井筒非采动变形破坏附加应力影响因素分析  

Analysis of influencing factors of additional stress of deformation and failure induced by non-mining disturbance in shaft

作　　者：黄晖[1] 贾海宾[2,3] 韩必武[1] 朱昌淮[1] 刘可胜[1] 

机构地区：[1]淮南矿业集团有限责任公司,安徽淮南232001 [2]山东科技大学土木建筑学院,山东青岛266590 [3]山东新巨龙能源有限责任公司,山东菏泽274918

出　　处：《煤田地质与勘探》2014年第1期40-44,共5页Coal Geology & Exploration

摘　　要：立井井筒的非采动变形破坏是出现在华东厚表土层矿区的一种特殊矿山地质灾害,底部含水层失水压缩变形产生的附加应力是造成这一地质灾害的主要原因。在总结井筒发生非采动变形破坏的地质条件和破坏特征基础之上,通过建立三维数值模拟模型,分析了不同影响因素作用下井筒外壁所受附加应力的大小和变化规律,并根据模拟结果,利用弹性力学厚壁圆筒解建立井筒变形破坏应力状态与底部含水层水头降之间的对应关系,得到井筒变形破坏极限状态下对应的底部含水层水头降为89.5 m。Non-mining disturbance-induced deformation and failure in shaft is a special mine geological hazard in mining areas with thick alluvium layer in East China. Additional stress induced by water loss and compression de-formation in bottom aquifer is the major cause for the geological hazard. On the basis of summarizing the geologi-cal conditions and characteristics of deformation and failure induced by non-mining disturbance in shaft, the paper analyzes the amplitude and variation regularities of the additional stress in outer wall of shaft under action of dif-ferent influencing factors through 3-D numerical modeling. On the basis of the modeling results and using elastic mechanics to solve the shaft with thick wall, the relationship between stress condition of deformation and failure and water head drop in bottom aquifer was established, it was indicated that the corresponding water head drop under limit state of deformation and failure in shaft was 89.5 m.

关 键 词：井筒 非采动破坏 影响因素 数值模拟 破坏预测 

分 类 号：TD163[矿业工程—矿山地质测量]