Model of Analysis for Ground Subsidence Due to Deep Sub-critical Mining of Iron Ore-deposit in Soft Rock Strata

Based on results of the statistical analysis of a large amount of measured data in mining engineering,the theoretical model for analysis of ground subsidence due to deep sub-critical mining of iron ore-deposit is established by using the theory of stochastic medium.The formulas of two-dimensional and three-dimensional problems are developed and applied to the prediction of the ground subsidence due to deep sub-critical mining by pillarless sublevel caving method.The agreement of the theoretical results with the field measurements shows that the model is satisfactory and the formulae obtained are valid and thus can be effectively used for predicting the ground subsidence due to deep sub-critical mining of iron ore-deposit.