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Cahyadi, Tedy Agung
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Journal : Journal of Engineering and Technological Sciences

 1 
Hydraulic Conductivity Modeling of Fractured Rock at Grasberg Surface Mine, Papua-Indonesia Cahyadi, Tedy Agung; Widodo, Lilik Eko; Syihab, Zuher; Notosiswoyo, Sudarto; Widijanto, Eman
Journal of Engineering and Technological Sciences Vol 49, No 1 (2017)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1592.601 KB) | DOI: 10.5614/j.eng.technol.sci.2017.49.1.3

Abstract

Packer tests and slug tests were conducted at 49 points at the Grasberg surface mine, Indonesia to obtain hydraulic conductivity data. The HC-system approach, which relies on rock quality designation, lithology permeability index, depth index, and gouge content designation, was applied. Geotechnical drill holes in 441 locations, consisting of 4,850 points of information, were used to determine the K values using the equation K = 2x10-6x HC0.5571. The K values, which were within the range of 10-8 and 10-5 m/s, were distributed into five alternative 3D distributions using Ordinary Kriging (OK) and Artificial Neural Network (ANN). The result of the ANN modeling showed that some of the K values, with log K varying from -10.51 m/s to -3.09 m/s, were outside the range of the observed K values. The OK modeling results of K values, with log K varying from -8.12 m/s to -5.75 m/s, were within the range of the observed K values. The ANN modeled K values were slightly more varied than the OK modeled values. The result of an alternative OK modeling was chosen to represent the existing data population of flow media because it fits well to the geological conditions.
Hydraulic Conductivity Modeling of Fractured Rock at Grasberg Surface Mine, Papua-Indonesia Tedy Agung Cahyadi; Lilik Eko Widodo; Zuher Syihab; Sudarto Notosiswoyo; Eman Widijanto
Journal of Engineering and Technological Sciences Vol. 49 No. 1 (2017)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2017.49.1.3

