Determination of the Ultimate Underground Mining Depth considering the Effect of Granular Rock and the Range of Surface Caving

<div>Numerical model of the lower iron belt of the southeast mining area in the Gongchangling Iron Mine: the numbers in (b) are the sequence of excavation or filling. (a) The three-dimensional finite element model. (b) The slice in the <i>XZ</i> direction (<i>Y</i> = 75).</div>

Mathematical Problems in Engineering

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Figure 3

Figure 3: Determination of the Ultimate Underground Mining Depth considering the Effect of Granular Rock and the Range of Surface Caving 