Prediksi Modulus Elastisitas Batuan Utuh dan Modulus Deformasi Massa Batuan dari Kurva Perilaku Konstitutif Prediction of Modulus of Elasticity of Intact Rock and Rock Mass Deformation Modulus from Constitutive Behavior Curves

Main Article Content

Sari Melati
Riswan

Abstract

Penelitian ini bertujuan untuk memprediksi nilai modulus elastisitas batuan utuh dan modulus deformasi massa batuan. Pemboran inti pada batulempung di kedalaman 35, 42, dan 60 meter serta batubara di kedalaman 164 dan 181 meter telah dilakukan untuk mendapatkan contoh batu berbentuk silinder. Kemudian gaya diukur dan perpindahan titik diamati selama contoh diuji kuat tekan uniaksial. Selanjutnya regangan dan tegangan dihitung untuk membangun kurva perilaku konstitutif. Modulus elastisitas batuan utuh diprediksi dari Modulus Young Rata-rata karena tipe kurva tegangan-regangan contoh batubara dan batulempung yang diuji termasuk fase elastik pendek. Modulus deformasi massa batuan diprediksi dari Modulus Young Sekan yang diukur dari tegangan nol sampai lima puluh persen dari tegangan puncak. Hasil penelitian menunjukan bahwa Modulus Young contoh batubara 0.30 dan 0.44 GigaPascal (GPa), sedangkan contoh batulempung 3.92, 4.14, dan 4.28 GPa. Modulus deformasi massa batuan batubara  diprediksi 0.11 dan 0.35 GPa, sedangkan modulus deformasi massa batuan batulempung diprediksi 2.40, 3.86, dan 4.46 GPa. Dengan demikian dapat dikatakan bahwa batuan sedimen di Formasi Tanjung Kalimantan Selatan memiliki karakteristik modulus deformasi massa batuan yang 20-63% kurang dari modulus elastisitas batuan utuh. Mengingat studi mengenai topik tersebut masih terbatas jumlahnya, data empiris yang didapatkan dari penelitian ini sangat berharga untuk berbagai kepentingan di bidang mekanika batuan. Contoh terapannya yaitu modulus deformasi massa batuan sebagai parameter masukan pada analisis tegangan-regangan di sekitar bukaan tambang bawah tanah menggunakan permodelan numerik, penilaian kondisi tegangan insitu dan distribusi tegangan terinduksi melalui pemantauan pergerakan massa batuan, atau perhitungan energi regangan dari ledakan batuan (rock bursts).

Downloads

Download data is not yet available.

Article Details

How to Cite
[1]
S. Melati and Riswan, “Prediksi Modulus Elastisitas Batuan Utuh dan Modulus Deformasi Massa Batuan dari Kurva Perilaku Konstitutif: Prediction of Modulus of Elasticity of Intact Rock and Rock Mass Deformation Modulus from Constitutive Behavior Curves”, JJMS, vol. 1, no. 2, pp. 77-84, May 2020.
Section
Articles

References

R.A. Sani, “Elastisitas dan Gaya Pegas,” Fisika Terapan Smart. Tangerang : Tira Smart, 2017, 52.

M. Abdullah, “Benda Tegar dan Elastisitas,” Fisika Dasar I. Bandung : Institut Teknologi Bandung, 2016, 670-671.

M.A. Rai, S. Kramadibrata, dan R. K. Wattimena, Mekanika Batuan. Bandung : Penerbit ITB, 2014,19-20, 175-176,

L. Zhang, “Intact Rock,” Engineering Properties of Rock. Elsevier. 2017

A. Majdi and M. Beiki, “Applying evolutionary optimization algorithms for improving fuzzy C-mean clustering performance the deformation modulus of rock mass,” International Journal of Rock Mechanics and Mining Sciences, Vol. 113, P. 172-182, January 2019.

S. Alemdag, Z. Gurucak, A. Cevik, F. Cabalar, C. Gokceoglu, “Modeling deformation modulus of a stratified sedimentary rock mass using neural network, fuzzy inference, and genetic programming,” Engineering Geology, Vol. 203. P. 70-82. March 2016.

M. Beiki, A. Bashari, and A. Majdi, “Genetic programming approach for estimating the deformation modulus of rock mass using sensitivity analysis by neural network,” International Journal of Rock Mechanics and Mining Sciences, Vol. 47, P. 1091-1103, October 2010.

A. Bashari, M. Beiki, A. Talebinejad, “Estimation of deformation modulus of rock masses by using fuzzy clustering-based modeling,” International Journal of Rock Mechanics and Mining Sciences, Vol. 48, P. 1224-1234, December 2011.

