深冻结井筒温度场成孔弱界面分析  

Analysis of weak interface between the actual holes in deep frozen shaft temperature field

作　　者：陈红蕾 高伟 李宁 孙右好 

机构地区：[1]北京中煤矿山工程有限公司,北京100013

出　　处：《冰川冻土》2015年第2期434-439,共6页Journal of Glaciology and Geocryology

基　　金："十二五"国家科技支撑计划项目(2012BAB13B02);天地科技重大技术创新项目(zdjs-2010bjzm-1)资助

摘　　要：两个孔形成的冻结壁强度弱面通常位于两冻结孔界面上,但对于深冻结井筒成孔孔位,冻结壁薄弱界面选择具有一定的复杂性.针对深冻结井筒温度场成孔弱界面,应用数值模拟软件ANSYS分析了世界第一深冻结井筒在三个水平位置上冻结孔实际孔位下温度场弱界面参数.结果表明:冻结壁弱界面确定不仅要考虑成孔最大孔间距,同时也要评定成孔孔距到设计圈径上的投影长度、相邻孔的分布特征及成孔内偏值.首次指出成孔孔距到设计圈径上的投影长度为冻结壁弱界面评定条件之一,具有重要意义.The weak interface of tw o holes locates on the interface of tw o frozen holes,but the irregularity of distribution around the design location in deep frozen shaft leads to the complexity in selection of the weak interface. For the weak interface in deep frozen shaft temperature field,with the help of the finite element method,the temperature field of the deepest frozen shaft in the world has been studied based on the actual holes in three depth levels,and the frozen wall temperature parameters of the weak interface were analyzed. It is pointed out that not only the maximum distance betw een holes,but also the length of the projection in designed perimeter,the inner deviation of the holes and the distribution of the adjacent holes are necessary to consider when selecting a weak interface. It is of great significance that in this paper,the length of the projection in designed perimeter is firstly pointed out as one of the factors that influence weak interface.

关 键 词：深冻结井 弱界面 成孔孔距 投影长度 内偏值 

分 类 号：TD265.3[矿业工程—矿井建设]