Rock Mass Quality Prediction of Open-Pit Gold Mine Slope Based on the Kriging Interpolation Method
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ORIGINAL PAPER
Rock Mass Quality Prediction of Open-Pit Gold Mine Slope Based on the Kriging Interpolation Method Zhigang Tao Hong Chen
. Xuebin Cui . Xiaoming Sun . Jiong Wang . Kuiming Liu .
Received: 23 April 2020 / Accepted: 29 May 2020 Springer Nature Switzerland AG 2020
Abstract Rock quality index (RQD) is a parameter which reflects the degree of rock fragmentation and is an important index for evaluating the stability and properties of rock masses in the field. Taking Chang Shanhao open pit gold mine in Inner Mongolia as the research object, RQD data from geological exploration drill core from the southwest stope are analyzed using the indicator Kriging interpolation method, which are then used as the sample points for variogram fitting in order to simulate the spatial variability of
Z. Tao (&) X. Cui X. Sun J. Wang K. Liu H. Chen State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China e-mail: [email protected]
rock mass quality. Based on the geostatistics simulation prediction, the rock quality of the stope is predicted via interpolation, and a three-dimensional model corresponding to the RQD percentage and the risk of the slope rock mass is established to predict the quality of the slope rock mass of the stope, and a threedimensional rock mass quality prediction diagram is constructed. Results show that the potential landslide area in the three-dimensional rock mass quality prediction map is consistent with field data and is consistent with the landslide disaster area revealed by excavations. Keywords Kriging interpolation method Geostatistics The landslide disaster area Rock mass quality prediction RQD
X. Cui e-mail: [email protected] X. Sun e-mail: [email protected]
1 Introduction
J. Wang e-mail: [email protected]
In recent years, many open-pit mines in China have gradually progressed into large mining depths and steep slope mining. Rock mass instability increases with increasing mining depth and slop angle, which can cause geologic disasters such as landslides (Yang et al. 2012), seriously threatening the safety of mine workers and machinery. An accurate rock mass quality classification is the basis of slope stability analysis and mine design (Jiang et al. 2020; Ren et al. 2020; Wang et al. 2020a).
K. Liu e-mail: [email protected] H. Chen e-mail: [email protected] Z. Tao X. Cui X. Sun J. Wang K. Liu H. Chen School of Mechanics and Civil Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China
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Geotech Geol Eng
Many scholars have carried out a lot of research on the evaluation of rock mass quality, and achieved fruitful results (Li et al. 2019; Ren et al. 2019; Feng et al. 2020; Wang et al. 2020b; Qin et al. 2019). You (2002) carried out horizontal push in-situ shear tests on soil rock mixtures and rock debris from the upper part of a grade III terrace from the Baiyan landslide and obtained the
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