软岩地层深部开采地表下沉分析  

Analysis of Ground Subsidence due to Deep Mining in Soft Rock Strata

作　　者：李文秀[1] 郭玉贵[1] 侯晓兵[1] 赵胜涛[1] 杨少冲[1] 戴兰芳[1] 

机构地区：[1]河北大学岩土工程研究所,保定071002

出　　处：《地下空间与工程学报》2006年第6期938-941,共4页Chinese Journal of Underground Space and Engineering

基　　金：河北省科技攻关计划项目(05213706);河北省教育厅科研项目(2004308);河北省科技攻关计划项目(3213810)

摘　　要：针对软岩地层深部地下大面积开采岩体移动变形预测问题,利用弹塑性力学理论建立了相应的预测分析理论模型。用所建立的弹性理论模型对某铁矿地表移动变形进行了计算分析,并将理论预测结果和实测资料进行了对比。文中用弹塑性有限元法分析了不同弹性模量、泊松比、内聚力、内摩擦角等物理力学参数对地表下沉的影响;对软岩地层深部开采地表移动进行了计算分析。结果表明,弹性模量对地表下沉影响较大,而其他参数影响较小。结果表明,弹塑性力学方法适用于分析软岩地层大面积开挖岩体移动预测问题。The elastic- plastic theoretical model was established for estimating rockmass displacement and deformation due to large scale deep underground mining in soft rock strata. The model was used to predict ground movement and deformation of the iron mine, and the theoretical values were compared with the probability integral results and measured data. The paper utilized the elastic - plastic finite element method to verify that the mechanics parameters had influence on ground subsidence caused by underground mining in soft rock strata. The ground subsidence for different elastic modulus, Poisson＇s rate, cohesion and angle of internal friction are calculated. The results show that only the elastic modulus has influence, while others have few or no influence on the ground subsidence caused by underground mining in soft rock strata. The agreement of the theoretical results with the field measurement shows that the model is satisfactory and the formulas obtained are valid and this can be effectively used for predicting the movements due to large scale underground excavation in soft rock strata.

关 键 词：岩石力学 地表下沉 弹塑性 力学参数 

分 类 号：TD325[矿业工程—矿井建设]