Investigating mechanical and geometrical effects of joints on minimum caving span in mass caving method

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Alipenhani Behnam; Majdi Abbas; Bakhshandeh Amnieh Hassan

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Journal Paper

Paper Information

Journal: International Journal of Mining and Geo-Engineering Year:2023 | Volume:57 | Issue:12 Page(s): 223-229

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Title

Investigating mechanical and geometrical effects of joints on minimum caving span in mass caving method

Author(s)

Alipenhani Behnam | Majdi Abbas | Bakhshandeh Amnieh Hassan | Issue Writer Certificate

Keywords

Mass caving

Numerical Modeling

Sensitivity analysis

DEM

GEP

Abstract

This paper investigates the effect of jointed rock mass properties on the Minimum Required Caving Span (MRCS) in the block caving method using numeric and heuristic approaches. To do so, the effects of five parameters of jointed rock mass, namely joint set number, joint spacing, joint inclination angle, joint surface friction angle, and undercut depth on MRCS, were investigated using a discrete element code. For this purpose, many numerical models were generated with various rock mass parameters. Moreover, Gene Expression Programming and Artificial Neural Networks were employed to create a heuristic model for MRCS. The model parameters were subjected to Sensitivity analysis. All model input parameters showed sensitivity to the model. There are several effective parameters on MRCS, but joint dip and joint set numbers are the most important and the smallest.

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