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INDONESIA
Jurnal Ilmu Teknik
Published by Universitas Sriwijaya
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Articles 3 Documents
 1 
Studi Karakteristik Perilaku Rayapan Geser Batulumpur Skala Laboratorium Diana Purbasari
Jurnal Ilmu Teknik Vol 1, No 1 (2012): source rock and reservoir
Publisher : Sriwijaya University

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Abstract

STUDI KARAKTERISTIK PERILAKU RAYAPAN GESER BATULUMPUR SKALA LABORATORIUM   Diana Purbasari 1,2), Suseno Kramadibrata 3), Nuhindro Priagung Widodo 4) 1) Mahasiswa Program Magister Program Studi Rekayasa Pertambangan ITB 2)Jurusan Teknik Pertambangan UNSRI 3,4) Program Studi Teknik Pertambangan ITB   ABSTRAK   Kestabilan lereng di tambang terbuka batubara (open pit) dengan batuan lapisan penutup (overburden) batulumpur merupakan salah satu perhatian bagi manajemen tambang, agar kegiatan penambangan berlangsung dengan baik dan aman. Parameter kuat geser jangka panjang dari batulumpur seperti kohesi dan sudut gesek dalam skala laboratorium dapat diperoleh dengan memahami karakteristik dari perilaku creep dari contoh batulumpur. Penelitian menggunakan tegangan normal (σn) sebesar 3,18% σc dan tegangan geser (t) sebesar 80% dari tegangan geser puncak (tp). Perilaku rayapan geser didekati dengan persamaan Empiris, Rheologi General Kelvin dan Rheology Burger. Hasil perhitungan kurva persamaan Empiris, Rheologi General Kelvin dan Rheology Burger relatif mendekati kurva hasil uji rayapa geser langsung. Selanjutnya kekuatan jangka panjang kedua contoh batulumpur dari hasil perhitungan dengan persamaan Rheologi General Kelvin dan Rheology Burger masing-masing mengalami penurunan sebesar 50% dan 55% serta 50% dan 52% dari kuat geser puncak (tp).   Kata kunci: CREEP mudstone, karakteristik mudstone, kekuatan jangka panjang batuan   ABSTRACT Slope stability of open pit coal mines with overburden of mudstone is one of the concerns of the mine management to keep the mine operating well and safely. Long term shear strength parameters of mudstone such as cohesion and internal friction angle in laboratory scale can be obtained by comprehending the characteristics of creep behaviour of the mudstone samples. This research used normal stress (σn) of 3,18 from σc and shear stress (t) of 80% from the peak shear stress (tp). The creep behaviour of mudstone may approached by empirical model, General Kelvin Rheology and Burger Rheology. The calculation provides of empirical equation curves, suggest that General Kelvin Rheology and Burger Rheology relatively approach the curve of direct shear creep test. Futhermore, the longterm strength of the two mudstone samples from calculation of General Kelvin Rheology and Burger Rheolgy equation decrease 50% and 55% also 50% and 52% from peak shear stress (tp). Keywords: CREEP mudstone, mudstone characteristic, longterm rock strength
PENGARUH WAKTU PEMASAKAN DAN VOLUME LARUTAN PEMASAK TERHADAP VISKOSITAS PULP DARI AMPAS TEBU Rizkia Arliani
Jurnal Ilmu Teknik Vol 1, No 1 (2012): source rock and reservoir
Publisher : Sriwijaya University

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Abstract

Bagasse contains cellulose a fairly high, so it can be used as alternative raw materials pulping. Process pulping used in this study is acetosolv process, which is releasing fibers of bagasse with acetic acid solution. This study looked at the effect of cooking time and cooking solution volume of % yield and viscosity of the pulp produced. Range of variables used in this study is the cooking time 90, 120, 150, and 180 minutes with a volume of a solution of acetic acid cookers 100, 120, 140 and 160. The results were analyzed to obtain quality pulp viscosity and % yield. Pulp obtained best results when cooking 90 minutes, with the volume of a solution of 100 ml of acetic acid cooker.
Spanning Tree Protocol Candra Setiawan
Jurnal Ilmu Teknik Vol 1, No 1 (2012): source rock and reservoir
Publisher : Sriwijaya University

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Abstract

Spanning Tree Protocol (STP) yang mencegah terjadinya loop di dalam suatu jaringan. Serta akan membahas mengenai Redundancy dalam suatu jaringan, broadcast storms, stp algoritma, serta cara membuat root bridge dan mengkonfigurasinya pada vlan dan membahas mengenai root bridge, BPDU, dan membuat topologi vlan, vtp, intervlan routing, DHCP, stp.

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