur.
Pemodelan menggunakan metode kesetimbangan batas dengan bantuan Software
Slide 5.0 by Rocsciencedengan pedoman lereng dalam keadaan mantap untuk lereng
tunggal adalah FK ≥ 1.35 dan untuk lereng keseluruhan FK ≥ 1.5
(DinasPekerjaanUmum).
Setelahdilakukanbeberapasimulasipermodelangeoteknik di semualokasi yang
akandianalisis, makadapatditentukangeometrilereng optimum yang
menjadirekomendasilerenguntuk area tambang, Rekomendasi untuk geometri lereng
tunggal lokasipenelitianaman.Rekomendasi untuk geometri lereng keseluruhan
lokasipenelitianpadasudut 50⁰, tinggi 200 meter danpada berm 5 meter
dinyatakanaman.Lerengsayatantidakperludilakukanperbaikangeometrikarenarancangangeo
metri yang adasekarangsudahstabil. Rekomendasilerengtunggalwaste dumpdengantinggi
10 m dansudutlereng 40
o
maka FK = 1,5, dengantinggilereng keseluruhan100 m
dansudutlerengkeseluruhan 26
o
, maka lereng waste dump yang aman pada lereng
keseluruhan berm 10 meter dengan sudut 40⁰dan tinggi 50 meter
| Item Type: | Thesis (Other) |
|---|---|
| Subjek: | T Technology > TN Mining engineering. Metallurgy |
| Divisions: | x. Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Darsini Darsini |
| Date Deposited: | 12 May 2016 04:18 |
| Last Modified: | 12 May 2016 04:18 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/746 |
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