WAHYUDI, DIAN (2012) PENAKSIRAN SUMBERDAYA PASIR BESI MENGGUNAKAN METODE CROSS SECTION DI PT.TUNAS SEJATI MANDIRI DESA GLEMPANG PASIR KECAMATAN ADIPALA KABUPATEN CILACAP JAWA TENGAH. Other thesis, UPN "Veteran" Yogyakarta.
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Abstract
RINGKASAN
Perusahaan memerlukan penaksiran sumberdaya untuk perencanaan penambangan
pasirbesi di PT. Tunas Sejati Mandiri, Desa Glempang Pasir, Kecamatan Adipala, Kabupaten
Cilacap, Jawa Tengah. Data eksplorasi yang ada berupa data bordan derajat kemagnetan.
Data yang didapatkan, dianalisa agar dapat memberikan suatu gambaran endapan pasirbesi
dan jumlah tonase pasirbesidi daerah penelitian tersebut.
Metode penelitian yang akan diterapkan dalam penelitian ini adalah penaksiran
sumberdaya menggunakan metode cross section dengan membandingkan antara Rule of
Gradual Change dan Rule of Nearest Point. Tujuannya untuk mengetahui berapa besar
Sumberdaya Pasirbesi terukur.
Pasirbesi yang diteliti yaitu dengan ketebalan berkisar antara 0,3-5,1 m dengan derajat
kemagnetan daerah penelitian antara 50 % MD-58% MD. Penyebaran pasirbesi di daerah
penelitian menyebar ke segala arah dengan kadar yang bervariasi, kadar tertinggi berada di
dekat pemukiman dan bentangan tanah pasir pada titik B-18 sebesar 58,7%. Kadar terendah
berada di daerah sekitar tegalan dan persawahan pada titik B-23 sebesar 50,1%. Ketebalan
maksimum pada titik B-6 dengan ketebalan 5,1 m dan ketebalan minimum terdapat pada titik
B-21 dengan ketebalan 0,3 m. Pedoman perubahan bertahap (Rule of Gradual Change)
dilakukan dengan menghubungkan penampang satu dengan penampang lainnya, sehingga
setiap perhitungan volume dibatasi oleh dua penampang dan diperoleh Sumberdaya
seluruhnya sebesar 1.163.463,3 Ton. Pedoman titik terdekat (Rule of Nearest Point)
dilakukan dengan penarikan garis batas penampang dengan cara setengah jarak antar
penampang dan diperoleh Sumberdaya seluruhnyasebesar 1.163.467,6Ton. Berdasarkan
Standar Nasional Indonesia (SNI) SNI 13-4726-1998, Sumberdaya pasirbesi pada lokasi
penelitian dapat diklasifikasikan sebagai Sumberdaya pasirbesi terukur.
Besarnya tanah penutup (Overburden) dengan Pedoman Perubahan Bertahap (Rule of
Gradual Change) adalah 408.467,9 BCMdan Pedoman Titik Terdekat (Rule of Nearest Point)
adalah 409.915,4 BCM.
Adanya perbedaan hasil dari ke dua pedoman maka disarankan hasil penaksiran
sumberdaya pasirbesi yang terkecil dipakai sebagai dasar perhitungan produksi. Walaupun
dipilih yang terkecil diharapkan Sumberdaya tertambang kenyataan nantinya tidak lebih kecil
dari hasil penaksiran sumberdaya pasirbesi.
ABSTRACT
Enterprise have to conduct resources assessment of the iron sand mining in PT. Tunas
Sejati Mandiri, Glempang Pasir Village, District Adipala, Cilacap, Central Java. Existing
exploration data is drill data and degree of magnetization. Datawhich had obtained, analyzed
in order to provide an overview of iron sand deposits and the amount of tonnage iron sand in
the study area.
Research methods that will apply in this study is resources assessment by comparing method
of cross section, Rule of Gradual Change and Rule of Nearest Point. The goal is to find out
how much iron sand resources measured.
Iron sand that observed had thickness ranging from 0.3 to 5.1 m with degree of
magnetism research areas between 50% MD -58% MD. Iron sand deployment in research
area spread in all directions at varying levels, the highest levels are in a stretch of land near
the settlement and sand at the point of B-18 for 58.7%. Lowest levels are in the area around
the moor and the rice fields at the point of B-23 for 50.1%. The maximum thickness at the
point of B-6 with a thickness of 5.1 m and contained a minimum thickness at the point of B-21 with a thickness of 0.3 m. Guidelines for gradual change (Rule of Gradual Change) is
done by connecting the cross-sectional one with another, so that any calculation of the
volume bounded by two cross sections and obtain resources for all of 1,163,463.3 tons.
Guidelines for nearest point (Rule of Nearest Point) performed with cross border demarcation
by half the distance between cross sections and obtain resources for all of 1,163,467.6 tons.
Based on the Standard National Indonesia (SNI) SNI 13-4726-1998, iron sand sources at the
study site can be classified as measurable iron sand sources.
The amount of overburden with Rule of Gradual Changewas 408,467.9 BCM and
Rule of Nearest Point was 409,915.4 BCM.
Cause the difference results of the two guidelines so writer suggested result of the
smallest iron sand sources are used as the basis for calculating the production. Although the
smallest iron sand sources is chosen, hopefully in reality will not be smaller than the iron
sand sources assessment.
| 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: | Ratna Sufiatin |
| Date Deposited: | 21 Jun 2016 04:46 |
| Last Modified: | 21 Jun 2016 04:46 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/4087 |
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