Identifying rock blocks based on hierarchical rock-mass structure model |
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Authors: | NengXiong Xu |
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Institution: | XU NengXiong School of Engineering , Technology,China University of Geosciences,Beijing 100083,China |
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Abstract: | Rock-masses are divided into many closed blocks by deterministic and stochastic discontinuities and engineering interfaces
in complex rock-mass engineering. Determining the sizes, shapes, and adjacent relations of blocks is important for stability
analysis of fractured rock masses. Here we propose an algorithm for identifying spatial blocks based on a hierarchical 3D
Rock-mass Structure Model (RSM). First, a model is built composed of deterministic discontinuities, engineering interfaces,
and the earth’s surface, and the deterministic blocks surrounded by these interfaces are traced. Then, in each deterministic
block, a network model of stochastic discontinuities is built and the stochastic blocks are traced. Building a unitary wire
frame that connects all interfaces seamlessly is the key for our algorithm to identify the above two kinds of blocks. Using
this algorithm, geometric models can be built for block theory, discrete element method, and discontinuous deformation analysis. |
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Keywords: | rock-mass engineering discontinuity block identification 3D Rock-mass Structure Model network model of stochastic discontinuities |
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