Abstract

Packer tests and slug tests were conducted at 49 points at the Grasberg surface mine, Indonesia to obtain hydraulic conductivity data. The HC-system approach, which relies on rock quality designation, lithology permeability index, depth index, and gouge content designation, was applied. Geotechnical drill holes in 441 locations, consisting of 4,850 points of information, were used to determine the K values using the equation K = 2x10-6x HC0.5571. The K values, which were within the range of 10-8 and 10-5 m/s, were distributed into five alternative 3D distributions using Ordinary Kriging (OK) and Artificial Neural Network (ANN). The result of the ANN modeling showed that some of the K values, with log K varying from -10.51 m/s to -3.09 m/s, were outside the range of the observed K values. The OK modeling results of K values, with log K varying from -8.12 m/s to -5.75 m/s, were within the range of the observed K values. The ANN modeled K values were slightly more varied than the OK modeled values. The result of an alternative OK modeling was chosen to represent the existing data population of flow media because it fits well to the geological conditions.
Co-Authors A. Belo, Delia Ximenes Abdul Halim Pelu Achmad Sadikin Agung Yulianto Nugroho Agustian, Yusrian Aisyah Salma Aji Lambang Hidayah aldin ardian, aldin Alfianto, Danny Algifari, Arif Aminuyati Amrin, Dedy Andrawina Wina Angggian R., Shahensah Anand Anggoro, Hengky Ansori, Muhammad Iqbal Anton Sudiyanto Anton Sudiyanto Ardinanta, Desta Nugraha Arif Munandar aritonang, bobby gersom amari Arrina Khanifa Astika Putri Roshinta Bagus Wiyono Bagus Wiyono Bambang Dwijo Pranowo Barlian Dwinagara Bimantoro, Adyaksa Bagas Butungan, Jeragustivia Dahono Haryanto Dedy Amrin Deka Citra Dinata Delia Ximenes A. Belo Divina Maria Marques Doni Firdaus Fadlil Dwi Januar Ariyanto Dwi Mayanti Mega Lesmana Dwi Poetranto Waloeyo Adji Dwi Yolanda Sumbung Dwinegara, Barlian Dyah Nunki Yalesrie Eddy Winarno Eddy Winarno Eddy Winarno, Eddy Edy Nursanto Edy Nursanto Edy Nursanto Edy Nursanto Edy Nursanto Eman Widijanto Erwedi Erwedi Erwedi, Erwedi Fadlil, Doni Firdaus Faizal Agung Riyadi Ficky Adi Kurniawan Firmansyah, Ilham Fitri Nauli Fitriani Fitriani Gabriel Ranteallo Gandar Mahojwala Genadi Toar Nainggolan Gunawan Nusanto Gunawan Nusanto, Gunawan Gunawan, Risal Habibah, Annisa Ummu Hadi Purwanto Halimah Tusak Diah Hana Trijayanti Hartono Hartono Hartono Hartono Hartono Hartono Hartono Sihir Hasywir Thaib Siri Hasywir Thaib Siri Hasywir Thaib Siri hasywir thaib siri, hasywir thaib Hendriono, Hendriono Hengky Anggoro Herlina Jayadianti Herniti, Dwi Heru Suharyadi Ifa Aulia Chusna Ilham Firmansyah Imawati, Rika Indah Setyowati Indah Setyowati Indun Titisariwati Indun Titisariwati Indun Titisariwati Indun Titisariwati, Indun Inmarlinianto Inmarlinianto, Inmarlinianto Jeragustivia Butungan Jeremia Christopher Herbert Siregar Johan Danu Prasetya kadek nando setiawan nando Karel Lutan Warda Ketut Gunawan Ketut Gunawan Khanifa, Arrina Kresno Kresno Kresno Kresno Kurniawan, Fitra Leka, Emil Salim Kahmi Lesmana, Dwi Mayanti Mega Lilik Eko Widodo Linggasari, Shenny M. Rahman Yulianto Marques, Divina Maria Masjon Parhusip Mendrofa, Yudha Chrisman Moh Ardiansyah Monica Warih Widi Krisanti Muhammad Arifin Nur Muhammad Fathurrahman Pitayandanu Muhammad Iqbal Ansori Muhammad Tri Aditya Muhammad Wildan Ilyasa Nainggolan, Genadi Toar Notosiswoyo, Sudarto Nugroho, Arif Rianto Budi Nur Ali Amri Nur Ali Amri Nur Ali Amri Nur Ali Amri, Nur Ali Nurkhamim Nurkhamim Nurkhamim Nurkhamim, Nurkhamim Pambayu, Aldio Kresna Pasa, Titis Ilham Permadi, Fajar Peter Eka Rosadi Peter Eka Rosadi, Peter Eka Pramono, Sidik Prasetya, Johan Danu Prawira, Hadi Putranto, Fery Izzan R.Horman, Juanita Rahmat Aditya Ramadhana Adi Rusyada Rendy Fahlevi Resa Risal Pradita Rika Ampuh Hadiguna Rika Ernawati Rika Ernawati Rika Ernawati Rika Ernawati Rika Ernawati Rika Ernawati Rika Imawati Risaldi Hidayat Riyadi, Achmad Riyadi, Faizal Agung Rusdi Darmawan S. Koesnaryo Sabrina Umi Khabibah Sari Bahagiarti Kusumayudha Sari Bahagiarti Kusumayudha satria fitrio SB, Waterman Setiyawa, Meindra Shahensah Anand Angggian R. Shofa Rijalul Haq Sigit Bagus Prabowo Singgih Saptono, Singgih Siregar, Imerilda Parlina Soekamto, Untung Stephanus Maria Eduat Sudarto Notosiswoyo Sudaryanto Suharsono Suharsono Suyono Suyono Suyono Suyono Suyono Syafrianto, Syafrianto Syamsul Arifin Syari Rahma Yanti Syihab, Zuher Tasidjawa, Gabriela Elisabeth Tri Aditya, Muhammad Ulfa Nindya Kesuma Warsito utami, Hasrin citra Vega Vergiagara Vinansius Jimmy Jati Waterman SB Waterman SB Waterman SB Waterman SB Waterman Sulistyana Bargawa Waterman Sulistyana Bargawa Waterman Sulistyana Bargawa Waterman Sulistyana Bargawa Waterman Sulistyana Bargawa, Waterman Sulistyana Wawong Dwi Ratminah Wawong Dwi Ratminah, Wawong Dwi Wenny Kartika Widijanto, Eman Widodo, Lilik Eko Widyawanto Prastistho Widyawanto Prastistho Winda Winda Yohana Nodarika Maharani Yohana Noradika Maharani Yohanes Ary Prayoga Yulantoro, Marchell Yulfanzah Zuher Syihab