弹性应力集中的孔间耦合作用及其工程应用

Coupled action of stress concentration between holes and its engineering application

通过分析双孔耦合应力场以及双孔的孔径比、孔间距对应力场分布规律的影响,发现了大孔与小孔之间的临界距离现象,即小于临界距离时,大孔的存在将急剧增大小孔边缘的应力,而大于临界距离时,大孔的存在对小孔边缘的应力影响程度不明显.此结论可用于指导矿山采空区旁边巷道位置的合理选择.

The coupled stress fields of double holes, as well as the effects of aperture ratio anti distance between holes on stress distribution, were analyzed, from which the critical distance between holes was found and it was concluded that the stress concentration factor of the small hole is rapidly increased with the distance between the holes decreasing under the critical distance; otherwise, the influence of the big hole on the stress concentration factor of the small hole is not obvious when the distance between holes exceeds the critical distance, The conclusions are significant for selecting the reasonable locations Oflaneways in mining engineering.