E. G. Ravandi, R. Rahmannejad, A. E. F. Monfared, E.G. Ravandi, “Application of numerical modeling and genetic programming to esimate rock mass modulus of deformation,” International Journal of Rock Mechanics and Mining Sciences, Vol. 23, P. 733-737, 2013.

H. Fatahi, Z. Varmazyari, N. Babanouri, “Feasibility of Monte Carlo simulation for predicting deformation modulus of rock mass,” Tunneling and Underground Space Technology, Vol. 89, P. 151-156, July 2019.

I.F. Oge, “Determination of deformation modulus in a weak rock mass by using menard pressuremeter,” International Journal of Rock Mechanics and Mining Sciences, Vol. 112, P. 238-252, December 2018.

B. Kavur, S. Cvitanovic, P. Hrzenjak, “Comparison between plate jacking and large flat jack test result of rock mass deformation modulus,” International Journal of Rock Mechanics and Mining Sciences, Vol. 73, P. 102-114, January 2015.

X. W. Jiang, L. Wan, X. S. Wang, X. Wu, X. Zhang. “Estimation of rock mass deformation modulus using variations in transmissivity and RQD with depth,” International Journal of Rock Mechanics and Mining Sciences, Vol. 46, P. 1370-1377, December 2009.

K. Sugawara, L. Farmarzi, N. Nakamura, “Determination of rock mass deformation modulus by means of traveling load test-Part II : Traveling load test in an open pit,” International Journal of Rock Mechanics and Mining Sciences, Vol. 43, P. 192-202, February 2006.

K. Sugawara, L. Farmarzi, N. Nakamura, “Determination of rock mass deformation modulus by means of traveling load test-Part I : Theory of the traveling load test in an open pit,” International Journal of Rock Mechanics and Mining Sciences, Vol. 43, P. 179-191, February 2006.

A. E. Aladejare, Y. Wang, “Estimation of rock mass deformation modulus using indirect information from multiple sources,” Tunneling and Underground Space Technology, Vol. 89, P. 151-156, March 2019.

M.J. Heap, M. Villeneuve, T. Reuschle, “Rock mass strength and elastic modulus of the Buntsandstein : An important listostratigraphic unit for geothermal exploitation in the Upper Rhine Graben,” Gheotermics, Vol. 77, P. 236-256, 2019.

K. Karaman, F. Cihangir, A. Kesimal, “A comparative assesment of rock mass deformation modulus” International Journal of Rock Mechanics and Mining Sciences, Vol. 25, P. 735-740, 2015.

C.O. Aksoy, M.Genis, O. Yilmaz, “A comparative study of the determination of rock mass deformation modulus by using different empirical approaches,” Engineering Geology, Vol. 131-132, P. 19-28, 2012.

M. Cai, P.K. Kaiser, H. Uno, Y. Tasaka, M. Minami. “Estimation o rock mass deformation modulus and strength of jointed hard rock masses using the GSI system,” International Journal of Rock Mechanics and Mining Sciences, Vol. 41, P. 3-19, January 2004.

X. Feng, R. Jimenez, “Estimation of deformation modulus of rock masses based on Bayesian model selection and Bayesian updating approach,” Engineering Geology, Vol. 199. P. 19-27, December 2015.

Anonim, “Cadangan Batubara Indonesia Sebesar 26 Miliar Ton”, Arsip Berita Kementerian Energi dan Sumber Daya Mineral Republik Indonesia, Tersedia: https://www.esdm.go.id/id/media-center/arsip-berita/cadangan-batubara-indonesia-sebesar-26-miliar-ton [Diakses: 1 November 2019].

D. Susanto, “Kalsel Batasi Produksi Batubara,” Media Indonesia, 30 Agustus 2019 [Online]. Tersedia: https://mediaindonesia.com/read/detail/256425-kalsel-batasi-produksi-batu-bara [Diakses : 1 November 2019].

D. Susanto, “Ekspor Kalsel Terus Tumbuh, Ini 2 Komoditas Andalannya,” Kalimantan, 20 Maret 2019 [Online]. Tersedia: https://kalimantan.bisnis.com/read/20190320/408/902485/ekspor-kalsel-terus-tumbuh-ini-2-komoditas-andalannya [Diakses : 1 November 2019].

S.S. Rita, “Kajian Zonasi Daerah Potensi Batubara untuk Tambang Dalam Provinsi Kalimantan Selatan Bagian Tengah,” Pemaparan Hasil Kegiatan Lapangan Subdit Batubara, Zonasi Batubara Kalsel, 2005.

Brady, H.G. Barry, E.T. Brown, Rock Mechanics For Underground Mining. Springer. 2006.