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Sains Malaysiana 48(2)(2019): 317–324
http://dx.doi.org/10.17576/jsm-2019-4802-07
Effects
of Tectonic Stresses and Structural Planes on Slope Deformation
and Stability at the Buzhaoba Open Pit Mine, China (Kesan Tekanan
Tektonik dan Satah Struktur pada Canggaan Cerun dan Kestabilan di
Lombong Terbuka, Buzhaoba, China)
SHUZHAO CHEN1,2, GOH THIAN LAI3*, LIU HAN1,2 & GERSON. S. V. TOVELE1
1School of Mines, China
University of Mining and Technology, Xuzhou 221116, China
2State Key Laboratory
of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou
221116, China
3School of
Environmental and Natural Resource Sciences, Faculty of Science and Technology,
43600 UKM Bangi, Selangor Darul Ehsan, Malaysia
Diserahkan: 4 Mei 2018/Diterima: 25 Oktober 2018
ABSTRACT
Tectonic stresses and structural planes are key factors that
affect slope stability. The studies of the effect mechanism of the two factors
on the slope deformation and instability have an important value for realizing
an accurate evaluation of slope stability. The deformation and landslide
problems of the west slope at the Buzhaoba open pit mine were analyzed.
Tectonic stresses and structural planes were confirmed as the main factors of
long-term deformation of the slope. According to an analysis of the regional
structure, the principal stress direction of the Buzhaoba mine was 123° and the
slope sliding mode and discriminant conditions were determined under the
influence of tectonic stress. The principal stress direction was verified by
comparison with the results of displacement monitoring and stability analysis
of the slope. The factor of safety of the slope is 1.29 when considering
tectonic stress and reduces by 7.19% when tectonic stress is not considered.
Keywords: Fault; open pit mine; slope stability; structural plane;
tectonic stresses
ABSTRAK
Tegasan tektonik dan satah struktur adalah faktor utama yang
mempengaruhi kestabilan cerun. Kajian mekanisme kesan dua faktor pada kecerunan
dan ketidakstabilan cerun mempunyai nilai penting dalam mewujudkan penilaian
kestabilan cerun yang tepat. Masalah kecanggaan dan tanah runtuh di cerun barat
di lombong terbuka Buzhaoba telah dikaji. Tegasan tektonik dan satah struktur
telah disahkan sebagai faktor utama dalam perubahan kecanggaan jangka panjang cerun.
Mengikut analisis struktur serantau, arahan tegasan utama lombong Buzhaoba
adalah 123° dan mod gelongsor cerun dan syarat diskriminasi ditentukan di bawah
pengaruh tegasan tektonik. Arah tegasan utama disahkan berdasarkan perbandingan
dengan hasil pemantauan anjakan dan analisis kestabilan cerun. Faktor
keselamatan cerun adalah 1.29 apabila mengambil kira tegasan tektonik dan
menurun sebanyak 7.19% apabila tegasan tektonik tidak diambil kira.
Kata kunci: Kestabilan cerun; lombong pit
terbuka; satah struktur; sesar; tegasan tektonik
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*Pengarang
untuk surat-menyurat; email: gohthianlai@ukm.edu.my
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