...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Rock Mechanics and Mining Sciences >Prediction of mining-induced surface subsidence and ground movements at a Canadian diamond mine using an elastoplastic finite element model
【24h】

Prediction of mining-induced surface subsidence and ground movements at a Canadian diamond mine using an elastoplastic finite element model

机译：采用弹塑性有限元模型预测加拿大钻石矿井采矿诱导的表面沉降和地面运动

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

AbstractA full three dimensional elastoplastic finite element model of Diavik Diamond Mine is developed to predict surface-induced ground movement due to underground blasthole stoping activities. A mesh convergence study has been conducted to reach to an optimum meshing scenario when further mesh refinements produce a negligible change in the results. This way the calculation cost and time has been managed successfully. Furthermore, sequences of the excavation/backfilling in the model are defined according to the mine production plan; however, some simplifications in the shape of the stopes have been made. Consequently, the developed finite element model simulates the complete stress-strain path through the entire excavation and backfilling simulation steps in full three dimensional space. The model is calibrated using two extensometers installed on the back of two secondary undercut drifts in one of the Kimberlite pipes. The results of the calibrated model are validated using pit surface prism monitoring system data. The average relative error between the measured data and FE model predictions is 7.95%. It is shown that the numerical predictions of the mining-induced surface subsidence, due to the blasthole stoping mining method, matched well with the Gaussian distribution. A significant increase, approximately by 44%, to the amount of the induced settlements on the surface occurred as the mining activities reaches near surface ground levels. Finally, the comparison between the predicted results of the finite element model and monitoring data showed that the predictive capacity of the numerical model is a valuable tool for stability and design analysis of underground mines.]]>
机译：<！[cdata [ 抽象 开发了Diavik钻石矿石的全套三维弹性塑料有限元模型，以预测由于地下Blasthole停止活动而导致的地面引起的地面运动。当进一步的网格细化产生结果的更大变化时，已经进行了网格融合研究以达到最佳的啮合场景。以这种方式，计算成本和时间已成功管理。此外，根据矿山生产计划定义了模型中的挖掘/回填的序列;然而，已经制造了止挡形状的一些简化。因此，开发的有限元模型通过整个挖掘和完整三维空间的回填模拟步骤来模拟完整的应力 - 应变路径。使用安装在一个Kimberlite管道中的两个次级底切漂移的两个突出器校准模型。使用坑面棱镜监测系统数据进行验证校准模型的结果。测量数据和FE模型预测之间的平均相对误差为7.95％。结果表明，采矿诱导的表面沉降的数值预测，由于挡板停止采矿方法，与高斯分布相匹配。随着采矿活动达到表面地面水平近似的诱导沉淀物的诱导沉淀量大约增加了44％。最后，有限元模型和监测数据的预测结果之间的比较表明，数值模型的预测能力是地下矿井稳定性和设计分析的有价值的工具。 ]]>

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号