Engineering Classification of Jointed Rock Mass Based on Connectional Expectation: A Case Study for Songta Dam Site, China

Song, Shengyuan; Xu, Qiang; Chen, Jianping; Zhang, Wen; Cao, Chen; Li, Yongchao

doi:10.1155/2020/3581963

Cited by 3 publications

(2 citation statements)

References 16 publications

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“…Jalalifar et al (2011) combined fuzzy set theory and neural network to propose an adaptive neuro-fuzzy inference system for predicting rock mass grade using a weighted interval for index weight. Song et al (2020) proposed an engineering classi cation method for jointed rock masses based on connectional expectations. By representing evaluation indices utilizing interval number theory, the index weights were determined by the analytic hierarchy process (AHP).…”

Section: Introductionmentioning

confidence: 99%

Developing rock mass classification method using precise description of joints

Jin,

Liang,

Cui

et al. 2023

Environ Earth Sci

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Rock mass classi cation is essential for assessing the quality of macroscopic rock mass and is the basis for rock mass stability analysis and geotechnical engineering design. The joint observation technology limits traditional rock mass classi cation methods in that they only collect joint information from onedimensional or two-dimensional space and cannot comprehensively obtain the joint occurrence in threedimensional space. Consequently, empirical formulas are frequently used in studies on joint distribution laws, resulting in less accurate calculations of joint parameters. This study develops a method for classifying rock masses using a precise description of the joints. Initially, it utilizes the borehole camera and the Sirovision joint scanning system to acquire accurate three-dimensional joint occurrence data. The subjective and objective weights of each evaluation index are derived from the analytic hierarchy process (AHP) and the CRITIC technique according to the cloud model theory. The game theory is then employed to determine the combined weight and evaluate the quality of a rock mass method with the cloud model (GA-CM). The proposed classi cation method is applied to the slope of an open-pit mine. The results indicate that compared to the traditional methods, the proposed method is objective, accurate, and eldapplicable and also reduces the in uence of subjective factors on rock mass quality evaluation and enhances the classi cation reliability.

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Section: Introductionmentioning

confidence: 99%

Developing rock mass classification method using precise description of joints

Jin,

Liang,

Cui

et al. 2023

Environ Earth Sci

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“…Rock fractures have a controlling function in the stability of the rock slope with a planar failure surface [1,2]. e failure inside rock mass often occurs along the weak structural plane, and deformation and failure of rock projects are greatly affected by mechanical properties of the structural plane under the external loading [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Shear Slip Instability Behavior of Rock Fractures under Prepeak Tiered Cyclic Shear Loading

Zhai

Bai

2020

Advances in Civil Engineering

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In this paper, shear displacement properties of rock fractures were studied, and the energy evolution process was analyzed before sliding instability under complex shear loading paths. The artificial prefabrication method was used to simulate the natural rock fractures, which are difficult to obtain in the natural environment. The prepeak tiered cyclic loading tests under constant normal loading were performed on six rock specimens with fractures by rock direct shear apparatus (RDS-200). To obtain the stress difference of adjacent cycles, the direct shear test was conducted on the other six rock specimens with fractures before the prepeak tiered cyclic shear loading test. The variation trend of residual shear displacement (RSD) and the similarity of loading and unloading curves before slip instability were obtained by analyses of prepeak tiered cyclic shear loading test data. Energy evolution laws of rock fractures were analyzed with the consideration of the hysteresis characteristics, according to the hysteresis effect of shear displacement behind shear stress. This paper provides guidance for the study on shear instability of rock fractures under complex loading paths.

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Developing Rock Mass Classification Method Using Precise Description of Joints

Jin

Liang

Cui

et al. 2022

Preprint

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Rock mass classification is essential for assessing the quality of macroscopic rock mass and is the basis for rock mass stability analysis and geotechnical engineering design. The joint observation technology limits traditional rock mass classification methods in that they only collect joint information from one-dimensional or two-dimensional space and cannot comprehensively obtain the joint occurrence in three-dimensional space. Consequently, empirical formulas are frequently used in studies on joint distribution laws, resulting in less accurate calculations of joint parameters. This study develops a method for classifying rock masses using a precise description of the joints. Initially, it utilizes the borehole camera and the Sirovision joint scanning system to acquire accurate three-dimensional joint occurrence data. The subjective and objective weights of each evaluation index are derived from the analytic hierarchy process (AHP) and the CRITIC technique according to the cloud model theory. The game theory is then employed to determine the combined weight and evaluate the quality of a rock mass method with the cloud model (GA-CM). The proposed classification method is applied to the slope of an open-pit mine. The results indicate that compared to the traditional methods, the proposed method is objective, accurate, and field-applicable and also reduces the influence of subjective factors on rock mass quality evaluation and enhances the classification reliability.

show abstract

Engineering Classification of Jointed Rock Mass Based on Connectional Expectation: A Case Study for Songta Dam Site, China

Cited by 3 publications

References 16 publications

Developing rock mass classification method using precise description of joints

Developing rock mass classification method using precise description of joints

Shear Slip Instability Behavior of Rock Fractures under Prepeak Tiered Cyclic Shear Loading

Developing Rock Mass Classification Method Using Precise Description of Joints

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