Numerical Simulation of Dimension Effect to Deformation in the Cataclastic Medium Goafs Using UDEC

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• 作者：Jianhua Hu ; Dezheng Lao ; Qingfa Chen ; Keping Zhou ; Yingmen Huang
• 关键词：cataclastic medium ; discrete element ; deformation ; goafs
• 刊名：Lecture Notes in Computer Science
• 出版年：2010
• 出版时间：2010
• 年：2010
• 卷：5938
• 期：1
• 页码：183-190
• 全文大小：302.8 KB

文摘

In cataclastic rock medium, goafs are the potential security hidden troubles in the mining process. The sort of goafs has the characteristics of the large deformation in roof rock mass. In order to predict the deformation of roof, the numerical method was used under the mining goafs. Using the universal distinct element code (UDEC), three working condition goafs with different sizes were carried out the numerical simulation tests. For three structure sizes, the goafs surrounding rock all displayed the above deformation characteristics. According to the difference of goafs structure sizes, the roof displacements reached a 19.11mm, 26.78mm, and 47.35mm respectively. The analyses for plastic zone in the three conditions showed that the holistic span of plastic zones changed with the goafs size; the plastic zones transfixed gradually in roof, and formed the caving zones at last. Regarding to deformation characteristics of different sizes, these measures were provided, such as a network anchor injection, the lateral filling, cement grouting, and so on. The research results showed that in the cataclastic medium, the sizes of goafs’ structure has an obvious impact on the deformation of surrounding rock; the deformation increases with the sizes gradually; the goafs treatment measures provided could effectively guarantee the safety of mine production.