Assessment of Rock Mass Classification System for Intrusive Rock with Weathering at Wukirsari Area

Rakhman, Arie Noor and Zakaria, Zufialdi and Muslim, Dicky and Haryanto, Iyan and Mulyaningsih, Sri and Muchlis, Muchlis (2018) Assessment of Rock Mass Classification System for Intrusive Rock with Weathering at Wukirsari Area. In: Programme Book of International Conference on Geosciences 2018 (ICG 2018). Faculty of Science and Natural Resources Universiti Malaysia Sabah, Kota Kinabalu. ISBN 2443-4078 (Unpublished)

[img] Text (Jurnal)
Programme Book ICG2018_Rakhman et all 2018.pdf - Accepted Version

Download (1MB)
[img] Text (Sertifikat)
Sertifikat ICG2018_Arie Noor Rakhman.pdf - Accepted Version

Download (271kB)


The research area is located in Wukirsari area, Bantul Regency, Yogyakarta Special Region, Indonesia. In the research area, there were several unstable rock slopes. Mass movements have occurred through rock discontinuities into rock falls. Lithology of valleys at research area consists of basalt intrusion, part of Nglanggran Formation. In basalt, many joints are found with three joint sets which form a single joint system of the columnar joint structure. Methods for assessing rock mass classification using RMR and SMR. Based on the RMR value between 38 and 54 and the SMR value between 53 and 69, the equation in the form of SMR = 28,621e0,0164x is obtained. Low RMR and SMR values at the bottom of the valley cliff are influenced by the parameters of joint wall conditions. Some corestone are found as a spheroidal weathering formation. The largest corestone size (10 cm - 40 cm) is at the bottom of the cliff, following the joint spacing with the RQD value between 98.25% and 80.88%. The lowest rock strength (35.85 MPa - 114.12 MPa) at the bottom of the cliff is influenced by the presence of weathered joint walls, dominantly the composition of plagioclase minerals that have been altered to smectite (26.67% - 8%). Several jointsfilled with material rich in iron sulfide minerals that have been oxidized to sulfatemineral, natrojarosite, with a composition reaching 44.64%.

Item Type: Book Section
Subjects: Q Science > QE Geology
Divisions: Fakultas Teknologi Mineral > Teknik Geologi (S1)
Depositing User: Arie Noor Rakhman
Date Deposited: 03 Feb 2022 01:58
Last Modified: 03 Feb 2022 01:58

Actions (login required)

View Item View Item