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All Journal Prosiding Temu Profesi Tahunan PERHAPI Journal of Geosciences and Applied Geology
Princessca, Channia
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Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Engineering

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GEOPLANOLOGY MODELING IN THE PLANNING AREA OF MAJALENGKA, WEST JAVA Nurohim, Dede; Princessca, Channia; Khoirullah, Nur; Sulaksana, Nana; Waliana, Teuku Yan
Journal of Geological Sciences and Applied Geology Vol 2, No 6 (2018): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v2i6.20871

Abstract

Based on the geological condition, the study area consisted of carbonate sandstone units (Tmbp), claystone units (Tml), non-carbonate sandstone units (Tpbp), andesitic intrusions (Ia), volcanic breccia units (Qbv), and alluvium (Qal) units. The different types of constituent rocks will affect the innate characteristics or properties of the rock. The regional genetic units explain kinship relations between lithology, morphology, and tectonics. It is used to determine the genetic processes that occur in an area which will later be developed into the smallest units in the geological analysis. In terms of spatial planning, the geological analysis is needed to produce an ideal area in terms of water adequacy, environmental carrying capacity, and disaster. In accordance with Law No. 11 of 2011 concerning the district development plan of Majalengka, then a layout plan emerged that would be applied to the area. Especially in the research area, land suitability covers a possible area that has a value of> 131, spread in the north to the west of the research area, with high to the very high land capability to be developed. The constrained area which has a value of 121-131 is spread in the north to south of the research area, with the ability of the land to be developed. And the limitation area has a value of <121 dominating in the northwest to the southeast of the research area, with low land capacity - very low to be developed. Based on the analysis, there are still some areas that are not in accordance with the pattern of development which should be mainly the development of protected areas.
ANALISA KESTABILAN LERENG UNTUK MENENTUKAN GEOMETRI OPTIMAL PADA LERENG ANISOTROPIK DI PIT MTH PT KALTIM PRIMA COAL Munthaha, Zidni Ilman; Princessca, Channia
Prosiding Temu Profesi Tahunan PERHAPI 2023: PROSIDING TEMU PROFESI TAHUNAN PERHAPI
Publisher : PERHAPI

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Abstract

Pada lereng yang terdiri dari batuan sedimen dengan struktur laminasi, pembentukan lereng yang sejajar dengan kemiringan lapisan batuan membentuk lereng anisotropik. Ketidakstabilan lerengnya dipengaruhi oleh kekuatan geser pada bidang lemah yang muncul, bukan hanya dari kekuatan geser batuan itu sendiri. Penelitian ini difokuskan pada analisa kestabilan lereng di low-wall Pit MTH dengan menggunakan model anisotropik yang terdapat bidang lemah dan diinterpretasikan oleh bidang perlapisan. Anisotropik dimasukkan dalam model 2D menggunakan model material Generalized Anisotropic di Slide2, sedangkan kedudukan batuan didasarkan pada pengukuran langsung di lapangan. Untuk mendapatkan geometri optimal lereng, dilakukan beberapa simulasi perhitungan faktor keamanan terhadap variasi ketinggian lereng tunggal yang kemudian menjadi parameter awal dalam penentuan lebar jenjang minimum. Kombinasi lereng tunggal dan lebar jenjang optimal yang membentuk lereng keseluruhan selanjutnya dilakukan perhitungan faktor keamanannya kembali guna memvalidasi setiap bagian lereng memenuhi kriteria geoteknik yang telah ditentukan. Dari hasil perhitungan, didapatkan geometri lereng low-wall Pit MTH optimal dapat dibentuk dengan lereng tunggal setinggi 15m dan lebar jenjang minimal 15m dengan bidang lemah yang dimodelkan berupa kontak perlapisan. 
Co-Authors Khoirullah, Nur Munthaha, Zidni Ilman Nana Sulaksana Nurohim, Dede Waliana, Teuku Yan