基于深部土本构关系钻井法施工井简的数值模拟  

Numerical simulation of mine shaft excavation with full mine shaft drilling method based on deep soil and in-situ structural relation

作　　者：孙如华[1] 李文平[1] 王维理[2] 

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221116 [2]北京市勘察设计研究院,北京100038

出　　处：《煤炭科学技术》2008年第7期27-30,共4页Coal Science and Technology

基　　金：国家自然科学基金资助项目(40272114，40572160);中国矿业大学青年科研基金资助项目(2006A017)

摘　　要：为了在钻井法井筒开挖施工中更科学合理地选用不同泥浆参数以抵抗深厚地层变形,防止缩径,影响钻头提出和下沉井壁。建立了描述巨野矿区深部土高压卸载结构性本构模型,并应用此模型进行泥浆容重在10.8～12kN/m^3两个极值条件下的数值模拟研究,分析了深厚土层中拟建井简开挖土体变形大小和随深度变化规律,并提出了在井筒钻进时应合理选择泥浆容重。In order to scientifically and rationally select different mud parameters to prevent the deep thick strata deformation, the shaft di- ameter convergence, the influence to the drilling bit lifting and the mine shaft linear sinking during the mine shaft excavation with the full mine shaft drilling method, a model was established to state the deep soil high pressure releasing structure of the Juye Mining area. The model was applied to the research on the numerical simulation of the mud volume-weigh under the ultra value conditions of 10.8～12 kN/m^3. The paper analyzed the soil deformation value and the variation law with the depth increased for the proposed mine shaft excava- tion in deep thick soil and provided the rational selected mud volume-weigh foE the mine shaft drilling operation.

关 键 词：深部土 结构性 本构关系 泥浆 井筒缩径 

分 类 号：TD262[矿业工程—矿井建设]